chore: drop python 3.7 for cibuildwheel driver

This drops python 3.7 for cibuildwheel.
Building python 3.6 / 3.7 packages is still supported.

.github/workflows/test.yml

@@ -41,7 +41,7 @@ jobs:
         python_version: ['3.11']
         include:
         - os: ubuntu-22.04
-          python_version: '3.7'
+          python_version: '3.8'
     timeout-minutes: 180
     steps:
     - uses: actions/checkout@v3

.pre-commit-config.yaml

@@ -34,9 +34,9 @@ repos:
   rev: v1.4.1
   hooks:
   - id: mypy
-    name: mypy 3.7 on cibuildwheel/
+    name: mypy 3.8 on cibuildwheel/
     exclude: ^cibuildwheel/resources/.*py$
-    args: ["--python-version=3.7"]
+    args: ["--python-version=3.8"]
     additional_dependencies: &mypy-dependencies
       - nox
       - packaging

.travis.yml

@@ -8,21 +8,21 @@ branches:
 
 jobs:
   include:
-    - name: Linux | x86_64 + i686 | Python 3.7
-      python: 3.7
+    - name: Linux | x86_64 + i686 | Python 3.9
+      python: 3.9
       services: docker
       env: PYTHON=python
 
-    - name: Linux | arm64 | Python 3.7
-      python: 3.7
+    - name: Linux | arm64 | Python 3.9
+      python: 3.9
       services: docker
       arch: arm64-graviton2
       group: edge
       virt: vm
       env: PYTHON=python
 
-    - name: Linux | ppc64le | Python 3.7
-      python: 3.7
+    - name: Linux | ppc64le | Python 3.9
+      python: 3.9
       services: docker
       arch: ppc64le
       allow_failure: True
@@ -32,16 +32,16 @@ jobs:
         # c.f. https://travis-ci.community/t/running-out-of-disk-space-quota-when-using-docker-on-ppc64le/11634
         - PYTEST_ADDOPTS='-k "not test_manylinuxXXXX_only"'
 
-    - name: Windows | x86_64 | Python 3.7
+    - name: Windows | x86_64 | Python 3.9
       os: windows
       language: shell
       before_install:
-        - choco upgrade python3 -y --version 3.7.9 --limit-output
+        - choco upgrade python3 -y --version 3.9.13 --limit-output --params "/InstallDir:C:\\Python39"
       env:
-        - PYTHON=C:\\Python37\\python
+        - PYTHON=C:\\Python39\\python
 
-    - name: Linux | s390x | Python 3.7
-      python: 3.7
+    - name: Linux | s390x | Python 3.9
+      python: 3.9
       services: docker
       arch: s390x
       env: PYTHON=python

CI.md

@@ -1,11 +1,11 @@
 This is a summary of the Python versions and platforms covered by the different CI platforms:
 
-|         | 3.7       | 3.8                                   | 3.9       | 3.10      | 3.11           |
-|---------|-----------|---------------------------------------|-----------|-----------|----------------|
-| Linux   | Travis CI | AppVeyor¹ / Azure Pipelines / GitLab¹ | CircleCI¹ | Cirrus CI | GitHub Actions |
-| macOS   | Travis CI | AppVeyor¹ / Azure Pipelines           | CircleCI¹ | Cirrus CI | GitHub Actions |
-| Windows | Travis CI | AppVeyor¹ / Azure Pipelines / GitLab¹ |           | Cirrus CI | GitHub Actions |
+|         | 3.8                                                    | 3.9                   | 3.10      | 3.11           |
+|---------|--------------------------------------------------------|-----------------------|-----------|----------------|
+| Linux   | AppVeyor¹ / Azure Pipelines / GitLab¹ / GitHub Actions | CircleCI¹ / Travis CI | Cirrus CI | GitHub Actions |
+| macOS   | AppVeyor¹ / Azure Pipelines                            | CircleCI¹ / Travis CI | Cirrus CI | GitHub Actions |
+| Windows | AppVeyor¹ / Azure Pipelines / GitLab¹                  | Travis CI             | Cirrus CI | GitHub Actions |
 
 > ¹ Runs a reduced set of tests to reduce CI load
 
-Non-x86 architectures are covered on Travis CI using Python 3.7.
+Non-x86 architectures are covered on Travis CI using Python 3.9.

action.yml

@@ -28,7 +28,7 @@ runs:
     - uses: actions/setup-python@v4
       id: python
       with:
-        python-version: "3.7 - 3.11"
+        python-version: "3.8 - 3.11"
         update-environment: false
 
     # Redirecting stderr to stdout to fix interleaving issue in Actions.

bin/update_pythons.py

@@ -7,7 +7,7 @@ import difflib
 import logging
 from collections.abc import Mapping, MutableMapping
 from pathlib import Path
-from typing import Any, Union
+from typing import Any, Final, Literal, TypedDict, Union
 
 import click
 import requests
@@ -18,7 +18,6 @@ from rich.logging import RichHandler
 from rich.syntax import Syntax
 
 from cibuildwheel._compat import tomllib
-from cibuildwheel._compat.typing import Final, Literal, TypedDict
 from cibuildwheel.extra import dump_python_configurations
 
 log = logging.getLogger("cibw")

bin/update_virtualenv.py

@@ -7,6 +7,7 @@ import logging
 import subprocess
 from dataclasses import dataclass
 from pathlib import Path
+from typing import Final
 
 import click
 import rich
@@ -15,7 +16,6 @@ from rich.logging import RichHandler
 from rich.syntax import Syntax
 
 from cibuildwheel._compat import tomllib
-from cibuildwheel._compat.typing import Final
 
 log = logging.getLogger("cibw")
 

cibuildwheel/__main__.py

@@ -10,13 +10,14 @@ import typing
 from collections.abc import Iterable, Sequence, Set
 from pathlib import Path
 from tempfile import mkdtemp
+from typing import Protocol
 
 import cibuildwheel
 import cibuildwheel.linux
 import cibuildwheel.macos
 import cibuildwheel.util
 import cibuildwheel.windows
-from cibuildwheel._compat.typing import Protocol, assert_never
+from cibuildwheel._compat.typing import assert_never
 from cibuildwheel.architecture import Architecture, allowed_architectures_check
 from cibuildwheel.logger import log
 from cibuildwheel.options import CommandLineArguments, Options, compute_options

cibuildwheel/_compat/_functools_cached_property_38.py

@@ -1,66 +0,0 @@
-from __future__ import annotations
-
-import typing
-from collections.abc import Callable
-from threading import RLock
-from typing import Any, Generic, TypeVar
-
-__all__ = ["cached_property"]
-
-_NOT_FOUND = object()
-
-_T = TypeVar("_T")
-
-
-class cached_property(Generic[_T]):
-    def __init__(self, func: Callable[[Any], _T]):
-        self.func = func
-        self.attrname: str | None = None
-        self.__doc__ = func.__doc__
-        self.lock = RLock()
-
-    def __set_name__(self, owner: type[Any], name: str) -> None:
-        if self.attrname is None:
-            self.attrname = name
-        elif name != self.attrname:
-            msg = f"Cannot assign the same cached_property to two different names ({self.attrname!r} and {name!r})."
-            raise TypeError(msg)
-
-    @typing.overload
-    def __get__(self, instance: None, owner: type[Any] | None = ...) -> cached_property[_T]:
-        ...
-
-    @typing.overload
-    def __get__(self, instance: object, owner: type[Any] | None = ...) -> _T:
-        ...
-
-    def __get__(self, instance: object | None, owner: type[Any] | None = None) -> Any:
-        if instance is None:
-            return self
-        if self.attrname is None:
-            msg = "Cannot use cached_property instance without calling __set_name__ on it."
-            raise TypeError(msg)
-        try:
-            cache = instance.__dict__
-        except AttributeError:  # not all objects have __dict__ (e.g. class defines slots)
-            msg = (
-                f"No '__dict__' attribute on {type(instance).__name__!r} "
-                f"instance to cache {self.attrname!r} property."
-            )
-            raise TypeError(msg) from None
-        val = cache.get(self.attrname, _NOT_FOUND)
-        if val is _NOT_FOUND:
-            with self.lock:
-                # check if another thread filled cache while we awaited lock
-                val = cache.get(self.attrname, _NOT_FOUND)
-                if val is _NOT_FOUND:
-                    val = self.func(instance)
-                    try:
-                        cache[self.attrname] = val
-                    except TypeError:
-                        msg = (
-                            f"The '__dict__' attribute on {type(instance).__name__!r} instance "
-                            f"does not support item assignment for caching {self.attrname!r} property."
-                        )
-                        raise TypeError(msg) from None
-        return val

cibuildwheel/_compat/functools.py

@@ -1,10 +0,0 @@
-from __future__ import annotations
-
-import sys
-
-if sys.version_info >= (3, 8):
-    from functools import cached_property
-else:
-    from ._functools_cached_property_38 import cached_property
-
-__all__ = ("cached_property",)

cibuildwheel/_compat/typing.py

@@ -2,23 +2,12 @@ from __future__ import annotations
 
 import sys
 
-if sys.version_info < (3, 8):
-    from typing_extensions import Final, Literal, OrderedDict, Protocol, TypedDict
-else:
-    from typing import Final, Literal, OrderedDict, Protocol, TypedDict  # noqa: TID251
-
 if sys.version_info < (3, 11):
     from typing_extensions import NotRequired, assert_never
 else:
     from typing import NotRequired, assert_never  # noqa: TID251
 
 __all__ = (
-    "Final",
-    "Literal",
-    "Protocol",
-    "Protocol",
-    "TypedDict",
-    "OrderedDict",
     "assert_never",
     "NotRequired",
 )

cibuildwheel/architecture.py

@@ -6,8 +6,9 @@ import re
 import sys
 from collections.abc import Set
 from enum import Enum
+from typing import Final, Literal
 
-from ._compat.typing import Final, Literal, assert_never
+from ._compat.typing import assert_never
 from .typing import PlatformName
 
 PRETTY_NAMES: Final[dict[PlatformName, str]] = {

cibuildwheel/environment.py

@@ -2,13 +2,12 @@ from __future__ import annotations
 
 import dataclasses
 from collections.abc import Mapping, Sequence
-from typing import Any
+from typing import Any, Protocol
 
 import bashlex
 import bashlex.errors
 
 from . import bashlex_eval
-from ._compat.typing import Protocol
 
 
 class EnvironmentParseError(Exception):

cibuildwheel/extra.py

@@ -6,8 +6,7 @@ from __future__ import annotations
 
 from collections.abc import Mapping, Sequence
 from io import StringIO
-
-from ._compat.typing import Protocol
+from typing import Protocol
 
 __all__ = ("Printable", "dump_python_configurations")
 

cibuildwheel/linux.py

@@ -6,9 +6,9 @@ import textwrap
 from collections.abc import Iterable, Iterator, Sequence, Set
 from dataclasses import dataclass
 from pathlib import Path, PurePath, PurePosixPath
-from typing import Tuple
+from typing import OrderedDict, Tuple
 
-from ._compat.typing import OrderedDict, assert_never
+from ._compat.typing import assert_never
 from .architecture import Architecture
 from .logger import log
 from .oci_container import OCIContainer

cibuildwheel/logger.py

@@ -5,9 +5,8 @@ import os
 import re
 import sys
 import time
-from typing import IO, AnyStr, Tuple
+from typing import IO, AnyStr, Final, Tuple
 
-from ._compat.typing import Final
 from .util import CIProvider, detect_ci_provider
 
 FoldPattern = Tuple[str, str]

cibuildwheel/macos.py

@@ -12,11 +12,11 @@ import typing
 from collections.abc import Sequence, Set
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Tuple
+from typing import Literal, Tuple
 
 from filelock import FileLock
 
-from ._compat.typing import Literal, assert_never
+from ._compat.typing import assert_never
 from .architecture import Architecture
 from .environment import ParsedEnvironment
 from .logger import log

cibuildwheel/oci_container.py

@@ -14,9 +14,8 @@ from collections.abc import Mapping, Sequence
 from dataclasses import dataclass
 from pathlib import Path, PurePath, PurePosixPath
 from types import TracebackType
-from typing import IO, Dict
+from typing import IO, Dict, Literal
 
-from ._compat.typing import Literal
 from .typing import PathOrStr, PopenBytes
 from .util import CIProvider, detect_ci_provider, parse_key_value_string
 

cibuildwheel/options.py

@@ -12,12 +12,12 @@ import textwrap
 import traceback
 from collections.abc import Callable, Generator, Iterable, Iterator, Mapping, Set
 from pathlib import Path
-from typing import Any, Dict, List, Union
+from typing import Any, Dict, List, Literal, TypedDict, Union
 
 from packaging.specifiers import SpecifierSet
 
 from ._compat import tomllib
-from ._compat.typing import Literal, NotRequired, TypedDict
+from ._compat.typing import NotRequired
 from .architecture import Architecture
 from .environment import EnvironmentParseError, ParsedEnvironment, parse_environment
 from .logger import log

cibuildwheel/projectfiles.py

@@ -3,24 +3,10 @@ from __future__ import annotations
 import ast
 import configparser
 import contextlib
-import sys
 from pathlib import Path
-from typing import Any
 
 from ._compat import tomllib
 
-if sys.version_info < (3, 8):
-    Constant = ast.Str
-
-    def get_constant(x: ast.Str) -> str:
-        return x.s
-
-else:
-    Constant = ast.Constant
-
-    def get_constant(x: ast.Constant) -> Any:
-        return x.value
-
 
 class Analyzer(ast.NodeVisitor):
     def __init__(self) -> None:
@@ -39,9 +25,9 @@ class Analyzer(ast.NodeVisitor):
         if (
             node.arg == "python_requires"
             and not hasattr(node.parent.parent.parent, "parent")  # type: ignore[attr-defined]
-            and isinstance(node.value, Constant)
+            and isinstance(node.value, ast.Constant)
         ):
-            self.requires_python = get_constant(node.value)
+            self.requires_python = node.value.value
 
 
 def setup_py_python_requires(content: str) -> str | None:

cibuildwheel/typing.py

@@ -3,9 +3,7 @@ from __future__ import annotations
 import os
 import subprocess
 import typing
-from typing import Union
-
-from ._compat.typing import Final, Literal, Protocol
+from typing import Final, Literal, Protocol, Union
 
 __all__ = (
     "PLATFORMS",

cibuildwheel/util.py

@@ -17,10 +17,10 @@ from collections import defaultdict
 from collections.abc import Generator, Iterable, Mapping, Sequence
 from dataclasses import dataclass
 from enum import Enum
-from functools import lru_cache
+from functools import cached_property, lru_cache
 from pathlib import Path, PurePath
 from time import sleep
-from typing import Any, ClassVar, TextIO, TypeVar
+from typing import Any, ClassVar, Final, Literal, TextIO, TypeVar
 
 import bracex
 import certifi
@@ -32,8 +32,6 @@ from packaging.version import Version
 from platformdirs import user_cache_path
 
 from ._compat import tomllib
-from ._compat.functools import cached_property
-from ._compat.typing import Final, Literal
 from .typing import PathOrStr, PlatformName
 
 __all__ = [

pyproject.toml

@@ -7,7 +7,7 @@ build-backend = "setuptools.build_meta"
 
 [tool.black]
 line-length = 100
-target-version = ['py37', 'py38', 'py39', 'py310', 'py311']
+target-version = ['py38', 'py39', 'py310', 'py311']
 
 
 [tool.pytest.ini_options]
@@ -20,7 +20,7 @@ log_cli_level = "info"
 
 
 [tool.mypy]
-python_version = 3.7
+python_version = 3.8
 files = [
     "cibuildwheel/*.py",
     "test/**/*.py",
@@ -79,7 +79,7 @@ ignore = [
 ]
 
 [tool.pylint]
-py-version = "3.7"
+py-version = "3.8"
 jobs = "0"
 fail-on = ["E", "F"]
 fail-under = "9.8"
@@ -154,11 +154,6 @@ flake8-unused-arguments.ignore-variadic-names = true
 "typing.Iterator".msg = "Use collections.abc.Iterator instead."
 "typing.Sequence".msg = "Use collections.abc.Sequence instead."
 "typing.Set".msg = "Use collections.abc.Set instead."
-"typing.Protocol".msg = "Use cibuildwheel._compat.typing.Protocol instead."
-"typing.Final".msg = "Use cibuildwheel._compat.typing.Final instead."
-"typing.Literal".msg = "Use cibuildwheel._compat.typing.Literal instead."
-"typing.OrderedDict".msg = "Use cibuildwheel._compat.typing.OrderedDict instead."
-"typing.TypedDict".msg = "Use cibuildwheel._compat.typing.TypedDict instead."
 "typing.NotRequired".msg = "Use cibuildwheel._compat.typing.NotRequired instead."
 "typing.assert_never".msg = "Use cibuildwheel._compat.typing.assert_never instead."
 "tomllib".msg = "Use cibuildwheel._compat.tomllib instead."

setup.cfg

@@ -16,7 +16,6 @@ classifiers =
     Natural Language :: English
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3 :: Only
-    Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
@@ -39,7 +38,7 @@ install_requires =
     platformdirs
     tomli;python_version < '3.11'
     typing-extensions>=4.1.0;python_version < '3.11'
-python_requires = >=3.7
+python_requires = >=3.8
 include_package_data = True
 zip_safe = False