Bump version: v2.8.1

[pre-commit.ci] pre-commit autoupdate

.github/dependabot.yml

@@ -5,6 +5,3 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
-    ignore:
-      - dependency-name: "actions/*"
-        update-types: ["version-update:semver-minor", "version-update:semver-patch"]

.github/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Build SDist and wheel
       run: pipx run build
 
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v3
       with:
         path: dist/*
 
@@ -29,7 +29,7 @@ jobs:
     if: github.event_name == 'release' && github.event.action == 'published'
 
     steps:
-    - uses: actions/download-artifact@v2
+    - uses: actions/download-artifact@v3
       with:
         name: artifact
         path: dist

.github/workflows/test.yml

@@ -20,8 +20,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
-    - uses: actions/setup-python@v3
-    - uses: pre-commit/action@v2.0.3
+    - uses: actions/setup-python@v4
+      with:
+        python-version: "3.x"
+    - uses: pre-commit/action@v3.0.0
     - name: Check manifest
       run: pipx run nox -s check_manifest
     - name: PyLint checks
@@ -35,40 +37,52 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-11]
+        os: [ubuntu-18.04, windows-latest, macos-11]
         python_version: ['3.10']
     timeout-minutes: 180
     steps:
     - uses: actions/checkout@v3
-    - uses: actions/setup-python@v3
+    - uses: actions/setup-python@v4
       name: Install Python ${{ matrix.python_version }}
       with:
         python-version: ${{ matrix.python_version }}
 
+    # Install podman on this CI instance for podman tests on linux
+    # Snippet from: https://github.com/redhat-actions/podman-login/blob/main/.github/workflows/example.yml
+    - name: Install latest podman
+      if: runner.os == 'Linux'
+      run: |
+        . /etc/os-release
+        echo "deb https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_${VERSION_ID}/ /" | sudo tee /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list
+        curl -sSfL "https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_${VERSION_ID}/Release.key" | sudo apt-key add -
+        sudo apt-get update
+        sudo apt-get -y upgrade
+        sudo apt-get -y install podman
+
     - name: Install dependencies
       run: |
         python -m pip install ".[test]"
 
-    - name: Sample build
-      if: "contains(github.event.pull_request.labels.*.name, 'CI: Sample build')"
-      run: |
-        python bin/sample_build.py
-
-    - name: Get some sample wheels
+    - name: Generate a sample project
       run: |
         python -m test.test_projects test.test_0_basic.basic_project sample_proj
-        cibuildwheel --output-dir wheelhouse sample_proj
+
+    - name: Run a sample build (GitHub Action)
+      uses: ./
+      with:
+        package-dir: sample_proj
+        output-dir: wheelhouse
       env:
         CIBW_ARCHS_MACOS: x86_64 universal2 arm64
 
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v3
       with:
-        name: sample_wheels
+        name: sample_wheels_action
         path: wheelhouse
 
     - name: Test cibuildwheel
       run: |
-        python ./bin/run_tests.py
+        python ./bin/run_tests.py --run-podman
 
   test-emulated:
     name: Test emulated cibuildwheel using qemu
@@ -77,14 +91,16 @@ jobs:
     timeout-minutes: 180
     steps:
     - uses: actions/checkout@v3
-    - uses: actions/setup-python@v3
+    - uses: actions/setup-python@v4
+      with:
+        python-version: "3.x"
     - name: Install dependencies
       run: |
         python -m pip install ".[test]"
 
     - name: Set up QEMU
       id: qemu
-      uses: docker/setup-qemu-action@v1
+      uses: docker/setup-qemu-action@v2
       with:
         platforms: all
 

.github/workflows/update-dependencies.yml

@@ -12,7 +12,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
-    - uses: excitedleigh/setup-nox@v2.0.0
+    - uses: actions/setup-python@v4
+      with:
+        python-version: "3.11-dev"
+    - uses: excitedleigh/setup-nox@v2.1.0
 
     - name: "Run update: dependencies"
       run: nox --force-color -s update_constraints
@@ -41,5 +44,7 @@ jobs:
 
           PR generated by "Update dependencies" [workflow](https://github.com/${{github.repository}}/actions/runs/${{github.run_id}}).
         branch: update-dependencies-pr
+        committer: "cibuildwheel-bot[bot] <83877280+cibuildwheel-bot[bot]@users.noreply.github.com>"
+        author: "cibuildwheel-bot[bot] <83877280+cibuildwheel-bot[bot]@users.noreply.github.com>"
         token: ${{ steps.generate-token.outputs.token }}
         delete-branch: true

.pre-commit-config.yaml

@@ -1,7 +1,7 @@
 repos:
 
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v4.1.0
+  rev: v4.3.0
   hooks:
   - id: check-case-conflict
   - id: check-merge-conflict
@@ -14,7 +14,7 @@ repos:
   - id: trailing-whitespace
 
 - repo: https://github.com/asottile/pyupgrade
-  rev: v2.31.1
+  rev: v2.37.1
   hooks:
   - id: pyupgrade
     name: PyUpgrade 3.6+
@@ -27,7 +27,7 @@ repos:
 
 # Autoremoves unused imports
 - repo: https://github.com/hadialqattan/pycln
-  rev: v1.2.5
+  rev: v2.0.3
   hooks:
   - id: pycln
     args: [--all]
@@ -39,17 +39,17 @@ repos:
   - id: isort
 
 - repo: https://github.com/psf/black
-  rev: 22.3.0
+  rev: 22.6.0
   hooks:
   - id: black
 
 - repo: https://github.com/asottile/setup-cfg-fmt
-  rev: v1.20.0
+  rev: v1.20.1
   hooks:
   - id: setup-cfg-fmt
 
 - repo: https://github.com/pre-commit/mirrors-mypy
-  rev: v0.942
+  rev: v0.961
   hooks:
   - id: mypy
     name: mypy 3.6 on cibuildwheel/
@@ -61,6 +61,7 @@ repos:
       - pygithub
       - rich
       - tomli
+      - tomli_w
       - types-certifi
       - types-click
       - types-dataclasses

.travis.yml

@@ -52,4 +52,11 @@ install:
 - $PYTHON -m pip install -U pip
 - $PYTHON -m pip install -e ".[dev]" pytest-custom-exit-code
 
-script: $PYTHON ./bin/run_tests.py
+script: |
+  # travis_wait disable the output while waiting
+  # use the same kind of tricks as in multibuild
+  (while true; do echo "travis_keep_alive"; sleep 300; done) &
+  SPINNER_PID=$!
+  disown
+  $PYTHON ./bin/run_tests.py
+  kill -9 ${SPINNER_PID}

README.md

@@ -29,6 +29,7 @@ What does it do?
 | CPython 3.8   | ✅ | ✅  | ✅  | ✅  | N/A | ✅ | ✅  | ✅ | ✅  | ✅  |
 | CPython 3.9   | ✅ | ✅  | ✅  | ✅  | ✅² | ✅³ | ✅ | ✅ | ✅  | ✅  |
 | CPython 3.10  | ✅ | ✅  | ✅  | ✅  | ✅² | ✅ | ✅  | ✅ | ✅  | ✅  |
+| CPython 3.11⁴ | ✅ | ✅  | ✅  | ✅  | ✅² | ✅ | ✅  | ✅ | ✅  | ✅  |
 | PyPy 3.7 v7.3 | ✅ | N/A | ✅  | N/A | N/A | ✅¹ | ✅¹  | ✅¹ | N/A | N/A |
 | PyPy 3.8 v7.3 | ✅ | N/A | ✅  | N/A | N/A | ✅¹ | ✅¹  | ✅¹ | N/A | N/A |
 | PyPy 3.9 v7.3 | ✅ | N/A | ✅  | N/A | N/A | ✅¹ | ✅¹  | ✅¹ | N/A | N/A |
@@ -36,6 +37,7 @@ What does it do?
 <sup>¹ PyPy is only supported for manylinux wheels.</sup><br>
 <sup>² Windows arm64 support is experimental.</sup><br>
 <sup>³ Alpine 3.14 and very briefly 3.15's default python3 [was not able to load](https://github.com/pypa/cibuildwheel/issues/934) musllinux wheels. This has been fixed; please upgrade the python package if using Alpine from before the fix.</sup><br>
+<sup>⁴ CPython 3.11 is available using the [CIBW_PRERELEASE_PYTHONS](https://cibuildwheel.readthedocs.io/en/stable/options/#prerelease-pythons) option.</sup><br>
 
 - Builds manylinux, musllinux, macOS 10.9+, and Windows wheels for CPython and PyPy
 - Works on GitHub Actions, Azure Pipelines, Travis CI, AppVeyor, CircleCI, and GitLab CI
@@ -78,16 +80,16 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, windows-2019, macOS-10.15]
+        os: [ubuntu-20.04, windows-2019, macOS-11]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       # Used to host cibuildwheel
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v3
 
       - name: Install cibuildwheel
-        run: python -m pip install cibuildwheel==2.4.0
+        run: python -m pip install cibuildwheel==2.8.1
 
       - name: Build wheels
         run: python -m cibuildwheel --output-dir wheelhouse
@@ -95,13 +97,22 @@ jobs:
         # env:
         #   CIBW_SOME_OPTION: value
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           path: ./wheelhouse/*.whl
 ```
 
 For more information, including PyPI deployment, and the use of other CI services or the dedicated GitHub Action, check out the [documentation](https://cibuildwheel.readthedocs.org) and the [examples](https://github.com/pypa/cibuildwheel/tree/main/examples).
 
+How it works
+------------
+
+The following diagram summarises the steps that cibuildwheel takes on each platform.
+
+![](docs/data/how-it-works.png)
+
+<sup>Explore an interactive version of this diagram [in the docs](https://cibuildwheel.readthedocs.io/en/stable/#how-it-works).</sup>
+
 Options
 -------
 
@@ -117,8 +128,9 @@ Options
 |   | [`CIBW_ENVIRONMENT_PASS_LINUX`](https://cibuildwheel.readthedocs.io/en/stable/options/#environment-pass)  | Set environment variables on the host to pass-through to the container during the build. |
 |   | [`CIBW_BEFORE_ALL`](https://cibuildwheel.readthedocs.io/en/stable/options/#before-all)  | Execute a shell command on the build system before any wheels are built. |
 |   | [`CIBW_BEFORE_BUILD`](https://cibuildwheel.readthedocs.io/en/stable/options/#before-build)  | Execute a shell command preparing each wheel's build |
-|   | [`CIBW_REPAIR_WHEEL_COMMAND`](https://cibuildwheel.readthedocs.io/en/stable/options/#repair-wheel-command)  | Execute a shell command to repair each (non-pure Python) built wheel |
+|   | [`CIBW_REPAIR_WHEEL_COMMAND`](https://cibuildwheel.readthedocs.io/en/stable/options/#repair-wheel-command)  | Execute a shell command to repair each built wheel |
 |   | [`CIBW_MANYLINUX_*_IMAGE`<br/>`CIBW_MUSLLINUX_*_IMAGE`](https://cibuildwheel.readthedocs.io/en/stable/options/#linux-image)  | Specify alternative manylinux / musllinux Docker images |
+|   | [`CIBW_CONTAINER_ENGINE`](https://cibuildwheel.readthedocs.io/en/stable/options/#container-engine)  | Specify which container engine to use when building Linux wheels |
 |   | [`CIBW_DEPENDENCY_VERSIONS`](https://cibuildwheel.readthedocs.io/en/stable/options/#dependency-versions)  | Specify how cibuildwheel controls the versions of the tools it uses |
 | **Testing** | [`CIBW_TEST_COMMAND`](https://cibuildwheel.readthedocs.io/en/stable/options/#test-command)  | Execute a shell command to test each built wheel |
 |   | [`CIBW_BEFORE_TEST`](https://cibuildwheel.readthedocs.io/en/stable/options/#before-test)  | Execute a shell command before testing each wheel |
@@ -141,26 +153,26 @@ Here are some repos that use cibuildwheel.
 | Name                              | CI | OS | Notes |
 |-----------------------------------|----|----|:------|
 | [scikit-learn][]                  | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | The machine learning library. A complex but clean config using many of cibuildwheel's features to build a large project with Cython and C++ extensions.  |
+| [NumPy][]                         | ![github icon][] ![travisci icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | The fundamental package for scientific computing with Python. |
 | [Tornado][]                       | ![travisci icon][] | ![apple icon][] ![linux icon][] | Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed. |
 | [pytorch-fairseq][]               | ![github icon][] | ![apple icon][] ![linux icon][] | Facebook AI Research Sequence-to-Sequence Toolkit written in Python. |
 | [Matplotlib][]                    | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | The venerable Matplotlib, a Python library with C++ portions |
-| [MyPy][]                          | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | MyPyC, the compiled component of MyPy. |
+| [NCNN][]                          | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | ncnn is a high-performance neural network inference framework optimized for the mobile platform |
+| [Kivy][]                          | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Open source UI framework written in Python, running on Windows, Linux, macOS, Android and iOS |
+| [Prophet][]                       | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Tool for producing high quality forecasts for time series data that has multiple seasonality with linear or non-linear growth. |
+| [MyPy][]                          | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | The compiled version of MyPy using MyPyC. |
 | [pydantic][]                      | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Data parsing and validation using Python type hints |
-| [uvloop][]                        | ![github icon][] | ![apple icon][] ![linux icon][] | Ultra fast asyncio event loop. |
-| [psutil][]                        | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Cross-platform lib for process and system monitoring in Python |
-| [vaex][]                          | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Out-of-Core hybrid Apache Arrow/NumPy DataFrame for Python, ML, visualization and exploration of big tabular data at a billion rows per second 🚀 |
-| [Google Benchmark][]              | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | A microbenchmark support library |
 
 [scikit-learn]: https://github.com/scikit-learn/scikit-learn
+[NumPy]: https://github.com/numpy/numpy
 [Tornado]: https://github.com/tornadoweb/tornado
 [pytorch-fairseq]: https://github.com/pytorch/fairseq
 [Matplotlib]: https://github.com/matplotlib/matplotlib
+[NCNN]: https://github.com/Tencent/ncnn
+[Kivy]: https://github.com/kivy/kivy
+[Prophet]: https://github.com/facebook/prophet
 [MyPy]: https://github.com/mypyc/mypy_mypyc-wheels
 [pydantic]: https://github.com/samuelcolvin/pydantic
-[uvloop]: https://github.com/MagicStack/uvloop
-[psutil]: https://github.com/giampaolo/psutil
-[vaex]: https://github.com/vaexio/vaex
-[Google Benchmark]: https://github.com/google/benchmark
 
 [appveyor icon]: docs/data/readme_icons/appveyor.svg
 [github icon]: docs/data/readme_icons/github.svg
@@ -192,51 +204,49 @@ Changelog
 
 <!-- this section was generated by bin/update_readme_changelog.py -- do not edit manually -->
 
-### v2.4.0
+### v2.8.1
 
-_2 April 2022_
+_18 July 2022_
 
-- ✨ cibuildwheel now supports running locally on Windows and macOS (as well as Linux). On macOS, you'll have to install the versions of Pythons that you want to use from Python.org, and cibuildwheel will use them. On Windows, cibuildwheel will install it's own versions of Python. Check out [the documentation](https://cibuildwheel.readthedocs.io/en/stable/setup/#local) for instructions. (#974)
-- ✨ Added support for building PyPy 3.9 wheels. (#1031)
-- ✨ Listing at the end of the build now displays the size of each wheel (#975)
-- 🐛 Workaround a connection timeout bug on Travis CI ppc64le runners (#906)
-- 🐛 Fix an encoding error when reading setup.py in the wrong encoding (#977)
-- 🛠 Setuptools updated to 61.3.0, including experimental support for reading config from pyproject.toml(PEP 621). This could change the behaviour of your build if you have a pyproject.toml with a `[project]` table, because that takes precedence over setup.py and setup.cfg. Check out the [setuptools docs](https://setuptools.pypa.io/en/latest/userguide/pyproject_config.html) and the [project metadata specification](https://packaging.python.org/en/latest/specifications/declaring-project-metadata/) for more info.
-- 🛠 Many other dependency updates.
-- 📚 Minor docs improvements
+- 🐛 Fix a bug when building CPython 3.8 wheels on an Apple Silicon machine where testing would always fail. cibuildwheel will no longer attempt to test the arm64 part of CPython 3.8 wheels because we use the x86_64 installer of CPython 3.8 due to its macOS system version backward-compatibility. See [#1169](https://github.com/pypa/cibuildwheel/pull/1169) for more details. (#1171)
+- 🛠 Update the prerelease CPython 3.11 to 3.11.0b4. (#1180)
+- 🛠 The GitHub Action will ensure a compatible version of Python is installed on the runner (#1114)
+- 📚 A few docs improvements
 
-### v2.3.1
+### v2.8.0
 
-_14 December 2021_
+_5 July 2022_
 
-- 🐛 Setting pip options like `PIP_USE_DEPRECATED` in `CIBW_ENVIRONMENT` no longer adversely affects cibuildwheel's ability to set up a Python environment (#956)
-- 📚 Docs fixes and improvements
+- ✨ You can now run cibuildwheel on Podman, as an alternate container engine to Docker (which remains the default). This is useful in environments where a Docker daemon isn't available, for example, it can be run inside a Docker container, or without root access. To use Podman, set the [`CIBW_CONTAINER_ENGINE`](https://cibuildwheel.readthedocs.io/en/stable/options/#container-engine) option. (#966)
+- ✨ Adds support for building `py3-none-{platform}` wheels. This works the same as ABI3 - wheels won't be rebuilt, but tests will still be run across all selected versions of Python.
 
-### v2.3.0
+  > These wheels contain native extension code, but don't use the Python APIs. Typically, they're bridged to Python using a FFI module like [ctypes](https://docs.python.org/3/library/ctypes.html) or [cffi](https://cffi.readthedocs.io/en/latest/). Because they don't use Python ABI, the wheels are more compatible - they work across many Python versions.
 
-_26 November 2021_
+  Check out this [example ctypes project](https://github.com/joerick/python-ctypes-package-sample) to see an example of how it works. (#1151)
+- 🛠 cibuildwheel will now error if multiple builds in a single run produce the same wheel filename, as this indicates a misconfiguration. (#1152)
+- 📚 A few docs improvements and updates to keep things up-to-date.
 
-- 📈 cibuildwheel now defaults to manylinux2014 image for linux builds, rather than manylinux2010. If you want to stick with manylinux2010, it's simple to set this using [the image options](https://cibuildwheel.readthedocs.io/en/stable/options/#linux-image). (#926)
-- ✨ You can now pass environment variables from the host machine into the Docker container during a Linux build. Check out [the docs for `CIBW_ENVIRONMENT_PASS_LINUX `](https://cibuildwheel.readthedocs.io/en/latest/options/#environment-pass) for the details. (#914)
-- ✨ Added support for building PyPy 3.8 wheels. (#881)
-- ✨ Added support for building Windows arm64 CPython wheels on a Windows arm64 runner. We can't test this in CI yet, so for now, this is experimental. (#920)
-- 📚 Improved the deployment documentation (#911)
-- 🛠 Changed the escaping behaviour inside cibuildwheel's  option placeholders e.g. `{project}` in `before_build` or `{dest_dir}` in `repair_wheel_command`. This allows bash syntax like `${SOME_VAR}` to passthrough without being interpreted as a placeholder by cibuildwheel. See [this section](https://cibuildwheel.readthedocs.io/en/stable/options/#placeholders) in the docs for more info. (#889)
-- 🛠 Pip updated to 21.3, meaning it now defaults to in-tree builds again. If this causes an issue with your project, setting environment variable `PIP_USE_DEPRECATED=out-of-tree-build` is available as a temporary flag to restore the old behaviour. However, be aware that this flag will probably be removed soon. (#881)
-- 🐛 You can now access the current Python interpreter using `python3` within a build on Windows (#917)
+### v2.7.0
 
-### v2.2.2
+_17 June 2022_
 
-_26 October 2021_
+- 🌟 Added support for the new `manylinux_2_28` images. These new images are based on AlmaLinux, the community-driven successor to CentOS, unlike manylinux_2_24, which was based on Debian. To build on these images, set your [`CIBW_MANYLINUX_*_IMAGE`](https://cibuildwheel.readthedocs.io/en/stable/options/#linux-image) option to `manylinux_2_28`. (#1026)
+- 🐛 Fix a bug where tests were not being run on CPython 3.11 (when CIBW_PRERELEASE_PYTHONS was set) (#1138)
+- ✨ You can now build Linux wheels on Windows, as long as you have Docker installed and set to 'Linux containers' (#1117)
+- 🐛 Fix a bug on macOS that caused cibuildwheel to crash trying to overwrite a previously-built wheel of the same name. (#1129)
 
-- 🐛 Fix bug in the GitHub Action step causing a syntax error (#895)
+### v2.6.1
 
-### v2.2.1
+_7 June 2022_
 
-_26 October 2021_
+- 🛠 Update the prerelease CPython 3.11 to 3.11.0b3
 
-- 🛠 Added a `config-file` option on the GitHub Action to specify something other than pyproject.toml in your GitHub Workflow file. (#883)
-- 🐛 Fix missing resources in sdist and released wheel on PyPI. We've also made some internal changes to our release processes to make them more reliable. (#893, #894)
+### v2.6.0
+
+_25 May 2022_
+
+- 🌟 Added the ability to test building wheels on CPython 3.11! Because CPython 3.11 is in beta, these wheels should not be distributed, because they might not be compatible with the final release, but it's available to build for testing purposes. Use the flag [`--prerelease-pythons` or `CIBW_PRERELEASE_PYTHONS`](https://cibuildwheel.readthedocs.io/en/stable/options/#prerelease-pythons) to test. This version of cibuildwheel includes CPython 3.11.0b1. (#1109)
+- 📚 Added an interactive diagram showing how cibuildwheel works to the [docs](https://cibuildwheel.readthedocs.io/en/stable/#how-it-works) (#1100)
 
 <!-- END bin/update_readme_changelog.py -->
 
@@ -283,6 +293,6 @@ Massive props also to-
 See also
 ========
 
-If you'd like to keep wheel building separate from the package itself, check out [astrofrog/autowheel](https://github.com/astrofrog/autowheel). It builds packages using cibuildwheel from source distributions on PyPI.
-
 Another very similar tool to consider is [matthew-brett/multibuild](http://github.com/matthew-brett/multibuild). `multibuild` is a shell script toolbox for building a wheel on various platforms. It is used as a basis to build some of the big data science tools, like SciPy.
+
+If you are building Rust wheels, you can get by without some of the tricks required to make GLIBC work via manylinux; this is especially relevant for cross-compiling, which is easy with Rust. See [maturin-action](https://github.com/messense/maturin-action) for a tool that is optimized for building Rust wheels and cross-compiling.

action.yml

@@ -20,10 +20,17 @@ branding:
 runs:
   using: composite
   steps:
+    # Set up a non-EOL, cibuildwheel & pipx supported Python version
+    - uses: actions/setup-python@v4
+      id: python
+      with:
+        python-version: "3.7 - 3.10"
+        update-environment: false
 
     # Redirecting stderr to stdout to fix interleaving issue in Actions.
     - run: >
         pipx run
+        --python '${{ steps.python.outputs.python-path }}'
         --spec '${{ github.action_path }}'
         cibuildwheel
         ${{ inputs.package-dir }}

azure-pipelines.yml

@@ -11,7 +11,7 @@ jobs:
         python ./bin/run_tests.py
 
 - job: macos_38
-  pool: {vmImage: 'macOS-10.15'}
+  pool: {vmImage: 'macOS-11'}
   steps:
     - task: UsePythonVersion@0
       inputs:

bin/bump_version.py

@@ -184,7 +184,7 @@ def bump_version() -> None:
     print()
 
     release_url = "https://github.com/pypa/cibuildwheel/releases/new?" + urllib.parse.urlencode(
-        {"tag": new_version}
+        {"tag": f"v{new_version}"}
     )
     print("Then create a release at the URL:")
     print(f"    {release_url}")

bin/run_tests.py

@@ -1,33 +1,47 @@
 #!/usr/bin/env python3
 
+import argparse
 import os
 import subprocess
 import sys
 from pathlib import Path
 
 if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "--run-podman", action="store_true", default=False, help="run podman tests (linux only)"
+    )
+    args = parser.parse_args()
+
     # move cwd to the project root
     os.chdir(Path(__file__).resolve().parents[1])
 
-    # run the unit tests
+    # unit tests
     unit_test_args = [sys.executable, "-m", "pytest", "unit_test"]
-    # run the docker unit tests only on Linux
+
     if sys.platform.startswith("linux"):
+        # run the docker unit tests only on Linux
         unit_test_args += ["--run-docker"]
+
+        if args.run_podman:
+            unit_test_args += ["--run-podman"]
+
     subprocess.run(unit_test_args, check=True)
 
-    # run the integration tests
-    subprocess.run(
-        [
-            sys.executable,
-            "-m",
-            "pytest",
-            "--numprocesses=2",
-            "-x",
-            "--durations",
-            "0",
-            "--timeout=2400",
-            "test",
-        ],
-        check=True,
-    )
+    # integration tests
+    integration_test_args = [
+        sys.executable,
+        "-m",
+        "pytest",
+        "--numprocesses=2",
+        "-x",
+        "--durations",
+        "0",
+        "--timeout=2400",
+        "test",
+    ]
+
+    if sys.platform.startswith("linux") and args.run_podman:
+        integration_test_args += ["--run-podman"]
+
+    subprocess.run(integration_test_args, check=True)

bin/update_docker.py

@@ -2,8 +2,8 @@
 from __future__ import annotations
 
 import configparser
+from dataclasses import dataclass
 from pathlib import Path
-from typing import NamedTuple
 
 import requests
 
@@ -11,7 +11,8 @@ DIR = Path(__file__).parent.resolve()
 RESOURCES = DIR.parent / "cibuildwheel/resources"
 
 
-class Image(NamedTuple):
+@dataclass(frozen=True)
+class Image:
     manylinux_version: str
     platform: str
     image_name: str
@@ -45,6 +46,12 @@ images = [
     Image("manylinux_2_24", "pypy_x86_64", "quay.io/pypa/manylinux_2_24_x86_64", None),
     Image("manylinux_2_24", "pypy_i686", "quay.io/pypa/manylinux_2_24_i686", None),
     Image("manylinux_2_24", "pypy_aarch64", "quay.io/pypa/manylinux_2_24_aarch64", None),
+    # manylinux_2_28 images
+    Image("manylinux_2_28", "x86_64", "quay.io/pypa/manylinux_2_28_x86_64", None),
+    Image("manylinux_2_28", "aarch64", "quay.io/pypa/manylinux_2_28_aarch64", None),
+    Image("manylinux_2_28", "ppc64le", "quay.io/pypa/manylinux_2_28_ppc64le", None),
+    Image("manylinux_2_28", "pypy_x86_64", "quay.io/pypa/manylinux_2_28_x86_64", None),
+    Image("manylinux_2_28", "pypy_aarch64", "quay.io/pypa/manylinux_2_28_aarch64", None),
     # musllinux_1_1 images
     Image("musllinux_1_1", "x86_64", "quay.io/pypa/musllinux_1_1_x86_64", None),
     Image("musllinux_1_1", "i686", "quay.io/pypa/musllinux_1_1_i686", None),

bin/update_pythons.py

@@ -5,13 +5,19 @@ from __future__ import annotations
 import copy
 import difflib
 import logging
+import sys
 from pathlib import Path
 from typing import Any, Union
 
 import click
 import requests
 import rich
-import tomli
+
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli as tomllib
+
 from packaging.specifiers import Specifier
 from packaging.version import Version
 from rich.logging import RichHandler
@@ -296,7 +302,7 @@ def update_pythons(force: bool, level: str) -> None:
 
     original_toml = toml_file_path.read_text()
     with toml_file_path.open("rb") as f:
-        configs = tomli.load(f)
+        configs = tomllib.load(f)
 
     for config in configs["windows"]["python_configurations"]:
         all_versions.update_config(config)

bin/update_virtualenv.py

@@ -5,12 +5,18 @@ from __future__ import annotations
 import difflib
 import logging
 import subprocess
+import sys
+from dataclasses import dataclass
 from pathlib import Path
-from typing import NamedTuple
 
 import click
 import rich
-import tomli
+
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli as tomllib
+
 from packaging.version import InvalidVersion, Version
 from rich.logging import RichHandler
 from rich.syntax import Syntax
@@ -30,7 +36,8 @@ GET_VIRTUALENV_URL_TEMPLATE: Final[
 ] = f"{GET_VIRTUALENV_GITHUB}/blob/{{version}}/public/virtualenv.pyz?raw=true"
 
 
-class VersionTuple(NamedTuple):
+@dataclass(frozen=True, order=True)
+class VersionTuple:
     version: Version
     version_string: str
 
@@ -78,7 +85,7 @@ def update_virtualenv(force: bool, level: str) -> None:
 
     original_toml = toml_file_path.read_text()
     with toml_file_path.open("rb") as f:
-        loaded_file = tomli.load(f)
+        loaded_file = tomllib.load(f)
     version = str(loaded_file["version"])
     versions = git_ls_remote_versions(GET_VIRTUALENV_GITHUB)
     if versions[0].version > Version(version):

cibuildwheel/__init__.py

@@ -1 +1 @@
-__version__ = "2.4.0"
+__version__ = "2.8.1"

cibuildwheel/__main__.py

@@ -2,6 +2,8 @@ import argparse
 import os
 import shutil
 import sys
+import tarfile
+import tempfile
 import textwrap
 from pathlib import Path
 from tempfile import mkdtemp
@@ -20,13 +22,12 @@ from cibuildwheel.util import (
     CIBW_CACHE_PATH,
     BuildSelector,
     Unbuffered,
+    chdir,
     detect_ci_provider,
 )
 
 
 def main() -> None:
-    platform: PlatformName
-
     parser = argparse.ArgumentParser(
         description="Build wheels for all the platforms.",
         epilog="""
@@ -45,7 +46,7 @@ def main() -> None:
             auto-detected platform or to run cibuildwheel on your development
             machine. Specifying "macos" or "windows" only works on that
             operating system, but "linux" works on all three, as long as
-            Docker is installed. Default: auto.
+            Docker/Podman is installed. Default: auto.
         """,
     )
 
@@ -65,6 +66,8 @@ def main() -> None:
 
     parser.add_argument(
         "--output-dir",
+        type=Path,
+        default=Path(os.environ.get("CIBW_OUTPUT_DIR", "wheelhouse")),
         help="Destination folder for the wheels. Default: wheelhouse.",
     )
 
@@ -72,20 +75,26 @@ def main() -> None:
         "--config-file",
         default="",
         help="""
-            TOML config file. Default: "", meaning {package}/pyproject.toml,
-            if it exists.
+            TOML config file. Default: "", meaning {package}/pyproject.toml, if
+            it exists. To refer to a project inside your project, use {package};
+            this matters if you build from an SDist.
         """,
     )
 
     parser.add_argument(
         "package_dir",
-        default=".",
+        metavar="PACKAGE",
+        default=Path("."),
+        type=Path,
         nargs="?",
         help="""
-            Path to the package that you want wheels for. Must be a subdirectory of
-            the working directory. When set, the working directory is still
-            considered the 'project' and is copied into the Docker container on
-            Linux. Default: the working directory.
+            Path to the package that you want wheels for. Default: the working
+            directory. Can be a directory inside the working directory, or an
+            sdist. When set to a directory, the working directory is still
+            considered the 'project' and is copied into the build container
+            on Linux.  When set to a tar.gz sdist file, --config-file
+            and --output-dir are relative to the current directory, and other
+            paths are relative to the expanded SDist directory.
         """,
     )
 
@@ -107,7 +116,39 @@ def main() -> None:
         help="Enable pre-release Python versions if available.",
     )
 
-    args = parser.parse_args(namespace=CommandLineArguments())
+    args = CommandLineArguments(**vars(parser.parse_args()))
+
+    args.package_dir = args.package_dir.resolve()
+
+    # This are always relative to the base directory, even in SDist builds
+    args.output_dir = args.output_dir.resolve()
+
+    # Standard builds if a directory or non-existent path is given
+    if not args.package_dir.is_file() and not args.package_dir.name.endswith("tar.gz"):
+        build_in_directory(args)
+        return
+
+    # Tarfile builds require extraction and changing the directory
+    with tempfile.TemporaryDirectory(prefix="cibw-sdist-") as temp_dir_str:
+        temp_dir = Path(temp_dir_str)
+        with tarfile.open(args.package_dir) as tar:
+            tar.extractall(path=temp_dir)
+
+        # The extract directory is now the project dir
+        try:
+            (project_dir,) = temp_dir.iterdir()
+        except ValueError:
+            raise SystemExit("invalid sdist: didn't contain a single dir") from None
+
+        # This is now the new package dir
+        args.package_dir = project_dir.resolve()
+
+        with chdir(temp_dir):
+            build_in_directory(args)
+
+
+def build_in_directory(args: CommandLineArguments) -> None:
+    platform: PlatformName
 
     if args.platform != "auto":
         platform = args.platform
@@ -167,7 +208,6 @@ def main() -> None:
         sys.exit(0)
 
     # Add CIBUILDWHEEL environment variable
-    # This needs to be passed on to the docker container in linux.py
     os.environ["CIBUILDWHEEL"] = "1"
 
     # Python is buffering by default when running on the CI platforms, giving problems interleaving subprocess call output with unflushed calls to 'print'

cibuildwheel/architecture.py

@@ -59,7 +59,7 @@ class Architecture(Enum):
         result = {native_architecture}
 
         if platform == "linux" and native_architecture == Architecture.x86_64:
-            # x86_64 machines can run i686 docker containers
+            # x86_64 machines can run i686 containers
             result.add(Architecture.i686)
 
         if platform == "windows" and native_architecture == Architecture.AMD64:

cibuildwheel/bashlex_eval.py

@@ -1,5 +1,6 @@
 import subprocess
-from typing import Callable, Dict, List, NamedTuple, Optional, Sequence
+from dataclasses import dataclass
+from typing import Callable, Dict, List, Optional, Sequence
 
 import bashlex
 
@@ -13,7 +14,8 @@ def local_environment_executor(command: List[str], env: Dict[str, str]) -> str:
     ).stdout
 
 
-class NodeExecutionContext(NamedTuple):
+@dataclass(frozen=True)
+class NodeExecutionContext:
     environment: Dict[str, str]
     input: str
     executor: EnvironmentExecutor

cibuildwheel/environment.py

@@ -51,7 +51,6 @@ class EnvironmentAssignment(Protocol):
         executor: Optional[bashlex_eval.EnvironmentExecutor] = None,
     ) -> str:
         """Returns the value of this assignment, as evaluated in the environment"""
-        ...
 
 
 class EnvironmentAssignmentRaw:

cibuildwheel/linux.py

@@ -1,37 +1,43 @@
 import subprocess
 import sys
 import textwrap
-from pathlib import Path, PurePath
-from typing import Iterator, List, NamedTuple, Set, Tuple
+from dataclasses import dataclass
+from pathlib import Path, PurePath, PurePosixPath
+from typing import Iterator, List, Set, Tuple
 
 from .architecture import Architecture
-from .docker_container import DockerContainer
 from .logger import log
+from .oci_container import OCIContainer
 from .options import Options
 from .typing import OrderedDict, PathOrStr, assert_never
 from .util import (
+    AlreadyBuiltWheelError,
     BuildSelector,
     NonPlatformWheelError,
+    find_compatible_wheel,
     get_build_verbosity_extra_flags,
     prepare_command,
     read_python_configs,
+    unwrap,
 )
 
 
-class PythonConfiguration(NamedTuple):
+@dataclass(frozen=True)
+class PythonConfiguration:
     version: str
     identifier: str
     path_str: str
 
     @property
-    def path(self) -> PurePath:
-        return PurePath(self.path_str)
+    def path(self) -> PurePosixPath:
+        return PurePosixPath(self.path_str)
 
 
-class BuildStep(NamedTuple):
+@dataclass(frozen=True)
+class BuildStep:
     platform_configs: List[PythonConfiguration]
     platform_tag: str
-    docker_image: str
+    container_image: str
 
 
 def get_python_configurations(
@@ -53,7 +59,7 @@ def get_python_configurations(
     ]
 
 
-def docker_image_for_python_configuration(config: PythonConfiguration, options: Options) -> str:
+def container_image_for_python_configuration(config: PythonConfiguration, options: Options) -> str:
     build_options = options.build_options(config.identifier)
     # e.g
     # identifier is 'cp310-manylinux_x86_64'
@@ -77,7 +83,7 @@ def get_build_steps(
 ) -> Iterator[BuildStep]:
     """
     Groups PythonConfigurations into BuildSteps. Each BuildStep represents a
-    separate Docker container.
+    separate container instance.
     """
     steps = OrderedDict[Tuple[str, str, str], BuildStep]()
 
@@ -85,32 +91,34 @@ def get_build_steps(
         _, platform_tag = config.identifier.split("-", 1)
 
         before_all = options.build_options(config.identifier).before_all
-        docker_image = docker_image_for_python_configuration(config, options)
+        container_image = container_image_for_python_configuration(config, options)
 
-        step_key = (platform_tag, docker_image, before_all)
+        step_key = (platform_tag, container_image, before_all)
 
         if step_key in steps:
             steps[step_key].platform_configs.append(config)
         else:
             steps[step_key] = BuildStep(
-                platform_configs=[config], platform_tag=platform_tag, docker_image=docker_image
+                platform_configs=[config],
+                platform_tag=platform_tag,
+                container_image=container_image,
             )
 
     yield from steps.values()
 
 
-def build_on_docker(
+def build_in_container(
     *,
     options: Options,
     platform_configs: List[PythonConfiguration],
-    docker: DockerContainer,
+    container: OCIContainer,
     container_project_path: PurePath,
     container_package_dir: PurePath,
 ) -> None:
-    container_output_dir = PurePath("/output")
+    container_output_dir = PurePosixPath("/output")
 
-    log.step("Copying project into Docker...")
-    docker.copy_into(Path.cwd(), container_project_path)
+    log.step("Copying project into container...")
+    container.copy_into(Path.cwd(), container_project_path)
 
     before_all_options_identifier = platform_configs[0].identifier
     before_all_options = options.build_options(before_all_options_identifier)
@@ -118,11 +126,11 @@ def build_on_docker(
     if before_all_options.before_all:
         log.step("Running before_all...")
 
-        env = docker.get_environment()
+        env = container.get_environment()
         env["PATH"] = f'/opt/python/cp38-cp38/bin:{env["PATH"]}'
         env["PIP_DISABLE_PIP_VERSION_CHECK"] = "1"
         env = before_all_options.environment.as_dictionary(
-            env, executor=docker.environment_executor
+            env, executor=container.environment_executor
         )
 
         before_all_prepared = prepare_command(
@@ -130,7 +138,9 @@ def build_on_docker(
             project=container_project_path,
             package=container_package_dir,
         )
-        docker.call(["sh", "-c", before_all_prepared], env=env)
+        container.call(["sh", "-c", before_all_prepared], env=env)
+
+    built_wheels: List[PurePosixPath] = []
 
     for config in platform_configs:
         log.build_start(config.identifier)
@@ -144,114 +154,129 @@ def build_on_docker(
             )
             container_constraints_file = PurePath("/constraints.txt")
 
-            docker.copy_into(constraints_file, container_constraints_file)
+            container.copy_into(constraints_file, container_constraints_file)
             dependency_constraint_flags = ["-c", container_constraints_file]
 
         log.step("Setting up build environment...")
 
-        env = docker.get_environment()
+        env = container.get_environment()
 
         # put this config's python top of the list
         python_bin = config.path / "bin"
         env["PATH"] = f'{python_bin}:{env["PATH"]}'
 
-        env = build_options.environment.as_dictionary(env, executor=docker.environment_executor)
+        env = build_options.environment.as_dictionary(env, executor=container.environment_executor)
 
         # check config python is still on PATH
-        which_python = docker.call(["which", "python"], env=env, capture_output=True).strip()
-        if PurePath(which_python) != python_bin / "python":
+        which_python = container.call(["which", "python"], env=env, capture_output=True).strip()
+        if PurePosixPath(which_python) != python_bin / "python":
             print(
                 "cibuildwheel: python available on PATH doesn't match our installed instance. If you have modified PATH, ensure that you don't overwrite cibuildwheel's entry or insert python above it.",
                 file=sys.stderr,
             )
             sys.exit(1)
 
-        which_pip = docker.call(["which", "pip"], env=env, capture_output=True).strip()
-        if PurePath(which_pip) != python_bin / "pip":
+        which_pip = container.call(["which", "pip"], env=env, capture_output=True).strip()
+        if PurePosixPath(which_pip) != python_bin / "pip":
             print(
                 "cibuildwheel: pip available on PATH doesn't match our installed instance. If you have modified PATH, ensure that you don't overwrite cibuildwheel's entry or insert pip above it.",
                 file=sys.stderr,
             )
             sys.exit(1)
 
-        if build_options.before_build:
-            log.step("Running before_build...")
-            before_build_prepared = prepare_command(
-                build_options.before_build,
-                project=container_project_path,
-                package=container_package_dir,
-            )
-            docker.call(["sh", "-c", before_build_prepared], env=env)
-
-        log.step("Building wheel...")
-
-        temp_dir = PurePath("/tmp/cibuildwheel")
-        built_wheel_dir = temp_dir / "built_wheel"
-        docker.call(["rm", "-rf", built_wheel_dir])
-        docker.call(["mkdir", "-p", built_wheel_dir])
-
-        verbosity_flags = get_build_verbosity_extra_flags(build_options.build_verbosity)
-
-        if build_options.build_frontend == "pip":
-            docker.call(
-                [
-                    "python",
-                    "-m",
-                    "pip",
-                    "wheel",
-                    container_package_dir,
-                    f"--wheel-dir={built_wheel_dir}",
-                    "--no-deps",
-                    *verbosity_flags,
-                ],
-                env=env,
-            )
-        elif build_options.build_frontend == "build":
-            config_setting = " ".join(verbosity_flags)
-            docker.call(
-                [
-                    "python",
-                    "-m",
-                    "build",
-                    container_package_dir,
-                    "--wheel",
-                    f"--outdir={built_wheel_dir}",
-                    f"--config-setting={config_setting}",
-                ],
-                env=env,
+        compatible_wheel = find_compatible_wheel(built_wheels, config.identifier)
+        if compatible_wheel:
+            log.step_end()
+            print(
+                f"\nFound previously built wheel {compatible_wheel.name}, that's compatible with {config.identifier}. Skipping build step..."
             )
+            repaired_wheels = [compatible_wheel]
         else:
-            assert_never(build_options.build_frontend)
 
-        built_wheel = docker.glob(built_wheel_dir, "*.whl")[0]
+            if build_options.before_build:
+                log.step("Running before_build...")
+                before_build_prepared = prepare_command(
+                    build_options.before_build,
+                    project=container_project_path,
+                    package=container_package_dir,
+                )
+                container.call(["sh", "-c", before_build_prepared], env=env)
 
-        repaired_wheel_dir = temp_dir / "repaired_wheel"
-        docker.call(["rm", "-rf", repaired_wheel_dir])
-        docker.call(["mkdir", "-p", repaired_wheel_dir])
+            log.step("Building wheel...")
 
-        if built_wheel.name.endswith("none-any.whl"):
-            raise NonPlatformWheelError()
+            temp_dir = PurePosixPath("/tmp/cibuildwheel")
+            built_wheel_dir = temp_dir / "built_wheel"
+            container.call(["rm", "-rf", built_wheel_dir])
+            container.call(["mkdir", "-p", built_wheel_dir])
 
-        if build_options.repair_command:
-            log.step("Repairing wheel...")
-            repair_command_prepared = prepare_command(
-                build_options.repair_command, wheel=built_wheel, dest_dir=repaired_wheel_dir
-            )
-            docker.call(["sh", "-c", repair_command_prepared], env=env)
-        else:
-            docker.call(["mv", built_wheel, repaired_wheel_dir])
+            verbosity_flags = get_build_verbosity_extra_flags(build_options.build_verbosity)
 
-        repaired_wheels = docker.glob(repaired_wheel_dir, "*.whl")
+            if build_options.build_frontend == "pip":
+                container.call(
+                    [
+                        "python",
+                        "-m",
+                        "pip",
+                        "wheel",
+                        container_package_dir,
+                        f"--wheel-dir={built_wheel_dir}",
+                        "--no-deps",
+                        *verbosity_flags,
+                    ],
+                    env=env,
+                )
+            elif build_options.build_frontend == "build":
+                config_setting = " ".join(verbosity_flags)
+                container.call(
+                    [
+                        "python",
+                        "-m",
+                        "build",
+                        container_package_dir,
+                        "--wheel",
+                        f"--outdir={built_wheel_dir}",
+                        f"--config-setting={config_setting}",
+                    ],
+                    env=env,
+                )
+            else:
+                assert_never(build_options.build_frontend)
+
+            built_wheel = container.glob(built_wheel_dir, "*.whl")[0]
+
+            repaired_wheel_dir = temp_dir / "repaired_wheel"
+            container.call(["rm", "-rf", repaired_wheel_dir])
+            container.call(["mkdir", "-p", repaired_wheel_dir])
+
+            if built_wheel.name.endswith("none-any.whl"):
+                raise NonPlatformWheelError()
+
+            if build_options.repair_command:
+                log.step("Repairing wheel...")
+                repair_command_prepared = prepare_command(
+                    build_options.repair_command, wheel=built_wheel, dest_dir=repaired_wheel_dir
+                )
+                container.call(["sh", "-c", repair_command_prepared], env=env)
+            else:
+                container.call(["mv", built_wheel, repaired_wheel_dir])
+
+            repaired_wheels = container.glob(repaired_wheel_dir, "*.whl")
+
+            for repaired_wheel in repaired_wheels:
+                if repaired_wheel.name in {wheel.name for wheel in built_wheels}:
+                    raise AlreadyBuiltWheelError(repaired_wheel.name)
 
         if build_options.test_command and build_options.test_selector(config.identifier):
             log.step("Testing wheel...")
 
             # set up a virtual environment to install and test from, to make sure
             # there are no dependencies that were pulled in at build time.
-            docker.call(["pip", "install", "virtualenv", *dependency_constraint_flags], env=env)
-            venv_dir = PurePath(docker.call(["mktemp", "-d"], capture_output=True).strip()) / "venv"
+            container.call(["pip", "install", "virtualenv", *dependency_constraint_flags], env=env)
+            venv_dir = (
+                PurePath(container.call(["mktemp", "-d"], capture_output=True).strip()) / "venv"
+            )
 
-            docker.call(["python", "-m", "virtualenv", "--no-download", venv_dir], env=env)
+            container.call(["python", "-m", "virtualenv", "--no-download", venv_dir], env=env)
 
             virtualenv_env = env.copy()
             virtualenv_env["PATH"] = f"{venv_dir / 'bin'}:{virtualenv_env['PATH']}"
@@ -262,7 +287,7 @@ def build_on_docker(
                     project=container_project_path,
                     package=container_package_dir,
                 )
-                docker.call(["sh", "-c", before_test_prepared], env=virtualenv_env)
+                container.call(["sh", "-c", before_test_prepared], env=virtualenv_env)
 
             # Install the wheel we just built
             # Note: If auditwheel produced two wheels, it's because the earlier produced wheel
@@ -271,14 +296,14 @@ def build_on_docker(
             # different external shared libraries. so it doesn't matter which one we run the tests on.
             # Let's just pick the first one.
             wheel_to_test = repaired_wheels[0]
-            docker.call(
+            container.call(
                 ["pip", "install", str(wheel_to_test) + build_options.test_extras],
                 env=virtualenv_env,
             )
 
             # Install any requirements to run the tests
             if build_options.test_requires:
-                docker.call(["pip", "install", *build_options.test_requires], env=virtualenv_env)
+                container.call(["pip", "install", *build_options.test_requires], env=virtualenv_env)
 
             # Run the tests from a different directory
             test_command_prepared = prepare_command(
@@ -286,32 +311,44 @@ def build_on_docker(
                 project=container_project_path,
                 package=container_package_dir,
             )
-            docker.call(["sh", "-c", test_command_prepared], cwd="/root", env=virtualenv_env)
+            container.call(["sh", "-c", test_command_prepared], cwd="/root", env=virtualenv_env)
 
             # clean up test environment
-            docker.call(["rm", "-rf", venv_dir])
+            container.call(["rm", "-rf", venv_dir])
 
         # move repaired wheels to output
-        docker.call(["mkdir", "-p", container_output_dir])
-        docker.call(["mv", *repaired_wheels, container_output_dir])
+        if compatible_wheel is None:
+            container.call(["mkdir", "-p", container_output_dir])
+            container.call(["mv", *repaired_wheels, container_output_dir])
+            built_wheels.extend(
+                container_output_dir / repaired_wheel.name for repaired_wheel in repaired_wheels
+            )
 
         log.build_end()
 
     log.step("Copying wheels back to host...")
     # copy the output back into the host
-    docker.copy_out(container_output_dir, options.globals.output_dir)
+    container.copy_out(container_output_dir, options.globals.output_dir)
     log.step_end()
 
 
 def build(options: Options, tmp_path: Path) -> None:  # pylint: disable=unused-argument
     try:
-        # check docker is installed
-        subprocess.run(["docker", "--version"], check=True, stdout=subprocess.DEVNULL)
+        # check the container engine is installed
+        subprocess.run(
+            [options.globals.container_engine, "--version"], check=True, stdout=subprocess.DEVNULL
+        )
     except subprocess.CalledProcessError:
         print(
-            "cibuildwheel: Docker not found. Docker is required to run Linux builds. "
-            "If you're building on Travis CI, add `services: [docker]` to your .travis.yml."
-            "If you're building on Circle CI in Linux, add a `setup_remote_docker` step to your .circleci/config.yml",
+            unwrap(
+                f"""
+                cibuildwheel: {options.globals.container_engine} not found. An
+                OCI exe like Docker or Podman is required to run Linux builds.
+                If you're building on Travis CI, add `services: [docker]` to
+                your .travis.yml. If you're building on Circle CI in Linux,
+                add a `setup_remote_docker` step to your .circleci/config.yml.
+                """
+            ),
             file=sys.stderr,
         )
         sys.exit(2)
@@ -325,26 +362,27 @@ def build(options: Options, tmp_path: Path) -> None:  # pylint: disable=unused-a
     if cwd != abs_package_dir and cwd not in abs_package_dir.parents:
         raise Exception("package_dir must be inside the working directory")
 
-    container_project_path = PurePath("/project")
+    container_project_path = PurePosixPath("/project")
     container_package_dir = container_project_path / abs_package_dir.relative_to(cwd)
 
     for build_step in get_build_steps(options, python_configurations):
         try:
             ids_to_build = [x.identifier for x in build_step.platform_configs]
-            log.step(
-                f"Starting Docker image {build_step.docker_image} for {', '.join(ids_to_build)}..."
-            )
+            log.step(f"Starting container image {build_step.container_image}...")
 
-            with DockerContainer(
-                docker_image=build_step.docker_image,
+            print(f"info: This container will host the build for {', '.join(ids_to_build)}...")
+
+            with OCIContainer(
+                image=build_step.container_image,
                 simulate_32_bit=build_step.platform_tag.endswith("i686"),
                 cwd=container_project_path,
-            ) as docker:
+                engine=options.globals.container_engine,
+            ) as container:
 
-                build_on_docker(
+                build_in_container(
                     options=options,
                     platform_configs=build_step.platform_configs,
-                    docker=docker,
+                    container=container,
                     container_project_path=container_project_path,
                     container_package_dir=container_package_dir,
                 )

cibuildwheel/macos.py

@@ -5,8 +5,9 @@ import re
 import shutil
 import subprocess
 import sys
+from dataclasses import dataclass
 from pathlib import Path
-from typing import Dict, List, NamedTuple, Sequence, Set, Tuple, cast
+from typing import Dict, List, Sequence, Set, Tuple, cast
 
 from filelock import FileLock
 
@@ -17,12 +18,14 @@ from .options import Options
 from .typing import Literal, PathOrStr, assert_never
 from .util import (
     CIBW_CACHE_PATH,
+    AlreadyBuiltWheelError,
     BuildFrontend,
     BuildSelector,
     NonPlatformWheelError,
     call,
     detect_ci_provider,
     download,
+    find_compatible_wheel,
     get_build_verbosity_extra_flags,
     get_pip_version,
     install_certifi_script,
@@ -53,7 +56,8 @@ def get_macos_sdks() -> List[str]:
     return [m.group(1) for m in re.finditer(r"-sdk (macosx\S+)", output)]
 
 
-class PythonConfiguration(NamedTuple):
+@dataclass(frozen=True)
+class PythonConfiguration:
     version: str
     identifier: str
     url: str
@@ -275,6 +279,9 @@ def build(options: Options, tmp_path: Path) -> None:
         options.globals.build_selector, options.globals.architectures
     )
 
+    if len(python_configurations) == 0:
+        return
+
     try:
         before_all_options_identifier = python_configurations[0].identifier
         before_all_options = options.build_options(before_all_options_identifier)
@@ -288,6 +295,8 @@ def build(options: Options, tmp_path: Path) -> None:
             )
             shell(before_all_prepared, env=env)
 
+        built_wheels: List[Path] = []
+
         for config in python_configurations:
             build_options = options.build_options(config.identifier)
             log.build_start(config.identifier)
@@ -315,84 +324,97 @@ def build(options: Options, tmp_path: Path) -> None:
                 build_options.build_frontend,
             )
 
-            if build_options.before_build:
-                log.step("Running before_build...")
-                before_build_prepared = prepare_command(
-                    build_options.before_build, project=".", package=build_options.package_dir
+            compatible_wheel = find_compatible_wheel(built_wheels, config.identifier)
+            if compatible_wheel:
+                log.step_end()
+                print(
+                    f"\nFound previously built wheel {compatible_wheel.name}, that's compatible with {config.identifier}. Skipping build step..."
                 )
-                shell(before_build_prepared, env=env)
-
-            log.step("Building wheel...")
-            built_wheel_dir.mkdir()
-
-            verbosity_flags = get_build_verbosity_extra_flags(build_options.build_verbosity)
-
-            if build_options.build_frontend == "pip":
-                # Path.resolve() is needed. Without it pip wheel may try to fetch package from pypi.org
-                # see https://github.com/pypa/cibuildwheel/pull/369
-                call(
-                    "python",
-                    "-m",
-                    "pip",
-                    "wheel",
-                    build_options.package_dir.resolve(),
-                    f"--wheel-dir={built_wheel_dir}",
-                    "--no-deps",
-                    *verbosity_flags,
-                    env=env,
-                )
-            elif build_options.build_frontend == "build":
-                config_setting = " ".join(verbosity_flags)
-                build_env = env.copy()
-                if build_options.dependency_constraints:
-                    constraint_path = build_options.dependency_constraints.get_for_python_version(
-                        config.version
+                repaired_wheel = compatible_wheel
+            else:
+                if build_options.before_build:
+                    log.step("Running before_build...")
+                    before_build_prepared = prepare_command(
+                        build_options.before_build, project=".", package=build_options.package_dir
                     )
-                    build_env["PIP_CONSTRAINT"] = constraint_path.as_uri()
-                build_env["VIRTUALENV_PIP"] = get_pip_version(env)
-                call(
-                    "python",
-                    "-m",
-                    "build",
-                    build_options.package_dir,
-                    "--wheel",
-                    f"--outdir={built_wheel_dir}",
-                    f"--config-setting={config_setting}",
-                    env=build_env,
-                )
-            else:
-                assert_never(build_options.build_frontend)
+                    shell(before_build_prepared, env=env)
 
-            built_wheel = next(built_wheel_dir.glob("*.whl"))
+                log.step("Building wheel...")
+                built_wheel_dir.mkdir()
 
-            repaired_wheel_dir.mkdir()
+                verbosity_flags = get_build_verbosity_extra_flags(build_options.build_verbosity)
 
-            if built_wheel.name.endswith("none-any.whl"):
-                raise NonPlatformWheelError()
-
-            if build_options.repair_command:
-                log.step("Repairing wheel...")
-
-                if config_is_universal2:
-                    delocate_archs = "x86_64,arm64"
-                elif config_is_arm64:
-                    delocate_archs = "arm64"
+                if build_options.build_frontend == "pip":
+                    # Path.resolve() is needed. Without it pip wheel may try to fetch package from pypi.org
+                    # see https://github.com/pypa/cibuildwheel/pull/369
+                    call(
+                        "python",
+                        "-m",
+                        "pip",
+                        "wheel",
+                        build_options.package_dir.resolve(),
+                        f"--wheel-dir={built_wheel_dir}",
+                        "--no-deps",
+                        *verbosity_flags,
+                        env=env,
+                    )
+                elif build_options.build_frontend == "build":
+                    config_setting = " ".join(verbosity_flags)
+                    build_env = env.copy()
+                    if build_options.dependency_constraints:
+                        constraint_path = (
+                            build_options.dependency_constraints.get_for_python_version(
+                                config.version
+                            )
+                        )
+                        build_env["PIP_CONSTRAINT"] = constraint_path.as_uri()
+                    build_env["VIRTUALENV_PIP"] = get_pip_version(env)
+                    call(
+                        "python",
+                        "-m",
+                        "build",
+                        build_options.package_dir,
+                        "--wheel",
+                        f"--outdir={built_wheel_dir}",
+                        f"--config-setting={config_setting}",
+                        env=build_env,
+                    )
                 else:
-                    delocate_archs = "x86_64"
+                    assert_never(build_options.build_frontend)
 
-                repair_command_prepared = prepare_command(
-                    build_options.repair_command,
-                    wheel=built_wheel,
-                    dest_dir=repaired_wheel_dir,
-                    delocate_archs=delocate_archs,
-                )
-                shell(repair_command_prepared, env=env)
-            else:
-                shutil.move(str(built_wheel), repaired_wheel_dir)
+                built_wheel = next(built_wheel_dir.glob("*.whl"))
 
-            repaired_wheel = next(repaired_wheel_dir.glob("*.whl"))
+                repaired_wheel_dir.mkdir()
 
-            log.step_end()
+                if built_wheel.name.endswith("none-any.whl"):
+                    raise NonPlatformWheelError()
+
+                if build_options.repair_command:
+                    log.step("Repairing wheel...")
+
+                    if config_is_universal2:
+                        delocate_archs = "x86_64,arm64"
+                    elif config_is_arm64:
+                        delocate_archs = "arm64"
+                    else:
+                        delocate_archs = "x86_64"
+
+                    repair_command_prepared = prepare_command(
+                        build_options.repair_command,
+                        wheel=built_wheel,
+                        dest_dir=repaired_wheel_dir,
+                        delocate_archs=delocate_archs,
+                    )
+                    shell(repair_command_prepared, env=env)
+                else:
+                    shutil.move(str(built_wheel), repaired_wheel_dir)
+
+                repaired_wheel = next(repaired_wheel_dir.glob("*.whl"))
+
+                if repaired_wheel.name in {wheel.name for wheel in built_wheels}:
+                    raise AlreadyBuiltWheelError(repaired_wheel.name)
+
+                log.step_end()
 
             if build_options.test_command and build_options.test_selector(config.identifier):
                 machine_arch = platform.machine()
@@ -443,6 +465,23 @@ def build(options: Options, tmp_path: Path) -> None:
                         # skip this test
                         continue
 
+                    if testing_arch == "arm64" and config.identifier.startswith("cp38-"):
+                        log.warning(
+                            unwrap(
+                                """
+                                While cibuildwheel can build CPython 3.8 universal2/arm64 wheels, we
+                                cannot test the arm64 part of them, even when running on an Apple
+                                Silicon machine. This is because we use the x86_64 installer of
+                                CPython 3.8. See the discussion in
+                                https://github.com/pypa/cibuildwheel/pull/1169 for the details. To
+                                silence this warning, set `CIBW_TEST_SKIP: cp38-macosx_*:arm64`.
+                                """
+                            )
+                        )
+
+                        # skip this test
+                        continue
+
                     log.step(
                         "Testing wheel..."
                         if testing_arch == machine_arch
@@ -518,7 +557,14 @@ def build(options: Options, tmp_path: Path) -> None:
                     )
 
             # we're all done here; move it to output (overwrite existing)
-            shutil.move(str(repaired_wheel), build_options.output_dir)
+            if compatible_wheel is None:
+                try:
+                    (build_options.output_dir / repaired_wheel.name).unlink()
+                except FileNotFoundError:
+                    pass
+
+                shutil.move(str(repaired_wheel), build_options.output_dir)
+                built_wheels.append(build_options.output_dir / repaired_wheel.name)
 
             # clean up
             shutil.rmtree(identifier_tmp_dir)

cibuildwheel/oci_container.py

@@ -3,28 +3,42 @@ import json
 import os
 import platform
 import shlex
+import shutil
 import subprocess
 import sys
 import uuid
-from pathlib import Path, PurePath
+from pathlib import Path, PurePath, PurePosixPath
 from types import TracebackType
 from typing import IO, Dict, List, Optional, Sequence, Type, cast
 
 from cibuildwheel.util import CIProvider, detect_ci_provider
 
-from .typing import PathOrStr, PopenBytes
+from .typing import Literal, PathOrStr, PopenBytes
+
+ContainerEngine = Literal["docker", "podman"]
 
 
-class DockerContainer:
+class OCIContainer:
     """
-    An object that represents a running Docker container.
+    An object that represents a running OCI (e.g. Docker) container.
 
     Intended for use as a context manager e.g.
-    `with DockerContainer(docker_image = 'ubuntu') as docker:`
+    `with OCIContainer(image = 'ubuntu') as docker:`
 
     A bash shell is running in the remote container. When `call()` is invoked,
     the command is relayed to the remote shell, and the results are streamed
     back to cibuildwheel.
+
+    Example:
+        >>> from cibuildwheel.oci_container import *  # NOQA
+        >>> from cibuildwheel.options import _get_pinned_container_images
+        >>> image = _get_pinned_container_images()['x86_64']['manylinux2014']
+        >>> # Test the default container
+        >>> with OCIContainer(image=image) as self:
+        ...     self.call(["echo", "hello world"])
+        ...     self.call(["cat", "/proc/1/cgroup"])
+        ...     print(self.get_environment())
+        ...     print(self.debug_info())
     """
 
     UTILITY_PYTHON = "/opt/python/cp38-cp38/bin/python"
@@ -34,19 +48,25 @@ class DockerContainer:
     bash_stdout: IO[bytes]
 
     def __init__(
-        self, *, docker_image: str, simulate_32_bit: bool = False, cwd: Optional[PathOrStr] = None
+        self,
+        *,
+        image: str,
+        simulate_32_bit: bool = False,
+        cwd: Optional[PathOrStr] = None,
+        engine: ContainerEngine = "docker",
     ):
-        if not docker_image:
-            raise ValueError("Must have a non-empty docker image to run.")
+        if not image:
+            raise ValueError("Must have a non-empty image to run.")
 
-        self.docker_image = docker_image
+        self.image = image
         self.simulate_32_bit = simulate_32_bit
         self.cwd = cwd
         self.name: Optional[str] = None
+        self.engine = engine
+
+    def __enter__(self) -> "OCIContainer":
 
-    def __enter__(self) -> "DockerContainer":
         self.name = f"cibuildwheel-{uuid.uuid4()}"
-        cwd_args = ["-w", str(self.cwd)] if self.cwd else []
 
         # work-around for Travis-CI PPC64le Docker runs since 2021:
         # this avoids network splits
@@ -57,24 +77,25 @@ class DockerContainer:
             network_args = ["--network=host"]
 
         shell_args = ["linux32", "/bin/bash"] if self.simulate_32_bit else ["/bin/bash"]
+
         subprocess.run(
             [
-                "docker",
+                self.engine,
                 "create",
                 "--env=CIBUILDWHEEL",
                 f"--name={self.name}",
                 "--interactive",
                 "--volume=/:/host",  # ignored on CircleCI
                 *network_args,
-                *cwd_args,
-                self.docker_image,
+                self.image,
                 *shell_args,
             ],
             check=True,
         )
+
         self.process = subprocess.Popen(
             [
-                "docker",
+                self.engine,
                 "start",
                 "--attach",
                 "--interactive",
@@ -89,7 +110,13 @@ class DockerContainer:
         self.bash_stdout = self.process.stdout
 
         # run a noop command to block until the container is responding
-        self.call(["/bin/true"])
+        self.call(["/bin/true"], cwd="/")
+
+        if self.cwd:
+            # Although `docker create -w` does create the working dir if it
+            # does not exist, podman does not. There does not seem to be a way
+            # to setup a workdir for a container running in podman.
+            self.call(["mkdir", "-p", os.fspath(self.cwd)], cwd="/")
 
         return self
 
@@ -106,10 +133,19 @@ class DockerContainer:
         self.bash_stdin.close()
         self.bash_stdout.close()
 
+        if self.engine == "podman":
+            # This works around what seems to be a race condition in the podman
+            # backend. The full reason is not understood. See PR #966 for a
+            # discussion on possible causes and attempts to remove this line.
+            # For now, this seems to work "well enough".
+            self.process.wait()
+
         assert isinstance(self.name, str)
 
         subprocess.run(
-            ["docker", "rm", "--force", "-v", self.name], stdout=subprocess.DEVNULL, check=False
+            [self.engine, "rm", "--force", "-v", self.name],
+            stdout=subprocess.DEVNULL,
+            check=False,
         )
         self.name = None
 
@@ -122,44 +158,80 @@ class DockerContainer:
         if from_path.is_dir():
             self.call(["mkdir", "-p", to_path])
             subprocess.run(
-                f"tar cf - . | docker exec -i {self.name} tar -xC {shell_quote(to_path)} -f -",
+                f"tar cf - . | {self.engine} exec -i {self.name} tar --no-same-owner -xC {shell_quote(to_path)} -f -",
                 shell=True,
                 check=True,
                 cwd=from_path,
             )
         else:
-            subprocess.run(
-                f'cat {shell_quote(from_path)} | docker exec -i {self.name} sh -c "cat > {shell_quote(to_path)}"',
-                shell=True,
-                check=True,
-            )
+            with subprocess.Popen(
+                [
+                    self.engine,
+                    "exec",
+                    "-i",
+                    str(self.name),
+                    "sh",
+                    "-c",
+                    f"cat > {shell_quote(to_path)}",
+                ],
+                stdin=subprocess.PIPE,
+            ) as exec_process:
+                exec_process.stdin = cast(IO[bytes], exec_process.stdin)
+
+                with open(from_path, "rb") as from_file:
+                    shutil.copyfileobj(from_file, exec_process.stdin)
+
+                exec_process.stdin.close()
+                exec_process.wait()
+
+                if exec_process.returncode:
+                    raise subprocess.CalledProcessError(
+                        exec_process.returncode, exec_process.args, None, None
+                    )
 
     def copy_out(self, from_path: PurePath, to_path: Path) -> None:
         # note: we assume from_path is a dir
         to_path.mkdir(parents=True, exist_ok=True)
 
-        subprocess.run(
-            f"docker exec -i {self.name} tar -cC {shell_quote(from_path)} -f - . | tar -xf -",
-            shell=True,
-            check=True,
-            cwd=to_path,
-        )
+        if self.engine == "podman":
+            subprocess.run(
+                [
+                    self.engine,
+                    "cp",
+                    f"{self.name}:{from_path}/.",
+                    str(to_path),
+                ],
+                check=True,
+                cwd=to_path,
+            )
+        elif self.engine == "docker":
+            # There is a bug in docker that prevents a simple 'cp' invocation
+            # from working https://github.com/moby/moby/issues/38995
+            command = f"{self.engine} exec -i {self.name} tar -cC {shell_quote(from_path)} -f - . | tar -xf -"
+            subprocess.run(
+                command,
+                shell=True,
+                check=True,
+                cwd=to_path,
+            )
+        else:
+            raise KeyError(self.engine)
 
-    def glob(self, path: PurePath, pattern: str) -> List[PurePath]:
-        glob_pattern = os.path.join(str(path), pattern)
+    def glob(self, path: PurePosixPath, pattern: str) -> List[PurePosixPath]:
+        glob_pattern = path.joinpath(pattern)
 
         path_strings = json.loads(
             self.call(
                 [
                     self.UTILITY_PYTHON,
                     "-c",
-                    f"import sys, json, glob; json.dump(glob.glob({glob_pattern!r}), sys.stdout)",
+                    f"import sys, json, glob; json.dump(glob.glob({str(glob_pattern)!r}), sys.stdout)",
                 ],
                 capture_output=True,
             )
         )
 
-        return [PurePath(p) for p in path_strings]
+        return [PurePosixPath(p) for p in path_strings]
 
     def call(
         self,
@@ -169,6 +241,11 @@ class DockerContainer:
         cwd: Optional[PathOrStr] = None,
     ) -> str:
 
+        if cwd is None:
+            # Podman does not start the a container in a specific working dir
+            # so we always need to specify it when making calls.
+            cwd = self.cwd
+
         chdir = f"cd {cwd}" if cwd else ""
         env_assignments = (
             " ".join(f"{shlex.quote(k)}={shlex.quote(v)}" for k, v in env.items())
@@ -254,6 +331,22 @@ class DockerContainer:
         # used as an EnvironmentExecutor to evaluate commands and capture output
         return self.call(command, env=environment, capture_output=True)
 
+    def debug_info(self) -> str:
+        if self.engine == "podman":
+            command = f"{self.engine} info --debug"
+        else:
+            command = f"{self.engine} info"
+        completed = subprocess.run(
+            command,
+            shell=True,
+            check=True,
+            cwd=self.cwd,
+            stdin=subprocess.PIPE,
+            stdout=subprocess.PIPE,
+        )
+        output = str(completed.stdout, encoding="utf8", errors="surrogateescape")
+        return output
+
 
 def shell_quote(path: PurePath) -> str:
-    return shlex.quote(str(path))
+    return shlex.quote(os.fspath(path))

cibuildwheel/options.py

@@ -4,25 +4,31 @@ import sys
 import traceback
 from configparser import ConfigParser
 from contextlib import contextmanager
+from dataclasses import asdict, dataclass
 from pathlib import Path
 from typing import (
     Any,
     Dict,
-    Iterator,
+    Generator,
     List,
     Mapping,
-    NamedTuple,
     Optional,
     Set,
     Tuple,
     Union,
+    cast,
 )
 
-import tomli
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli as tomllib
+
 from packaging.specifiers import SpecifierSet
 
 from .architecture import Architecture
 from .environment import EnvironmentParseError, ParsedEnvironment, parse_environment
+from .oci_container import ContainerEngine
 from .projectfiles import get_requires_python_str
 from .typing import PLATFORMS, Literal, PlatformName, TypedDict
 from .util import (
@@ -33,6 +39,7 @@ from .util import (
     DependencyConstraints,
     TestSelector,
     cached_property,
+    format_safe,
     resources_dir,
     selector_matches,
     strtobool,
@@ -40,26 +47,30 @@ from .util import (
 )
 
 
+@dataclass
 class CommandLineArguments:
     platform: Literal["auto", "linux", "macos", "windows"]
     archs: Optional[str]
-    output_dir: Optional[str]
+    output_dir: Path
     config_file: str
-    package_dir: str
+    package_dir: Path
     print_build_identifiers: bool
     allow_empty: bool
     prerelease_pythons: bool
 
 
-class GlobalOptions(NamedTuple):
+@dataclass(frozen=True)
+class GlobalOptions:
     package_dir: Path
     output_dir: Path
     build_selector: BuildSelector
     test_selector: TestSelector
     architectures: Set[Architecture]
+    container_engine: ContainerEngine
 
 
-class BuildOptions(NamedTuple):
+@dataclass(frozen=True)
+class BuildOptions:
     globals: GlobalOptions
     environment: ParsedEnvironment
     before_all: str
@@ -99,7 +110,8 @@ class BuildOptions(NamedTuple):
 Setting = Union[Dict[str, str], List[str], str, int]
 
 
-class Override(NamedTuple):
+@dataclass(frozen=True)
+class Override:
     select_pattern: str
     options: Dict[str, Setting]
 
@@ -244,7 +256,7 @@ class OptionsReader:
         Load a toml file, returns global and platform as separate dicts.
         """
         with filename.open("rb") as f:
-            config = tomli.load(f)
+            config = tomllib.load(f)
 
         global_options = config.get("tool", {}).get("cibuildwheel", {})
         platform_options = global_options.get(self.platform, {})
@@ -260,7 +272,7 @@ class OptionsReader:
         ]
 
     @contextmanager
-    def identifier(self, identifier: Optional[str]) -> Iterator[None]:
+    def identifier(self, identifier: Optional[str]) -> Generator[None, None, None]:
         self.current_identifier = identifier
         try:
             yield
@@ -341,7 +353,7 @@ class Options:
         args = self.command_line_arguments
 
         if args.config_file:
-            return Path(args.config_file.format(package=args.package_dir))
+            return Path(format_safe(args.config_file, package=args.package_dir))
 
         # return pyproject.toml, if it's available
         pyproject_toml_path = Path(args.package_dir) / "pyproject.toml"
@@ -358,12 +370,8 @@ class Options:
     @property
     def globals(self) -> GlobalOptions:
         args = self.command_line_arguments
-        package_dir = Path(args.package_dir)
-        output_dir = Path(
-            args.output_dir
-            if args.output_dir is not None
-            else os.environ.get("CIBW_OUTPUT_DIR", "wheelhouse")
-        )
+        package_dir = args.package_dir
+        output_dir = args.output_dir
 
         build_config = self.reader.get("build", env_plat=False, sep=" ") or "*"
         skip_config = self.reader.get("skip", env_plat=False, sep=" ")
@@ -391,12 +399,22 @@ class Options:
         archs_config_str = args.archs or self.reader.get("archs", sep=" ")
         architectures = Architecture.parse_config(archs_config_str, platform=self.platform)
 
+        container_engine_str = self.reader.get("container-engine")
+
+        if container_engine_str not in ["docker", "podman"]:
+            msg = f"cibuildwheel: Unrecognised container_engine '{container_engine_str}', only 'docker' and 'podman' are supported"
+            print(msg, file=sys.stderr)
+            sys.exit(2)
+
+        container_engine = cast(ContainerEngine, container_engine_str)
+
         return GlobalOptions(
             package_dir=package_dir,
             output_dir=output_dir,
             build_selector=build_selector,
             test_selector=test_selector,
             architectures=architectures,
+            container_engine=container_engine,
         )
 
     def build_options(self, identifier: Optional[str]) -> BuildOptions:
@@ -471,10 +489,10 @@ class Options:
             manylinux_images: Dict[str, str] = {}
             musllinux_images: Dict[str, str] = {}
             if self.platform == "linux":
-                all_pinned_docker_images = _get_pinned_docker_images()
+                all_pinned_container_images = _get_pinned_container_images()
 
                 for build_platform in MANYLINUX_ARCHS:
-                    pinned_images = all_pinned_docker_images[build_platform]
+                    pinned_images = all_pinned_container_images[build_platform]
 
                     config_value = self.reader.get(
                         f"manylinux-{build_platform}-image", ignore_empty=True
@@ -491,7 +509,7 @@ class Options:
                     manylinux_images[build_platform] = image
 
                 for build_platform in MUSLLINUX_ARCHS:
-                    pinned_images = all_pinned_docker_images[build_platform]
+                    pinned_images = all_pinned_container_images[build_platform]
 
                     config_value = self.reader.get(f"musllinux-{build_platform}-image")
 
@@ -547,12 +565,12 @@ class Options:
     def summary(self, identifiers: List[str]) -> str:
         lines = [
             f"{option_name}: {option_value!r}"
-            for option_name, option_value in sorted(self.globals._asdict().items())
+            for option_name, option_value in sorted(asdict(self.globals).items())
         ]
 
         build_option_defaults = self.build_options(identifier=None)
 
-        for option_name, default_value in sorted(build_option_defaults._asdict().items()):
+        for option_name, default_value in sorted(asdict(build_option_defaults).items()):
             if option_name == "globals":
                 continue
 
@@ -560,7 +578,7 @@ class Options:
 
             # if any identifiers have an overridden value, print that too
             for identifier in identifiers:
-                option_value = self.build_options(identifier=identifier)._asdict()[option_name]
+                option_value = getattr(self.build_options(identifier=identifier), option_name)
                 if option_value != default_value:
                     lines.append(f"  {identifier}: {option_value!r}")
 
@@ -577,7 +595,7 @@ def compute_options(
 
 
 @functools.lru_cache(maxsize=None)
-def _get_pinned_docker_images() -> Mapping[str, Mapping[str, str]]:
+def _get_pinned_container_images() -> Mapping[str, Mapping[str, str]]:
     """
     This looks like a dict of dicts, e.g.
     { 'x86_64': {'manylinux1': '...', 'manylinux2010': '...', 'manylinux2014': '...'},
@@ -586,10 +604,10 @@ def _get_pinned_docker_images() -> Mapping[str, Mapping[str, str]]:
       ... }
     """
 
-    pinned_docker_images_file = resources_dir / "pinned_docker_images.cfg"
-    all_pinned_docker_images = ConfigParser()
-    all_pinned_docker_images.read(pinned_docker_images_file)
-    return all_pinned_docker_images
+    pinned_images_file = resources_dir / "pinned_docker_images.cfg"
+    all_pinned_images = ConfigParser()
+    all_pinned_images.read(pinned_images_file)
+    return all_pinned_images
 
 
 def deprecated_selectors(name: str, selector: str, *, error: bool = False) -> None:

cibuildwheel/projectfiles.py

@@ -4,7 +4,10 @@ from configparser import ConfigParser
 from pathlib import Path
 from typing import Any, Optional
 
-import tomli
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli as tomllib
 
 if sys.version_info < (3, 8):
     Constant = ast.Str
@@ -56,7 +59,7 @@ def get_requires_python_str(package_dir: Path) -> Optional[str]:
     # Read in from pyproject.toml:project.requires-python
     try:
         with (package_dir / "pyproject.toml").open("rb") as f1:
-            info = tomli.load(f1)
+            info = tomllib.load(f1)
         return str(info["project"]["requires-python"])
     except (FileNotFoundError, KeyError, IndexError, TypeError):
         pass

cibuildwheel/resources/build-platforms.toml

@@ -5,11 +5,13 @@ python_configurations = [
   { identifier = "cp38-manylinux_x86_64", version = "3.8", path_str = "/opt/python/cp38-cp38" },
   { identifier = "cp39-manylinux_x86_64", version = "3.9", path_str = "/opt/python/cp39-cp39" },
   { identifier = "cp310-manylinux_x86_64", version = "3.10", path_str = "/opt/python/cp310-cp310" },
+  { identifier = "cp311-manylinux_x86_64", version = "3.11", path_str = "/opt/python/cp311-cp311" },
   { identifier = "cp36-manylinux_i686", version = "3.6", path_str = "/opt/python/cp36-cp36m" },
   { identifier = "cp37-manylinux_i686", version = "3.7", path_str = "/opt/python/cp37-cp37m" },
   { identifier = "cp38-manylinux_i686", version = "3.8", path_str = "/opt/python/cp38-cp38" },
   { identifier = "cp39-manylinux_i686", version = "3.9", path_str = "/opt/python/cp39-cp39" },
   { identifier = "cp310-manylinux_i686", version = "3.10", path_str = "/opt/python/cp310-cp310" },
+  { identifier = "cp311-manylinux_i686", version = "3.11", path_str = "/opt/python/cp311-cp311" },
   { identifier = "pp37-manylinux_x86_64", version = "3.7", path_str = "/opt/python/pp37-pypy37_pp73" },
   { identifier = "pp38-manylinux_x86_64", version = "3.8", path_str = "/opt/python/pp38-pypy38_pp73" },
   { identifier = "pp39-manylinux_x86_64", version = "3.9", path_str = "/opt/python/pp39-pypy39_pp73" },
@@ -18,16 +20,19 @@ python_configurations = [
   { identifier = "cp38-manylinux_aarch64", version = "3.8", path_str = "/opt/python/cp38-cp38" },
   { identifier = "cp39-manylinux_aarch64", version = "3.9", path_str = "/opt/python/cp39-cp39" },
   { identifier = "cp310-manylinux_aarch64", version = "3.10", path_str = "/opt/python/cp310-cp310" },
+  { identifier = "cp311-manylinux_aarch64", version = "3.11", path_str = "/opt/python/cp311-cp311" },
   { identifier = "cp36-manylinux_ppc64le", version = "3.6", path_str = "/opt/python/cp36-cp36m" },
   { identifier = "cp37-manylinux_ppc64le", version = "3.7", path_str = "/opt/python/cp37-cp37m" },
   { identifier = "cp38-manylinux_ppc64le", version = "3.8", path_str = "/opt/python/cp38-cp38" },
   { identifier = "cp39-manylinux_ppc64le", version = "3.9", path_str = "/opt/python/cp39-cp39" },
   { identifier = "cp310-manylinux_ppc64le", version = "3.10", path_str = "/opt/python/cp310-cp310" },
+  { identifier = "cp311-manylinux_ppc64le", version = "3.11", path_str = "/opt/python/cp311-cp311" },
   { identifier = "cp36-manylinux_s390x", version = "3.6", path_str = "/opt/python/cp36-cp36m" },
   { identifier = "cp37-manylinux_s390x", version = "3.7", path_str = "/opt/python/cp37-cp37m" },
   { identifier = "cp38-manylinux_s390x", version = "3.8", path_str = "/opt/python/cp38-cp38" },
   { identifier = "cp39-manylinux_s390x", version = "3.9", path_str = "/opt/python/cp39-cp39" },
   { identifier = "cp310-manylinux_s390x", version = "3.10", path_str = "/opt/python/cp310-cp310" },
+  { identifier = "cp311-manylinux_s390x", version = "3.11", path_str = "/opt/python/cp311-cp311" },
   { identifier = "pp37-manylinux_aarch64", version = "3.7", path_str = "/opt/python/pp37-pypy37_pp73" },
   { identifier = "pp38-manylinux_aarch64", version = "3.8", path_str = "/opt/python/pp38-pypy38_pp73" },
   { identifier = "pp39-manylinux_aarch64", version = "3.9", path_str = "/opt/python/pp39-pypy39_pp73" },
@@ -39,26 +44,31 @@ python_configurations = [
   { identifier = "cp38-musllinux_x86_64", version = "3.8", path_str = "/opt/python/cp38-cp38" },
   { identifier = "cp39-musllinux_x86_64", version = "3.9", path_str = "/opt/python/cp39-cp39" },
   { identifier = "cp310-musllinux_x86_64", version = "3.10", path_str = "/opt/python/cp310-cp310" },
+  { identifier = "cp311-musllinux_x86_64", version = "3.11", path_str = "/opt/python/cp311-cp311" },
   { identifier = "cp36-musllinux_i686", version = "3.6", path_str = "/opt/python/cp36-cp36m" },
   { identifier = "cp37-musllinux_i686", version = "3.7", path_str = "/opt/python/cp37-cp37m" },
   { identifier = "cp38-musllinux_i686", version = "3.8", path_str = "/opt/python/cp38-cp38" },
   { identifier = "cp39-musllinux_i686", version = "3.9", path_str = "/opt/python/cp39-cp39" },
   { identifier = "cp310-musllinux_i686", version = "3.10", path_str = "/opt/python/cp310-cp310" },
+  { identifier = "cp311-musllinux_i686", version = "3.11", path_str = "/opt/python/cp311-cp311" },
   { identifier = "cp36-musllinux_aarch64", version = "3.6", path_str = "/opt/python/cp36-cp36m" },
   { identifier = "cp37-musllinux_aarch64", version = "3.7", path_str = "/opt/python/cp37-cp37m" },
   { identifier = "cp38-musllinux_aarch64", version = "3.8", path_str = "/opt/python/cp38-cp38" },
   { identifier = "cp39-musllinux_aarch64", version = "3.9", path_str = "/opt/python/cp39-cp39" },
   { identifier = "cp310-musllinux_aarch64", version = "3.10", path_str = "/opt/python/cp310-cp310" },
+  { identifier = "cp311-musllinux_aarch64", version = "3.11", path_str = "/opt/python/cp311-cp311" },
   { identifier = "cp36-musllinux_ppc64le", version = "3.6", path_str = "/opt/python/cp36-cp36m" },
   { identifier = "cp37-musllinux_ppc64le", version = "3.7", path_str = "/opt/python/cp37-cp37m" },
   { identifier = "cp38-musllinux_ppc64le", version = "3.8", path_str = "/opt/python/cp38-cp38" },
   { identifier = "cp39-musllinux_ppc64le", version = "3.9", path_str = "/opt/python/cp39-cp39" },
   { identifier = "cp310-musllinux_ppc64le", version = "3.10", path_str = "/opt/python/cp310-cp310" },
+  { identifier = "cp311-musllinux_ppc64le", version = "3.11", path_str = "/opt/python/cp311-cp311" },
   { identifier = "cp36-musllinux_s390x", version = "3.6", path_str = "/opt/python/cp36-cp36m" },
   { identifier = "cp37-musllinux_s390x", version = "3.7", path_str = "/opt/python/cp37-cp37m" },
   { identifier = "cp38-musllinux_s390x", version = "3.8", path_str = "/opt/python/cp38-cp38" },
   { identifier = "cp39-musllinux_s390x", version = "3.9", path_str = "/opt/python/cp39-cp39" },
   { identifier = "cp310-musllinux_s390x", version = "3.10", path_str = "/opt/python/cp310-cp310" },
+  { identifier = "cp311-musllinux_s390x", version = "3.11", path_str = "/opt/python/cp311-cp311" },
 ]
 
 [macos]
@@ -68,12 +78,15 @@ python_configurations = [
   { identifier = "cp38-macosx_x86_64", version = "3.8", url = "https://www.python.org/ftp/python/3.8.10/python-3.8.10-macosx10.9.pkg" },
   { identifier = "cp38-macosx_arm64", version = "3.8", url = "https://www.python.org/ftp/python/3.8.10/python-3.8.10-macosx10.9.pkg" },
   { identifier = "cp38-macosx_universal2", version = "3.8", url = "https://www.python.org/ftp/python/3.8.10/python-3.8.10-macosx10.9.pkg" },
-  { identifier = "cp39-macosx_x86_64", version = "3.9", url = "https://www.python.org/ftp/python/3.9.12/python-3.9.12-macos11.pkg" },
-  { identifier = "cp39-macosx_arm64", version = "3.9", url = "https://www.python.org/ftp/python/3.9.12/python-3.9.12-macos11.pkg" },
-  { identifier = "cp39-macosx_universal2", version = "3.9", url = "https://www.python.org/ftp/python/3.9.12/python-3.9.12-macos11.pkg" },
-  { identifier = "cp310-macosx_x86_64", version = "3.10", url = "https://www.python.org/ftp/python/3.10.4/python-3.10.4-macos11.pkg" },
-  { identifier = "cp310-macosx_arm64", version = "3.10", url = "https://www.python.org/ftp/python/3.10.4/python-3.10.4-macos11.pkg" },
-  { identifier = "cp310-macosx_universal2", version = "3.10", url = "https://www.python.org/ftp/python/3.10.4/python-3.10.4-macos11.pkg" },
+  { identifier = "cp39-macosx_x86_64", version = "3.9", url = "https://www.python.org/ftp/python/3.9.13/python-3.9.13-macos11.pkg" },
+  { identifier = "cp39-macosx_arm64", version = "3.9", url = "https://www.python.org/ftp/python/3.9.13/python-3.9.13-macos11.pkg" },
+  { identifier = "cp39-macosx_universal2", version = "3.9", url = "https://www.python.org/ftp/python/3.9.13/python-3.9.13-macos11.pkg" },
+  { identifier = "cp310-macosx_x86_64", version = "3.10", url = "https://www.python.org/ftp/python/3.10.5/python-3.10.5-macos11.pkg" },
+  { identifier = "cp310-macosx_arm64", version = "3.10", url = "https://www.python.org/ftp/python/3.10.5/python-3.10.5-macos11.pkg" },
+  { identifier = "cp310-macosx_universal2", version = "3.10", url = "https://www.python.org/ftp/python/3.10.5/python-3.10.5-macos11.pkg" },
+  { identifier = "cp311-macosx_x86_64", version = "3.11", url = "https://www.python.org/ftp/python/3.11.0/python-3.11.0b4-macos11.pkg" },
+  { identifier = "cp311-macosx_arm64", version = "3.11", url = "https://www.python.org/ftp/python/3.11.0/python-3.11.0b4-macos11.pkg" },
+  { identifier = "cp311-macosx_universal2", version = "3.11", url = "https://www.python.org/ftp/python/3.11.0/python-3.11.0b4-macos11.pkg" },
   { identifier = "pp37-macosx_x86_64", version = "3.7", url = "https://downloads.python.org/pypy/pypy3.7-v7.3.9-osx64.tar.bz2" },
   { identifier = "pp38-macosx_x86_64", version = "3.8", url = "https://downloads.python.org/pypy/pypy3.8-v7.3.9-osx64.tar.bz2" },
   { identifier = "pp39-macosx_x86_64", version = "3.9", url = "https://downloads.python.org/pypy/pypy3.9-v7.3.9-osx64.tar.bz2" },
@@ -87,12 +100,15 @@ python_configurations = [
   { identifier = "cp37-win_amd64", version = "3.7.9", arch = "64" },
   { identifier = "cp38-win32", version = "3.8.10", arch = "32" },
   { identifier = "cp38-win_amd64", version = "3.8.10", arch = "64" },
-  { identifier = "cp39-win32", version = "3.9.12", arch = "32" },
-  { identifier = "cp39-win_amd64", version = "3.9.12", arch = "64" },
-  { identifier = "cp310-win32", version = "3.10.4", arch = "32" },
-  { identifier = "cp310-win_amd64", version = "3.10.4", arch = "64" },
+  { identifier = "cp39-win32", version = "3.9.13", arch = "32" },
+  { identifier = "cp39-win_amd64", version = "3.9.13", arch = "64" },
+  { identifier = "cp310-win32", version = "3.10.5", arch = "32" },
+  { identifier = "cp310-win_amd64", version = "3.10.5", arch = "64" },
+  { identifier = "cp311-win32", version = "3.11.0-b4", arch = "32" },
+  { identifier = "cp311-win_amd64", version = "3.11.0-b4", arch = "64" },
   { identifier = "cp39-win_arm64", version = "3.9.10", arch = "ARM64" },
-  { identifier = "cp310-win_arm64", version = "3.10.4", arch = "ARM64" },
+  { identifier = "cp310-win_arm64", version = "3.10.5", arch = "ARM64" },
+  { identifier = "cp311-win_arm64", version = "3.11.0-b4", arch = "ARM64" },
   { identifier = "pp37-win_amd64", version = "3.7", arch = "64", url = "https://downloads.python.org/pypy/pypy3.7-v7.3.9-win64.zip" },
   { identifier = "pp38-win_amd64", version = "3.8", arch = "64", url = "https://downloads.python.org/pypy/pypy3.8-v7.3.9-win64.zip" },
   { identifier = "pp39-win_amd64", version = "3.9", arch = "64", url = "https://downloads.python.org/pypy/pypy3.9-v7.3.9-win64.zip" },

cibuildwheel/resources/constraints-python310.txt

@@ -6,17 +6,17 @@
 #
 delocate==0.10.2
     # via -r cibuildwheel/resources/constraints.in
-distlib==0.3.4
+distlib==0.3.5
     # via virtualenv
-filelock==3.6.0
+filelock==3.7.1
     # via virtualenv
-platformdirs==2.5.1
+platformdirs==2.5.2
     # via virtualenv
 six==1.16.0
     # via virtualenv
-typing-extensions==4.1.1
+typing-extensions==4.3.0
     # via delocate
-virtualenv==20.14.0
+virtualenv==20.15.1
     # via -r cibuildwheel/resources/constraints.in
 wheel==0.37.1
     # via
@@ -24,7 +24,7 @@ wheel==0.37.1
     #   delocate
 
 # The following packages are considered to be unsafe in a requirements file:
-pip==22.0.4
+pip==22.1.2
     # via -r cibuildwheel/resources/constraints.in
-setuptools==61.3.0
+setuptools==63.2.0
     # via -r cibuildwheel/resources/constraints.in

cibuildwheel/resources/constraints-python311.txt

@@ -0,0 +1,30 @@
+#
+# This file is autogenerated by pip-compile with python 3.11
+# To update, run:
+#
+#    bin/update_dependencies.py
+#
+delocate==0.10.2
+    # via -r cibuildwheel/resources/constraints.in
+distlib==0.3.5
+    # via virtualenv
+filelock==3.7.1
+    # via virtualenv
+platformdirs==2.5.2
+    # via virtualenv
+six==1.16.0
+    # via virtualenv
+typing-extensions==4.3.0
+    # via delocate
+virtualenv==20.15.1
+    # via -r cibuildwheel/resources/constraints.in
+wheel==0.37.1
+    # via
+    #   -r cibuildwheel/resources/constraints.in
+    #   delocate
+
+# The following packages are considered to be unsafe in a requirements file:
+pip==22.1.2
+    # via -r cibuildwheel/resources/constraints.in
+setuptools==63.2.0
+    # via -r cibuildwheel/resources/constraints.in

cibuildwheel/resources/constraints-python36.txt

@@ -6,7 +6,7 @@
 #
 delocate==0.10.2
     # via -r cibuildwheel/resources/constraints.in
-distlib==0.3.4
+distlib==0.3.5
     # via virtualenv
 filelock==3.4.1
     # via virtualenv
@@ -22,7 +22,7 @@ typing-extensions==4.1.1
     # via
     #   delocate
     #   importlib-metadata
-virtualenv==20.14.0
+virtualenv==20.15.1
     # via -r cibuildwheel/resources/constraints.in
 wheel==0.37.1
     # via

cibuildwheel/resources/constraints-python37.txt

@@ -6,31 +6,31 @@
 #
 delocate==0.10.2
     # via -r cibuildwheel/resources/constraints.in
-distlib==0.3.4
+distlib==0.3.5
     # via virtualenv
-filelock==3.6.0
+filelock==3.7.1
     # via virtualenv
-importlib-metadata==4.11.3
+importlib-metadata==4.12.0
     # via virtualenv
-platformdirs==2.5.1
+platformdirs==2.5.2
     # via virtualenv
 six==1.16.0
     # via virtualenv
-typing-extensions==4.1.1
+typing-extensions==4.3.0
     # via
     #   delocate
     #   importlib-metadata
-virtualenv==20.14.0
+virtualenv==20.15.1
     # via -r cibuildwheel/resources/constraints.in
 wheel==0.37.1
     # via
     #   -r cibuildwheel/resources/constraints.in
     #   delocate
-zipp==3.7.0
+zipp==3.8.1
     # via importlib-metadata
 
 # The following packages are considered to be unsafe in a requirements file:
-pip==22.0.4
+pip==22.1.2
     # via -r cibuildwheel/resources/constraints.in
-setuptools==61.3.0
+setuptools==63.2.0
     # via -r cibuildwheel/resources/constraints.in

cibuildwheel/resources/constraints-python38.txt

@@ -6,17 +6,17 @@
 #
 delocate==0.10.2
     # via -r cibuildwheel/resources/constraints.in
-distlib==0.3.4
+distlib==0.3.5
     # via virtualenv
-filelock==3.6.0
+filelock==3.7.1
     # via virtualenv
-platformdirs==2.5.1
+platformdirs==2.5.2
     # via virtualenv
 six==1.16.0
     # via virtualenv
-typing-extensions==4.1.1
+typing-extensions==4.3.0
     # via delocate
-virtualenv==20.14.0
+virtualenv==20.15.1
     # via -r cibuildwheel/resources/constraints.in
 wheel==0.37.1
     # via
@@ -24,7 +24,7 @@ wheel==0.37.1
     #   delocate
 
 # The following packages are considered to be unsafe in a requirements file:
-pip==22.0.4
+pip==22.1.2
     # via -r cibuildwheel/resources/constraints.in
-setuptools==61.3.0
+setuptools==63.2.0
     # via -r cibuildwheel/resources/constraints.in

cibuildwheel/resources/constraints-python39.txt

@@ -6,17 +6,17 @@
 #
 delocate==0.10.2
     # via -r cibuildwheel/resources/constraints.in
-distlib==0.3.4
+distlib==0.3.5
     # via virtualenv
-filelock==3.6.0
+filelock==3.7.1
     # via virtualenv
-platformdirs==2.5.1
+platformdirs==2.5.2
     # via virtualenv
 six==1.16.0
     # via virtualenv
-typing-extensions==4.1.1
+typing-extensions==4.3.0
     # via delocate
-virtualenv==20.14.0
+virtualenv==20.15.1
     # via -r cibuildwheel/resources/constraints.in
 wheel==0.37.1
     # via
@@ -24,7 +24,7 @@ wheel==0.37.1
     #   delocate
 
 # The following packages are considered to be unsafe in a requirements file:
-pip==22.0.4
+pip==22.1.2
     # via -r cibuildwheel/resources/constraints.in
-setuptools==61.3.0
+setuptools==63.2.0
     # via -r cibuildwheel/resources/constraints.in

cibuildwheel/resources/constraints.txt

@@ -6,17 +6,17 @@
 #
 delocate==0.10.2
     # via -r cibuildwheel/resources/constraints.in
-distlib==0.3.4
+distlib==0.3.5
     # via virtualenv
-filelock==3.6.0
+filelock==3.7.1
     # via virtualenv
-platformdirs==2.5.1
+platformdirs==2.5.2
     # via virtualenv
 six==1.16.0
     # via virtualenv
-typing-extensions==4.1.1
+typing-extensions==4.3.0
     # via delocate
-virtualenv==20.14.0
+virtualenv==20.15.1
     # via -r cibuildwheel/resources/constraints.in
 wheel==0.37.1
     # via
@@ -24,7 +24,7 @@ wheel==0.37.1
     #   delocate
 
 # The following packages are considered to be unsafe in a requirements file:
-pip==22.0.4
+pip==22.1.2
     # via -r cibuildwheel/resources/constraints.in
-setuptools==61.3.0
+setuptools==63.2.0
     # via -r cibuildwheel/resources/constraints.in

cibuildwheel/resources/defaults.toml

@@ -19,6 +19,8 @@ before-test = ""
 test-requires = []
 test-extras = []
 
+container-engine = "docker"
+
 manylinux-x86_64-image = "manylinux2014"
 manylinux-i686-image = "manylinux2014"
 manylinux-aarch64-image = "manylinux2014"

cibuildwheel/resources/pinned_docker_images.cfg

@@ -1,43 +1,48 @@
 [x86_64]
-manylinux1 = quay.io/pypa/manylinux1_x86_64:2022-03-31-9afae1d
-manylinux2010 = quay.io/pypa/manylinux2010_x86_64:2022-03-31-361e6b6
-manylinux2014 = quay.io/pypa/manylinux2014_x86_64:2022-03-31-361e6b6
-manylinux_2_24 = quay.io/pypa/manylinux_2_24_x86_64:2022-03-31-361e6b6
-musllinux_1_1 = quay.io/pypa/musllinux_1_1_x86_64:2022-03-31-361e6b6
+manylinux1 = quay.io/pypa/manylinux1_x86_64:2022-07-17-f8ddacc
+manylinux2010 = quay.io/pypa/manylinux2010_x86_64:2022-07-17-51324db
+manylinux2014 = quay.io/pypa/manylinux2014_x86_64:2022-07-17-51324db
+manylinux_2_24 = quay.io/pypa/manylinux_2_24_x86_64:2022-07-17-51324db
+manylinux_2_28 = quay.io/pypa/manylinux_2_28_x86_64:2022-07-17-51324db
+musllinux_1_1 = quay.io/pypa/musllinux_1_1_x86_64:2022-07-17-51324db
 
 [i686]
-manylinux1 = quay.io/pypa/manylinux1_i686:2022-03-31-9afae1d
-manylinux2010 = quay.io/pypa/manylinux2010_i686:2022-03-31-361e6b6
-manylinux2014 = quay.io/pypa/manylinux2014_i686:2022-03-31-361e6b6
-manylinux_2_24 = quay.io/pypa/manylinux_2_24_i686:2022-03-31-361e6b6
-musllinux_1_1 = quay.io/pypa/musllinux_1_1_i686:2022-03-31-361e6b6
+manylinux1 = quay.io/pypa/manylinux1_i686:2022-07-17-f8ddacc
+manylinux2010 = quay.io/pypa/manylinux2010_i686:2022-07-17-51324db
+manylinux2014 = quay.io/pypa/manylinux2014_i686:2022-07-17-51324db
+manylinux_2_24 = quay.io/pypa/manylinux_2_24_i686:2022-07-17-51324db
+musllinux_1_1 = quay.io/pypa/musllinux_1_1_i686:2022-07-17-51324db
 
 [pypy_x86_64]
-manylinux2010 = quay.io/pypa/manylinux2010_x86_64:2022-03-31-361e6b6
-manylinux2014 = quay.io/pypa/manylinux2014_x86_64:2022-03-31-361e6b6
-manylinux_2_24 = quay.io/pypa/manylinux_2_24_x86_64:2022-03-31-361e6b6
+manylinux2010 = quay.io/pypa/manylinux2010_x86_64:2022-07-17-51324db
+manylinux2014 = quay.io/pypa/manylinux2014_x86_64:2022-07-17-51324db
+manylinux_2_24 = quay.io/pypa/manylinux_2_24_x86_64:2022-07-17-51324db
+manylinux_2_28 = quay.io/pypa/manylinux_2_28_x86_64:2022-07-17-51324db
 
 [pypy_i686]
-manylinux2010 = quay.io/pypa/manylinux2010_i686:2022-03-31-361e6b6
-manylinux2014 = quay.io/pypa/manylinux2014_i686:2022-03-31-361e6b6
-manylinux_2_24 = quay.io/pypa/manylinux_2_24_i686:2022-03-31-361e6b6
+manylinux2010 = quay.io/pypa/manylinux2010_i686:2022-07-17-51324db
+manylinux2014 = quay.io/pypa/manylinux2014_i686:2022-07-17-51324db
+manylinux_2_24 = quay.io/pypa/manylinux_2_24_i686:2022-07-17-51324db
 
 [aarch64]
-manylinux2014 = quay.io/pypa/manylinux2014_aarch64:2022-03-31-361e6b6
-manylinux_2_24 = quay.io/pypa/manylinux_2_24_aarch64:2022-03-31-361e6b6
-musllinux_1_1 = quay.io/pypa/musllinux_1_1_aarch64:2022-03-31-361e6b6
+manylinux2014 = quay.io/pypa/manylinux2014_aarch64:2022-07-17-51324db
+manylinux_2_24 = quay.io/pypa/manylinux_2_24_aarch64:2022-07-17-51324db
+manylinux_2_28 = quay.io/pypa/manylinux_2_28_aarch64:2022-07-17-51324db
+musllinux_1_1 = quay.io/pypa/musllinux_1_1_aarch64:2022-07-17-51324db
 
 [ppc64le]
-manylinux2014 = quay.io/pypa/manylinux2014_ppc64le:2022-03-31-361e6b6
-manylinux_2_24 = quay.io/pypa/manylinux_2_24_ppc64le:2022-03-31-361e6b6
-musllinux_1_1 = quay.io/pypa/musllinux_1_1_ppc64le:2022-03-31-361e6b6
+manylinux2014 = quay.io/pypa/manylinux2014_ppc64le:2022-07-17-51324db
+manylinux_2_24 = quay.io/pypa/manylinux_2_24_ppc64le:2022-07-17-51324db
+manylinux_2_28 = quay.io/pypa/manylinux_2_28_ppc64le:2022-07-17-51324db
+musllinux_1_1 = quay.io/pypa/musllinux_1_1_ppc64le:2022-07-17-51324db
 
 [s390x]
-manylinux2014 = quay.io/pypa/manylinux2014_s390x:2022-03-31-361e6b6
-manylinux_2_24 = quay.io/pypa/manylinux_2_24_s390x:2022-03-31-361e6b6
-musllinux_1_1 = quay.io/pypa/musllinux_1_1_s390x:2022-03-31-361e6b6
+manylinux2014 = quay.io/pypa/manylinux2014_s390x:2022-07-17-51324db
+manylinux_2_24 = quay.io/pypa/manylinux_2_24_s390x:2022-07-17-51324db
+musllinux_1_1 = quay.io/pypa/musllinux_1_1_s390x:2022-07-17-51324db
 
 [pypy_aarch64]
-manylinux2014 = quay.io/pypa/manylinux2014_aarch64:2022-03-31-361e6b6
-manylinux_2_24 = quay.io/pypa/manylinux_2_24_aarch64:2022-03-31-361e6b6
+manylinux2014 = quay.io/pypa/manylinux2014_aarch64:2022-07-17-51324db
+manylinux_2_24 = quay.io/pypa/manylinux_2_24_aarch64:2022-07-17-51324db
+manylinux_2_28 = quay.io/pypa/manylinux_2_28_aarch64:2022-07-17-51324db
 

cibuildwheel/resources/virtualenv.toml

@@ -1,2 +1,2 @@
-version = "20.13.3"
-url = "https://github.com/pypa/get-virtualenv/blob/20.13.3/public/virtualenv.pyz?raw=true"
+version = "20.15.1"
+url = "https://github.com/pypa/get-virtualenv/blob/20.15.1/public/virtualenv.pyz?raw=true"

cibuildwheel/util.py

@@ -1,5 +1,4 @@
 import contextlib
-import dataclasses
 import fnmatch
 import itertools
 import os
@@ -11,31 +10,39 @@ import sys
 import textwrap
 import time
 import urllib.request
+from dataclasses import dataclass
 from enum import Enum
 from functools import lru_cache
-from pathlib import Path
+from pathlib import Path, PurePath
 from time import sleep
 from typing import (
     Any,
     ClassVar,
     Dict,
+    Generator,
     Iterable,
-    Iterator,
     List,
-    NamedTuple,
     Optional,
     Sequence,
     TextIO,
+    TypeVar,
+    Union,
     cast,
     overload,
 )
 
 import bracex
 import certifi
-import tomli
+
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli as tomllib
+
 from filelock import FileLock
 from packaging.requirements import InvalidRequirement, Requirement
 from packaging.specifiers import SpecifierSet
+from packaging.utils import parse_wheel_filename
 from packaging.version import Version
 from platformdirs import user_cache_path
 
@@ -46,6 +53,7 @@ __all__ = [
     "MANYLINUX_ARCHS",
     "call",
     "shell",
+    "find_compatible_wheel",
     "format_safe",
     "prepare_command",
     "get_build_verbosity_extra_flags",
@@ -53,6 +61,7 @@ __all__ = [
     "selector_matches",
     "strtobool",
     "cached_property",
+    "chdir",
 ]
 
 resources_dir: Final = Path(__file__).parent / "resources"
@@ -203,7 +212,7 @@ def get_build_verbosity_extra_flags(level: int) -> List[str]:
 def read_python_configs(config: PlatformName) -> List[Dict[str, str]]:
     input_file = resources_dir / "build-platforms.toml"
     with input_file.open("rb") as f:
-        loaded_file = tomli.load(f)
+        loaded_file = tomllib.load(f)
     results: List[Dict[str, str]] = list(loaded_file[config]["python_configurations"])
     return results
 
@@ -223,22 +232,21 @@ def selector_matches(patterns: str, string: str) -> bool:
 
 
 # Once we require Python 3.10+, we can add kw_only=True
-@dataclasses.dataclass
-class IdentifierSelector:
+@dataclass(frozen=True)
+class BuildSelector:
     """
     This class holds a set of build/skip patterns. You call an instance with a
     build identifier, and it returns True if that identifier should be
     included. Only call this on valid identifiers, ones that have at least 2
-    numeric digits before the first dash. If a pre-release version X.Y is present,
-    you can filter it with prerelease="XY".
+    numeric digits before the first dash.
     """
 
-    # a pattern that skips prerelease versions, when include_prereleases is False.
-    PRERELEASE_SKIP: ClassVar[str] = ""
-
-    skip_config: str
     build_config: str
+    skip_config: str
     requires_python: Optional[SpecifierSet] = None
+
+    # a pattern that skips prerelease versions, when include_prereleases is False.
+    PRERELEASE_SKIP: ClassVar[str] = "cp311-*"
     prerelease_pythons: bool = False
 
     def __call__(self, build_id: str) -> bool:
@@ -261,16 +269,17 @@ class IdentifierSelector:
         return should_build and not should_skip
 
 
-@dataclasses.dataclass
-class BuildSelector(IdentifierSelector):
-    pass
+@dataclass(frozen=True)
+class TestSelector:
+    """
+    A build selector that can only skip tests according to a skip pattern.
+    """
 
+    skip_config: str
 
-# Note that requires-python is not needed for TestSelector, as you can't test
-# what you can't build.
-@dataclasses.dataclass
-class TestSelector(IdentifierSelector):
-    build_config: str = "*"
+    def __call__(self, build_id: str) -> bool:
+        should_skip = selector_matches(self.skip_config, build_id)
+        return not should_skip
 
 
 # Taken from https://stackoverflow.com/a/107717
@@ -307,7 +316,7 @@ def download(url: str, dest: Path) -> None:
                 dest.write_bytes(response.read())
                 return
 
-        except urllib.error.URLError:
+        except OSError:
             if i == repeat_num - 1:
                 raise
             sleep(3)
@@ -363,6 +372,20 @@ class NonPlatformWheelError(Exception):
         super().__init__(message)
 
 
+class AlreadyBuiltWheelError(Exception):
+    def __init__(self, wheel_name: str) -> None:
+        message = textwrap.dedent(
+            f"""
+            cibuildwheel: Build failed because a wheel named {wheel_name} was already generated in the current run.
+
+            If you expected another wheel to be generated, check your project configuration, or run
+            cibuildwheel with CIBW_BUILD_VERBOSITY=1 to view build logs.
+            """
+        )
+
+        super().__init__(message)
+
+
 def strtobool(val: str) -> bool:
     return val.lower() in {"y", "yes", "t", "true", "on", "1"}
 
@@ -408,8 +431,14 @@ def unwrap(text: str) -> str:
     return re.sub(r"\s+", " ", text)
 
 
+@dataclass(frozen=True)
+class FileReport:
+    name: str
+    size: str
+
+
 @contextlib.contextmanager
-def print_new_wheels(msg: str, output_dir: Path) -> Iterator[None]:
+def print_new_wheels(msg: str, output_dir: Path) -> Generator[None, None, None]:
     """
     Prints the new items in a directory upon exiting. The message to display
     can include {n} for number of wheels, {s} for total number of seconds,
@@ -422,14 +451,14 @@ def print_new_wheels(msg: str, output_dir: Path) -> Iterator[None]:
     yield
     final_contents = set(output_dir.iterdir())
 
-    class FileReport(NamedTuple):
-        name: str
-        size: str
-
     new_contents = [
         FileReport(wheel.name, f"{(wheel.stat().st_size + 1023) // 1024:,d}")
         for wheel in final_contents - existing_contents
     ]
+
+    if len(new_contents) == 0:
+        return
+
     max_name_len = max(len(f.name) for f in new_contents)
     max_size_len = max(len(f.size) for f in new_contents)
     n = len(new_contents)
@@ -460,7 +489,7 @@ def get_pip_version(env: Dict[str, str]) -> str:
 def _ensure_virtualenv() -> Path:
     input_file = resources_dir / "virtualenv.toml"
     with input_file.open("rb") as f:
-        loaded_file = tomli.load(f)
+        loaded_file = tomllib.load(f)
     version = str(loaded_file["version"])
     url = str(loaded_file["url"])
     path = CIBW_CACHE_PATH / f"virtualenv-{version}.pyz"
@@ -557,7 +586,67 @@ def virtualenv(
     return env
 
 
+T = TypeVar("T", bound=PurePath)
+
+
+def find_compatible_wheel(wheels: Sequence[T], identifier: str) -> Optional[T]:
+    """
+    Finds a wheel with an abi3 or a none ABI tag in `wheels` compatible with the Python interpreter
+    specified by `identifier` that is previously built.
+    """
+
+    interpreter, platform = identifier.split("-")
+    for wheel in wheels:
+        _, _, _, tags = parse_wheel_filename(wheel.name)
+        for tag in tags:
+            if tag.abi == "abi3":
+                # ABI3 wheels must start with cp3 for impl and tag
+                if not (interpreter.startswith("cp3") and tag.interpreter.startswith("cp3")):
+                    continue
+            elif tag.abi == "none":
+                # CPythonless wheels must include py3 tag
+                if tag.interpreter[:3] != "py3":
+                    continue
+            else:
+                # Other types of wheels are not detected, this is looking for previously built wheels.
+                continue
+
+            if tag.interpreter != "py3" and int(tag.interpreter[3:]) > int(interpreter[3:]):
+                # If a minor version number is given, it has to be lower than the current one.
+                continue
+
+            if platform.startswith(("manylinux", "musllinux", "macosx")):
+                # Linux, macOS require the beginning and ending match (macos/manylinux version doesn't need to)
+                os_, arch = platform.split("_", 1)
+                if not tag.platform.startswith(os_):
+                    continue
+                if not tag.platform.endswith(f"_{arch}"):
+                    continue
+            else:
+                # Windows should exactly match
+                if not tag.platform == platform:
+                    continue
+
+            # If all the filters above pass, then the wheel is a previously built compatible wheel.
+            return wheel
+
+    return None
+
+
 if sys.version_info >= (3, 8):
     from functools import cached_property
 else:
     from .functools_cached_property_38 import cached_property
+
+
+# Can be replaced by contextlib.chdir in Python 3.11
+@contextlib.contextmanager
+def chdir(new_path: Union[Path, str]) -> Generator[None, None, None]:
+    """Non thread-safe context manager to change the current working directory."""
+
+    cwd = os.getcwd()
+    try:
+        os.chdir(new_path)
+        yield
+    finally:
+        os.chdir(cwd)

cibuildwheel/windows.py

@@ -2,9 +2,10 @@ import os
 import shutil
 import subprocess
 import sys
+from dataclasses import dataclass
 from functools import lru_cache
 from pathlib import Path
-from typing import Dict, List, NamedTuple, Optional, Sequence, Set
+from typing import Dict, List, Optional, Sequence, Set
 from zipfile import ZipFile
 
 from filelock import FileLock
@@ -17,11 +18,13 @@ from .options import Options
 from .typing import PathOrStr, assert_never
 from .util import (
     CIBW_CACHE_PATH,
+    AlreadyBuiltWheelError,
     BuildFrontend,
     BuildSelector,
     NonPlatformWheelError,
     call,
     download,
+    find_compatible_wheel,
     get_build_verbosity_extra_flags,
     get_pip_version,
     prepare_command,
@@ -45,7 +48,8 @@ def get_nuget_args(version: str, arch: str, output_directory: Path) -> List[str]
     ]
 
 
-class PythonConfiguration(NamedTuple):
+@dataclass(frozen=True)
+class PythonConfiguration:
     version: str
     arch: str
     identifier: str
@@ -234,6 +238,9 @@ def build(options: Options, tmp_path: Path) -> None:
         options.globals.build_selector, options.globals.architectures
     )
 
+    if len(python_configurations) == 0:
+        return
+
     try:
         before_all_options_identifier = python_configurations[0].identifier
         before_all_options = options.build_options(before_all_options_identifier)
@@ -246,6 +253,8 @@ def build(options: Options, tmp_path: Path) -> None:
             )
             shell(before_all_prepared, env=env)
 
+        built_wheels: List[Path] = []
+
         for config in python_configurations:
             build_options = options.build_options(config.identifier)
             log.build_start(config.identifier)
@@ -271,83 +280,96 @@ def build(options: Options, tmp_path: Path) -> None:
                 build_options.build_frontend,
             )
 
-            # run the before_build command
-            if build_options.before_build:
-                log.step("Running before_build...")
-                before_build_prepared = prepare_command(
-                    build_options.before_build, project=".", package=options.globals.package_dir
+            compatible_wheel = find_compatible_wheel(built_wheels, config.identifier)
+            if compatible_wheel:
+                log.step_end()
+                print(
+                    f"\nFound previously built wheel {compatible_wheel.name}, that's compatible with {config.identifier}. Skipping build step..."
                 )
-                shell(before_build_prepared, env=env)
-
-            log.step("Building wheel...")
-            built_wheel_dir.mkdir()
-
-            verbosity_flags = get_build_verbosity_extra_flags(build_options.build_verbosity)
-
-            if build_options.build_frontend == "pip":
-                # Path.resolve() is needed. Without it pip wheel may try to fetch package from pypi.org
-                # see https://github.com/pypa/cibuildwheel/pull/369
-                call(
-                    "python",
-                    "-m",
-                    "pip",
-                    "wheel",
-                    options.globals.package_dir.resolve(),
-                    f"--wheel-dir={built_wheel_dir}",
-                    "--no-deps",
-                    *get_build_verbosity_extra_flags(build_options.build_verbosity),
-                    env=env,
-                )
-            elif build_options.build_frontend == "build":
-                config_setting = " ".join(verbosity_flags)
-                build_env = env.copy()
-                if build_options.dependency_constraints:
-                    constraints_path = build_options.dependency_constraints.get_for_python_version(
-                        config.version
+                repaired_wheel = compatible_wheel
+            else:
+                # run the before_build command
+                if build_options.before_build:
+                    log.step("Running before_build...")
+                    before_build_prepared = prepare_command(
+                        build_options.before_build, project=".", package=options.globals.package_dir
                     )
-                    # Bug in pip <= 21.1.3 - we can't have a space in the
-                    # constraints file, and pip doesn't support drive letters
-                    # in uhi.  After probably pip 21.2, we can use uri. For
-                    # now, use a temporary file.
-                    if " " in str(constraints_path):
-                        assert " " not in str(identifier_tmp_dir)
-                        tmp_file = identifier_tmp_dir / "constraints.txt"
-                        tmp_file.write_bytes(constraints_path.read_bytes())
-                        constraints_path = tmp_file
+                    shell(before_build_prepared, env=env)
 
-                    build_env["PIP_CONSTRAINT"] = str(constraints_path)
-                    build_env["VIRTUALENV_PIP"] = get_pip_version(env)
+                log.step("Building wheel...")
+                built_wheel_dir.mkdir()
+
+                verbosity_flags = get_build_verbosity_extra_flags(build_options.build_verbosity)
+
+                if build_options.build_frontend == "pip":
+                    # Path.resolve() is needed. Without it pip wheel may try to fetch package from pypi.org
+                    # see https://github.com/pypa/cibuildwheel/pull/369
                     call(
                         "python",
                         "-m",
-                        "build",
-                        build_options.package_dir,
-                        "--wheel",
-                        f"--outdir={built_wheel_dir}",
-                        f"--config-setting={config_setting}",
-                        env=build_env,
+                        "pip",
+                        "wheel",
+                        options.globals.package_dir.resolve(),
+                        f"--wheel-dir={built_wheel_dir}",
+                        "--no-deps",
+                        *get_build_verbosity_extra_flags(build_options.build_verbosity),
+                        env=env,
                     )
-            else:
-                assert_never(build_options.build_frontend)
+                elif build_options.build_frontend == "build":
+                    config_setting = " ".join(verbosity_flags)
+                    build_env = env.copy()
+                    if build_options.dependency_constraints:
+                        constraints_path = (
+                            build_options.dependency_constraints.get_for_python_version(
+                                config.version
+                            )
+                        )
+                        # Bug in pip <= 21.1.3 - we can't have a space in the
+                        # constraints file, and pip doesn't support drive letters
+                        # in uhi.  After probably pip 21.2, we can use uri. For
+                        # now, use a temporary file.
+                        if " " in str(constraints_path):
+                            assert " " not in str(identifier_tmp_dir)
+                            tmp_file = identifier_tmp_dir / "constraints.txt"
+                            tmp_file.write_bytes(constraints_path.read_bytes())
+                            constraints_path = tmp_file
 
-            built_wheel = next(built_wheel_dir.glob("*.whl"))
+                        build_env["PIP_CONSTRAINT"] = str(constraints_path)
+                        build_env["VIRTUALENV_PIP"] = get_pip_version(env)
+                        call(
+                            "python",
+                            "-m",
+                            "build",
+                            build_options.package_dir,
+                            "--wheel",
+                            f"--outdir={built_wheel_dir}",
+                            f"--config-setting={config_setting}",
+                            env=build_env,
+                        )
+                else:
+                    assert_never(build_options.build_frontend)
 
-            # repair the wheel
-            repaired_wheel_dir.mkdir()
+                built_wheel = next(built_wheel_dir.glob("*.whl"))
 
-            if built_wheel.name.endswith("none-any.whl"):
-                raise NonPlatformWheelError()
+                # repair the wheel
+                repaired_wheel_dir.mkdir()
 
-            if build_options.repair_command:
-                log.step("Repairing wheel...")
-                repair_command_prepared = prepare_command(
-                    build_options.repair_command, wheel=built_wheel, dest_dir=repaired_wheel_dir
-                )
-                shell(repair_command_prepared, env=env)
-            else:
-                shutil.move(str(built_wheel), repaired_wheel_dir)
+                if built_wheel.name.endswith("none-any.whl"):
+                    raise NonPlatformWheelError()
 
-            repaired_wheel = next(repaired_wheel_dir.glob("*.whl"))
+                if build_options.repair_command:
+                    log.step("Repairing wheel...")
+                    repair_command_prepared = prepare_command(
+                        build_options.repair_command, wheel=built_wheel, dest_dir=repaired_wheel_dir
+                    )
+                    shell(repair_command_prepared, env=env)
+                else:
+                    shutil.move(str(built_wheel), repaired_wheel_dir)
+
+                repaired_wheel = next(repaired_wheel_dir.glob("*.whl"))
+
+                if repaired_wheel.name in {wheel.name for wheel in built_wheels}:
+                    raise AlreadyBuiltWheelError(repaired_wheel.name)
 
             if build_options.test_command and options.globals.test_selector(config.identifier):
                 log.step("Testing wheel...")
@@ -402,7 +424,9 @@ def build(options: Options, tmp_path: Path) -> None:
                 shell(test_command_prepared, cwd="c:\\", env=virtualenv_env)
 
             # we're all done here; move it to output (remove if already exists)
-            shutil.move(str(repaired_wheel), build_options.output_dir)
+            if compatible_wheel is None:
+                shutil.move(str(repaired_wheel), build_options.output_dir)
+                built_wheels.append(build_options.output_dir / repaired_wheel.name)
 
             # clean up
             # (we ignore errors because occasionally Windows fails to unlink a file and we

docs/changelog.md

@@ -2,6 +2,60 @@
 title: Changelog
 ---
 
+### v2.8.1
+
+_18 July 2022_
+
+- 🐛 Fix a bug when building CPython 3.8 wheels on an Apple Silicon machine where testing would always fail. cibuildwheel will no longer attempt to test the arm64 part of CPython 3.8 wheels because we use the x86_64 installer of CPython 3.8 due to its macOS system version backward-compatibility. See [#1169](https://github.com/pypa/cibuildwheel/pull/1169) for more details. (#1171)
+- 🛠 Update the prerelease CPython 3.11 to 3.11.0b4. (#1180)
+- 🛠 The GitHub Action will ensure a compatible version of Python is installed on the runner (#1114)
+- 📚 A few docs improvements
+
+### v2.8.0
+
+_5 July 2022_
+
+- ✨ You can now run cibuildwheel on Podman, as an alternate container engine to Docker (which remains the default). This is useful in environments where a Docker daemon isn't available, for example, it can be run inside a Docker container, or without root access. To use Podman, set the [`CIBW_CONTAINER_ENGINE`](https://cibuildwheel.readthedocs.io/en/stable/options/#container-engine) option. (#966)
+- ✨ Adds support for building `py3-none-{platform}` wheels. This works the same as ABI3 - wheels won't be rebuilt, but tests will still be run across all selected versions of Python.
+
+  > These wheels contain native extension code, but don't use the Python APIs. Typically, they're bridged to Python using a FFI module like [ctypes](https://docs.python.org/3/library/ctypes.html) or [cffi](https://cffi.readthedocs.io/en/latest/). Because they don't use Python ABI, the wheels are more compatible - they work across many Python versions.
+
+  Check out this [example ctypes project](https://github.com/joerick/python-ctypes-package-sample) to see an example of how it works. (#1151)
+- 🛠 cibuildwheel will now error if multiple builds in a single run produce the same wheel filename, as this indicates a misconfiguration. (#1152)
+- 📚 A few docs improvements and updates to keep things up-to-date.
+
+### v2.7.0
+
+_17 June 2022_
+
+- 🌟 Added support for the new `manylinux_2_28` images. These new images are based on AlmaLinux, the community-driven successor to CentOS, unlike manylinux_2_24, which was based on Debian. To build on these images, set your [`CIBW_MANYLINUX_*_IMAGE`](https://cibuildwheel.readthedocs.io/en/stable/options/#linux-image) option to `manylinux_2_28`. (#1026)
+- 🐛 Fix a bug where tests were not being run on CPython 3.11 (when CIBW_PRERELEASE_PYTHONS was set) (#1138)
+- ✨ You can now build Linux wheels on Windows, as long as you have Docker installed and set to 'Linux containers' (#1117)
+- 🐛 Fix a bug on macOS that caused cibuildwheel to crash trying to overwrite a previously-built wheel of the same name. (#1129)
+
+### v2.6.1
+
+_7 June 2022_
+
+- 🛠 Update the prerelease CPython 3.11 to 3.11.0b3
+
+### v2.6.0
+
+_25 May 2022_
+
+- 🌟 Added the ability to test building wheels on CPython 3.11! Because CPython 3.11 is in beta, these wheels should not be distributed, because they might not be compatible with the final release, but it's available to build for testing purposes. Use the flag [`--prerelease-pythons` or `CIBW_PRERELEASE_PYTHONS`](https://cibuildwheel.readthedocs.io/en/stable/options/#prerelease-pythons) to test. This version of cibuildwheel includes CPython 3.11.0b1. (#1109)
+- 📚 Added an interactive diagram showing how cibuildwheel works to the [docs](https://cibuildwheel.readthedocs.io/en/stable/#how-it-works) (#1100)
+
+### v2.5.0
+
+_29 April 2022_
+
+- ✨ Added support for building ABI3 wheels. cibuildwheel will now recognise when an ABI3 wheel was produced, and skip subsequent build steps where the previously built wheel is compatible. Tests still will run on all selected versions of Python, using the ABI3 wheel. Check [this entry](https://cibuildwheel.readthedocs.io/en/stable/faq/#abi3) in the docs for more info. (#1091)
+- ✨ You can now build wheels directly from sdist archives, in addition to source directories. Just call cibuildwheel with an sdist argument on the command line, like `cibuildwheel mypackage-1.0.0.tar.gz`. For more details, check the [`--help` output](https://cibuildwheel.readthedocs.io/en/stable/options/#command-line) (#1096)
+- 🐛 Fix a bug where cibuildwheel would crash when no builds are selected and `--allow-empty` is passed (#1086)
+- 🐛 Workaround a permissions issue on Linux relating to newer versions of git and setuptools_scm (#1095)
+- 📚 Minor docs improvements
+
 ### v2.4.0
 
 _2 April 2022_

docs/cpp_standards.md

@@ -14,7 +14,7 @@ The old `manylinux1` image (based on CentOS 5) contains a version of GCC and lib
 
 OS X/macOS allows you to specify a so-called "deployment target" version that will ensure backwards compatibility with older versions of macOS. One way to do this is by setting the `MACOSX_DEPLOYMENT_TARGET` environment variable.
 
-However, to enable modern C++ standards, the deploment target needs to be set high enough (since older OS X/macOS versions did not have the necessary modern C++ standard library).
+However, to enable modern C++ standards, the deployment target needs to be set high enough (since older OS X/macOS versions did not have the necessary modern C++ standard library).
 
 To get C++11 and C++14 support, `MACOSX_DEPLOYMENT_TARGET` needs to be set to (at least) `"10.9"`. By default, `cibuildwheel` already does this, building 64-bit-only wheels for macOS 10.9 and later.
 

docs/data/projects.yml

@@ -287,7 +287,7 @@
   pypi: mypy
   ci: [github]
   os: [apple, linux, windows]
-  notes: MyPyC, the compiled component of MyPy.
+  notes: The compiled version of MyPy using MyPyC.
 
 - name: Imagecodecs (fork)
   gh: czaki/imagecodecs_build
@@ -521,10 +521,76 @@
   gh: arbor-sim/arbor
   ci: [github]
   os: [apple, linux]
-  pypi: arbor
   notes: >
     Arbor is a multi-compartment neuron simulation library; compatible with
     next-generation accelerators; best-practices applied to research software;
     focused on community-driven development. Includes a
     [small script](https://github.com/arbor-sim/arbor/blob/master/scripts/patchwheel.py)
     patching `rpath` in bundled libraries.
+
+- name: Kivy
+  gh: kivy/kivy
+  ci: [github]
+  os: [windows, apple, linux]
+
+- name: NCNN
+  gh: Tencent/ncnn
+  ci: [github]
+  os: [windows, apple, linux]
+
+- name: Prophet
+  gh: facebook/prophet
+  ci: [github]
+  os: [windows, apple, linux]
+
+- name: MemRay
+  gh: bloomberg/memray
+  ci: [github]
+  os: [linux]
+
+- name: PyGame
+  gh: pygame/pygame
+  ci: [github]
+  os: [apple, linux]
+
+- name: UltraJSON
+  gh: ultrajson/ultrajson
+  ci: [github]
+  os: [windows, apple, linux]
+
+- name: NumPy
+  gh: numpy/numpy
+  ci: [github, travisci]
+  os: [windows, apple, linux]
+
+- name: Wrapt
+  gh: GrahamDumpleton/wrapt
+  ci: [github]
+  os: [windows, apple, linux]
+
+- name: SimpleJSON
+  gh: simplejson/simplejson
+  ci: [github]
+  os: [windows, apple, linux]
+
+- name: Implicit
+  gh: benfred/implicit
+  ci: [github]
+  os: [windows, apple, linux]
+  notes: Includes GPU support for linux wheels
+
+- name: power-grid-model
+  gh: alliander-opensource/power-grid-model
+  ci: [github]
+  os: [windows, apple, linux]
+  notes: Python/C++ library for distribution power system analysis
+
+- name: Python-WebRTC
+  gh: MarshalX/python-webrtc
+  ci: [github]
+  os: [windows, apple, linux]
+
+- name: cf-units
+  gh: SciTools/cf-units
+  ci: [github]
+  os: [apple, linux]

docs/deliver-to-pypi.md

@@ -46,7 +46,7 @@ well as several useful actions. Alongside your existing job(s) that runs cibuild
     name: Make SDist
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with:
         fetch-depth: 0  # Optional, use if you use setuptools_scm
         submodules: true  # Optional, use if you have submodules
@@ -54,7 +54,7 @@ well as several useful actions. Alongside your existing job(s) that runs cibuild
     - name: Build SDist
       run: pipx run build --sdist
 
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v3
       with:
         path: dist/*.tar.gz
 ```
@@ -69,12 +69,12 @@ This requires a [PyPI upload token](https://pypi.org/manage/account/token/), sto
     runs-on: ubuntu-latest
     if: github.event_name == 'release' && github.event.action == 'published'
     steps:
-    - uses: actions/download-artifact@v2
+    - uses: actions/download-artifact@v3
       with:
         name: artifact
         path: dist
 
-    - uses: pypa/gh-action-pypi-publish@v1.4.2
+    - uses: pypa/gh-action-pypi-publish@v1.5.0
       with:
         user: __token__
         password: ${{ secrets.pypi_password }}

docs/diagram.md

@@ -0,0 +1,487 @@
+<div id="flow-diagram">
+  <div class="diagram-grid" v-bind:style="gridStyle">
+    <!-- BEHIND THE GRID CONTENT -->
+    <!-- line for each platform -->
+    <div class="grid-line" style="grid-row-start: 3"></div>
+    <div class="grid-line" style="grid-row-start: 4"></div>
+    <div class="grid-line" style="grid-row-start: 5"></div>
+    <!-- the docker container outline -->
+    <div class="grid-outline docker">
+      <div class="outline">
+        Manylinux container
+      </div>
+    </div>
+    <!-- the venv outlines -->
+    <div class="grid-outline testVenv" style="grid-row-start: 3">
+      <div class="outline">Test virtualenv</div>
+    </div>
+    <div class="grid-outline testVenv" style="grid-row-start: 4"><div class="outline"></div></div>
+    <div class="grid-outline testVenv" style="grid-row-start: 5"><div class="outline"></div></div>
+    <!-- THE GRID CONTENT -->
+    <!-- the row labels -->
+    <div class="grid-row-label" style="grid-row-start: 3">Linux</div>
+    <div class="grid-row-label" style="grid-row-start: 4">macOS</div>
+    <div class="grid-row-label" style="grid-row-start: 5">Windows</div>
+    <!-- the column labels -->
+    <div class="grid-column-label"
+         style="grid-row: 1 / span 1; grid-column: 5 / -3">
+      <div class="label">For each version of Python</div>
+    </div>
+    <div class="grid-column-label"
+         style="grid-row: 2 / span 1;
+                grid-column: 8 / -3;
+                margin-bottom: 0.5em;">
+      <div class="label">If tests are configured</div>
+    </div>
+    <!-- the steps -->
+    <div class="step" v-for="(step, sIndex) in diagram.steps">
+      <component v-for="action in step"
+                 class="action"
+                 v-bind:is="action.href ? 'a' : 'div'"
+                 v-bind:href="action.href">
+        <div class="dots" v-if="action.style == 'dot'">
+          <div class="dot"
+               v-info="action"
+               v-for="(platform, pIndex) in platforms"
+               v-if="action.platforms.includes(platform)"
+               v-bind:style="{gridRowStart: `${pIndex+3}`,
+                              gridColumnStart: `${sIndex+2}`}">
+            <div class="dot-graphic"></div>
+          </div>
+        </div>
+        <div class="block-container" v-if="action.style == 'block'">
+          <div class="block"
+               v-info="action"
+               v-bind:style="{...blockStyle(action),
+                              gridColumnStart: `${sIndex+2}`}">
+            {{action.label}}
+          </div>
+        </div>
+      </a>
+    </div>
+  </div>
+</div>
+
+<noscript>
+  <img src="data/how-it-works.png" alt="Diagram showing the steps for each platform">
+  <p><strong>Enable JavaScript for an interactive version of this diagram.</strong></p>
+</noscript>
+
+<script type="module" async>
+  import Vue from 'https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.esm.browser.js'
+  import 'https://unpkg.com/@popperjs/core@2/dist/umd/popper.min.js'
+  import 'https://unpkg.com/tippy.js@6/dist/tippy-bundle.umd.js'
+
+  const diagram = {
+    steps: [
+      [
+        {
+          label: 'copy project into container',
+          platforms: ['linux'],
+          style: 'block',
+          width: 2,
+        },
+      ],
+      [], // empty column so that the manylinux outline intersects the previous column in the middle.
+      [
+        {
+          href: 'options/#before-all',
+          platforms: ['linux', 'macos', 'windows'],
+          style: 'dot',
+          tooltip: {
+            title: 'CIBW_BEFORE_ALL',
+            tag: 'Optional step',
+            description: 'Execute a shell command on the build system before any wheels are built.'
+          },
+        },
+      ],
+      [
+        {
+          label: 'Install Python',
+          platforms: ['macos', 'windows'],
+          style: 'block',
+          tooltip: {
+            description: 'Install the version of Python required to build this wheel.'
+          },
+        },
+      ],
+      [
+        {
+          href: 'options/#before-build',
+          platforms: ['linux', 'macos', 'windows'],
+          style: 'dot',
+          tooltip: {
+            title: 'CIBW_BEFORE_BUILD',
+            tag: 'Optional step',
+            description: "Execute a shell command preparing each wheel's build.",
+          },
+        },
+      ],
+      [
+        {
+          label: 'Build wheel',
+          href: 'options/#build-frontend',
+          platforms: ['linux', 'macos', 'windows'],
+          style: 'block',
+          tooltip: {
+            title: 'CIBW_BUILD_FRONTEND',
+            tag: 'Customisable step',
+            description: 'Build the wheel according to your package configuration, using the frontend of your choice - pip or build.'
+          },
+        },
+      ],
+      [
+        {
+          label: 'Repair using auditwheel',
+          href: 'options/#repair-wheel-command',
+          platforms: ['linux'],
+          style: 'block',
+          tooltip: {
+            title: 'CIBW_REPAIR_WHEEL_COMMAND',
+            tag: 'Customisable step',
+            description: 'Bundle shared libraries and ensure manylinux compliance by running auditwheel on each built wheel.'
+          },
+        },
+        {
+          label: 'Repair using delocate',
+          href: 'options/#repair-wheel-command',
+          platforms: ['macos'],
+          style: 'block',
+          tooltip: {
+            title: 'CIBW_REPAIR_WHEEL_COMMAND',
+            tag: 'Customisable step',
+            description: 'Bundle shared libraries by running delocate on each built wheel.'
+          },
+        },
+        {
+          env: "CIBW_REPAIR_WHEEL_COMMAND",
+          href: 'options/#repair-wheel-command',
+          label: 'repair wheel',
+          platforms: ['windows'],
+          style: 'dot',
+          optional: true,
+          tooltip: {
+            title: 'CIBW_REPAIR_WHEEL_COMMAND',
+            tag: 'Optional step',
+            description: 'Execute a shell command to repair each built wheel'
+          },
+        },
+      ],
+      [
+        {
+          href: 'options/#before-test',
+          platforms: ['linux', 'macos', 'windows'],
+          style: 'dot',
+          tooltip: {
+            title: 'CIBW_BEFORE_TEST',
+            tag: 'Optional step',
+            description: 'Execute a shell command before testing each wheel'
+          },
+        },
+      ],
+      [
+        {
+          label: 'Install wheel',
+          platforms: ['linux', 'macos', 'windows'],
+          style: 'block',
+          tooltip: {
+            description: 'Install the wheel we just built into the test virtualenv.'
+          },
+        },
+      ],
+      [
+        {
+          label: 'Test wheel',
+          href: 'options/#test-command',
+          platforms: ['linux', 'macos', 'windows'],
+          style: 'block',
+          tooltip: {
+            title: 'CIBW_TEST_COMMAND',
+            tag: 'Optional step',
+            description: 'Execute a shell command to test each built wheel'
+          },
+        },
+      ],
+      [
+        {
+          label: 'Copy wheels out of container',
+          platforms: ['linux'],
+          style: 'block',
+          width: 2,
+        },
+      ],
+      [],
+    ]
+  }
+
+  const diagramComponent = new Vue({
+    el: '#flow-diagram',
+    data() {
+      return {
+        diagram,
+        platforms: ['linux', 'macos', 'windows'],
+      }
+    },
+    methods: {
+      blockStyle(action) {
+        let start, end
+        if (action.platforms.includes('linux')) {
+          start = 3
+        } else if (action.platforms.includes('macos')) {
+          start = 4
+        } else if (action.platforms.includes('windows')) {
+          start = 5
+        }
+
+        if (action.platforms.includes('windows')) {
+          end = 6
+        } else if (action.platforms.includes('macos')) {
+          end = 5
+        } else if (action.platforms.includes('linux')) {
+          end = 4
+        }
+
+        return {
+          gridRowStart: start.toString(),
+          gridRowEnd: end.toString(),
+          gridColumnEnd: `span ${action.width || 1}`,
+        }
+      }
+    },
+    computed: {
+      gridStyle() {
+        return {
+          gridTemplateRows: `auto auto repeat(${this.platforms.length}, 1fr)`,
+          gridTemplateColumns: `repeat(${this.diagram.steps.length+1}, auto)`,
+        }
+      },
+    },
+    directives: {
+      info: {
+        inserted(el, binding) {
+          const action = binding.value
+          const {env, label, optional=false, description='', href=''} = action
+          const tooltip = action.tooltip
+
+          if (tooltip) {
+            const tippyInstance = tippy(el, {
+              content: `
+                <a class="tooltip-contents" href="${href || ''}">
+                  <div class="tooltip-title">
+                    ${tooltip.title || ''}
+                  </div>
+                  <div class="tooltip-tag">
+                    ${tooltip.tag || ''}
+                  </div>
+                  <div class="tooltip-description">
+                    ${tooltip.description}
+                  </div>
+                </a>
+              `,
+              placement: 'right-start',
+              allowHTML: true,
+              maxWidth: 'none',
+              appendTo: document.getElementById('flow-diagram'),
+              offset: [0, 10],
+              onShow(instance) {
+                const stepEl = el.closest('.action')
+                stepEl.classList.add('tooltip-open')
+                instance.setProps({
+                  interactive: tippy.currentInput.isTouch
+                })
+              },
+              onHide() {
+                const stepEl = el.closest('.action')
+                stepEl.classList.remove('tooltip-open')
+              }
+            })
+
+            el.addEventListener('click', e => {
+              // click event should just open the tooltip on touch devices
+              if (tippy.currentInput.isTouch) {
+                e.preventDefault()
+              }
+            })
+          }
+        }
+      }
+    }
+  })
+</script>
+
+<style>
+  #flow-diagram {
+    background: #fcfcfc;
+    /* font-family: Inter; */
+    /* font-size: 10px; */
+    font-size: 0.7em;
+    padding-bottom: 2em;
+  }
+  .no-js #flow-diagram {
+    display: none
+  }
+  .diagram-grid {
+    display: grid;
+    overflow-x: auto;
+  }
+  .platform, .step, .dots, .block-container, .action {
+    display: contents;
+  }
+  .block, .dot {
+    position: relative;
+    margin: 2em 0.5em;
+  }
+  .block {
+    background-color: #eee;
+    /* margin: 0.5em auto; */
+    padding: 0.5em;
+    max-width: 6em;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    text-align: center;
+  }
+  .dot {
+    /* margin: 0.5em; */
+    display: flex;
+    align-items: center;
+    justify-content: center;
+  }
+  .dot-graphic {
+    width: 1.3em;
+    height: 1.3em;
+    border-radius: 50%;
+    background: #DADADA;
+  }
+  a.action {
+    color: inherit;
+  }
+  .action.tooltip-open .dot-graphic {
+    background-color: #416EDA;
+  }
+  .action.tooltip-open .block {
+    background-color: #416EDA;
+    color: white;
+  }
+  .grid-column-label {
+    height: 2em;
+    position: relative;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    margin: 0 0.5em;
+  }
+  .grid-column-label::before {
+    content: "";
+    height: 1px;
+    background-color: currentColor;
+    position: absolute;
+    top: calc(50% - 0.5px);
+    left: 0;
+    right: 0;
+  }
+  .grid-column-label .label {
+    background: #fcfcfc;
+    padding: 0 2em;
+    position: relative;
+  }
+  .grid-row-label {
+    grid-column: 1 / span 1;
+    display: flex;
+    align-items: center;
+    justify-content: flex-end;
+    text-align: right;
+    background: #fcfcfc;
+    position: relative;
+    padding-right: 1em;
+    font-size: 1.1em;
+  }
+  .grid-line {
+    grid-column: 1 / -1;
+    grid-row-end: span 1;
+    position: relative;
+  }
+  .grid-line::after {
+    content: "";
+    height: 1px;
+    background-color: #979797;
+    position: absolute;
+    top: calc(50% - 1px);
+    left: 0;
+    right: 0;
+  }
+  .grid-outline {
+    grid-row-end: span 1;
+    position: relative;
+    color: #8f8f8f;
+  }
+  .grid-outline.docker {
+    grid-row: 3 / span 1;
+    grid-column: 3 / -2;
+  }
+  .grid-outline.testVenv {
+    grid-column: 8 / span 4;
+  }
+  .grid-outline .outline {
+    position: absolute;
+    border: 1px solid #e5e5e5;
+    padding: 1px 3px;
+  }
+  .grid-outline.docker .outline  {
+    left: 0;
+    right: 0;
+    top: 0;
+    bottom: 0;
+  }
+  .grid-outline.testVenv .outline  {
+    left: 0;
+    right: 0;
+    top: 0.5em;
+    bottom: 0.5em;
+  }
+
+  /* style the tooltip */
+  .tippy-box {
+    background: white;
+    box-shadow: 0 2px 6px -1px rgba(0,0,0,0.12);
+    border-radius: 0;
+    text-align: left;
+    font-size: 1em;
+    color: #1F1F1F;
+    border: 1px solid rgba(0, 0, 0, 0.02);
+    width: 14em;
+    min-width: min-content;
+  }
+  .tippy-box[data-placement^='top'] > .tippy-arrow::before {
+    border-top-color: white;
+  }
+  .tippy-box[data-placement^='bottom'] > .tippy-arrow::before {
+    border-bottom-color: white;
+  }
+  .tippy-box[data-placement^='left'] > .tippy-arrow::before {
+    border-left-color: white;
+  }
+  .tippy-box[data-placement^='right'] > .tippy-arrow::before {
+    border-right-color: white;
+  }
+  a.tooltip-contents {
+    color: inherit;
+    text-decoration: none;
+    display: block;
+  }
+  .tooltip-title {
+    font-weight: 600;
+    font-size: 1.1em;
+    color: #416EDA;
+  }
+  .tooltip-tag {
+    font-weight: 500;
+    text-transform: uppercase;
+    font-size: 0.9em;
+    color: #C9C9C9;
+  }
+  .tooltip-description {
+    margin-top: 1px;
+    margin-bottom: 2px;
+  }
+</style>

docs/extra.css

@@ -3,6 +3,7 @@
 
 body {
     overflow-wrap: break-word;
+    overflow-x: hidden;
 }
 
 p {

docs/faq.md

@@ -4,15 +4,15 @@ title: Tips and tricks
 
 ## Tips
 
-### Linux builds on Docker
+### Linux builds in containers
 
-Linux wheels are built in the [`manylinux`/`musllinux` docker images](https://github.com/pypa/manylinux) to provide binary compatible wheels on Linux, according to [PEP 600](https://www.python.org/dev/peps/pep-0600/) / [PEP 656](https://www.python.org/dev/peps/pep-0656/). Because of this, when building with `cibuildwheel` on Linux, a few things should be taken into account:
+Linux wheels are built in [`manylinux`/`musllinux` containers](https://github.com/pypa/manylinux) to provide binary compatible wheels on Linux, according to [PEP 600](https://www.python.org/dev/peps/pep-0600/) / [PEP 656](https://www.python.org/dev/peps/pep-0656/). Because of this, when building with `cibuildwheel` on Linux, a few things should be taken into account:
 
--   Programs and libraries are not installed on the CI runner host, but rather should be installed inside of the Docker image - using `yum` for `manylinux2010` or `manylinux2014`, `apt-get` for `manylinux_2_24` and `apk` for `musllinux_1_1`, or manually. The same goes for environment variables that are potentially needed to customize the wheel building.
+-   Programs and libraries are not installed on the CI runner host, but rather should be installed inside the container - using `yum` for `manylinux2010` or `manylinux2014`, `apt-get` for `manylinux_2_24` and `apk` for `musllinux_1_1`, or manually. The same goes for environment variables that are potentially needed to customize the wheel building.
 
-    `cibuildwheel` supports this by providing the [`CIBW_ENVIRONMENT`](options.md#environment) and [`CIBW_BEFORE_ALL`](options.md#before-all) options to setup the build environment inside the running Docker image.
+    `cibuildwheel` supports this by providing the [`CIBW_ENVIRONMENT`](options.md#environment) and [`CIBW_BEFORE_ALL`](options.md#before-all) options to setup the build environment inside the running container.
 
--   The project directory is mounted in the running Docker instance as `/project`, the output directory for the wheels as `/output`. In general, this is handled transparently by `cibuildwheel`. For a more finegrained level of control however, the root of the host file system is mounted as `/host`, allowing for example to access shared files, caches, etc. on the host file system.  Note that `/host` is not available on CircleCI due to their Docker policies.
+-   The project directory is mounted inside the container as `/project`, the output directory for the wheels as `/output`. In general, this is handled transparently by `cibuildwheel`. For a more finegrained level of control however, the root of the host file system is mounted as `/host`, allowing for example to access shared files, caches, etc. on the host file system.  Note that `/host` is not available on CircleCI due to their Docker policies.
 
 -   Alternative Docker images can be specified with the `CIBW_MANYLINUX_*_IMAGE`/`CIBW_MUSLLINUX_*_IMAGE` options to allow for a custom, preconfigured build environment for the Linux builds. See [options](options.md#linux-image) for more details.
 
@@ -103,6 +103,12 @@ Linux), and the other architectures are emulated automatically.
 {% include "../examples/github-with-qemu.yml" %}
 ```
 
+### Building CPython ABI3 wheels (Limited API) {: #abi3}
+
+The CPython Limited API is a subset of the Python C Extension API that's declared to be forward-compatible, meaning you can compile wheels for one version of Python, and they'll be compatible with future versions. Wheels that use the Limited API are known as ABI3 wheels.
+
+To create a package that builds ABI3 wheels, you'll need to configure your build backend to compile libraries correctly create wheels with the right tags. [Check this repo](https://github.com/joerick/python-abi3-package-sample) for an example of how to do this with setuptools.
+
 ### Building packages with optional C extensions
 
 `cibuildwheel` defines the environment variable `CIBUILDWHEEL` to the value `1` allowing projects for which the C extension is optional to make it mandatory when building wheels.
@@ -127,7 +133,7 @@ There are two suggested methods for keeping cibuildwheel up to date that instead
 If you use GitHub Actions for builds, you can use cibuildwheel as an action:
 
 ```yaml
-uses: pypa/cibuildwheel@v2.4.0
+uses: pypa/cibuildwheel@v2.8.1
 ```
 
 This is a composite step that just runs cibuildwheel using pipx. You can set command-line options as `with:` parameters, and use `env:` as normal.
@@ -141,10 +147,6 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
-    ignore:
-      # Optional: Official actions have moving tags like v1;
-      # if you use those, you don't need updates.
-      - dependency-name: "actions/*"
 ```
 
 #### Option 2: Requirement files
@@ -153,7 +155,7 @@ The second option, and the only one that supports other CI systems, is using a `
 
 ```bash
 # requirements-cibw.txt
-cibuildwheel==2.4.0
+cibuildwheel==2.8.1
 ```
 
 Then your install step would have `python -m pip install -r requirements-cibw.txt` in it. Your `.github/dependabot.yml` file could look like this:
@@ -179,7 +181,7 @@ package 'sdist' will also benefit.
 
 #### Missing build dependencies {: #cibw-options-alternatives-deps}
 
-If your build needs Python dependencies, rather than using CIBW_BEFORE_BUILD, it's best to add these to the
+If your build needs Python dependencies, rather than using `CIBW_BEFORE_BUILD`, it's best to add these to the
 [`build-system.requires`](https://www.python.org/dev/peps/pep-0518/#build-system-table)
 section of your pyproject.toml. For example, if your project requires Cython
 to build, your pyproject.toml might include a section like this:
@@ -201,35 +203,35 @@ You might need to run some other commands before building, like running a
 script that performs codegen or downloading some data that's not stored in
 your source tree.
 
-Rather than using CIBW_BEFORE_ALL or CIBW_BEFORE_BUILD, you could incorporate
+Rather than using `CIBW_BEFORE_ALL` or `CIBW_BEFORE_BUILD`, you could incorporate
 these steps into your package's build process. For example, if you're using
 setuptools, you can add steps to your package's `setup.py` using a structure
 like this:
 
-    ```python
-    import subprocess
-    import setuptools
-    import setuptools.command.build_py
+```python
+import subprocess
+import setuptools
+import setuptools.command.build_py
 
 
-    class BuildPyCommand(setuptools.command.build_py.build_py):
-      """Custom build command."""
+class BuildPyCommand(setuptools.command.build_py.build_py):
+    """Custom build command."""
 
-      def run(self):
+    def run(self):
         # your custom build steps here
         # e.g.
         #   subprocess.run(['python', 'scripts/my_custom_script.py'], check=True)
         setuptools.command.build_py.build_py.run(self)
 
 
-    setuptools.setup(
-        cmdclass={
-            'build_py': BuildPyCommand,
-        },
-        # Usual setup() args.
-        # ...
-    )
-    ```
+setuptools.setup(
+    cmdclass={
+        'build_py': BuildPyCommand,
+    },
+    # Usual setup() args.
+    # ...
+)
+```
 
 #### Compiler flags
 
@@ -309,7 +311,7 @@ See [#816](https://github.com/pypa/cibuildwheel/issues/816), thanks to @phoeriou
 
 Visual Studio and MSVC link the compiled binary wheels to the Microsoft Visual C++ Runtime. Normally, these are included with Python, but when compiling with a newer version of Visual Studio, it is possible users will run into problems on systems that do not have these runtime libraries installed. The solution is to ask users to download the corresponding Visual C++ Redistributable from the [Microsoft website](https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads) and install it. Since a Python installation normally includes these VC++ Redistributable files for [the version of the MSVC compiler used to compile Python](https://wiki.python.org/moin/WindowsCompilers), this is typically only a problem when compiling a Python C extension with a newer compiler.
 
-Additionally, Visual Studio 2019 started linking to an even newer DLL, `VCRUNTIME140_1.dll`, besides the `VCRUNTIME140.dll` that is included with recent Python versions (starting from Python 3.5; see [here](https://wiki.python.org/moin/WindowsCompilers) for more details on the corresponding Visual Studio & MSVC versions used to compile the different Python versions). To avoid this extra dependency on `VCRUNTIME140_1.dll`, the [`/d2FH4-` flag](https://devblogs.microsoft.com/cppblog/making-cpp-exception-handling-smaller-x64/) can be added to the MSVC invocations (check out [this issue](https://github.com/pypa/cibuildwheel/issues/423) for details and references).
+Additionally, Visual Studio 2019 started linking to an even newer DLL, `VCRUNTIME140_1.dll`, besides the `VCRUNTIME140.dll` that is included with recent Python versions (starting from Python 3.5; see [here](https://wiki.python.org/moin/WindowsCompilers) for more details on the corresponding Visual Studio & MSVC versions used to compile the different Python versions). To avoid this extra dependency on `VCRUNTIME140_1.dll`, the [`/d2FH4-` flag](https://devblogs.microsoft.com/cppblog/making-cpp-exception-handling-smaller-x64/) can be added to the MSVC invocations (check out [this issue](https://github.com/pypa/cibuildwheel/issues/423) for details and references). CPython 3.8.3 and all versions after it have this extra DLL, so it is only needed for 3.8 and earlier.
 
 To add the `/d2FH4-` flag to a standard `setup.py` using `setuptools`, the `extra_compile_args` option can be used:
 

docs/index.md

@@ -9,3 +9,14 @@ title: Home
 %}
 
 To get started, head over to the [setup guide](setup.md).
+
+How it works
+------------
+
+This diagram summarises the steps that cibuildwheel takes on each platform to build your package's wheels.
+
+{%
+   include-markdown "diagram.md"
+%}
+
+This isn't exhaustive, for a full list of the things cibuildwheel can do, check the [options](options.md) page.

docs/options.md

@@ -117,9 +117,9 @@ matches overriding earlier ones if multiple selectors match. Environment
 variables always override static configuration.
 
 A few of the options below have special handling in overrides. A different
-`before-all` will trigger a new docker launch on Linux, and cannot be
+`before-all` will trigger a new container to launch on Linux, and cannot be
 overridden on macOS or Windows.  Overriding the image on linux will also
-generate new docker launches, one per image.  Some commands are not supported;
+trigger new containers, one per image. Some commands are not supported;
 `output-dir`, build/skip/test_skip selectors, and architectures cannot be
 overridden.
 
@@ -174,7 +174,7 @@ Default: `auto`
 
 `auto` will auto-detect platform using environment variables, such as `TRAVIS_OS_NAME`/`APPVEYOR`/`CIRCLECI`.
 
-- For `linux`, you need Docker running, on Linux, macOS, or Windows.
+- For `linux`, you need [Docker or Podman](#container-engine) running, on Linux, macOS, or Windows.
 - For `macos` and `windows`, you need to be running on the respective system, with a working compiler toolchain installed - Xcode Command Line tools for macOS, and MSVC for Windows.
 
 This option can also be set using the [command-line option](#command-line) `--platform`. This option is not available in the `pyproject.toml` config.
@@ -202,16 +202,17 @@ When setting the options, you can use shell-style globbing syntax, as per [fnmat
 
 <div class="build-id-table-marker"></div>
 
-|              | macOS                                                                  | Windows                          | Linux Intel                                                                                         | Linux Other                                                                                                                                                     |
-|--------------|------------------------------------------------------------------------|----------------------------------|-----------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| Python 3.6   | cp36-macosx_x86_64                                                     | cp36-win_amd64<br/>cp36-win32    | cp36-manylinux_x86_64<br/>cp36-manylinux_i686<br/>cp36-musllinux_x86_64<br/>cp36-musllinux_i686     | cp36-manylinux_aarch64<br/>cp36-manylinux_ppc64le<br/>cp36-manylinux_s390x<br/>cp36-musllinux_aarch64<br/>cp36-musllinux_ppc64le<br/>cp36-musllinux_s390x       |
-| Python 3.7   | cp37-macosx_x86_64                                                     | cp37-win_amd64<br/>cp37-win32    | cp37-manylinux_x86_64<br/>cp37-manylinux_i686<br/>cp37-musllinux_x86_64<br/>cp37-musllinux_i686     | cp37-manylinux_aarch64<br/>cp37-manylinux_ppc64le<br/>cp37-manylinux_s390x<br/>cp37-musllinux_aarch64<br/>cp37-musllinux_ppc64le<br/>cp37-musllinux_s390x       |
-| Python 3.8   | cp38-macosx_x86_64<br/>cp38-macosx_universal2<br/>cp38-macosx_arm64    | cp38-win_amd64<br/>cp38-win32    | cp38-manylinux_x86_64<br/>cp38-manylinux_i686<br/>cp38-musllinux_x86_64<br/>cp38-musllinux_i686     | cp38-manylinux_aarch64<br/>cp38-manylinux_ppc64le<br/>cp38-manylinux_s390x<br/>cp38-musllinux_aarch64<br/>cp38-musllinux_ppc64le<br/>cp38-musllinux_s390x       |
+|              | macOS                                                                  | Windows                                             | Linux Intel                                                                                         | Linux Other                                                                                                                                                     |
+|--------------|------------------------------------------------------------------------|-----------------------------------------------------|-----------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| Python 3.6   | cp36-macosx_x86_64                                                     | cp36-win_amd64<br/>cp36-win32                       | cp36-manylinux_x86_64<br/>cp36-manylinux_i686<br/>cp36-musllinux_x86_64<br/>cp36-musllinux_i686     | cp36-manylinux_aarch64<br/>cp36-manylinux_ppc64le<br/>cp36-manylinux_s390x<br/>cp36-musllinux_aarch64<br/>cp36-musllinux_ppc64le<br/>cp36-musllinux_s390x       |
+| Python 3.7   | cp37-macosx_x86_64                                                     | cp37-win_amd64<br/>cp37-win32                       | cp37-manylinux_x86_64<br/>cp37-manylinux_i686<br/>cp37-musllinux_x86_64<br/>cp37-musllinux_i686     | cp37-manylinux_aarch64<br/>cp37-manylinux_ppc64le<br/>cp37-manylinux_s390x<br/>cp37-musllinux_aarch64<br/>cp37-musllinux_ppc64le<br/>cp37-musllinux_s390x       |
+| Python 3.8   | cp38-macosx_x86_64<br/>cp38-macosx_universal2<br/>cp38-macosx_arm64    | cp38-win_amd64<br/>cp38-win32                       | cp38-manylinux_x86_64<br/>cp38-manylinux_i686<br/>cp38-musllinux_x86_64<br/>cp38-musllinux_i686     | cp38-manylinux_aarch64<br/>cp38-manylinux_ppc64le<br/>cp38-manylinux_s390x<br/>cp38-musllinux_aarch64<br/>cp38-musllinux_ppc64le<br/>cp38-musllinux_s390x       |
 | Python 3.9   | cp39-macosx_x86_64<br/>cp39-macosx_universal2<br/>cp39-macosx_arm64    | cp39-win_amd64<br/>cp39-win32<br/>cp39-win_arm64    | cp39-manylinux_x86_64<br/>cp39-manylinux_i686<br/>cp39-musllinux_x86_64<br/>cp39-musllinux_i686     | cp39-manylinux_aarch64<br/>cp39-manylinux_ppc64le<br/>cp39-manylinux_s390x<br/>cp39-musllinux_aarch64<br/>cp39-musllinux_ppc64le<br/>cp39-musllinux_s390x       |
-| Python 3.10  | cp310-macosx_x86_64<br/>cp310-macosx_universal2<br/>cp310-macosx_arm64 | cp310-win_amd64<br/>cp310-win32<br/>cp310-win_arm64   | cp310-manylinux_x86_64<br/>cp310-manylinux_i686<br/>cp310-musllinux_x86_64<br/>cp310-musllinux_i686 | cp310-manylinux_aarch64<br/>cp310-manylinux_ppc64le<br/>cp310-manylinux_s390x<br/>cp310-musllinux_aarch64<br/>cp310-musllinux_ppc64le<br/>cp310-musllinux_s390x |
-| PyPy3.7 v7.3 | pp37-macosx_x86_64                                                     | pp37-win_amd64                   | pp37-manylinux_x86_64<br/>pp37-manylinux_i686                                                       | pp37-manylinux_aarch64                                                                                                                                          |
-| PyPy3.8 v7.3 | pp38-macosx_x86_64                                                     | pp38-win_amd64                   | pp38-manylinux_x86_64<br/>pp38-manylinux_i686                                                       | pp38-manylinux_aarch64                                                                                                                                          |
-| PyPy3.9 v7.3 | pp39-macosx_x86_64                                                     | pp39-win_amd64                   | pp39-manylinux_x86_64<br/>pp39-manylinux_i686                                                       | pp39-manylinux_aarch64                                                                                                                                          |
+| Python 3.10  | cp310-macosx_x86_64<br/>cp310-macosx_universal2<br/>cp310-macosx_arm64 | cp310-win_amd64<br/>cp310-win32<br/>cp310-win_arm64 | cp310-manylinux_x86_64<br/>cp310-manylinux_i686<br/>cp310-musllinux_x86_64<br/>cp310-musllinux_i686 | cp310-manylinux_aarch64<br/>cp310-manylinux_ppc64le<br/>cp310-manylinux_s390x<br/>cp310-musllinux_aarch64<br/>cp310-musllinux_ppc64le<br/>cp310-musllinux_s390x |
+| Python 3.11  | cp311-macosx_x86_64<br/>cp311-macosx_universal2<br/>cp311-macosx_arm64 | cp311-win_amd64<br/>cp311-win32<br/>cp311-win_arm64 | cp311-manylinux_x86_64<br/>cp311-manylinux_i686<br/>cp311-musllinux_x86_64<br/>cp311-musllinux_i686 | cp311-manylinux_aarch64<br/>cp311-manylinux_ppc64le<br/>cp311-manylinux_s390x<br/>cp311-musllinux_aarch64<br/>cp311-musllinux_ppc64le<br/>cp311-musllinux_s390x |
+| PyPy3.7 v7.3 | pp37-macosx_x86_64                                                     | pp37-win_amd64                                      | pp37-manylinux_x86_64<br/>pp37-manylinux_i686                                                       | pp37-manylinux_aarch64                                                                                                                                          |
+| PyPy3.8 v7.3 | pp38-macosx_x86_64                                                     | pp38-win_amd64                                      | pp38-manylinux_x86_64<br/>pp38-manylinux_i686                                                       | pp38-manylinux_aarch64                                                                                                                                          |
+| PyPy3.9 v7.3 | pp39-macosx_x86_64                                                     | pp39-win_amd64                                      | pp39-manylinux_x86_64<br/>pp39-manylinux_i686                                                       | pp39-manylinux_aarch64                                                                                                                                          |
 
 The list of supported and currently selected build identifiers can also be retrieved by passing the `--print-build-identifiers` flag to cibuildwheel.
 The format is `python_tag-platform_tag`, with tags similar to those in [PEP 425](https://www.python.org/dev/peps/pep-0425/#details).
@@ -522,7 +523,7 @@ Choose which build backend to use. Can either be "pip", which will run
 
 A list of environment variables to set during the build. Bash syntax should be used, even on Windows.
 
-You must set this variable to pass variables to Linux builds (since they execute in a Docker container). It also works for the other platforms.
+You must set this variable to pass variables to Linux builds (since they execute in a container). It also works for the other platforms.
 
 You can use `$PATH` syntax to insert other variables, or the `$(pwd)` syntax to insert the output of other shell commands.
 
@@ -552,6 +553,10 @@ Platform-specific environment variables are also available:<br/>
     # Supply options to `pip` to affect how it downloads dependencies
     CIBW_ENVIRONMENT: PIP_EXTRA_INDEX_URL=https://pypi.myorg.com/simple
 
+    # Any pip command-line options can be set using the PIP_ prefix
+    # https://pip.pypa.io/en/stable/topics/configuration/#environment-variables
+    CIBW_ENVIRONMENT: PIP_GLOBAL_OPTION="build_ext -j4"
+
     # Set two flags on linux only
     CIBW_ENVIRONMENT_LINUX: BUILD_TIME="$(date)" SAMPLE_TEXT="sample text"
     ```
@@ -581,6 +586,10 @@ Platform-specific environment variables are also available:<br/>
     # Supply options to `pip` to affect how it downloads dependencies
     environment = { PIP_EXTRA_INDEX_URL="https://pypi.myorg.com/simple" }
 
+    # Any pip command-line option can be set using the PIP_ prefix
+    # https://pip.pypa.io/en/stable/topics/configuration/#environment-variables
+    environment = { PIP_GLOBAL_OPTION="build_ext -j4" }
+
     # Set two flags on linux only
     [tool.cibuildwheel.linux]
     environment = { BUILD_TIME="$(date)", SAMPLE_TEXT="sample text" }
@@ -634,21 +643,25 @@ To specify more than one environment variable, separate the variable names by sp
 ### `CIBW_BEFORE_ALL` {: #before-all}
 > Execute a shell command on the build system before any wheels are built.
 
-Shell command to prepare a common part of the project (e.g. build or install libraries which does not depend on the specific version of Python).
+Shell command that runs before any builds are run, to build or install parts that do not depend on the specific version of Python.
 
-This option is very useful for the Linux build, where builds take place in isolated Docker containers managed by cibuildwheel. This command will run inside the container before the wheel builds start. Note, if you're building both `x86_64` and `i686` wheels (the default), your build uses two different Docker images. In that case, this command will execute twice - once per build container.
+This option is very useful for the Linux build, where builds take place in isolated containers managed by cibuildwheel. This command will run inside the container before the wheel builds start. Note, if you're building both `x86_64` and `i686` wheels (the default), your build uses two different container images. In that case, this command will execute twice - once per build container.
 
 The placeholder `{package}` can be used here; it will be replaced by the path to the package being built by cibuildwheel.
 
 On Windows and macOS, the version of Python available inside `CIBW_BEFORE_ALL` is whatever is available on the host machine. On Linux, a modern Python version is available on PATH.
 
 This option has special behavior in the overrides section in `pyproject.toml`.
-On linux, overriding it triggers a new docker launch. It cannot be overridden
+On linux, overriding it triggers a new container launch. It cannot be overridden
 on macOS and Windows.
 
 Platform-specific environment variables also available:<br/>
 `CIBW_BEFORE_ALL_MACOS` | `CIBW_BEFORE_ALL_WINDOWS` | `CIBW_BEFORE_ALL_LINUX`
 
+!!! note
+
+    This command is executed in a different Python environment from the builds themselves. So you can't `pip install` a Python dependency in CIBW_BEFORE_ALL and use it in the build. Instead, look at [`CIBW_BEFORE_BUILD`](#before-build), or, if your project uses pyproject.toml, the [build-system.requires](https://peps.python.org/pep-0518/#build-system-table) field.
+
 #### Examples
 
 !!! tab examples "Environment variables"
@@ -691,9 +704,9 @@ Platform-specific environment variables also available:<br/>
 
     In configuration files, you can use a TOML array, and each line will be run sequentially - joined with `&&`.
 
-Note that manylinux2_24 builds occur inside a Debian9 docker, where
+Note that manylinux_2_24 builds occur inside a Debian9 docker, where
 manylinux2010 and manylinux2014 builds occur inside a CentOS one. So for
-`manylinux2_24` the `CIBW_BEFORE_ALL_LINUX` command must use `apt-get -y`
+`manylinux_2_24` the `CIBW_BEFORE_ALL_LINUX` command must use `apt-get -y`
 instead.
 
 ### `CIBW_BEFORE_BUILD` {: #before-build}
@@ -783,7 +796,7 @@ Platform-specific environment variables are also available:<br/>
 
 
 ### `CIBW_REPAIR_WHEEL_COMMAND` {: #repair-wheel-command}
-> Execute a shell command to repair each (non-pure Python) built wheel
+> Execute a shell command to repair each built wheel
 
 Default:
 
@@ -865,7 +878,7 @@ Platform-specific environment variables are also available:<br/>
 <div class="link-target" id="manylinux-image"></div>
 
 ### `CIBW_MANYLINUX_*_IMAGE`, `CIBW_MUSLLINUX_*_IMAGE` {: #linux-image}
-> Specify alternative manylinux / musllinux Docker images
+> Specify alternative manylinux / musllinux container images
 
 The available options are (default value):
 
@@ -885,16 +898,16 @@ The available options are (default value):
 
 Set an alternative Docker image to be used for building [manylinux / musllinux](https://github.com/pypa/manylinux) wheels.
 
-For `CIBW_MANYLINUX_*_IMAGE`, the value of this option can either be set to `manylinux1`, `manylinux2010`, `manylinux2014` or `manylinux_2_24` to use a pinned version of the [official manylinux images](https://github.com/pypa/manylinux). Alternatively, set these options to any other valid Docker image name. For PyPy, the `manylinux1` image is not available. For architectures other
-than x86 (x86\_64 and i686) `manylinux2014` or `manylinux_2_24` must be used, because the first version of the manylinux specification that supports additional architectures is `manylinux2014`.
+For `CIBW_MANYLINUX_*_IMAGE`, the value of this option can either be set to `manylinux1`, `manylinux2010`, `manylinux2014`, `manylinux_2_24` or `manylinux_2_28` to use a pinned version of the [official manylinux images](https://github.com/pypa/manylinux). Alternatively, set these options to any other valid Docker image name. For PyPy, the `manylinux1` image is not available. For architectures other
+than x86 (x86\_64 and i686) `manylinux2014`, `manylinux_2_24` or `manylinux_2_28` must be used, because the first version of the manylinux specification that supports additional architectures is `manylinux2014`. `manylinux_2_28` is not supported for `i686` & `s390x` architectures.
 
 For `CIBW_MUSLLINUX_*_IMAGE`, the value of this option can either be set to `musllinux_1_1` to use a pinned version of the [official musllinux images](https://github.com/pypa/musllinux). Alternatively, set these options to any other valid Docker image name.
 
 If this option is blank, it will fall though to the next available definition (environment variable -> pyproject.toml -> default).
 
-If setting a custom Docker image, you'll need to make sure it can be used in the same way as the official, default Docker images: all necessary Python and pip versions need to be present in `/opt/python/`, and the auditwheel tool needs to be present for cibuildwheel to work. Apart from that, the architecture and relevant shared system libraries need to be compatible to the relevant standard to produce valid manylinux1/manylinux2010/manylinux2014/manylinux_2_24/musllinux_1_1 wheels (see [pypa/manylinux on GitHub](https://github.com/pypa/manylinux), [PEP 513](https://www.python.org/dev/peps/pep-0513/), [PEP 571](https://www.python.org/dev/peps/pep-0571/), [PEP 599](https://www.python.org/dev/peps/pep-0599/), [PEP 600](https://www.python.org/dev/peps/pep-0600/) and [PEP 656](https://www.python.org/dev/peps/pep-0656/) for more details).
+If setting a custom image, you'll need to make sure it can be used in the same way as the default images: all necessary Python and pip versions need to be present in `/opt/python/`, and the auditwheel tool needs to be present for cibuildwheel to work. Apart from that, the architecture and relevant shared system libraries need to be compatible to the relevant standard to produce valid manylinux1/manylinux2010/manylinux2014/manylinux_2_24/manylinux_2_28/musllinux_1_1 wheels (see [pypa/manylinux on GitHub](https://github.com/pypa/manylinux), [PEP 513](https://www.python.org/dev/peps/pep-0513/), [PEP 571](https://www.python.org/dev/peps/pep-0571/), [PEP 599](https://www.python.org/dev/peps/pep-0599/), [PEP 600](https://www.python.org/dev/peps/pep-0600/) and [PEP 656](https://www.python.org/dev/peps/pep-0656/) for more details).
 
-Auditwheel detects the version of the manylinux / musllinux standard in the Docker image through the `AUDITWHEEL_PLAT` environment variable, as cibuildwheel has no way of detecting the correct `--plat` command line argument to pass to auditwheel for a custom image. If a Docker image does not correctly set this `AUDITWHEEL_PLAT` environment variable, the `CIBW_ENVIRONMENT` option can be used to do so (e.g., `CIBW_ENVIRONMENT='AUDITWHEEL_PLAT="manylinux2010_$(uname -m)"'`).
+Auditwheel detects the version of the manylinux / musllinux standard in the image through the `AUDITWHEEL_PLAT` environment variable, as cibuildwheel has no way of detecting the correct `--plat` command line argument to pass to auditwheel for a custom image. If a custom image does not correctly set this `AUDITWHEEL_PLAT` environment variable, the `CIBW_ENVIRONMENT` option can be used to do so (e.g., `CIBW_ENVIRONMENT='AUDITWHEEL_PLAT="manylinux2010_$(uname -m)"'`).
 
 #### Examples
 
@@ -955,6 +968,44 @@ Auditwheel detects the version of the manylinux / musllinux standard in the Dock
     Like any other option, these can be placed in `[tool.cibuildwheel.linux]`
     if you prefer; they have no effect on `macos` and `windows`.
 
+
+### `CIBW_CONTAINER_ENGINE` {: #container-engine}
+> Specify which container engine to use when building Linux wheels
+
+Options: `docker` `podman`
+
+Default: `docker`
+
+Set the container engine to use. Docker is the default, or you can switch to
+[Podman](https://podman.io/). To use Docker, you need to have a Docker daemon
+running and `docker` available on PATH. To use Podman, it needs to be
+installed and `podman` available on PATH.
+
+!!! tip
+
+    While most users will stick with Docker, Podman is available in different
+    contexts - for example, it can be run inside a Docker container, or without
+    root access. Thanks to the [OCI], images are compatible between engines, so
+    you can still use the regular manylinux/musllinux containers.
+
+[OCI]: https://opencontainers.org/
+
+#### Examples
+
+!!! tab examples "Environment variables"
+
+    ```yaml
+    CIBW_CONTAINER_ENGINE: podman
+    ```
+
+!!! tab examples "pyproject.toml"
+
+    ```toml
+    [tool.cibuildwheel]
+    container-engine = "podman"
+    ```
+
+
 ### `CIBW_DEPENDENCY_VERSIONS` {: #dependency-versions}
 > Specify how cibuildwheel controls the versions of the tools it uses
 
@@ -1020,6 +1071,7 @@ Platform-specific environment variables are also available:<br/>
     dependency-versions = "./constraints.txt"
     ```
 
+
 ## Testing
 
 ### `CIBW_TEST_COMMAND` {: #test-command}

docs/setup.md

@@ -154,10 +154,9 @@ To build Linux, Mac, and Windows wheels using GitHub Actions, create a `.github/
     {% include "../examples/github-minimal.yml" %}
     ```
 
-
-    You can use `env:` with the action just like you would with `run:`; you can
-    also use `with:` to set the command line options: `package-dir: .` and
-    `output-dir: wheelhouse` (those values are the defaults).
+    Use `env:` to pass [build options](options.md) and `with:` to set
+    `package-dir: .`, `output-dir: wheelhouse` and `config-file: ''`
+    locations (those values are the defaults).
 
 !!! tab "pipx"
     The GitHub Actions runners have pipx installed, so you can easily build in
@@ -177,15 +176,15 @@ To build Linux, Mac, and Windows wheels using GitHub Actions, create a `.github/
         runs-on: ${{ matrix.os }}
         strategy:
           matrix:
-            os: [ubuntu-20.04, windows-2019, macos-10.15]
+            os: [ubuntu-20.04, windows-2019, macos-11]
 
         steps:
-          - uses: actions/checkout@v2
+          - uses: actions/checkout@v3
 
           - name: Build wheels
-            run: pipx run cibuildwheel==2.4.0
+            run: pipx run cibuildwheel==2.8.1
 
-          - uses: actions/upload-artifact@v2
+          - uses: actions/upload-artifact@v3
             with:
               path: ./wheelhouse/*.whl
     ```
@@ -209,21 +208,21 @@ To build Linux, Mac, and Windows wheels using GitHub Actions, create a `.github/
         runs-on: ${{ matrix.os }}
         strategy:
           matrix:
-            os: [ubuntu-20.04, windows-2019, macos-10.15]
+            os: [ubuntu-20.04, windows-2019, macos-11]
 
         steps:
-          - uses: actions/checkout@v2
+          - uses: actions/checkout@v3
 
           # Used to host cibuildwheel
-          - uses: actions/setup-python@v2
+          - uses: actions/setup-python@v3
 
           - name: Install cibuildwheel
-            run: python -m pip install cibuildwheel==2.4.0
+            run: python -m pip install cibuildwheel==2.8.1
 
           - name: Build wheels
             run: python -m cibuildwheel --output-dir wheelhouse
 
-          - uses: actions/upload-artifact@v2
+          - uses: actions/upload-artifact@v3
             with:
               path: ./wheelhouse/*.whl
     ```

docs/working-examples.md

@@ -9,31 +9,39 @@ title: Working examples
 | Name                              | CI | OS | Notes |
 |-----------------------------------|----|----|:------|
 | [scikit-learn][]                  | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | The machine learning library. A complex but clean config using many of cibuildwheel's features to build a large project with Cython and C++ extensions.  |
+| [NumPy][]                         | ![github icon][] ![travisci icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | The fundamental package for scientific computing with Python. |
 | [Tornado][]                       | ![travisci icon][] | ![apple icon][] ![linux icon][] | Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed. |
 | [pytorch-fairseq][]               | ![github icon][] | ![apple icon][] ![linux icon][] | Facebook AI Research Sequence-to-Sequence Toolkit written in Python. |
 | [Matplotlib][]                    | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | The venerable Matplotlib, a Python library with C++ portions |
-| [MyPy][]                          | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | MyPyC, the compiled component of MyPy. |
+| [NCNN][]                          | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | ncnn is a high-performance neural network inference framework optimized for the mobile platform |
+| [Kivy][]                          | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Open source UI framework written in Python, running on Windows, Linux, macOS, Android and iOS |
+| [Prophet][]                       | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Tool for producing high quality forecasts for time series data that has multiple seasonality with linear or non-linear growth. |
+| [MyPy][]                          | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | The compiled version of MyPy using MyPyC. |
 | [pydantic][]                      | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Data parsing and validation using Python type hints |
+| [MemRay][]                        | ![github icon][] | ![linux icon][] | Memray is a memory profiler for Python |
 | [uvloop][]                        | ![github icon][] | ![apple icon][] ![linux icon][] | Ultra fast asyncio event loop. |
 | [psutil][]                        | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Cross-platform lib for process and system monitoring in Python |
 | [vaex][]                          | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Out-of-Core hybrid Apache Arrow/NumPy DataFrame for Python, ML, visualization and exploration of big tabular data at a billion rows per second 🚀 |
 | [Google Benchmark][]              | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | A microbenchmark support library |
-| [Apache Beam][]                   | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Apache Beam is a unified programming model for Batch and Streaming |
+| [Apache Beam][]                   | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Apache Beam is a unified programming model for Batch and Streaming data processing. |
 | [asyncpg][]                       | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | A fast PostgreSQL Database Client Library for Python/asyncio. |
-| [scikit-image][]                  | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Image processing library. Uses cibuildwheel to build and test a project that uses Cython with platform-native code.  |
-| [cmake][]                         | ![github icon][] ![travisci icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Multitagged binary builds for all supported platforms, using cibw 2 config configuration. |
 | [duckdb][]                        | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | DuckDB is an in-process SQL OLAP Database Management System |
+| [scikit-image][]                  | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Image processing library. Uses cibuildwheel to build and test a project that uses Cython with platform-native code.  |
+| [PyGame][]                        | ![github icon][] | ![apple icon][] ![linux icon][] | pygame (the library) is a Free and Open Source python programming language library for making multimedia applications like games built on top of the excellent SDL library. C, Python, Native, OpenGL. |
+| [cmake][]                         | ![github icon][] ![travisci icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Multitagged binary builds for all supported platforms, using cibw 2 config configuration. |
 | [twisted-iocpsupport][]           | ![github icon][] | ![windows icon][] | A submodule of Twisted that hooks into native C APIs using Cython. |
 | [websockets][]                    | ![travisci icon][] | ![apple icon][] ![linux icon][] | Library for building WebSocket servers and clients. Mostly written in Python, with a small C 'speedups' extension module.  |
 | [cvxpy][]                         | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | A Python-embedded modeling language for convex optimization problems. |
 | [PyOxidizer][]                    | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | A modern Python application packaging and distribution tool |
 | [Triton][]                        | ![github icon][] | ![linux icon][] | Self hosted runners |
+| [UltraJSON][]                     | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Ultra fast JSON decoder and encoder written in C with Python bindings |
 | [River][]                         | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | 🌊 Online machine learning in Python |
 | [OpenSpiel][]                     | ![github icon][] | ![apple icon][] ![linux icon][] | OpenSpiel is a collection of environments and algorithms for research in general reinforcement learning and search/planning in games. |
 | [pyzmq][]                         | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Python bindings for zeromq, the networking library. Uses Cython and CFFI.  |
 | [aiortc][]                        | ![github icon][] | ![apple icon][] ![linux icon][] | WebRTC and ORTC implementation for Python using asyncio. |
 | [vispy][]                         | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Main repository for Vispy |
 | [Confluent client for Kafka][]    | ![travisci icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | setup in `tools/wheels/build-wheels.bat` |
+| [Implicit][]                      | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Includes GPU support for linux wheels |
 | [tinyobjloader][]                 | ![azurepipelines icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Tiny but powerful single file wavefront obj loader |
 | [Dependency Injector][]           | ![travisci icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Dependency injection framework for Python, uses Windows TravisCI |
 | [coverage.py][]                   | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | The coverage tool for Python |
@@ -41,12 +49,14 @@ title: Working examples
 | [PyYAML][]                        | ![github icon][] | ![apple icon][] | Canonical source repository for PyYAML |
 | [numexpr][]                       | ![github icon][] ![travisci icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Fast numerical array expression evaluator for Python, NumPy, PyTables, pandas, bcolz and more |
 | [h5py][]                          | ![azurepipelines icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | HDF5 for Python -- The h5py package is a Pythonic interface to the HDF5 binary data format. |
+| [Wrapt][]                         | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | A Python module for decorators, wrappers and monkey patching. |
 | [PyAV][]                          | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Pythonic bindings for FFmpeg's libraries. |
+| [SimpleJSON][]                    | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | simplejson is a simple, fast, extensible JSON encoder/decoder for Python  |
+| [pikepdf][]                       | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | A Python library for reading and writing PDF, powered by qpdf |
 | [OpenColorIO][]                   | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | A color management framework for visual effects and animation. |
 | [Line Profiler][]                 | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Line-by-line profiling for Python |
 | [PyTables][]                      | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | A Python package to manage extremely large amounts of data |
 | [OpenTimelineIO][]                | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Open Source API and interchange format for editorial timeline information. |
-| [pikepdf][]                       | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | A Python library for reading and writing PDF, powered by qpdf |
 | [ruptures][]                      | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Extensive Cython + NumPy [pyproject.toml](https://github.com/deepcharles/ruptures/blob/master/pyproject.toml) example. |
 | [aioquic][]                       | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | QUIC and HTTP/3 implementation in Python |
 | [DeepForest][]                    | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | An Efficient, Scalable and Optimized Python Framework for Deep Forest (2021.2.1) |
@@ -55,73 +65,84 @@ title: Working examples
 | [Parselmouth][]                   | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | A Python interface to the Praat software package, using pybind11, C++17 and CMake, with the core Praat static library built only once and shared between wheels. |
 | [AutoPy][]                        | ![travisci icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Includes a Windows Travis build. |
 | [H3-py][]                         | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Python bindings for H3, a hierarchical hexagonal geospatial indexing system |
-| [markupsafe][]                    | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Safely add untrusted strings to HTML/XML markup. |
 | [Rtree][]                         | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Rtree: spatial index for Python GIS ¶ |
+| [markupsafe][]                    | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Safely add untrusted strings to HTML/XML markup. |
 | [python-rapidjson][]              | ![travisci icon][] ![gitlab icon][] ![appveyor icon][] | ![windows icon][] ![linux icon][] | Python wrapper around rapidjson |
 | [python-snappy][]                 | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Python bindings for the snappy google library |
 | [pybind11 cmake_example][]        | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Example pybind11 module built with a CMake-based build system |
 | [KDEpy][]                         | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Kernel Density Estimation in Python |
 | [tgcalls][]                       | ![github icon][] | ![apple icon][] ![windows icon][] | Python `pybind11` binding to Telegram's WebRTC library with third party dependencies like `OpenSSL`, `MozJPEG`, `FFmpeg`, etc. |
-| [pybind11 python_example][]       | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Example pybind11 module built with a Python-based build system |
 | [dd-trace-py][]                   | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Uses custom alternate arch emulation on GitHub |
-| [cyvcf2][]                        | ![github icon][] | ![apple icon][] ![linux icon][] | cython + htslib == fast VCF and BCF processing |
+| [pybind11 python_example][]       | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Example pybind11 module built with a Python-based build system |
 | [sourmash][]                      | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Quickly search, compare, and analyze genomic and metagenomic data sets. |
 | [time-machine][]                  | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Time mocking library using only the CPython C API. |
-| [abess][]                         | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | A fast best-subset selection library. It uses cibuildwheel to build a large project with C++ extensions. |
 | [CTranslate2][]                   | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Includes libraries from the [Intel oneAPI toolkit](https://www.intel.com/content/www/us/en/developer/tools/oneapi/base-toolkit.html) and CUDA kernels compiled for multiple GPU architectures. |
+| [cyvcf2][]                        | ![github icon][] | ![apple icon][] ![linux icon][] | cython + htslib == fast VCF and BCF processing |
 | [matrixprofile][]                 | ![travisci icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | A Python 3 library making time series data mining tasks, utilizing matrix profile algorithms, accessible to everyone. |
+| [abess][]                         | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | A fast best-subset selection library. It uses cibuildwheel to build a large project with C++ extensions. |
 | [jq.py][]                         | ![travisci icon][] | ![apple icon][] ![linux icon][] | Python bindings for jq |
 | [iminuit][]                       | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Jupyter-friendly Python interface for C++ MINUIT2 |
 | [Tokenizer][]                     | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Fast and customizable text tokenization library with BPE and SentencePiece support |
 | [PyGLM][]                         | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Fast OpenGL Mathematics (GLM) for Python |
-| [bx-python][]                     | ![travisci icon][] | ![apple icon][] ![linux icon][] | A library that includes Cython extensions. |
 | [boost-histogram][]               | ![github icon][] ![travisci icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Supports full range of wheels, including PyPy and alternate archs. |
-| [iDynTree][]                      | ![github icon][] | ![linux icon][] | Uses manylinux_2_24 |
+| [bx-python][]                     | ![travisci icon][] | ![apple icon][] ![linux icon][] | A library that includes Cython extensions. |
 | [TgCrypto][]                      | ![travisci icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Includes a Windows Travis build. |
+| [iDynTree][]                      | ![github icon][] | ![linux icon][] | Uses manylinux_2_24 |
+| [Python-WebRTC][]                 | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | a Python extension that provides bindings to WebRTC M92 |
 | [pybase64][]                      | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Fast Base64 encoding/decoding in Python |
 | [Arbor][]                         | ![github icon][] | ![apple icon][] ![linux icon][] | Arbor is a multi-compartment neuron simulation library; compatible with next-generation accelerators; best-practices applied to research software; focused on community-driven development. Includes a [small script](https://github.com/arbor-sim/arbor/blob/master/scripts/patchwheel.py) patching `rpath` in bundled libraries.  |
-| [etebase-py][]                    | ![travisci icon][] | ![linux icon][] | Python bindings to a Rust library using `setuptools-rust`, and `sccache` for improved speed. |
 | [fathon][]                        | ![travisci icon][] | ![apple icon][] ![linux icon][] | python package for DFA (Detrended Fluctuation Analysis) and related algorithms |
-| [Imagecodecs (fork)][]            | ![azurepipelines icon][] | ![apple icon][] ![linux icon][] | Over 20 external dependencies in compiled libraries, custom docker image, `libomp`, `openblas` and `install_name_tool` for macOS. |
+| [etebase-py][]                    | ![travisci icon][] | ![linux icon][] | Python bindings to a Rust library using `setuptools-rust`, and `sccache` for improved speed. |
 | [polaroid][]                      | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Full range of wheels for setuptools rust, with auto release and PyPI deploy. |
+| [cf-units][]                      | ![github icon][] | ![apple icon][] ![linux icon][] | Units of measure as required by the Climate and Forecast (CF) Metadata Conventions |
+| [Imagecodecs (fork)][]            | ![azurepipelines icon][] | ![apple icon][] ![linux icon][] | Over 20 external dependencies in compiled libraries, custom docker image, `libomp`, `openblas` and `install_name_tool` for macOS. |
+| [clang-format][]                  | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Scikit-build wrapper around LLVM's CMake, all platforms, generic wheels. |
+| [pillow-heif][]                   | ![github icon][] | ![apple icon][] ![linux icon][] | Python CFFI binding to libheif library with third party dependencies like `libde265`, `x265`, `libaom` with test & publishing on PyPi. |
+| [power-grid-model][]              | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Python/C++ library for distribution power system analysis |
 | [numpythia][]                     | ![github icon][] | ![apple icon][] ![linux icon][] | The interface between PYTHIA and NumPy |
 | [pyjet][]                         | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | The interface between FastJet and NumPy |
-| [clang-format][]                  | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Scikit-build wrapper around LLVM's CMake, all platforms, generic wheels. |
-| [ninja][]                         | ![github icon][] ![travisci icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Multitagged binary builds for all supported platforms, using cibw 2 config configuration. |
 | [pybind11 scikit_build_example][] | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | An example combining scikit-build and pybind11 |
+| [ninja][]                         | ![github icon][] ![travisci icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Multitagged binary builds for all supported platforms, using cibw 2 config configuration. |
 | [GSD][]                           | ![github icon][] | ![apple icon][] ![linux icon][] ![windows icon][] | Cython and NumPy project with 64-bit wheels. |
-| [pillow-heif][]                   | ![github icon][] | ![apple icon][] ![linux icon][] | Python CFFI binding to libheif library with third party dependencies like `libde265`, `x265`, `libaom` with test & publishing on PyPi. |
 | [pyinstrument_cext][]             | ![travisci icon][] ![appveyor icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | A simple C extension, without external dependencies |
 | [xmlstarlet][]                    | ![github icon][] | ![windows icon][] ![apple icon][] ![linux icon][] | Python 3.6+ CFFI bindings with true MSVC build. |
 | [CorrectionLib][]                 | ![github icon][] | ![apple icon][] ![linux icon][] | Structured JSON powered correction library for HEP, designed for the CMS experiment at CERN. |
 | [SiPM][]                          | ![github icon][] | ![apple icon][] ![linux icon][] | High performance library for SiPM detectors simulation using C++17, OpenMP and AVX2 intrinsics. |
 
 [scikit-learn]: https://github.com/scikit-learn/scikit-learn
+[NumPy]: https://github.com/numpy/numpy
 [Tornado]: https://github.com/tornadoweb/tornado
 [pytorch-fairseq]: https://github.com/pytorch/fairseq
 [Matplotlib]: https://github.com/matplotlib/matplotlib
+[NCNN]: https://github.com/Tencent/ncnn
+[Kivy]: https://github.com/kivy/kivy
+[Prophet]: https://github.com/facebook/prophet
 [MyPy]: https://github.com/mypyc/mypy_mypyc-wheels
 [pydantic]: https://github.com/samuelcolvin/pydantic
+[MemRay]: https://github.com/bloomberg/memray
 [uvloop]: https://github.com/MagicStack/uvloop
 [psutil]: https://github.com/giampaolo/psutil
 [vaex]: https://github.com/vaexio/vaex
 [Google Benchmark]: https://github.com/google/benchmark
 [Apache Beam]: https://github.com/apache/beam
 [asyncpg]: https://github.com/MagicStack/asyncpg
-[scikit-image]: https://github.com/scikit-image/scikit-image
-[cmake]: https://github.com/scikit-build/cmake-python-distributions
 [duckdb]: https://github.com/duckdb/duckdb
+[scikit-image]: https://github.com/scikit-image/scikit-image
+[PyGame]: https://github.com/pygame/pygame
+[cmake]: https://github.com/scikit-build/cmake-python-distributions
 [twisted-iocpsupport]: https://github.com/twisted/twisted-iocpsupport
 [websockets]: https://github.com/aaugustin/websockets
 [cvxpy]: https://github.com/cvxpy/cvxpy
 [PyOxidizer]: https://github.com/indygreg/PyOxidizer
 [Triton]: https://github.com/openai/triton
+[UltraJSON]: https://github.com/ultrajson/ultrajson
 [River]: https://github.com/online-ml/river
 [OpenSpiel]: https://github.com/deepmind/open_spiel
 [pyzmq]: https://github.com/zeromq/pyzmq
 [aiortc]: https://github.com/aiortc/aiortc
 [vispy]: https://github.com/vispy/vispy
 [Confluent client for Kafka]: https://github.com/confluentinc/confluent-kafka-python
+[Implicit]: https://github.com/benfred/implicit
 [tinyobjloader]: https://github.com/tinyobjloader/tinyobjloader
 [Dependency Injector]: https://github.com/ets-labs/python-dependency-injector
 [coverage.py]: https://github.com/nedbat/coveragepy
@@ -129,12 +150,14 @@ title: Working examples
 [PyYAML]: https://github.com/yaml/pyyaml
 [numexpr]: https://github.com/pydata/numexpr
 [h5py]: https://github.com/h5py/h5py
+[Wrapt]: https://github.com/GrahamDumpleton/wrapt
 [PyAV]: https://github.com/PyAV-Org/PyAV
+[SimpleJSON]: https://github.com/simplejson/simplejson
+[pikepdf]: https://github.com/pikepdf/pikepdf
 [OpenColorIO]: https://github.com/AcademySoftwareFoundation/OpenColorIO
 [Line Profiler]: https://github.com/pyutils/line_profiler
 [PyTables]: https://github.com/PyTables/PyTables
 [OpenTimelineIO]: https://github.com/PixarAnimationStudios/OpenTimelineIO
-[pikepdf]: https://github.com/pikepdf/pikepdf
 [ruptures]: https://github.com/deepcharles/ruptures
 [aioquic]: https://github.com/aiortc/aioquic
 [DeepForest]: https://github.com/LAMDA-NJU/Deep-Forest
@@ -143,42 +166,45 @@ title: Working examples
 [Parselmouth]: https://github.com/YannickJadoul/Parselmouth
 [AutoPy]: https://github.com/autopilot-rs/autopy
 [H3-py]: https://github.com/uber/h3-py
-[markupsafe]: https://github.com/pallets/markupsafe
 [Rtree]: https://github.com/Toblerity/rtree
+[markupsafe]: https://github.com/pallets/markupsafe
 [python-rapidjson]: https://github.com/python-rapidjson/python-rapidjson
 [python-snappy]: https://github.com/andrix/python-snappy
 [pybind11 cmake_example]: https://github.com/pybind/cmake_example
 [KDEpy]: https://github.com/tommyod/KDEpy
 [tgcalls]: https://github.com/MarshalX/tgcalls
-[pybind11 python_example]: https://github.com/pybind/python_example
 [dd-trace-py]: https://github.com/DataDog/dd-trace-py
-[cyvcf2]: https://github.com/brentp/cyvcf2
+[pybind11 python_example]: https://github.com/pybind/python_example
 [sourmash]: https://github.com/dib-lab/sourmash
 [time-machine]: https://github.com/adamchainz/time-machine
-[abess]: https://github.com/abess-team/abess
 [CTranslate2]: https://github.com/OpenNMT/CTranslate2
+[cyvcf2]: https://github.com/brentp/cyvcf2
 [matrixprofile]: https://github.com/matrix-profile-foundation/matrixprofile
+[abess]: https://github.com/abess-team/abess
 [jq.py]: https://github.com/mwilliamson/jq.py
 [iminuit]: https://github.com/scikit-hep/iminuit
 [Tokenizer]: https://github.com/OpenNMT/Tokenizer
 [PyGLM]: https://github.com/Zuzu-Typ/PyGLM
-[bx-python]: https://github.com/bxlab/bx-python
 [boost-histogram]: https://github.com/scikit-hep/boost-histogram
-[iDynTree]: https://github.com/robotology/idyntree
+[bx-python]: https://github.com/bxlab/bx-python
 [TgCrypto]: https://github.com/pyrogram/tgcrypto
+[iDynTree]: https://github.com/robotology/idyntree
+[Python-WebRTC]: https://github.com/MarshalX/python-webrtc
 [pybase64]: https://github.com/mayeut/pybase64
 [Arbor]: https://github.com/arbor-sim/arbor
-[etebase-py]: https://github.com/etesync/etebase-py
 [fathon]: https://github.com/stfbnc/fathon
-[Imagecodecs (fork)]: https://github.com/czaki/imagecodecs_build
+[etebase-py]: https://github.com/etesync/etebase-py
 [polaroid]: https://github.com/daggy1234/polaroid
+[cf-units]: https://github.com/SciTools/cf-units
+[Imagecodecs (fork)]: https://github.com/czaki/imagecodecs_build
+[clang-format]: https://github.com/ssciwr/clang-format-wheel
+[pillow-heif]: https://github.com/bigcat88/pillow_heif
+[power-grid-model]: https://github.com/alliander-opensource/power-grid-model
 [numpythia]: https://github.com/scikit-hep/numpythia
 [pyjet]: https://github.com/scikit-hep/pyjet
-[clang-format]: https://github.com/ssciwr/clang-format-wheel
-[ninja]: https://github.com/scikit-build/ninja-python-distributions
 [pybind11 scikit_build_example]: https://github.com/pybind/scikit_build_example
+[ninja]: https://github.com/scikit-build/ninja-python-distributions
 [GSD]: https://github.com/glotzerlab/gsd
-[pillow-heif]: https://github.com/bigcat88/pillow_heif
 [pyinstrument_cext]: https://github.com/joerick/pyinstrument_cext
 [xmlstarlet]: https://github.com/dimitern/xmlstarlet
 [CorrectionLib]: https://github.com/cms-nanoAOD/correctionlib
@@ -194,93 +220,106 @@ title: Working examples
 [apple icon]: data/readme_icons/apple.svg
 [linux icon]: data/readme_icons/linux.svg
 
-<!-- scikit-learn: 49555, last pushed 0 days ago -->
-<!-- Tornado: 20477, last pushed 1 days ago -->
-<!-- pytorch-fairseq: 16526, last pushed 2 days ago -->
-<!-- Matplotlib: 15257, last pushed 0 days ago -->
-<!-- MyPy: 12783, last pushed 0 days ago -->
-<!-- pydantic: 9538, last pushed 3 days ago -->
-<!-- uvloop: 8496, last pushed 85 days ago -->
-<!-- psutil: 8240, last pushed 3 days ago -->
-<!-- vaex: 6968, last pushed 0 days ago -->
-<!-- Google Benchmark: 6312, last pushed 0 days ago -->
-<!-- Apache Beam: 5409, last pushed 0 days ago -->
-<!-- asyncpg: 5394, last pushed 4 days ago -->
-<!-- scikit-image: 4842, last pushed 0 days ago -->
-<!-- cmake: 4616, last pushed 0 days ago -->
-<!-- duckdb: 4607, last pushed 0 days ago -->
-<!-- twisted-iocpsupport: 4550, last pushed 0 days ago -->
-<!-- websockets: 3862, last pushed 0 days ago -->
-<!-- cvxpy: 3840, last pushed 5 days ago -->
-<!-- PyOxidizer: 3571, last pushed 0 days ago -->
-<!-- Triton: 3552, last pushed 0 days ago -->
-<!-- River: 3261, last pushed 0 days ago -->
-<!-- OpenSpiel: 3129, last pushed 3 days ago -->
-<!-- pyzmq: 3057, last pushed 3 days ago -->
-<!-- aiortc: 2857, last pushed 2 days ago -->
-<!-- vispy: 2836, last pushed 0 days ago -->
-<!-- Confluent client for Kafka: 2699, last pushed 0 days ago -->
-<!-- tinyobjloader: 2460, last pushed 95 days ago -->
-<!-- Dependency Injector: 1986, last pushed 2 days ago -->
-<!-- coverage.py: 1972, last pushed 3 days ago -->
-<!-- PyCryptodome: 1961, last pushed 2 days ago -->
-<!-- PyYAML: 1785, last pushed 9 days ago -->
-<!-- numexpr: 1741, last pushed 2 days ago -->
-<!-- h5py: 1703, last pushed 0 days ago -->
-<!-- PyAV: 1503, last pushed 0 days ago -->
-<!-- OpenColorIO: 1275, last pushed 0 days ago -->
-<!-- Line Profiler: 1140, last pushed 0 days ago -->
-<!-- PyTables: 1113, last pushed 6 days ago -->
-<!-- OpenTimelineIO: 1023, last pushed 0 days ago -->
-<!-- pikepdf: 982, last pushed 2 days ago -->
-<!-- ruptures: 930, last pushed 3 days ago -->
-<!-- aioquic: 893, last pushed 2 days ago -->
-<!-- DeepForest: 737, last pushed 252 days ago -->
-<!-- google neuroglancer: 725, last pushed 3 days ago -->
-<!-- Psycopg 3: 638, last pushed 0 days ago -->
-<!-- Parselmouth: 634, last pushed 0 days ago -->
-<!-- AutoPy: 629, last pushed 97 days ago -->
-<!-- H3-py: 498, last pushed 2 days ago -->
-<!-- markupsafe: 459, last pushed 17 days ago -->
-<!-- Rtree: 456, last pushed 1 days ago -->
-<!-- python-rapidjson: 447, last pushed 23 days ago -->
-<!-- python-snappy: 426, last pushed 15 days ago -->
-<!-- pybind11 cmake_example: 380, last pushed 2 days ago -->
-<!-- KDEpy: 356, last pushed 50 days ago -->
-<!-- tgcalls: 346, last pushed 83 days ago -->
-<!-- pybind11 python_example: 312, last pushed 81 days ago -->
-<!-- dd-trace-py: 300, last pushed 0 days ago -->
-<!-- cyvcf2: 294, last pushed 17 days ago -->
-<!-- sourmash: 281, last pushed 0 days ago -->
-<!-- time-machine: 274, last pushed 3 days ago -->
-<!-- abess: 258, last pushed 6 days ago -->
-<!-- CTranslate2: 254, last pushed 0 days ago -->
-<!-- matrixprofile: 250, last pushed 279 days ago -->
-<!-- jq.py: 206, last pushed 54 days ago -->
-<!-- iminuit: 197, last pushed 2 days ago -->
-<!-- Tokenizer: 169, last pushed 25 days ago -->
-<!-- PyGLM: 133, last pushed 3 days ago -->
-<!-- bx-python: 113, last pushed 86 days ago -->
-<!-- boost-histogram: 107, last pushed 1 days ago -->
-<!-- iDynTree: 98, last pushed 4 days ago -->
-<!-- TgCrypto: 94, last pushed 28 days ago -->
-<!-- pybase64: 82, last pushed 2 days ago -->
-<!-- Arbor: 70, last pushed 0 days ago -->
-<!-- etebase-py: 56, last pushed 95 days ago -->
-<!-- fathon: 43, last pushed 134 days ago -->
-<!-- Imagecodecs (fork): 41, last pushed 32 days ago -->
-<!-- polaroid: 35, last pushed 110 days ago -->
-<!-- numpythia: 33, last pushed 34 days ago -->
-<!-- pyjet: 32, last pushed 34 days ago -->
-<!-- clang-format: 32, last pushed 38 days ago -->
-<!-- ninja: 23, last pushed 10 days ago -->
-<!-- pybind11 scikit_build_example: 21, last pushed 51 days ago -->
-<!-- GSD: 19, last pushed 87 days ago -->
-<!-- pillow-heif: 16, last pushed 0 days ago -->
-<!-- pyinstrument_cext: 10, last pushed 175 days ago -->
-<!-- xmlstarlet: 8, last pushed 11 days ago -->
-<!-- CorrectionLib: 8, last pushed 0 days ago -->
-<!-- SiPM: 5, last pushed 1 days ago -->
+<!-- scikit-learn: 50754, last pushed 0 days ago -->
+<!-- NumPy: 20975, last pushed 0 days ago -->
+<!-- Tornado: 20638, last pushed 0 days ago -->
+<!-- pytorch-fairseq: 18489, last pushed 2 days ago -->
+<!-- Matplotlib: 15822, last pushed 0 days ago -->
+<!-- NCNN: 14975, last pushed 0 days ago -->
+<!-- Kivy: 14789, last pushed 0 days ago -->
+<!-- Prophet: 14684, last pushed 10 days ago -->
+<!-- MyPy: 13444, last pushed 0 days ago -->
+<!-- pydantic: 10450, last pushed 0 days ago -->
+<!-- MemRay: 8836, last pushed 2 days ago -->
+<!-- uvloop: 8725, last pushed 0 days ago -->
+<!-- psutil: 8531, last pushed 3 days ago -->
+<!-- vaex: 7175, last pushed 0 days ago -->
+<!-- Google Benchmark: 6659, last pushed 0 days ago -->
+<!-- Apache Beam: 5702, last pushed 0 days ago -->
+<!-- asyncpg: 5558, last pushed 10 days ago -->
+<!-- duckdb: 5546, last pushed 0 days ago -->
+<!-- scikit-image: 4978, last pushed 0 days ago -->
+<!-- PyGame: 4976, last pushed 0 days ago -->
+<!-- cmake: 4910, last pushed 0 days ago -->
+<!-- twisted-iocpsupport: 4666, last pushed 3 days ago -->
+<!-- websockets: 4022, last pushed 1 days ago -->
+<!-- cvxpy: 4009, last pushed 0 days ago -->
+<!-- PyOxidizer: 3919, last pushed 1 days ago -->
+<!-- Triton: 3786, last pushed 0 days ago -->
+<!-- UltraJSON: 3755, last pushed 7 days ago -->
+<!-- River: 3488, last pushed 2 days ago -->
+<!-- OpenSpiel: 3248, last pushed 0 days ago -->
+<!-- pyzmq: 3130, last pushed 4 days ago -->
+<!-- aiortc: 2993, last pushed 23 days ago -->
+<!-- vispy: 2904, last pushed 5 days ago -->
+<!-- Confluent client for Kafka: 2848, last pushed 2 days ago -->
+<!-- Implicit: 2847, last pushed 1 days ago -->
+<!-- tinyobjloader: 2594, last pushed 13 days ago -->
+<!-- Dependency Injector: 2244, last pushed 7 days ago -->
+<!-- coverage.py: 2106, last pushed 1 days ago -->
+<!-- PyCryptodome: 2054, last pushed 7 days ago -->
+<!-- PyYAML: 1883, last pushed 1 days ago -->
+<!-- numexpr: 1775, last pushed 0 days ago -->
+<!-- h5py: 1757, last pushed 12 days ago -->
+<!-- Wrapt: 1705, last pushed 77 days ago -->
+<!-- PyAV: 1605, last pushed 0 days ago -->
+<!-- SimpleJSON: 1500, last pushed 17 days ago -->
+<!-- pikepdf: 1385, last pushed 1 days ago -->
+<!-- OpenColorIO: 1335, last pushed 6 days ago -->
+<!-- Line Profiler: 1284, last pushed 5 days ago -->
+<!-- PyTables: 1137, last pushed 90 days ago -->
+<!-- OpenTimelineIO: 1071, last pushed 0 days ago -->
+<!-- ruptures: 988, last pushed 11 days ago -->
+<!-- aioquic: 986, last pushed 0 days ago -->
+<!-- DeepForest: 769, last pushed 65 days ago -->
+<!-- google neuroglancer: 740, last pushed 4 days ago -->
+<!-- Psycopg 3: 733, last pushed 0 days ago -->
+<!-- Parselmouth: 671, last pushed 7 days ago -->
+<!-- AutoPy: 662, last pushed 205 days ago -->
+<!-- H3-py: 548, last pushed 15 days ago -->
+<!-- Rtree: 489, last pushed 90 days ago -->
+<!-- markupsafe: 480, last pushed 13 days ago -->
+<!-- python-rapidjson: 456, last pushed 11 days ago -->
+<!-- python-snappy: 440, last pushed 123 days ago -->
+<!-- pybind11 cmake_example: 420, last pushed 12 days ago -->
+<!-- KDEpy: 387, last pushed 158 days ago -->
+<!-- tgcalls: 376, last pushed 16 days ago -->
+<!-- dd-trace-py: 342, last pushed 0 days ago -->
+<!-- pybind11 python_example: 337, last pushed 12 days ago -->
+<!-- sourmash: 313, last pushed 0 days ago -->
+<!-- time-machine: 312, last pushed 6 days ago -->
+<!-- CTranslate2: 308, last pushed 0 days ago -->
+<!-- cyvcf2: 302, last pushed 58 days ago -->
+<!-- matrixprofile: 272, last pushed 14 days ago -->
+<!-- abess: 271, last pushed 3 days ago -->
+<!-- jq.py: 220, last pushed 162 days ago -->
+<!-- iminuit: 206, last pushed 1 days ago -->
+<!-- Tokenizer: 187, last pushed 133 days ago -->
+<!-- PyGLM: 147, last pushed 111 days ago -->
+<!-- boost-histogram: 116, last pushed 1 days ago -->
+<!-- bx-python: 114, last pushed 194 days ago -->
+<!-- TgCrypto: 108, last pushed 136 days ago -->
+<!-- iDynTree: 106, last pushed 5 days ago -->
+<!-- Python-WebRTC: 92, last pushed 129 days ago -->
+<!-- pybase64: 85, last pushed 4 days ago -->
+<!-- Arbor: 76, last pushed 0 days ago -->
+<!-- fathon: 63, last pushed 45 days ago -->
+<!-- etebase-py: 58, last pushed 11 days ago -->
+<!-- polaroid: 49, last pushed 67 days ago -->
+<!-- cf-units: 49, last pushed 0 days ago -->
+<!-- Imagecodecs (fork): 46, last pushed 33 days ago -->
+<!-- clang-format: 41, last pushed 13 days ago -->
+<!-- pillow-heif: 37, last pushed 1 days ago -->
+<!-- power-grid-model: 37, last pushed 0 days ago -->
+<!-- numpythia: 34, last pushed 12 days ago -->
+<!-- pyjet: 33, last pushed 17 days ago -->
+<!-- pybind11 scikit_build_example: 29, last pushed 12 days ago -->
+<!-- ninja: 24, last pushed 1 days ago -->
+<!-- GSD: 19, last pushed 13 days ago -->
+<!-- pyinstrument_cext: 10, last pushed 283 days ago -->
+<!-- xmlstarlet: 9, last pushed 7 days ago -->
+<!-- CorrectionLib: 9, last pushed 12 days ago -->
+<!-- SiPM: 6, last pushed 47 days ago -->
 
 <!-- END bin/projects.py -->
 

examples/appveyor-minimal.yml

@@ -12,7 +12,7 @@ stack: python 3.7
 init:
 - cmd: set PATH=C:\Python37;C:\Python37\Scripts;%PATH%
 
-install: python -m pip install cibuildwheel==2.4.0
+install: python -m pip install cibuildwheel==2.8.1
 
 build_script: python -m cibuildwheel --output-dir wheelhouse
 

examples/azure-pipelines-minimal.yml

@@ -6,7 +6,7 @@ jobs:
     - bash: |
         set -o errexit
         python3 -m pip install --upgrade pip
-        pip3 install cibuildwheel==2.4.0
+        pip3 install cibuildwheel==2.8.1
       displayName: Install dependencies
     - bash: cibuildwheel --output-dir wheelhouse .
       displayName: Build wheels
@@ -14,13 +14,13 @@ jobs:
       inputs: {pathtoPublish: 'wheelhouse'}
 
 - job: macos
-  pool: {vmImage: 'macOS-10.15'}
+  pool: {vmImage: 'macOS-11'}
   steps:
     - task: UsePythonVersion@0
     - bash: |
         set -o errexit
         python3 -m pip install --upgrade pip
-        python3 -m pip install cibuildwheel==2.4.0
+        python3 -m pip install cibuildwheel==2.8.1
       displayName: Install dependencies
     - bash: cibuildwheel --output-dir wheelhouse .
       displayName: Build wheels
@@ -34,7 +34,7 @@ jobs:
     - bash: |
         set -o errexit
         python -m pip install --upgrade pip
-        pip install cibuildwheel==2.4.0
+        pip install cibuildwheel==2.8.1
       displayName: Install dependencies
     - bash: cibuildwheel --output-dir wheelhouse .
       displayName: Build wheels

examples/circleci-minimal.yml

@@ -11,7 +11,7 @@ jobs:
       - run:
           name: Build the Linux wheels.
           command: |
-            pip3 install --user cibuildwheel==2.4.0
+            pip3 install --user cibuildwheel==2.8.1
             cibuildwheel --output-dir wheelhouse
       - store_artifacts:
           path: wheelhouse/
@@ -25,7 +25,7 @@ jobs:
       - run:
           name: Build the OS X wheels.
           command: |
-            pip3 install cibuildwheel==2.4.0
+            pip3 install cibuildwheel==2.8.1
             cibuildwheel --output-dir wheelhouse
       - store_artifacts:
           path: wheelhouse/

examples/github-apple-silicon.yml

@@ -4,16 +4,16 @@ on: [push, pull_request]
 
 jobs:
   build_wheels_macos:
-    name: Build wheels on macos-10.15
-    runs-on: macos-10.15
+    name: Build wheels on macos-11
+    runs-on: macos-11
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.4.0
+        uses: pypa/cibuildwheel@v2.8.1
         env:
           CIBW_ARCHS_MACOS: x86_64 universal2
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           path: ./wheelhouse/*.whl

examples/github-deploy.yml

@@ -16,15 +16,15 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, windows-2019, macos-10.15]
+        os: [ubuntu-20.04, windows-2019, macos-11]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.4.0
+        uses: pypa/cibuildwheel@v2.8.1
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           path: ./wheelhouse/*.whl
 
@@ -32,12 +32,12 @@ jobs:
     name: Build source distribution
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Build sdist
         run: pipx run build --sdist
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           path: dist/*.tar.gz
 
@@ -49,12 +49,14 @@ jobs:
     # alternatively, to publish when a GitHub Release is created, use the following rule:
     # if: github.event_name == 'release' && github.event.action == 'published'
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v3
         with:
+          # unpacks default artifact into dist/
+          # if `name: artifact` is omitted, the action will create extra parent dir
           name: artifact
           path: dist
 
-      - uses: pypa/gh-action-pypi-publish@v1.4.2
+      - uses: pypa/gh-action-pypi-publish@v1.5.0
         with:
           user: __token__
           password: ${{ secrets.pypi_password }}

examples/github-minimal.yml

@@ -8,17 +8,21 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, windows-2019, macos-10.15]
+        os: [ubuntu-20.04, windows-2019, macos-11]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.4.0
-        # to supply options, put them in 'env', like:
+        uses: pypa/cibuildwheel@v2.8.1
         # env:
         #   CIBW_SOME_OPTION: value
+        #    ...
+        # with:
+        #   package-dir: .
+        #   output-dir: wheelhouse
+        #   config-file: "{package}/pyproject.toml"
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           path: ./wheelhouse/*.whl

examples/github-with-qemu.yml

@@ -8,12 +8,12 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, windows-2019, macos-10.15]
+        os: [ubuntu-20.04, windows-2019, macos-11]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v3
         name: Install Python
         with:
           python-version: '3.7'
@@ -25,12 +25,12 @@ jobs:
           platforms: all
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.4.0
+        uses: pypa/cibuildwheel@v2.8.1
         env:
           # configure cibuildwheel to build native archs ('auto'), and some
           # emulated ones
           CIBW_ARCHS_LINUX: auto aarch64 ppc64le s390x
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           path: ./wheelhouse/*.whl

examples/gitlab-minimal.yml

@@ -12,7 +12,7 @@ linux:
     DOCKER_TLS_CERTDIR: ""
   script:
     - curl -sSL https://get.docker.com/ | sh
-    - python -m pip install cibuildwheel==2.4.0
+    - python -m pip install cibuildwheel==2.8.1
     - cibuildwheel --output-dir wheelhouse
   artifacts:
     paths:

examples/travis-ci-deploy.yml

@@ -19,7 +19,7 @@ jobs:
         - ln -s /c/Python38/python.exe /c/Python38/python3.exe
 
 install:
-  - python3 -m pip install cibuildwheel==2.4.0
+  - python3 -m pip install cibuildwheel==2.8.1
 
 script:
   # build the wheels, put them into './dist'

examples/travis-ci-minimal.yml

@@ -25,7 +25,7 @@ jobs:
         - ln -s /c/Python38/python.exe /c/Python38/python3.exe
 
 install:
-  - python3 -m pip install cibuildwheel==2.4.0
+  - python3 -m pip install cibuildwheel==2.8.1
 
 script:
   # build the wheels, put them into './wheelhouse'

examples/travis-ci-test-and-deploy.yml

@@ -55,7 +55,7 @@ jobs:
     - stage: deploy
       name: Build and deploy Linux wheels
       services: docker
-      install: python3 -m pip install cibuildwheel==2.4.0 twine
+      install: python3 -m pip install cibuildwheel==2.8.1 twine
       script: python3 -m cibuildwheel --output-dir wheelhouse
       after_success: python3 -m twine upload --skip-existing wheelhouse/*.whl
     # Deploy on windows
@@ -63,7 +63,7 @@ jobs:
       name: Build and deploy Windows wheels
       os: windows
       language: shell
-      install: python3 -m pip install cibuildwheel==2.4.0 twine
+      install: python3 -m pip install cibuildwheel==2.8.1 twine
       script: python3 -m cibuildwheel --output-dir wheelhouse
       after_success: python3 -m twine upload --skip-existing wheelhouse/*.whl
 

noxfile.py

@@ -7,7 +7,7 @@ import nox
 
 nox.options.sessions = ["lint", "pylint", "check_manifest", "tests"]
 
-PYTHON_ALL_VERSIONS = ["3.6", "3.7", "3.8", "3.9", "3.10"]
+PYTHON_ALL_VERSIONS = ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11"]
 
 DIR = Path(__file__).parent.resolve()
 
@@ -92,12 +92,13 @@ def update_proj(session: nox.Session) -> None:
     )
 
 
-@nox.session
+@nox.session(python="3.9")
 def docs(session: nox.Session) -> None:
     """
     Build the docs.
     """
     session.install("-e", ".[docs]")
+    session.run("pip", "list")
 
     if session.posargs:
         if "serve" in session.posargs:

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = cibuildwheel
-version = 2.4.0
+version = 2.8.1
 description = Build Python wheels on CI with minimal configuration.
 long_description = file: README.md
 long_description_content_type = text/markdown
@@ -35,10 +35,10 @@ install_requires =
     bracex
     certifi
     filelock
-    packaging
+    packaging>=20.9
     platformdirs
-    tomli
     dataclasses;python_version < '3.7'
+    tomli;python_version < '3.11'
     typing-extensions>=3.10.0.0;python_version < '3.8'
 python_requires = >=3.6
 include_package_data = True
@@ -56,8 +56,8 @@ console_scripts =
 cibuildwheel = resources/*
 
 [flake8]
-ignore = E501,W503,E741,E226,B950,E203
-select = C,E,F,W,B,B9
+extend-ignore = E203,E501,B950,B023
+extend-select = B9
 application-import-names = cibuildwheel
 exclude =
     cibuildwheel/resources/,

setup.py

@@ -3,16 +3,19 @@ from setuptools import setup
 extras = {
     "docs": [
         "mkdocs-include-markdown-plugin==2.8.0",
-        "mkdocs==1.0.4",
+        "mkdocs==1.0.4",  # Doesn't support Python 3.10+
         "jinja2==3.0.3",
         "pymdown-extensions",
         "mkdocs-macros-plugin",
+        "markdown<3.4",  # Breaks mkdocs 1.0.4
     ],
     "test": [
         "jinja2",
         "pytest>=6",
         "pytest-timeout",
         "pytest-xdist",
+        "build",
+        "tomli_w",
     ],
     "bin": [
         "click",

test/conftest.py

@@ -7,20 +7,7 @@ def pytest_addoption(parser) -> None:
     parser.addoption(
         "--run-emulation", action="store_true", default=False, help="run emulation tests"
     )
-
-
-def pytest_configure(config):
-    config.addinivalue_line("markers", "emulation: mark test requiring qemu binfmt_misc to run")
-
-
-def pytest_collection_modifyitems(config, items) -> None:
-    if config.getoption("--run-emulation"):
-        # --run-emulation given in cli: do not skip emulation tests
-        return
-    skip_emulation = pytest.mark.skip(reason="need --run-emulation option to run")
-    for item in items:
-        if "emulation" in item.keywords:
-            item.add_marker(skip_emulation)
+    parser.addoption("--run-podman", action="store_true", default=False, help="run podman tests")
 
 
 @pytest.fixture(

test/test_0_basic.py

@@ -59,3 +59,19 @@ def test_build_identifiers(tmp_path):
     assert len(expected_wheels) == len(
         build_identifiers
     ), f"{expected_wheels} vs {build_identifiers}"
+
+
+def test_allow_empty(tmp_path):
+    project_dir = tmp_path / "project"
+    basic_project.generate(project_dir)
+
+    # Sanity check - --allow-empty should cause a no-op build to complete
+    # without error
+    actual_wheels = utils.cibuildwheel_run(
+        project_dir,
+        add_env={"CIBW_BUILD": "BUILD_NOTHING_AT_ALL"},
+        add_args=["--allow-empty"],
+    )
+
+    # check that nothing was built
+    assert len(actual_wheels) == 0

test/test_abi_variants.py

@@ -0,0 +1,179 @@
+import textwrap
+
+from . import test_projects, utils
+
+limited_api_project = test_projects.new_c_project(
+    setup_py_add=textwrap.dedent(
+        r"""
+        cmdclass = {}
+        extension_kwargs = {}
+        if sys.version_info[:2] >= (3, 8):
+            from wheel.bdist_wheel import bdist_wheel as _bdist_wheel
+
+            class bdist_wheel_abi3(_bdist_wheel):
+                def finalize_options(self):
+                    _bdist_wheel.finalize_options(self)
+                    self.root_is_pure = False
+
+                def get_tag(self):
+                    python, abi, plat = _bdist_wheel.get_tag(self)
+                    return python, "abi3", plat
+
+            cmdclass["bdist_wheel"] = bdist_wheel_abi3
+            extension_kwargs["define_macros"] = [("Py_LIMITED_API", "0x03080000")]
+            extension_kwargs["py_limited_api"] = True
+    """
+    ),
+    setup_py_extension_args_add="**extension_kwargs",
+    setup_py_setup_args_add="cmdclass=cmdclass",
+)
+
+
+def test_abi3(tmp_path):
+    project_dir = tmp_path / "project"
+    limited_api_project.generate(project_dir)
+
+    # build the wheels
+    actual_wheels = utils.cibuildwheel_run(
+        project_dir,
+        add_env={
+            "CIBW_SKIP": "pp* ",  # PyPy does not have a Py_LIMITED_API equivalent
+        },
+    )
+
+    # check that the expected wheels are produced
+    expected_wheels = [
+        w.replace("cp38-cp38", "cp38-abi3")
+        for w in utils.expected_wheels("spam", "0.1.0")
+        if "-pp" not in w and "-cp39" not in w and "-cp310" not in w and "-cp311" not in w
+    ]
+    assert set(actual_wheels) == set(expected_wheels)
+
+
+ctypes_project = test_projects.TestProject()
+ctypes_project.files["setup.py"] = textwrap.dedent(
+    """
+    from setuptools import setup, Extension
+
+    from distutils.command.build_ext import build_ext as _build_ext
+    class CTypesExtension(Extension): pass
+    class build_ext(_build_ext):
+        def build_extension(self, ext):
+            self._ctypes = isinstance(ext, CTypesExtension)
+            return super().build_extension(ext)
+
+        def get_export_symbols(self, ext):
+            if self._ctypes:
+                return ext.export_symbols
+            return super().get_export_symbols(ext)
+
+        def get_ext_filename(self, ext_name):
+            if self._ctypes:
+                return ext_name + '.so'
+            return super().get_ext_filename(ext_name)
+
+    from wheel.bdist_wheel import bdist_wheel as _bdist_wheel
+    class bdist_wheel_abi_none(_bdist_wheel):
+        def finalize_options(self):
+            _bdist_wheel.finalize_options(self)
+            self.root_is_pure = False
+
+        def get_tag(self):
+            python, abi, plat = _bdist_wheel.get_tag(self)
+            return "py3", "none", plat
+
+    setup(
+        name="ctypesexample",
+        version="1.0.0",
+        py_modules = ["ctypesexample.summing"],
+        ext_modules=[
+            CTypesExtension(
+                "ctypesexample.csumlib",
+                ["ctypesexample/csumlib.c"],
+            ),
+        ],
+        cmdclass={'build_ext': build_ext, 'bdist_wheel': bdist_wheel_abi_none},
+    )
+    """
+)
+ctypes_project.files["ctypesexample/csumlib.c"] = textwrap.dedent(
+    """
+    #ifdef _WIN32
+    #define LIBRARY_API __declspec(dllexport)
+    #else
+    #define LIBRARY_API
+    #endif
+
+    #include <stdlib.h>
+
+
+    LIBRARY_API double *add_vec3(double *a, double *b)
+    {
+        double *res = malloc(sizeof(double) * 3);
+
+        for (int i = 0; i < 3; ++i)
+        {
+            res[i] = a[i] + b[i];
+        }
+
+        return res;
+    }
+    """
+)
+ctypes_project.files["ctypesexample/summing.py"] = textwrap.dedent(
+    """
+    import ctypes
+    import pathlib
+
+    # path of the shared library
+    libfile = pathlib.Path(__file__).parent / "csumlib.so"
+    csumlib = ctypes.CDLL(str(libfile))
+
+    type_vec3 = ctypes.POINTER(ctypes.c_double * 3)
+
+    csumlib.add_vec3.restype = type_vec3
+    csumlib.add_vec3.argtypes = [type_vec3, type_vec3]
+    def add(a: list, b: list) -> list:
+        a_p = (ctypes.c_double * 3)(*a)
+        b_p = (ctypes.c_double * 3)(*b)
+        r_p = csumlib.add_vec3(a_p,b_p)
+
+        return [l for l in r_p.contents]
+    """
+)
+
+ctypes_project.files["test/add_test.py"] = textwrap.dedent(
+    """
+    import ctypesexample.summing
+
+    def test():
+        a = [1, 2, 3]
+        b = [4, 5, 6]
+        assert ctypesexample.summing.add(a, b) == [5, 7, 9]
+    """
+)
+
+
+def test_abi_none(tmp_path, capfd):
+    project_dir = tmp_path / "project"
+    ctypes_project.generate(project_dir)
+
+    # build the wheels
+    actual_wheels = utils.cibuildwheel_run(
+        project_dir,
+        add_env={
+            "CIBW_TEST_REQUIRES": "pytest",
+            "CIBW_TEST_COMMAND": "pytest {project}/test",
+            # limit the number of builds for test performance reasons
+            "CIBW_BUILD": "cp38-* cp310-* pp39-*",
+        },
+    )
+
+    # check that the expected wheels are produced
+    expected_wheels = utils.expected_wheels("ctypesexample", "1.0.0", python_abi_tags=["py3-none"])
+    assert set(actual_wheels) == set(expected_wheels)
+
+    # check that each wheel was built once, and reused
+    captured = capfd.readouterr()
+    assert "Building wheel..." in captured.out
+    assert "Found previously built wheel" in captured.out

test/test_emulation.py

@@ -17,8 +17,10 @@ def test_spam():
 """
 
 
-@pytest.mark.emulation
-def test(tmp_path):
+def test(tmp_path, request):
+    if not request.config.getoption("--run-emulation"):
+        pytest.skip("needs --run-emulation option to run")
+
     project_dir = tmp_path / "project"
     project_with_a_test.generate(project_dir)
 

test/test_from_sdist.py

@@ -0,0 +1,173 @@
+import os
+import subprocess
+import sys
+import textwrap
+from pathlib import Path
+from tempfile import TemporaryDirectory
+from test.test_projects.base import TestProject
+
+from . import test_projects, utils
+
+# utilities
+
+
+def make_sdist(project: TestProject, working_dir: Path) -> Path:
+    project_dir = working_dir / "project"
+    project_dir.mkdir(parents=True, exist_ok=True)
+    project.generate(project_dir)
+
+    sdist_dir = working_dir / "sdist"
+    subprocess.run(
+        [sys.executable, "-m", "build", "--sdist", "--outdir", str(sdist_dir), str(project_dir)],
+        check=True,
+    )
+
+    return next(sdist_dir.glob("*.tar.gz"))
+
+
+def cibuildwheel_from_sdist_run(sdist_path, add_env=None, config_file=None):
+    env = os.environ.copy()
+
+    if add_env:
+        env.update(add_env)
+
+    with TemporaryDirectory() as tmp_output_dir:
+        subprocess.run(
+            [
+                sys.executable,
+                "-m",
+                "cibuildwheel",
+                *(["--config-file", config_file] if config_file else []),
+                "--output-dir",
+                str(tmp_output_dir),
+                str(sdist_path),
+            ],
+            env=env,
+            check=True,
+        )
+        return os.listdir(tmp_output_dir)
+
+
+# tests
+
+
+def test_simple(tmp_path):
+    basic_project = test_projects.new_c_project()
+
+    # make an sdist of the project
+    sdist_dir = tmp_path / "sdist"
+    sdist_dir.mkdir()
+    sdist_path = make_sdist(basic_project, sdist_dir)
+
+    # build the wheels from sdist
+    actual_wheels = cibuildwheel_from_sdist_run(
+        sdist_path,
+        add_env={"CIBW_BUILD": "cp39-*"},
+    )
+
+    # check that the expected wheels are produced
+    expected_wheels = [w for w in utils.expected_wheels("spam", "0.1.0") if "cp39" in w]
+    assert set(actual_wheels) == set(expected_wheels)
+
+
+def test_external_config_file_argument(tmp_path, capfd):
+    basic_project = test_projects.new_c_project()
+
+    # make an sdist of the project
+    sdist_dir = tmp_path / "sdist"
+    sdist_dir.mkdir()
+    sdist_path = make_sdist(basic_project, sdist_dir)
+
+    # add a config file
+    config_file = tmp_path / "config.toml"
+    config_file.write_text(
+        textwrap.dedent(
+            """
+            [tool.cibuildwheel]
+            before-all = 'echo "test log statement from before-all"'
+            """
+        )
+    )
+
+    # build the wheels from sdist
+    actual_wheels = cibuildwheel_from_sdist_run(
+        sdist_path,
+        add_env={"CIBW_BUILD": "cp39-*"},
+        config_file=str(config_file),
+    )
+
+    # check that the expected wheels are produced
+    expected_wheels = [w for w in utils.expected_wheels("spam", "0.1.0") if "cp39" in w]
+    assert set(actual_wheels) == set(expected_wheels)
+
+    # check that before-all was run
+    captured = capfd.readouterr()
+    assert "test log statement from before-all" in captured.out
+
+
+def test_config_in_pyproject_toml(tmp_path, capfd):
+    # make a project with a pyproject.toml
+    project = test_projects.new_c_project()
+    project.files["pyproject.toml"] = textwrap.dedent(
+        """
+        [tool.cibuildwheel]
+        before-build = 'echo "test log statement from before-build 8419"'
+        """
+    )
+
+    # make an sdist of the project
+    sdist_dir = tmp_path / "sdist"
+    sdist_dir.mkdir()
+    sdist_path = make_sdist(project, sdist_dir)
+
+    # build the wheels from sdist
+    actual_wheels = cibuildwheel_from_sdist_run(
+        sdist_path,
+        add_env={"CIBW_BUILD": "cp39-*"},
+    )
+
+    # check that the expected wheels are produced
+    expected_wheels = [w for w in utils.expected_wheels("spam", "0.1.0") if "cp39" in w]
+    assert set(actual_wheels) == set(expected_wheels)
+
+    # check that before-build was run
+    captured = capfd.readouterr()
+    assert "test log statement from before-build 8419" in captured.out
+
+
+def test_internal_config_file_argument(tmp_path, capfd):
+    # make a project with a config file inside
+    project = test_projects.new_c_project(
+        setup_cfg_add="include_package_data = True",
+    )
+    project.files["wheel_build_config.toml"] = textwrap.dedent(
+        """
+        [tool.cibuildwheel]
+        before-all = 'echo "test log statement from before-all 1829"'
+        """
+    )
+    project.files["MANIFEST.in"] = textwrap.dedent(
+        """
+        include wheel_build_config.toml
+        """
+    )
+
+    # make an sdist of the project
+    sdist_dir = tmp_path / "sdist"
+    sdist_dir.mkdir()
+    sdist_path = make_sdist(project, sdist_dir)
+
+    # build the wheels from sdist, referencing the config file inside
+    actual_wheels = cibuildwheel_from_sdist_run(
+        sdist_path,
+        add_env={"CIBW_BUILD": "cp39-*"},
+        config_file="{package}/wheel_build_config.toml",
+    )
+
+    # check that the expected wheels are produced
+    expected_wheels = [w for w in utils.expected_wheels("spam", "0.1.0") if "cp39" in w]
+    assert set(actual_wheels) == set(expected_wheels)
+
+    # check that before-all was run
+    captured = capfd.readouterr()
+    assert "test log statement from before-all 1829" in captured.out

test/test_macos_archs.py

@@ -133,3 +133,36 @@ def test_universal2_testing(tmp_path, capfd, skip_arm64_test):
     expected_wheels = [w for w in ALL_MACOS_WHEELS if "cp39" in w and "universal2" in w]
 
     assert set(actual_wheels) == set(expected_wheels)
+
+
+def test_cp38_arm64_testing(tmp_path, capfd):
+    if utils.platform != "macos":
+        pytest.skip("this test is only relevant to macos")
+    if get_xcode_version() < (12, 2):
+        pytest.skip("this test only works with Xcode 12.2 or greater")
+    if platform.machine() != "arm64":
+        pytest.skip("this test only works on arm64")
+
+    project_dir = tmp_path / "project"
+    basic_project.generate(project_dir)
+
+    actual_wheels = utils.cibuildwheel_run(
+        project_dir,
+        add_env={
+            "CIBW_BUILD": "cp38-*",
+            "CIBW_TEST_COMMAND": '''python -c "import platform; print('running tests on ' + platform.machine())"''',
+            "CIBW_ARCHS": "x86_64,universal2,arm64",
+        },
+    )
+
+    captured = capfd.readouterr()
+
+    assert "running tests on x86_64" in captured.out
+    assert "running tests on arm64" not in captured.out
+
+    warning_message = "While cibuildwheel can build CPython 3.8 universal2/arm64 wheels, we cannot test the arm64 part of them"
+    assert warning_message in captured.err
+
+    expected_wheels = [w for w in ALL_MACOS_WHEELS if "cp38" in w]
+
+    assert set(actual_wheels) == set(expected_wheels)

test/test_manylinuxXXXX_only.py

@@ -21,17 +21,24 @@ project_with_manylinux_symbols = test_projects.new_c_project(
         #if !__GLIBC_PREREQ(2, 5)  /* manylinux1 is glibc 2.5 */
         #error "Must run on a glibc >= 2.5 linux environment"
         #endif
+
+        #if __GLIBC_PREREQ(2, 28)
+        #include <threads.h>
+        #endif
         """
     ),
     spam_c_function_add=textwrap.dedent(
         r"""
-        #if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 24)
+        #if __GLIBC_PREREQ(2, 28)
+            // thrd_equal & thrd_current are only available in manylinux_2_28+
+            sts = thrd_equal(thrd_current(), thrd_current()) ? 0 : 1;;
+        #elif __GLIBC_PREREQ(2, 24)
             // nextupf is only available in manylinux_2_24+
             sts = (int)nextupf(0.0F);
-        #elif defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 17)  /* manylinux2014 is glibc 2.17 */
+        #elif __GLIBC_PREREQ(2, 17)  /* manylinux2014 is glibc 2.17 */
             // secure_getenv is only available in manylinux2014+
             sts = (int)(intptr_t)secure_getenv("NON_EXISTING_ENV_VARIABLE");
-        #elif defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 10)  /* manylinux2010 is glibc 2.12 */
+        #elif __GLIBC_PREREQ(2, 10)  /* manylinux2010 is glibc 2.12 */
             // malloc_info is only available on manylinux2010+
             sts = malloc_info(0, stdout);
         #endif
@@ -41,14 +48,19 @@ project_with_manylinux_symbols = test_projects.new_c_project(
 
 
 @pytest.mark.parametrize(
-    "manylinux_image", ["manylinux1", "manylinux2010", "manylinux2014", "manylinux_2_24"]
+    "manylinux_image",
+    ["manylinux1", "manylinux2010", "manylinux2014", "manylinux_2_24", "manylinux_2_28"],
 )
 def test(manylinux_image, tmp_path):
     if utils.platform != "linux":
-        pytest.skip("the docker test is only relevant to the linux build")
+        pytest.skip("the container image test is only relevant to the linux build")
     elif platform.machine() not in ["x86_64", "i686"]:
         if manylinux_image in ["manylinux1", "manylinux2010"]:
             pytest.skip("manylinux1 and 2010 doesn't exist for non-x86 architectures")
+        elif manylinux_image == "manylinux_2_28" and platform.machine() == "s390x":
+            pytest.skip("manylinux_2_28 doesn't exist for s390x architecture")
+    elif manylinux_image == "manylinux_2_28" and platform.machine() == "i686":
+        pytest.skip("manylinux_2_28 doesn't exist for i686 architecture")
 
     project_dir = tmp_path / "project"
     project_with_manylinux_symbols.generate(project_dir)
@@ -72,8 +84,11 @@ def test(manylinux_image, tmp_path):
         # We don't have a manylinux1 image for PyPy & CPython 3.10 and above
         add_env["CIBW_SKIP"] = "pp* cp31*"
     if manylinux_image in {"manylinux2010"}:
-        # We don't have a manylinux2010 image for PyPy 3.9
-        add_env["CIBW_SKIP"] = "pp39*"
+        # We don't have a manylinux2010 image for PyPy 3.9, CPython 3.11
+        add_env["CIBW_SKIP"] = "pp39* cp311*"
+    if manylinux_image == "manylinux_2_28" and platform.machine() == "x86_64":
+        # We don't have a manylinux_2_28 image for i686
+        add_env["CIBW_ARCHS"] = "x86_64"
 
     actual_wheels = utils.cibuildwheel_run(project_dir, add_env=add_env)
 
@@ -91,7 +106,13 @@ def test(manylinux_image, tmp_path):
     if manylinux_image in {"manylinux1"}:
         # remove PyPy & CPython 3.10 and above
         expected_wheels = [w for w in expected_wheels if "-pp" not in w and "-cp31" not in w]
+
     if manylinux_image in {"manylinux2010"}:
-        # remove PyPy 3.9
-        expected_wheels = [w for w in expected_wheels if "-pp39" not in w]
+        # remove PyPy 3.9 & CPython 3.11
+        expected_wheels = [w for w in expected_wheels if "-pp39" not in w and "-cp311" not in w]
+
+    if manylinux_image == "manylinux_2_28" and platform.machine() == "x86_64":
+        # We don't have a manylinux_2_28 image for i686
+        expected_wheels = [w for w in expected_wheels if "i686" not in w]
+
     assert set(actual_wheels) == set(expected_wheels)

test/test_podman.py

@@ -0,0 +1,38 @@
+import pytest
+
+from . import test_projects, utils
+
+basic_project = test_projects.new_c_project()
+
+
+def test(tmp_path, capfd, request):
+    if utils.platform != "linux":
+        pytest.skip("the test is only relevant to the linux build")
+
+    if not request.config.getoption("--run-podman"):
+        pytest.skip("needs --run-podman option to run")
+
+    project_dir = tmp_path / "project"
+    basic_project.generate(project_dir)
+
+    # build some musllinux and manylinux wheels (ensuring that we use two containers)
+    actual_wheels = utils.cibuildwheel_run(
+        project_dir,
+        add_env={
+            "CIBW_BUILD": "cp310-*{manylinux,musllinux}_x86_64",
+            "CIBW_BEFORE_ALL": "echo 'test log statement from before-all'",
+            "CIBW_CONTAINER_ENGINE": "podman",
+        },
+    )
+
+    # check that the expected wheels are produced
+    expected_wheels = [
+        w
+        for w in utils.expected_wheels("spam", "0.1.0")
+        if ("-cp310-" in w) and ("x86_64" in w) and ("manylinux" in w or "musllinux" in w)
+    ]
+    assert set(actual_wheels) == set(expected_wheels)
+
+    # check that stdout is bring passed-though from container correctly
+    captured = capfd.readouterr()
+    assert "test log statement from before-all" in captured.out

test/test_projects/c.py

@@ -54,6 +54,7 @@ setup(
         'spam',
         sources=['spam.c'],
         libraries=libraries,
+        {{ setup_py_extension_args_add | indent(8) }}
     )],
     {{ setup_py_setup_args_add | indent(4) }}
 )
@@ -73,6 +74,7 @@ def new_c_project(
     spam_c_top_level_add="",
     spam_c_function_add="",
     setup_py_add="",
+    setup_py_extension_args_add="",
     setup_py_setup_args_add="",
     setup_cfg_add="",
 ):
@@ -91,6 +93,7 @@ def new_c_project(
             "spam_c_top_level_add": spam_c_top_level_add,
             "spam_c_function_add": spam_c_function_add,
             "setup_py_add": setup_py_add,
+            "setup_py_extension_args_add": setup_py_extension_args_add,
             "setup_py_setup_args_add": setup_py_setup_args_add,
             "setup_cfg_add": setup_cfg_add,
         }

test/test_same_wheel.py

@@ -0,0 +1,42 @@
+import subprocess
+from test import test_projects
+
+import pytest
+
+from . import utils
+
+basic_project = test_projects.new_c_project()
+basic_project.files[
+    "repair.py"
+] = """
+import shutil
+import sys
+from pathlib import Path
+
+wheel = Path(sys.argv[1])
+dest_dir = Path(sys.argv[2])
+platform = wheel.stem.split("-")[-1]
+name = f"spam-0.1.0-py2-none-{platform}.whl"
+dest = dest_dir / name
+dest_dir.mkdir(parents=True, exist_ok=True)
+if dest.exists():
+    dest.unlink()
+shutil.copy(wheel, dest)
+"""
+
+
+def test(tmp_path, capfd):
+    # this test checks that a generated wheel name shall be unique in a given cibuildwheel run
+    project_dir = tmp_path / "project"
+    basic_project.generate(project_dir)
+
+    with pytest.raises(subprocess.CalledProcessError):
+        utils.cibuildwheel_run(
+            project_dir,
+            add_env={
+                "CIBW_REPAIR_WHEEL_COMMAND": "python repair.py {wheel} {dest_dir}",
+            },
+        )
+
+    captured = capfd.readouterr()
+    assert "Build failed because a wheel named" in captured.err

test/utils.py

@@ -44,7 +44,9 @@ def cibuildwheel_get_build_identifiers(project_path, env=None, *, prerelease_pyt
     return cmd_output.strip().split("\n")
 
 
-def cibuildwheel_run(project_path, package_dir=".", env=None, add_env=None, output_dir=None):
+def cibuildwheel_run(
+    project_path, package_dir=".", env=None, add_env=None, output_dir=None, add_args=None
+):
     """
     Runs cibuildwheel as a subprocess, building the project at project_path.
 
@@ -57,6 +59,7 @@ def cibuildwheel_run(project_path, package_dir=".", env=None, add_env=None, outp
     :param add_env: environment used to update env
     :param output_dir: directory where wheels are saved. If None, a temporary
     directory will be used for the duration of the command.
+    :param add_args: Additional command-line arguments to pass to cibuildwheel.
     :return: list of built wheels (file names).
     """
     if env is None:
@@ -64,6 +67,9 @@ def cibuildwheel_run(project_path, package_dir=".", env=None, add_env=None, outp
         # If present in the host environment, remove the MACOSX_DEPLOYMENT_TARGET for consistency
         env.pop("MACOSX_DEPLOYMENT_TARGET", None)
 
+    if add_args is None:
+        add_args = []
+
     if add_env is not None:
         env.update(add_env)
 
@@ -77,6 +83,7 @@ def cibuildwheel_run(project_path, package_dir=".", env=None, add_env=None, outp
                 "--output-dir",
                 str(output_dir or tmp_output_dir),
                 str(package_dir),
+                *add_args,
             ],
             env=env,
             cwd=project_path,
@@ -106,6 +113,7 @@ def expected_wheels(
     musllinux_versions=None,
     macosx_deployment_target="10.9",
     machine_arch=None,
+    python_abi_tags=None,
 ):
     """
     Returns a list of expected wheels from a run of cibuildwheel.
@@ -132,14 +140,22 @@ def expected_wheels(
     if musllinux_versions is None:
         musllinux_versions = ["musllinux_1_1"]
 
-    python_abi_tags = ["cp36-cp36m", "cp37-cp37m", "cp38-cp38", "cp39-cp39", "cp310-cp310"]
+    if python_abi_tags is None:
+        python_abi_tags = [
+            "cp36-cp36m",
+            "cp37-cp37m",
+            "cp38-cp38",
+            "cp39-cp39",
+            "cp310-cp310",
+            "cp311-cp311",
+        ]
 
-    if machine_arch in ["x86_64", "AMD64", "x86", "aarch64"]:
-        python_abi_tags += ["pp37-pypy37_pp73", "pp38-pypy38_pp73", "pp39-pypy39_pp73"]
+        if machine_arch in ["x86_64", "AMD64", "x86", "aarch64"]:
+            python_abi_tags += ["pp37-pypy37_pp73", "pp38-pypy38_pp73", "pp39-pypy39_pp73"]
 
-    if platform == "macos" and machine_arch == "arm64":
-        # currently, arm64 macs are only supported by cp39 & cp310
-        python_abi_tags = ["cp39-cp39", "cp310-cp310"]
+        if platform == "macos" and machine_arch == "arm64":
+            # arm64 macs are only supported by cp38+
+            python_abi_tags = ["cp38-cp38", "cp39-cp39", "cp310-cp310", "cp311-cp311"]
 
     wheels = []
 
@@ -171,13 +187,13 @@ def expected_wheels(
                 )
 
         elif platform == "windows":
-            if python_abi_tag.startswith("cp"):
-                platform_tags = ["win32", "win_amd64"]
-            else:
+            if python_abi_tag.startswith("pp"):
                 platform_tags = ["win_amd64"]
+            else:
+                platform_tags = ["win32", "win_amd64"]
 
         elif platform == "macos":
-            if python_abi_tag == "cp39-cp39" and machine_arch == "arm64":
+            if machine_arch == "arm64":
                 arm64_macosx_deployment_target = _get_arm64_macosx_deployment_target(
                     macosx_deployment_target
                 )

unit_test/build_ids_test.py

@@ -1,6 +1,11 @@
+import sys
 from typing import Dict, List
 
-import tomli
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli as tomllib
+
 from packaging.version import Version
 
 from cibuildwheel.extra import Printable, dump_python_configurations
@@ -12,7 +17,7 @@ def test_compare_configs():
         txt = f1.read()
 
     with open(resources_dir / "build-platforms.toml", "rb") as f2:
-        dict_txt = tomli.load(f2)
+        dict_txt = tomllib.load(f2)
 
     new_txt = dump_python_configurations(dict_txt)
     print(new_txt)

unit_test/build_selector_test.py

@@ -1,4 +1,3 @@
-import pytest
 from packaging.specifiers import SpecifierSet
 
 from cibuildwheel.util import BuildSelector
@@ -10,6 +9,7 @@ def test_build():
     assert build_selector("cp36-manylinux_x86_64")
     assert build_selector("cp37-manylinux_x86_64")
     assert build_selector("cp310-manylinux_x86_64")
+    assert not build_selector("cp311-manylinux_x86_64")
     assert build_selector("pp36-manylinux_x86_64")
     assert build_selector("pp37-manylinux_x86_64")
     assert build_selector("cp36-manylinux_i686")
@@ -28,11 +28,11 @@ def test_build():
     assert build_selector("cp36-win_amd64")
     assert build_selector("cp37-win_amd64")
     assert build_selector("cp310-win_amd64")
+    assert not build_selector("cp311-win_amd64")
     assert not build_selector("pp36-win_amd64")
     assert not build_selector("pp37-win_amd64")
 
 
-@pytest.mark.skip("this test only makes sense when we have a prerelease python to test with")
 def test_build_filter_pre():
     build_selector = BuildSelector(
         build_config="cp3*-* *-manylinux*",
@@ -41,9 +41,9 @@ def test_build_filter_pre():
     )
 
     assert build_selector("cp37-manylinux_x86_64")
-    assert build_selector("cp310-manylinux_x86_64")
+    assert build_selector("cp311-manylinux_x86_64")
     assert build_selector("cp37-win_amd64")
-    assert build_selector("cp310-win_amd64")
+    assert build_selector("cp311-win_amd64")
 
 
 def test_skip():
@@ -136,3 +136,14 @@ def test_build_limited_python_patch():
 
     assert build_selector("cp36-manylinux_x86_64")
     assert build_selector("cp37-manylinux_x86_64")
+
+
+def test_testing_selector():
+    # local import to avoid pytest trying to collect this as a test class!
+    from cibuildwheel.util import TestSelector
+
+    test_selector = TestSelector(skip_config="cp36-*")
+
+    assert not test_selector("cp36-win_amd64")
+    assert test_selector("cp37-manylinux_x86_64")
+    assert test_selector("cp311-manylinux_x86_64")

unit_test/conftest.py

@@ -8,20 +8,7 @@ MOCK_PACKAGE_DIR = Path("some_package_dir")
 
 def pytest_addoption(parser):
     parser.addoption("--run-docker", action="store_true", default=False, help="run docker tests")
-
-
-def pytest_configure(config):
-    config.addinivalue_line("markers", "docker: mark test requiring docker to run")
-
-
-def pytest_collection_modifyitems(config, items):
-    if config.getoption("--run-docker"):
-        # --run-docker given in cli: do not skip docker tests
-        return
-    skip_docker = pytest.mark.skip(reason="need --run-docker option to run")
-    for item in items:
-        if "docker" in item.keywords:
-            item.add_marker(skip_docker)
+    parser.addoption("--run-podman", action="store_true", default=False, help="run podman tests")
 
 
 @pytest.fixture
@@ -32,7 +19,7 @@ def fake_package_dir(monkeypatch):
     real_path_exists = Path.exists
 
     def mock_path_exists(path):
-        if path == MOCK_PACKAGE_DIR / "setup.py":
+        if str(path).endswith(str(MOCK_PACKAGE_DIR / "setup.py")):
             return True
         else:
             return real_path_exists(path)

unit_test/docker_container_test.py

@@ -1,202 +0,0 @@
-import platform
-import random
-import shutil
-import subprocess
-import textwrap
-from pathlib import Path, PurePath
-
-import pytest
-
-from cibuildwheel.docker_container import DockerContainer
-from cibuildwheel.environment import EnvironmentAssignmentBash
-
-# for these tests we use manylinux2014 images, because they're available on
-# multi architectures and include python3.8
-pm = platform.machine()
-if pm == "x86_64":
-    DEFAULT_IMAGE = "quay.io/pypa/manylinux2014_x86_64:2020-05-17-2f8ac3b"
-elif pm == "aarch64":
-    DEFAULT_IMAGE = "quay.io/pypa/manylinux2014_aarch64:2020-05-17-2f8ac3b"
-elif pm == "ppc64le":
-    DEFAULT_IMAGE = "quay.io/pypa/manylinux2014_ppc64le:2020-05-17-2f8ac3b"
-elif pm == "s390x":
-    DEFAULT_IMAGE = "quay.io/pypa/manylinux2014_s390x:2020-05-17-2f8ac3b"
-
-
-@pytest.mark.docker
-def test_simple():
-    with DockerContainer(docker_image=DEFAULT_IMAGE) as container:
-        assert container.call(["echo", "hello"], capture_output=True) == "hello\n"
-
-
-@pytest.mark.docker
-def test_no_lf():
-    with DockerContainer(docker_image=DEFAULT_IMAGE) as container:
-        assert container.call(["printf", "hello"], capture_output=True) == "hello"
-
-
-@pytest.mark.docker
-def test_environment():
-    with DockerContainer(docker_image=DEFAULT_IMAGE) as container:
-        assert (
-            container.call(
-                ["sh", "-c", "echo $TEST_VAR"], env={"TEST_VAR": "1"}, capture_output=True
-            )
-            == "1\n"
-        )
-
-
-@pytest.mark.docker
-def test_cwd():
-    with DockerContainer(
-        docker_image=DEFAULT_IMAGE, cwd="/cibuildwheel/working_directory"
-    ) as container:
-        assert container.call(["pwd"], capture_output=True) == "/cibuildwheel/working_directory\n"
-        assert container.call(["pwd"], capture_output=True, cwd="/opt") == "/opt\n"
-
-
-@pytest.mark.docker
-def test_container_removed():
-    with DockerContainer(docker_image=DEFAULT_IMAGE) as container:
-        docker_containers_listing = subprocess.run(
-            "docker container ls",
-            shell=True,
-            check=True,
-            stdout=subprocess.PIPE,
-            universal_newlines=True,
-        ).stdout
-        assert container.name is not None
-        assert container.name in docker_containers_listing
-        old_container_name = container.name
-
-    docker_containers_listing = subprocess.run(
-        "docker container ls",
-        shell=True,
-        check=True,
-        stdout=subprocess.PIPE,
-        universal_newlines=True,
-    ).stdout
-    assert old_container_name not in docker_containers_listing
-
-
-@pytest.mark.docker
-def test_large_environment():
-    # max environment variable size is 128kB
-    long_env_var_length = 127 * 1024
-    large_environment = {
-        "a": "0" * long_env_var_length,
-        "b": "0" * long_env_var_length,
-        "c": "0" * long_env_var_length,
-        "d": "0" * long_env_var_length,
-    }
-
-    with DockerContainer(docker_image=DEFAULT_IMAGE) as container:
-        # check the length of d
-        assert (
-            container.call(["sh", "-c", "echo ${#d}"], env=large_environment, capture_output=True)
-            == f"{long_env_var_length}\n"
-        )
-
-
-@pytest.mark.docker
-def test_binary_output():
-    with DockerContainer(docker_image=DEFAULT_IMAGE) as container:
-        # note: the below embedded snippets are in python2
-
-        # check that we can pass though arbitrary binary data without erroring
-        container.call(
-            [
-                "/usr/bin/python2",
-                "-c",
-                textwrap.dedent(
-                    """
-                    import sys
-                    sys.stdout.write(''.join(chr(n) for n in range(0, 256)))
-                    """
-                ),
-            ]
-        )
-
-        # check that we can capture arbitrary binary data
-        output = container.call(
-            [
-                "/usr/bin/python2",
-                "-c",
-                textwrap.dedent(
-                    """
-                    import sys
-                    sys.stdout.write(''.join(chr(n % 256) for n in range(0, 512)))
-                    """
-                ),
-            ],
-            capture_output=True,
-        )
-
-        data = bytes(output, encoding="utf8", errors="surrogateescape")
-
-        for i in range(512):
-            assert data[i] == i % 256
-
-        # check that environment variables can carry binary data, except null characters
-        # (https://www.gnu.org/software/libc/manual/html_node/Environment-Variables.html)
-        binary_data = bytes(n for n in range(1, 256))
-        binary_data_string = str(binary_data, encoding="utf8", errors="surrogateescape")
-        output = container.call(
-            ["python2", "-c", 'import os, sys; sys.stdout.write(os.environ["TEST_VAR"])'],
-            env={"TEST_VAR": binary_data_string},
-            capture_output=True,
-        )
-        assert output == binary_data_string
-
-
-@pytest.mark.docker
-def test_file_operations(tmp_path: Path):
-    with DockerContainer(docker_image=DEFAULT_IMAGE) as container:
-        # test copying a file in
-        test_binary_data = bytes(random.randrange(256) for _ in range(1000))
-        original_test_file = tmp_path / "test.dat"
-        original_test_file.write_bytes(test_binary_data)
-
-        dst_file = PurePath("/tmp/test.dat")
-
-        container.copy_into(original_test_file, dst_file)
-
-        output = container.call(["cat", dst_file], capture_output=True)
-        assert test_binary_data == bytes(output, encoding="utf8", errors="surrogateescape")
-
-
-@pytest.mark.docker
-def test_dir_operations(tmp_path: Path):
-    with DockerContainer(docker_image=DEFAULT_IMAGE) as container:
-        test_binary_data = bytes(random.randrange(256) for _ in range(1000))
-        original_test_file = tmp_path / "test.dat"
-        original_test_file.write_bytes(test_binary_data)
-
-        # test copying a dir in
-        test_dir = tmp_path / "test_dir"
-        test_dir.mkdir()
-        test_file = test_dir / "test.dat"
-        shutil.copyfile(original_test_file, test_file)
-
-        dst_dir = PurePath("/tmp/test_dir")
-        dst_file = dst_dir / "test.dat"
-        container.copy_into(test_dir, dst_dir)
-
-        output = container.call(["cat", dst_file], capture_output=True)
-        assert test_binary_data == bytes(output, encoding="utf8", errors="surrogateescape")
-
-        # test glob
-        assert container.glob(dst_dir, "*.dat") == [dst_file]
-
-        # test copy dir out
-        new_test_dir = tmp_path / "test_dir_new"
-        container.copy_out(dst_dir, new_test_dir)
-
-        assert test_binary_data == (new_test_dir / "test.dat").read_bytes()
-
-
-@pytest.mark.docker
-def test_environment_executor():
-    with DockerContainer(docker_image=DEFAULT_IMAGE) as container:
-        assignment = EnvironmentAssignmentBash("TEST=$(echo 42)")
-        assert assignment.evaluated_value({}, container.environment_executor) == "42"

unit_test/linux_build_steps_test.py

@@ -2,8 +2,8 @@ import textwrap
 from pathlib import Path
 from pprint import pprint
 
-import cibuildwheel.docker_container
 import cibuildwheel.linux
+import cibuildwheel.oci_container
 from cibuildwheel.options import Options
 
 from .utils import get_default_command_line_arguments
@@ -11,7 +11,7 @@ from .utils import get_default_command_line_arguments
 
 def test_linux_container_split(tmp_path: Path, monkeypatch):
     """
-    Tests splitting linux builds by docker image and before_all
+    Tests splitting linux builds by container image and before_all
     """
 
     args = get_default_command_line_arguments()
@@ -21,16 +21,16 @@ def test_linux_container_split(tmp_path: Path, monkeypatch):
         textwrap.dedent(
             """
                 [tool.cibuildwheel]
-                manylinux-x86_64-image = "normal_docker_image"
-                manylinux-i686-image = "normal_docker_image"
+                manylinux-x86_64-image = "normal_container_image"
+                manylinux-i686-image = "normal_container_image"
                 build = "*-manylinux_x86_64"
                 skip = "pp*"
                 archs = "x86_64 i686"
 
                 [[tool.cibuildwheel.overrides]]
                 select = "cp{38,39,310}-*"
-                manylinux-x86_64-image = "other_docker_image"
-                manylinux-i686-image = "other_docker_image"
+                manylinux-x86_64-image = "other_container_image"
+                manylinux-i686-image = "other_container_image"
 
                 [[tool.cibuildwheel.overrides]]
                 select = "cp39-*"
@@ -57,14 +57,14 @@ def test_linux_container_split(tmp_path: Path, monkeypatch):
 
     pprint(build_steps)
 
-    assert build_steps[0].docker_image == "normal_docker_image"
+    assert build_steps[0].container_image == "normal_container_image"
     assert identifiers(build_steps[0]) == ["cp36-manylinux_x86_64", "cp37-manylinux_x86_64"]
     assert before_alls(build_steps[0]) == ["", ""]
 
-    assert build_steps[1].docker_image == "other_docker_image"
+    assert build_steps[1].container_image == "other_container_image"
     assert identifiers(build_steps[1]) == ["cp38-manylinux_x86_64", "cp310-manylinux_x86_64"]
     assert before_alls(build_steps[1]) == ["", ""]
 
-    assert build_steps[2].docker_image == "other_docker_image"
+    assert build_steps[2].container_image == "other_container_image"
     assert identifiers(build_steps[2]) == ["cp39-manylinux_x86_64"]
     assert before_alls(build_steps[2]) == ["echo 'a cp39-only command'"]

unit_test/main_tests/main_options_test.py

@@ -3,11 +3,15 @@ from fnmatch import fnmatch
 from pathlib import Path
 
 import pytest
-import tomli
+
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli as tomllib
 
 from cibuildwheel.__main__ import main
 from cibuildwheel.environment import ParsedEnvironment
-from cibuildwheel.options import BuildOptions, _get_pinned_docker_images
+from cibuildwheel.options import BuildOptions, _get_pinned_container_images
 from cibuildwheel.util import BuildSelector, resources_dir
 
 # CIBW_PLATFORM is tested in main_platform_test.py
@@ -20,13 +24,13 @@ def test_output_dir(platform, intercepted_build_args, monkeypatch):
 
     main()
 
-    assert intercepted_build_args.args[0].globals.output_dir == OUTPUT_DIR
+    assert intercepted_build_args.args[0].globals.output_dir == OUTPUT_DIR.resolve()
 
 
 def test_output_dir_default(platform, intercepted_build_args, monkeypatch):
     main()
 
-    assert intercepted_build_args.args[0].globals.output_dir == Path("wheelhouse")
+    assert intercepted_build_args.args[0].globals.output_dir == Path("wheelhouse").resolve()
 
 
 @pytest.mark.parametrize("also_set_environment", [False, True])
@@ -39,7 +43,7 @@ def test_output_dir_argument(also_set_environment, platform, intercepted_build_a
 
     main()
 
-    assert intercepted_build_args.args[0].globals.output_dir == OUTPUT_DIR
+    assert intercepted_build_args.args[0].globals.output_dir == OUTPUT_DIR.resolve()
 
 
 def test_build_selector(platform, intercepted_build_args, monkeypatch, allow_empty):
@@ -76,6 +80,7 @@ def test_empty_selector(platform, intercepted_build_args, monkeypatch):
         ("x86_64", "manylinux2010", "quay.io/pypa/manylinux2010_x86_64:*"),
         ("x86_64", "manylinux2014", "quay.io/pypa/manylinux2014_x86_64:*"),
         ("x86_64", "manylinux_2_24", "quay.io/pypa/manylinux_2_24_x86_64:*"),
+        ("x86_64", "manylinux_2_28", "quay.io/pypa/manylinux_2_28_x86_64:*"),
         ("x86_64", "custom_image", "custom_image"),
         ("i686", None, "quay.io/pypa/manylinux2014_i686:*"),
         ("i686", "manylinux1", "quay.io/pypa/manylinux1_i686:*"),
@@ -88,6 +93,7 @@ def test_empty_selector(platform, intercepted_build_args, monkeypatch):
         ("pypy_x86_64", "manylinux2010", "quay.io/pypa/manylinux2010_x86_64:*"),
         ("pypy_x86_64", "manylinux2014", "quay.io/pypa/manylinux2014_x86_64:*"),
         ("pypy_x86_64", "manylinux_2_24", "quay.io/pypa/manylinux_2_24_x86_64:*"),
+        ("pypy_x86_64", "manylinux_2_28", "quay.io/pypa/manylinux_2_28_x86_64:*"),
         ("pypy_x86_64", "custom_image", "custom_image"),
     ],
 )
@@ -314,7 +320,7 @@ def test_defaults(platform, intercepted_build_args):
     build_options: BuildOptions = intercepted_build_args.args[0].build_options(identifier=None)
     defaults_config_path = resources_dir / "defaults.toml"
     with defaults_config_path.open("rb") as f:
-        defaults_toml = tomli.load(f)
+        defaults_toml = tomllib.load(f)
 
     root_defaults = defaults_toml["tool"]["cibuildwheel"]
     platform_defaults = defaults_toml["tool"]["cibuildwheel"][platform]
@@ -333,6 +339,6 @@ def test_defaults(platform, intercepted_build_args):
 
     if platform == "linux":
         assert build_options.manylinux_images
-        pinned_images = _get_pinned_docker_images()
+        pinned_images = _get_pinned_container_images()
         default_x86_64_image = pinned_images["x86_64"][defaults["manylinux-x86_64-image"]]
         assert build_options.manylinux_images["x86_64"] == default_x86_64_image

unit_test/main_tests/main_platform_test.py

@@ -60,14 +60,14 @@ def test_platform_argument(platform, intercepted_build_args, monkeypatch):
 
     options = intercepted_build_args.args[0]
 
-    assert options.globals.package_dir == MOCK_PACKAGE_DIR
+    assert options.globals.package_dir == MOCK_PACKAGE_DIR.resolve()
 
 
 def test_platform_environment(platform, intercepted_build_args, monkeypatch):
     main()
     options = intercepted_build_args.args[0]
 
-    assert options.globals.package_dir == MOCK_PACKAGE_DIR
+    assert options.globals.package_dir == MOCK_PACKAGE_DIR.resolve()
 
 
 def test_archs_default(platform, intercepted_build_args, monkeypatch):

unit_test/oci_container_test.py

@@ -0,0 +1,296 @@
+import os
+import platform
+import random
+import shutil
+import subprocess
+import textwrap
+from pathlib import Path, PurePath, PurePosixPath
+
+import pytest
+import tomli_w
+
+from cibuildwheel.environment import EnvironmentAssignmentBash
+from cibuildwheel.oci_container import OCIContainer
+
+# Test utilities
+
+# for these tests we use manylinux2014 images, because they're available on
+# multi architectures and include python3.8
+pm = platform.machine()
+if pm == "x86_64":
+    DEFAULT_IMAGE = "quay.io/pypa/manylinux2014_x86_64:2020-05-17-2f8ac3b"
+elif pm == "aarch64":
+    DEFAULT_IMAGE = "quay.io/pypa/manylinux2014_aarch64:2020-05-17-2f8ac3b"
+elif pm == "ppc64le":
+    DEFAULT_IMAGE = "quay.io/pypa/manylinux2014_ppc64le:2020-05-17-2f8ac3b"
+elif pm == "s390x":
+    DEFAULT_IMAGE = "quay.io/pypa/manylinux2014_s390x:2020-05-17-2f8ac3b"
+else:
+    DEFAULT_IMAGE = ""
+
+
+@pytest.fixture(params=["docker", "podman"])
+def container_engine(request):
+    if request.param == "docker" and not request.config.getoption("--run-docker"):
+        pytest.skip("need --run-docker option to run")
+    if request.param == "podman" and not request.config.getoption("--run-podman"):
+        pytest.skip("need --run-podman option to run")
+    return request.param
+
+
+# Tests
+
+
+def test_simple(container_engine):
+    with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
+        assert container.call(["echo", "hello"], capture_output=True) == "hello\n"
+
+
+def test_no_lf(container_engine):
+    with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
+        assert container.call(["printf", "hello"], capture_output=True) == "hello"
+
+
+def test_debug_info(container_engine):
+    container = OCIContainer(engine=container_engine, image=DEFAULT_IMAGE)
+    print(container.debug_info())
+    with container:
+        pass
+
+
+def test_environment(container_engine):
+    with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
+        assert (
+            container.call(
+                ["sh", "-c", "echo $TEST_VAR"], env={"TEST_VAR": "1"}, capture_output=True
+            )
+            == "1\n"
+        )
+
+
+def test_cwd(container_engine):
+    with OCIContainer(
+        engine=container_engine, image=DEFAULT_IMAGE, cwd="/cibuildwheel/working_directory"
+    ) as container:
+        assert container.call(["pwd"], capture_output=True) == "/cibuildwheel/working_directory\n"
+        assert container.call(["pwd"], capture_output=True, cwd="/opt") == "/opt\n"
+
+
+def test_container_removed(container_engine):
+    with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
+        docker_containers_listing = subprocess.run(
+            f"{container.engine} container ls",
+            shell=True,
+            check=True,
+            stdout=subprocess.PIPE,
+            universal_newlines=True,
+        ).stdout
+        assert container.name is not None
+        assert container.name in docker_containers_listing
+        old_container_name = container.name
+
+    docker_containers_listing = subprocess.run(
+        f"{container.engine} container ls",
+        shell=True,
+        check=True,
+        stdout=subprocess.PIPE,
+        universal_newlines=True,
+    ).stdout
+    assert old_container_name not in docker_containers_listing
+
+
+def test_large_environment(container_engine):
+    # max environment variable size is 128kB
+    long_env_var_length = 127 * 1024
+    large_environment = {
+        "a": "0" * long_env_var_length,
+        "b": "0" * long_env_var_length,
+        "c": "0" * long_env_var_length,
+        "d": "0" * long_env_var_length,
+    }
+
+    with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
+        # check the length of d
+        assert (
+            container.call(["sh", "-c", "echo ${#d}"], env=large_environment, capture_output=True)
+            == f"{long_env_var_length}\n"
+        )
+
+
+def test_binary_output(container_engine):
+    with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
+        # note: the below embedded snippets are in python2
+
+        # check that we can pass though arbitrary binary data without erroring
+        container.call(
+            [
+                "/usr/bin/python2",
+                "-c",
+                textwrap.dedent(
+                    """
+                    import sys
+                    sys.stdout.write(''.join(chr(n) for n in range(0, 256)))
+                    """
+                ),
+            ]
+        )
+
+        # check that we can capture arbitrary binary data
+        output = container.call(
+            [
+                "/usr/bin/python2",
+                "-c",
+                textwrap.dedent(
+                    """
+                    import sys
+                    sys.stdout.write(''.join(chr(n % 256) for n in range(0, 512)))
+                    """
+                ),
+            ],
+            capture_output=True,
+        )
+
+        data = bytes(output, encoding="utf8", errors="surrogateescape")
+
+        for i in range(512):
+            assert data[i] == i % 256
+
+        # check that environment variables can carry binary data, except null characters
+        # (https://www.gnu.org/software/libc/manual/html_node/Environment-Variables.html)
+        binary_data = bytes(n for n in range(1, 256))
+        binary_data_string = str(binary_data, encoding="utf8", errors="surrogateescape")
+        output = container.call(
+            ["python2", "-c", 'import os, sys; sys.stdout.write(os.environ["TEST_VAR"])'],
+            env={"TEST_VAR": binary_data_string},
+            capture_output=True,
+        )
+        assert output == binary_data_string
+
+
+def test_file_operation(tmp_path: Path, container_engine):
+    with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
+        # test copying a file in
+        test_binary_data = bytes(random.randrange(256) for _ in range(1000))
+        original_test_file = tmp_path / "test.dat"
+        original_test_file.write_bytes(test_binary_data)
+
+        dst_file = PurePath("/tmp/test.dat")
+
+        container.copy_into(original_test_file, dst_file)
+
+        output = container.call(["cat", dst_file], capture_output=True)
+        assert test_binary_data == bytes(output, encoding="utf8", errors="surrogateescape")
+
+
+def test_dir_operations(tmp_path: Path, container_engine):
+    with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
+        test_binary_data = bytes(random.randrange(256) for _ in range(1000))
+        original_test_file = tmp_path / "test.dat"
+        original_test_file.write_bytes(test_binary_data)
+
+        # test copying a dir in
+        test_dir = tmp_path / "test_dir"
+        test_dir.mkdir()
+        test_file = test_dir / "test.dat"
+        shutil.copyfile(original_test_file, test_file)
+
+        dst_dir = PurePosixPath("/tmp/test_dir")
+        dst_file = dst_dir / "test.dat"
+        container.copy_into(test_dir, dst_dir)
+
+        output = container.call(["cat", dst_file], capture_output=True)
+        assert test_binary_data == bytes(output, encoding="utf8", errors="surrogateescape")
+
+        # test glob
+        assert container.glob(dst_dir, "*.dat") == [dst_file]
+
+        # test copy dir out
+        new_test_dir = tmp_path / "test_dir_new"
+        container.copy_out(dst_dir, new_test_dir)
+
+        assert test_binary_data == (new_test_dir / "test.dat").read_bytes()
+
+
+def test_environment_executor(container_engine):
+    with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
+        assignment = EnvironmentAssignmentBash("TEST=$(echo 42)")
+        assert assignment.evaluated_value({}, container.environment_executor) == "42"
+
+
+def test_podman_vfs(tmp_path: Path, monkeypatch, request):
+    # Tests podman VFS, for the podman in docker use-case
+    if not request.config.getoption("--run-podman"):
+        pytest.skip("need --run-podman option to run")
+
+    # create the VFS configuration
+    vfs_path = tmp_path / "podman_vfs"
+    vfs_path.mkdir()
+
+    # This requires that we write configuration files and point to them
+    # with environment variables before we run podman
+    # https://github.com/containers/common/blob/main/docs/containers.conf.5.md
+    vfs_containers_conf_data = {
+        "containers": {
+            "default_capabilities": [
+                "CHOWN",
+                "DAC_OVERRIDE",
+                "FOWNER",
+                "FSETID",
+                "KILL",
+                "NET_BIND_SERVICE",
+                "SETFCAP",
+                "SETGID",
+                "SETPCAP",
+                "SETUID",
+                "SYS_CHROOT",
+            ]
+        },
+        "engine": {"cgroup_manager": "cgroupfs", "events_logger": "file"},
+    }
+    # https://github.com/containers/storage/blob/main/docs/containers-storage.conf.5.md
+    storage_root = vfs_path / ".local/share/containers/vfs-storage"
+    run_root = vfs_path / ".local/share/containers/vfs-runroot"
+    storage_root.mkdir(parents=True, exist_ok=True)
+    run_root.mkdir(parents=True, exist_ok=True)
+    vfs_containers_storage_conf_data = {
+        "storage": {
+            "driver": "vfs",
+            "graphroot": os.fspath(storage_root),
+            "runroot": os.fspath(run_root),
+            "rootless_storage_path": os.fspath(storage_root),
+            "options": {
+                # "remap-user": "containers",
+                "aufs": {"mountopt": "rw"},
+                "overlay": {"mountopt": "rw", "force_mask": "shared"},
+                # "vfs": {"ignore_chown_errors": "true"},
+            },
+        }
+    }
+
+    vfs_containers_conf_fpath = vfs_path / "temp_vfs_containers.conf"
+    vfs_containers_storage_conf_fpath = vfs_path / "temp_vfs_containers_storage.conf"
+    with open(vfs_containers_conf_fpath, "wb") as file:
+        tomli_w.dump(vfs_containers_conf_data, file)
+
+    with open(vfs_containers_storage_conf_fpath, "wb") as file:
+        tomli_w.dump(vfs_containers_storage_conf_data, file)
+
+    monkeypatch.setenv("CONTAINERS_CONF", str(vfs_containers_conf_fpath))
+    monkeypatch.setenv("CONTAINERS_STORAGE_CONF", str(vfs_containers_storage_conf_fpath))
+
+    with OCIContainer(engine="podman", image=DEFAULT_IMAGE) as container:
+        # test running a command
+        assert container.call(["echo", "hello"], capture_output=True) == "hello\n"
+
+        # test copying a file into the container
+        (tmp_path / "some_file.txt").write_text("1234")
+        container.copy_into(tmp_path / "some_file.txt", PurePosixPath("some_file.txt"))
+        assert container.call(["cat", "some_file.txt"], capture_output=True) == "1234"
+
+    # Clean up
+
+    # When using the VFS, user is not given write permissions by default in
+    # new directories. As a workaround we use 'podman unshare' to delete them
+    # as UID 0. The reason why permission errors occur on podman is documented
+    # in https://podman.io/blogs/2018/10/03/podman-remove-content-homedir.html
+    subprocess.run(["podman", "unshare", "rm", "-rf", vfs_path], check=True)

unit_test/option_prepare_test.py

@@ -2,7 +2,7 @@ import platform as platform_module
 import subprocess
 import sys
 from contextlib import contextmanager
-from pathlib import Path
+from pathlib import PurePosixPath
 from typing import cast
 from unittest import mock
 
@@ -15,7 +15,7 @@ ALL_IDS = {"cp36", "cp37", "cp38", "cp39", "cp310", "pp37", "pp38", "pp39"}
 
 
 @pytest.fixture
-def mock_build_docker(monkeypatch):
+def mock_build_container(monkeypatch):
     def fail_on_call(*args, **kwargs):
         raise RuntimeError("This should never be called")
 
@@ -35,58 +35,60 @@ def mock_build_docker(monkeypatch):
     monkeypatch.setattr(subprocess, "Popen", fail_on_call)
     monkeypatch.setattr(subprocess, "run", ignore_call)
     monkeypatch.setattr(util, "download", fail_on_call)
-    monkeypatch.setattr("cibuildwheel.linux.DockerContainer", ignore_context_call)
+    monkeypatch.setattr("cibuildwheel.linux.OCIContainer", ignore_context_call)
 
-    monkeypatch.setattr("cibuildwheel.linux.build_on_docker", mock.Mock(spec=linux.build_on_docker))
+    monkeypatch.setattr(
+        "cibuildwheel.linux.build_in_container", mock.Mock(spec=linux.build_in_container)
+    )
     monkeypatch.setattr("cibuildwheel.util.print_new_wheels", ignore_context_call)
 
 
-def test_build_default_launches(mock_build_docker, fake_package_dir, monkeypatch):
+def test_build_default_launches(mock_build_container, fake_package_dir, monkeypatch):
     monkeypatch.setattr(sys, "argv", ["cibuildwheel", "--platform=linux"])
 
     main()
 
-    build_on_docker = cast(mock.Mock, linux.build_on_docker)
+    build_in_container = cast(mock.Mock, linux.build_in_container)
 
-    assert build_on_docker.call_count == 4
+    assert build_in_container.call_count == 4
 
     # In Python 3.8+, this can be simplified to [0].kwargs
-    kwargs = build_on_docker.call_args_list[0][1]
-    assert "quay.io/pypa/manylinux2014_x86_64" in kwargs["docker"]["docker_image"]
-    assert kwargs["docker"]["cwd"] == Path("/project")
-    assert not kwargs["docker"]["simulate_32_bit"]
+    kwargs = build_in_container.call_args_list[0][1]
+    assert "quay.io/pypa/manylinux2014_x86_64" in kwargs["container"]["image"]
+    assert kwargs["container"]["cwd"] == PurePosixPath("/project")
+    assert not kwargs["container"]["simulate_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {f"{x}-manylinux_x86_64" for x in ALL_IDS}
 
-    kwargs = build_on_docker.call_args_list[1][1]
-    assert "quay.io/pypa/manylinux2014_i686" in kwargs["docker"]["docker_image"]
-    assert kwargs["docker"]["cwd"] == Path("/project")
-    assert kwargs["docker"]["simulate_32_bit"]
+    kwargs = build_in_container.call_args_list[1][1]
+    assert "quay.io/pypa/manylinux2014_i686" in kwargs["container"]["image"]
+    assert kwargs["container"]["cwd"] == PurePosixPath("/project")
+    assert kwargs["container"]["simulate_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {f"{x}-manylinux_i686" for x in ALL_IDS}
 
-    kwargs = build_on_docker.call_args_list[2][1]
-    assert "quay.io/pypa/musllinux_1_1_x86_64" in kwargs["docker"]["docker_image"]
-    assert kwargs["docker"]["cwd"] == Path("/project")
-    assert not kwargs["docker"]["simulate_32_bit"]
+    kwargs = build_in_container.call_args_list[2][1]
+    assert "quay.io/pypa/musllinux_1_1_x86_64" in kwargs["container"]["image"]
+    assert kwargs["container"]["cwd"] == PurePosixPath("/project")
+    assert not kwargs["container"]["simulate_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {
         f"{x}-musllinux_x86_64" for x in ALL_IDS for x in ALL_IDS if "pp" not in x
     }
 
-    kwargs = build_on_docker.call_args_list[3][1]
-    assert "quay.io/pypa/musllinux_1_1_i686" in kwargs["docker"]["docker_image"]
-    assert kwargs["docker"]["cwd"] == Path("/project")
-    assert kwargs["docker"]["simulate_32_bit"]
+    kwargs = build_in_container.call_args_list[3][1]
+    assert "quay.io/pypa/musllinux_1_1_i686" in kwargs["container"]["image"]
+    assert kwargs["container"]["cwd"] == PurePosixPath("/project")
+    assert kwargs["container"]["simulate_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {f"{x}-musllinux_i686" for x in ALL_IDS if "pp" not in x}
 
 
-def test_build_with_override_launches(mock_build_docker, monkeypatch, tmp_path):
+def test_build_with_override_launches(mock_build_container, monkeypatch, tmp_path):
     pkg_dir = tmp_path / "cibw_package"
     pkg_dir.mkdir()
 
@@ -113,23 +115,23 @@ before-all = "true"
 
     main()
 
-    build_on_docker = cast(mock.Mock, linux.build_on_docker)
+    build_in_container = cast(mock.Mock, linux.build_in_container)
 
-    assert build_on_docker.call_count == 6
+    assert build_in_container.call_count == 6
 
-    kwargs = build_on_docker.call_args_list[0][1]
-    assert "quay.io/pypa/manylinux2014_x86_64" in kwargs["docker"]["docker_image"]
-    assert kwargs["docker"]["cwd"] == Path("/project")
-    assert not kwargs["docker"]["simulate_32_bit"]
+    kwargs = build_in_container.call_args_list[0][1]
+    assert "quay.io/pypa/manylinux2014_x86_64" in kwargs["container"]["image"]
+    assert kwargs["container"]["cwd"] == PurePosixPath("/project")
+    assert not kwargs["container"]["simulate_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {"cp36-manylinux_x86_64"}
     assert kwargs["options"].build_options("cp36-manylinux_x86_64").before_all == "true"
 
-    kwargs = build_on_docker.call_args_list[1][1]
-    assert "quay.io/pypa/manylinux2014_x86_64" in kwargs["docker"]["docker_image"]
-    assert kwargs["docker"]["cwd"] == Path("/project")
-    assert not kwargs["docker"]["simulate_32_bit"]
+    kwargs = build_in_container.call_args_list[1][1]
+    assert "quay.io/pypa/manylinux2014_x86_64" in kwargs["container"]["image"]
+    assert kwargs["container"]["cwd"] == PurePosixPath("/project")
+    assert not kwargs["container"]["simulate_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {
@@ -137,10 +139,10 @@ before-all = "true"
     }
     assert kwargs["options"].build_options("cp37-manylinux_x86_64").before_all == ""
 
-    kwargs = build_on_docker.call_args_list[2][1]
-    assert "quay.io/pypa/manylinux_2_24_x86_64" in kwargs["docker"]["docker_image"]
-    assert kwargs["docker"]["cwd"] == Path("/project")
-    assert not kwargs["docker"]["simulate_32_bit"]
+    kwargs = build_in_container.call_args_list[2][1]
+    assert "quay.io/pypa/manylinux_2_24_x86_64" in kwargs["container"]["image"]
+    assert kwargs["container"]["cwd"] == PurePosixPath("/project")
+    assert not kwargs["container"]["simulate_32_bit"]
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {
         "cp310-manylinux_x86_64",
@@ -149,28 +151,28 @@ before-all = "true"
         "pp39-manylinux_x86_64",
     }
 
-    kwargs = build_on_docker.call_args_list[3][1]
-    assert "quay.io/pypa/manylinux2014_i686" in kwargs["docker"]["docker_image"]
-    assert kwargs["docker"]["cwd"] == Path("/project")
-    assert kwargs["docker"]["simulate_32_bit"]
+    kwargs = build_in_container.call_args_list[3][1]
+    assert "quay.io/pypa/manylinux2014_i686" in kwargs["container"]["image"]
+    assert kwargs["container"]["cwd"] == PurePosixPath("/project")
+    assert kwargs["container"]["simulate_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {f"{x}-manylinux_i686" for x in ALL_IDS}
 
-    kwargs = build_on_docker.call_args_list[4][1]
-    assert "quay.io/pypa/musllinux_1_1_x86_64" in kwargs["docker"]["docker_image"]
-    assert kwargs["docker"]["cwd"] == Path("/project")
-    assert not kwargs["docker"]["simulate_32_bit"]
+    kwargs = build_in_container.call_args_list[4][1]
+    assert "quay.io/pypa/musllinux_1_1_x86_64" in kwargs["container"]["image"]
+    assert kwargs["container"]["cwd"] == PurePosixPath("/project")
+    assert not kwargs["container"]["simulate_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {
         f"{x}-musllinux_x86_64" for x in ALL_IDS for x in ALL_IDS if "pp" not in x
     }
 
-    kwargs = build_on_docker.call_args_list[5][1]
-    assert "quay.io/pypa/musllinux_1_1_i686" in kwargs["docker"]["docker_image"]
-    assert kwargs["docker"]["cwd"] == Path("/project")
-    assert kwargs["docker"]["simulate_32_bit"]
+    kwargs = build_in_container.call_args_list[5][1]
+    assert "quay.io/pypa/musllinux_1_1_i686" in kwargs["container"]["image"]
+    assert kwargs["container"]["cwd"] == PurePosixPath("/project")
+    assert kwargs["container"]["simulate_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {f"{x}-musllinux_i686" for x in ALL_IDS if "pp" not in x}

unit_test/options_test.py

@@ -4,7 +4,7 @@ import pytest
 
 from cibuildwheel.__main__ import get_build_identifiers
 from cibuildwheel.environment import parse_environment
-from cibuildwheel.options import Options, _get_pinned_docker_images
+from cibuildwheel.options import Options, _get_pinned_container_images
 
 from .utils import get_default_command_line_arguments
 
@@ -34,7 +34,7 @@ def test_options_1(tmp_path, monkeypatch):
         f.write(PYPROJECT_1)
 
     args = get_default_command_line_arguments()
-    args.package_dir = str(tmp_path)
+    args.package_dir = tmp_path
 
     monkeypatch.setattr(platform_module, "machine", lambda: "x86_64")
 
@@ -58,18 +58,18 @@ test_command: 'pyproject'
 
     assert default_build_options.environment == parse_environment('FOO="BAR"')
 
-    all_pinned_docker_images = _get_pinned_docker_images()
-    pinned_x86_64_docker_image = all_pinned_docker_images["x86_64"]
+    all_pinned_container_images = _get_pinned_container_images()
+    pinned_x86_64_container_image = all_pinned_container_images["x86_64"]
 
     local = options.build_options("cp38-manylinux_x86_64")
     assert local.manylinux_images is not None
     assert local.test_command == "pyproject"
-    assert local.manylinux_images["x86_64"] == pinned_x86_64_docker_image["manylinux1"]
+    assert local.manylinux_images["x86_64"] == pinned_x86_64_container_image["manylinux1"]
 
     local = options.build_options("cp37-manylinux_x86_64")
     assert local.manylinux_images is not None
     assert local.test_command == "pyproject-override"
-    assert local.manylinux_images["x86_64"] == pinned_x86_64_docker_image["manylinux2014"]
+    assert local.manylinux_images["x86_64"] == pinned_x86_64_container_image["manylinux2014"]
 
 
 def test_passthrough(tmp_path, monkeypatch):
@@ -77,7 +77,7 @@ def test_passthrough(tmp_path, monkeypatch):
         f.write(PYPROJECT_1)
 
     args = get_default_command_line_arguments()
-    args.package_dir = str(tmp_path)
+    args.package_dir = tmp_path
 
     monkeypatch.setattr(platform_module, "machine", lambda: "x86_64")
     monkeypatch.setenv("EXAMPLE_ENV", "ONE")
@@ -105,7 +105,7 @@ def test_passthrough(tmp_path, monkeypatch):
 )
 def test_passthrough_evil(tmp_path, monkeypatch, env_var_value):
     args = get_default_command_line_arguments()
-    args.package_dir = str(tmp_path)
+    args.package_dir = tmp_path
 
     monkeypatch.setattr(platform_module, "machine", lambda: "x86_64")
     monkeypatch.setenv("CIBW_ENVIRONMENT_PASS_LINUX", "ENV_VAR")

unit_test/utils.py

@@ -1,16 +1,18 @@
+from pathlib import Path
+
 from cibuildwheel.options import CommandLineArguments
 
 
 def get_default_command_line_arguments() -> CommandLineArguments:
-    defaults = CommandLineArguments()
-
-    defaults.platform = "auto"
-    defaults.allow_empty = False
-    defaults.archs = None
-    defaults.config_file = ""
-    defaults.output_dir = None
-    defaults.package_dir = "."
-    defaults.prerelease_pythons = False
-    defaults.print_build_identifiers = False
+    defaults = CommandLineArguments(
+        platform="auto",
+        allow_empty=False,
+        archs=None,
+        config_file="",
+        output_dir=Path("wheelhouse"),
+        package_dir=Path("."),
+        prerelease_pythons=False,
+        print_build_identifiers=False,
+    )
 
     return defaults

unit_test/utils_test.py

@@ -1,4 +1,8 @@
-from cibuildwheel.util import format_safe, prepare_command
+from pathlib import PurePath
+
+import pytest
+
+from cibuildwheel.util import find_compatible_wheel, format_safe, prepare_command
 
 
 def test_format_safe():
@@ -46,3 +50,41 @@ def test_prepare_command():
         prepare_command("{a}{a,b}{b:.2e}{c}{d%s}{e:3}{f[0]}", a="42", b="3.14159")
         == "42{a,b}{b:.2e}{c}{d%s}{e:3}{f[0]}"
     )
+
+
+@pytest.mark.parametrize(
+    "wheel,identifier",
+    (
+        ("foo-0.1-cp38-abi3-win_amd64.whl", "cp310-win_amd64"),
+        ("foo-0.1-cp38-abi3-macosx_11_0_x86_64.whl", "cp310-macosx_x86_64"),
+        ("foo-0.1-cp38-abi3-manylinux2014_x86_64.whl", "cp310-manylinux_x86_64"),
+        ("foo-0.1-cp38-abi3-musllinux_1_1_x86_64.whl", "cp310-musllinux_x86_64"),
+        ("foo-0.1-py2.py3-none-win_amd64.whl", "cp310-win_amd64"),
+        ("foo-0.1-py2.py3-none-win_amd64.whl", "pp310-win_amd64"),
+        ("foo-0.1-py3-none-win_amd64.whl", "cp310-win_amd64"),
+        ("foo-0.1-py38-none-win_amd64.whl", "cp310-win_amd64"),
+        ("foo-0.1-py38-none-win_amd64.whl", "pp310-win_amd64"),
+    ),
+)
+def test_find_compatible_wheel_found(wheel: str, identifier: str):
+    wheel_ = PurePath(wheel)
+    found = find_compatible_wheel([wheel_], identifier)
+    assert found is wheel_
+
+
+@pytest.mark.parametrize(
+    "wheel,identifier",
+    (
+        ("foo-0.1-cp38-abi3-win_amd64.whl", "cp310-win32"),
+        ("foo-0.1-cp38-abi3-win_amd64.whl", "cp37-win_amd64"),
+        ("foo-0.1-cp38-abi3-macosx_11_0_x86_64.whl", "cp310-macosx_universal2"),
+        ("foo-0.1-cp38-abi3-manylinux2014_x86_64.whl", "cp310-musllinux_x86_64"),
+        ("foo-0.1-cp38-abi3-musllinux_1_1_x86_64.whl", "cp310-manylinux_x86_64"),
+        ("foo-0.1-py2-none-win_amd64.whl", "cp310-win_amd64"),
+        ("foo-0.1-py38-none-win_amd64.whl", "cp37-win_amd64"),
+        ("foo-0.1-py38-none-win_amd64.whl", "pp37-win_amd64"),
+        ("foo-0.1-cp38-cp38-win_amd64.whl", "cp310-win_amd64"),
+    ),
+)
+def test_find_compatible_wheel_not_found(wheel: str, identifier: str):
+    assert find_compatible_wheel([PurePath(wheel)], identifier) is None