Merge remote-tracking branch 'origin/master' into deterministic-builds

.circleci/config.yml

@@ -1,11 +1,24 @@
 version: 2
 
 jobs:
-  osx-python2:
+  flake8:
+    docker:
+      - image: circleci/python:3.6
+    steps:
+      - checkout
+
+      - run:
+          name: Install flake8
+          command: sudo python -m pip install flake8
+      - run:
+          name: Test.
+          command: flake8 --exclude=.git,.venv,site .
+
+  osx-python3.6:
     macos:
-      xcode: "10.0.0"
+      xcode: "9.4.1"
     environment:
-      PYTHON: python2
+      PYTHON: python3
     steps:
       - checkout
 
@@ -16,7 +29,7 @@ jobs:
           name: Test.
           command: venv/bin/python ./bin/run_tests.py
 
-  osx-python3:
+  osx-python3.7:
     macos:
       xcode: "10.0.0"
     environment:
@@ -31,23 +44,7 @@ jobs:
           name: Test.
           command: venv/bin/python ./bin/run_tests.py
 
-  linux-python2:
+  linux-python3.6:
-    docker:
-      - image: circleci/python:2.7
-    environment:
-      PYTHON: python2
-    steps:
-      - checkout
-      - setup_remote_docker
-
-      - run:
-          name: Prepare the environment.
-          command: bash .circleci/prepare.sh
-      - run:
-          name: Test.
-          command: venv/bin/python ./bin/run_tests.py
-
-  linux-python3:
     docker:
       - image: circleci/python:3.6
     environment:
@@ -67,7 +64,7 @@ workflows:
   version: 2
   all-tests:
     jobs:
-      - osx-python2
+      - flake8
-      - osx-python3
+      - osx-python3.6
-      - linux-python2
+      - osx-python3.7
-      - linux-python3
+      - linux-python3.6

.circleci/prepare.sh

@@ -1,6 +1,6 @@
 $PYTHON --version
 $PYTHON -m pip --version
-$PYTHON -m pip install -q --user --ignore-installed --upgrade virtualenv
+$PYTHON -m pip install -q --user --ignore-installed --upgrade "virtualenv<20"
 $PYTHON -m virtualenv -p $PYTHON venv
 venv/bin/python -m pip install -r requirements-dev.txt
 venv/bin/python -m pip freeze

.travis.yml

@@ -2,13 +2,6 @@ language: generic
 
 matrix:
   include:
-    # Linux Python 2
-    - sudo: required
-      language: python
-      python: 2.7
-      services: docker
-      env: PYTHON=python
-
     # Linux Python 3
     - sudo: required
       language: python

CI.md

@@ -0,0 +1,9 @@
+This is a summary of the Python versions and platforms covered by the different CI platforms:
+
+|          | 3.5              | 3.6              | 3.7                   | 3.8              |
+|----------|------------------|------------------|-----------------------|------------------|
+| Linux    | Travis CI        | CircleCI         | AppVeyor              | Azure Pipelines  |
+| macOS    | Azure Pipelines  | CircleCI         | Travis CI¹ / CircleCI | Azure Pipelines  |
+| Windows  | TravisCI         | Azure Pipelines  | AppVeyor              | Azure Pipelines  |
+
+> ¹ Python version not really pinned, but dependent on the (default) version of image used.

appveyor.yml

@@ -3,9 +3,9 @@ image:
   - Visual Studio 2015
 
 build_script:
-  - cmd: "C:\\Python27\\python.exe -m pip install -r requirements-dev.txt"
+  - cmd: "C:\\Python37\\python.exe -m pip install -r requirements-dev.txt"
   - sh: "${HOME}/.localpython3.7.4/bin/python3 -m pip install -r requirements-dev.txt"
   # the '-u' flag is required so the output is in the correct order.
   # See https://github.com/joerick/cibuildwheel/pull/24 for more info.
-  - cmd: "C:\\Python27\\python.exe -u ./bin/run_tests.py"
+  - cmd: "C:\\Python37\\python.exe -u ./bin/run_tests.py"
   - sh: "${HOME}/.localpython3.7.4/bin/python3 ./bin/run_tests.py"

azure-pipelines.yml

@@ -1,5 +1,5 @@
 jobs:
-- job: linux
+- job: linux_38
   pool: {vmImage: 'Ubuntu-18.04'}
   steps:
     - task: UsePythonVersion@0
@@ -9,7 +9,17 @@ jobs:
         python -m pip install -r requirements-dev.txt
         python ./bin/run_tests.py
 
-- job: macos
+- job: macos_35
+  pool: {vmImage: 'macOS-10.13'}
+  steps:
+    - task: UsePythonVersion@0
+      inputs:
+        versionSpec: '3.5'
+    - bash: |
+        python -m pip install -r requirements-dev.txt
+        python ./bin/run_tests.py
+
+- job: macos_38
   pool: {vmImage: 'macOS-10.13'}
   steps:
     - task: UsePythonVersion@0
@@ -19,7 +29,19 @@ jobs:
         python -m pip install -r requirements-dev.txt
         python ./bin/run_tests.py
 
-- job: windows
+- job: windows_36
+  pool: {vmImage: 'vs2017-win2016'}
+  steps:
+    - task: UsePythonVersion@0
+      inputs:
+        versionSpec: '3.6'
+    - script: choco install vcpython27 -f -y
+      displayName: Install Visual C++ for Python 2.7
+    - bash: |
+        python -m pip install -r requirements-dev.txt
+        python ./bin/run_tests.py
+
+- job: windows_38
   pool: {vmImage: 'vs2017-win2016'}
   steps:
     - task: UsePythonVersion@0

bin/run_test.py

@@ -1,7 +1,9 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
-from __future__ import print_function
+import argparse
-import os, sys, subprocess, shutil
+import os
+import subprocess
+import sys
 
 
 def single_run(test_project):
@@ -12,8 +14,6 @@ def single_run(test_project):
 
 
 if __name__ == '__main__':
-    import argparse
-
     parser = argparse.ArgumentParser()
     parser.add_argument("test_project_dir")
     args = parser.parse_args()

bin/run_tests.py

@@ -1,18 +1,19 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
-from __future__ import print_function
+import os
-import os, sys, subprocess, shutil, json
+import subprocess
+import sys
 from glob import glob
 
 if __name__ == '__main__':
     # move cwd to the project root
     os.chdir(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
-    ### run the unit tests
+    # run the unit tests
 
     subprocess.check_call([sys.executable, '-m', 'pytest', 'unit_test'])
 
-    ### run the integration tests
+    # run the integration tests
 
     test_projects = sorted(glob('test/??_*'))
 

cibuildwheel/__main__.py

@@ -1,14 +1,24 @@
-from __future__ import print_function
+import argparse
-import argparse, os, subprocess, sys, textwrap
+import os
-try:
+import sys
+import textwrap
+import traceback
 from configparser import ConfigParser
-except ImportError:
-    from ConfigParser import ConfigParser
 
 import cibuildwheel
-import cibuildwheel.linux, cibuildwheel.windows, cibuildwheel.macos
+import cibuildwheel.linux
-from cibuildwheel.environment import parse_environment, EnvironmentParseError
+import cibuildwheel.macos
-from cibuildwheel.util import BuildSelector, DependencyConstraints, Unbuffered
+import cibuildwheel.windows
+from cibuildwheel.environment import (
+    EnvironmentParseError,
+    parse_environment,
+)
+from cibuildwheel.util import (
+    BuildSelector,
+    DependencyConstraints,
+    Unbuffered
+)
+
 
 def get_option_from_environment(option_name, platform=None, default=None):
     '''
@@ -89,7 +99,6 @@ def main():
                   file=sys.stderr)
             exit(2)
 
-
     output_dir = args.output_dir
     test_command = get_option_from_environment('CIBW_TEST_COMMAND', platform=platform)
     test_requires = get_option_from_environment('CIBW_TEST_REQUIRES', platform=platform, default='').split()
@@ -125,9 +134,8 @@ def main():
 
     try:
         environment = parse_environment(environment_config)
-    except (EnvironmentParseError, ValueError) as e:
+    except (EnvironmentParseError, ValueError):
         print('cibuildwheel: Malformed environment option "%s"' % environment_config, file=sys.stderr)
-        import traceback
         traceback.print_exc(None, sys.stderr)
         exit(2)
 
@@ -239,6 +247,7 @@ def detect_obsolete_options():
                 ))
                 os.environ[option] = os.environ[option].replace(deprecated, alternative)
 
+
 def print_preamble(platform, build_options):
     print(textwrap.dedent('''
              _ _       _ _   _       _           _
@@ -249,7 +258,6 @@ def print_preamble(platform, build_options):
 
     print('cibuildwheel version %s\n' % cibuildwheel.__version__)
 
-
     print('Build options:')
     print('  platform: %r' % platform)
     for option, value in sorted(build_options.items()):

cibuildwheel/bashlex_eval.py

@@ -1,9 +1,12 @@
-import subprocess, shlex, sys
+import shlex
+import subprocess
 from collections import namedtuple
+
 import bashlex
 
 NodeExecutionContext = namedtuple('NodeExecutionContext', ['environment', 'input'])
 
+
 def evaluate(value, environment):
     if not value:
         # empty string evaluates to empty string
@@ -60,12 +63,8 @@ def evaluate_word_node(node, context):
 def evaluate_command_node(node, context):
     words = [evaluate_node(part, context=context) for part in node.parts]
     command = ' '.join(words)
-    output = subprocess.check_output(shlex.split(command), env=context.environment)
+    return subprocess.check_output(shlex.split(command), env=context.environment, universal_newlines=True)
 
-    if sys.version_info[0] >= 3:
-        return output.decode('utf8', 'replace')
-    else:
-        return output
 
 def evaluate_parameter_node(node, context):
     return context.environment.get(node.value, '')

cibuildwheel/environment.py

@@ -1,4 +1,5 @@
 import bashlex
+
 from . import bashlex_eval
 
 
@@ -41,7 +42,7 @@ def split_env_items(env_string):
     return result
 
 
-class EnvironmentAssignment(object):
+class EnvironmentAssignment:
     def __init__(self, assignment):
         name, equals, value = assignment.partition('=')
         if not equals:
@@ -60,7 +61,7 @@ class EnvironmentAssignment(object):
         return '%s=%s' % (self.name, self.value)
 
 
-class ParsedEnvironment(object):
+class ParsedEnvironment:
     def __init__(self, assignments):
         self.assignments = assignments
 

cibuildwheel/linux.py

@@ -1,12 +1,15 @@
-from __future__ import print_function
+import os
-import os, subprocess, sys, uuid
+import shlex
+import subprocess
+import sys
+import textwrap
+import uuid
 from collections import namedtuple
-from .util import prepare_command, get_build_verbosity_extra_flags
 
-try:
+from .util import (
-    from shlex import quote as shlex_quote
+    get_build_verbosity_extra_flags,
-except ImportError:
+    prepare_command,
-    from pipes import quote as shlex_quote
+)
 
 
 def get_python_configurations(build_selector):
@@ -49,7 +52,7 @@ def run_docker(command, stdin_str=None):
 def build(project_dir, output_dir, test_command, test_requires, test_extras, before_build, build_verbosity, build_selector, repair_command, environment, manylinux_images, dependency_constraints):
     try:
         subprocess.check_call(['docker', '--version'])
-    except:
+    except Exception:
         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',
@@ -69,20 +72,20 @@ def build(project_dir, output_dir, test_command, test_requires, test_extras, bef
 
         container_name = 'cibuildwheel-{}'.format(uuid.uuid4())
         try:
-            run_docker(['create',
+            subprocess.run(['docker', 'create',
                             '--env', 'CIBUILDWHEEL',
                             '--name', container_name,
                             '-i',
                             '-v', '/:/host', # ignored on CircleCI
                             docker_image, '/bin/bash'])
-            run_docker(['cp', os.path.abspath(project_dir) + '/.', container_name + ':/project'])
+            subprocess.run(['docker', 'cp', os.path.abspath(project_dir) + '/.', container_name + ':/project'])
 
             for config in platform_configs:
                 if dependency_constraints:
                     constraints_file = dependency_constraints.get_for_python_version(config.version)
                     run_docker(['cp', os.path.abspath(constraints_file), container_name + ':/constraints.txt'])
 
-                run_docker(['start', '-i', '-a', container_name], stdin_str='''
+                subprocess.run(['docker', 'start', '-i', '-a', container_name], stdin_str='''
                     set -o errexit
                     set -o xtrace
                     mkdir -p /output
@@ -188,11 +191,36 @@ def build(project_dir, output_dir, test_command, test_requires, test_extras, bef
                 ))
 
             # copy the output back into the host
-            run_docker(['cp', container_name + ':/output/.', os.path.abspath(output_dir)])
+            subprocess.run(['docker', 'cp', container_name + ':/output/.', os.path.abspath(output_dir)])
         except subprocess.CalledProcessError:
             exit(1)
         finally:
             # Still gets executed, even when 'exit(1)' gets called
-            run_docker(['rm', '--force', '-v', container_name])
+            subprocess.run(['docker', 'rm', '--force', '-v', container_name], check=True)
 
 
+def troubleshoot(project_dir, error):
+    if (isinstance(error, subprocess.CalledProcessError) and 'start' in error.cmd):
+        # the bash script failed
+        print('Checking for common errors...')
+        so_files = []
+        for root, dirs, files in os.walk(project_dir):
+            for name in files:
+                _, ext = os.path.splitext(name)
+                if ext == '.so':
+                    so_files.append(os.path.join(root, name))
+
+        if so_files:
+            print(textwrap.dedent('''
+                NOTE: Shared object (.so) files found in this project.
+
+                  These files might be built against the wrong OS, causing problems with
+                  auditwheel.
+
+                  If you're using Cython and have previously done an in-place build,
+                  remove those build files (*.so and *.c) before starting cibuildwheel.
+            '''))
+
+            print('  Files detected:')
+            print('\n'.join(['    ' + f for f in so_files]))
+            print('')

cibuildwheel/macos.py

@@ -1,14 +1,17 @@
-from __future__ import print_function
+import os
+import shlex
+import shutil
+import subprocess
 import tempfile
-import os, subprocess, shlex, sys, shutil
 from collections import namedtuple
 from glob import glob
-try:
-    from shlex import quote as shlex_quote
-except ImportError:
-    from pipes import quote as shlex_quote
 
-from .util import prepare_command, get_build_verbosity_extra_flags, download, get_pip_script
+from .util import (
+    download,
+    get_build_verbosity_extra_flags,
+    prepare_command,
+    get_pip_script
+)
 
 
 def get_python_configurations(build_selector):
@@ -33,9 +36,7 @@ def build(project_dir, output_dir, test_command, test_requires, test_extras, bef
 
     python_configurations = get_python_configurations(build_selector)
 
-    pkgs_output = subprocess.check_output(['pkgutil',  '--pkgs'])
+    pkgs_output = subprocess.check_output(['pkgutil',  '--pkgs'], universal_newlines=True)
-    if sys.version_info[0] >= 3:
-        pkgs_output = pkgs_output.decode('utf8')
     installed_system_packages = pkgs_output.splitlines()
 
     def call(args, env=None, cwd=None, shell=False):
@@ -43,7 +44,7 @@ def build(project_dir, output_dir, test_command, test_requires, test_extras, bef
         if shell:
             print('+ %s' % args)
         else:
-            print('+ ' + ' '.join(shlex_quote(a) for a in args))
+            print('+ ' + ' '.join(shlex.quote(a) for a in args))
 
         return subprocess.check_call(args, env=env, cwd=cwd, shell=shell)
 

cibuildwheel/util.py

@@ -1,13 +1,8 @@
-from fnmatch import fnmatch
-import warnings
 import os
+import urllib.request
+from fnmatch import fnmatch
 from time import sleep
 
-try:
-    from urllib.request import urlopen
-except ImportError:
-    from urllib2 import urlopen
-
 
 def prepare_command(command, **kwargs):
     '''
@@ -28,7 +23,7 @@ def get_build_verbosity_extra_flags(level):
         return []
 
 
-class BuildSelector(object):
+class BuildSelector:
     def __init__(self, build_config, skip_config):
         self.build_patterns = build_config.split()
         self.skip_patterns = skip_config.split()
@@ -43,7 +38,7 @@ class BuildSelector(object):
 
 
 # Taken from https://stackoverflow.com/a/107717
-class Unbuffered(object):
+class Unbuffered:
     def __init__(self, stream):
         self.stream = stream
 
@@ -68,8 +63,8 @@ def download(url, dest):
     repeat_num = 3
     for i in range(repeat_num):
         try:
-            response = urlopen(url)
+            response = urllib.request.urlopen(url)
-        except:
+        except Exception:
             if i == repeat_num - 1:
                 raise
             sleep(3)

cibuildwheel/windows.py

@@ -1,14 +1,16 @@
-from __future__ import print_function
+import os
-import os, tempfile, subprocess, shutil, sys
+import shutil
+import subprocess
+import tempfile
 from collections import namedtuple
 from glob import glob
 
-try:
+from .util import (
-    from shlex import quote as shlex_quote
+    download,
-except ImportError:
+    get_build_verbosity_extra_flags,
-    from pipes import quote as shlex_quote
+    prepare_command,
-
+    get_pip_script,
-from .util import prepare_command, get_build_verbosity_extra_flags, download, get_pip_script
+)
 
 
 IS_RUNNING_ON_AZURE = os.path.exists('C:\\hostedtoolcache')
@@ -26,6 +28,7 @@ def get_nuget_args(configuration):
         python_name = python_name + "x86"
     return [python_name, "-Version", configuration.version, "-OutputDirectory", "C:/cibw/python"]
 
+
 def get_python_configurations(build_selector):
     PythonConfiguration = namedtuple('PythonConfiguration', ['version', 'arch', 'identifier'])
     python_configurations = [

docs/cpp_standards.md

@@ -20,7 +20,7 @@ OS X/macOS allows you to specify a so-called "deployment target" version that wi
 
 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).
 
-To get C++11 and C++14 support, set `MACOSX_DEPLOYMENT_TARGET` to (at least) `"10.9"`.
+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.
 
 To get C++17 support, set `MACOSX_DEPLOYMENT_TARGET` to (at least) `"10.13"` or `"10.14"` (macOS 10.13 offers partial C++17 support; e.g., the filesystem header is in experimental, offering `#include <experimental/filesystem>` instead of `#include <filesystem>`; macOS 10.14 has full C++17 support).
 

docs/mkdocs_include_markdown_plugin/mkdocs_include_markdown_plugin/plugin.py

@@ -1,4 +1,9 @@
-import mkdocs, re, os, io, cgi
+import cgi
+import io
+import os
+import re
+
+import mkdocs
 
 INCLUDE_TAG_REGEX = re.compile(
     r'''
@@ -28,6 +33,7 @@ INCLUDEMARKDOWN_TAG_REGEX = re.compile(
     flags=re.VERBOSE,
 )
 
+
 class ImportMarkdownPlugin(mkdocs.plugins.BasePlugin):
     def on_page_markdown(self, markdown, page, **kwargs):
         page_src_path = page.file.abs_src_path
@@ -49,7 +55,6 @@ class ImportMarkdownPlugin(mkdocs.plugins.BasePlugin):
 
             return text_to_include
 
-
         def found_includemarkdown_tag(match):
             filename = match.group('filename')
             start = match.group('start')
@@ -80,4 +85,3 @@ class ImportMarkdownPlugin(mkdocs.plugins.BasePlugin):
         markdown = re.sub(INCLUDE_TAG_REGEX, found_include_tag, markdown)
         markdown = re.sub(INCLUDEMARKDOWN_TAG_REGEX, found_includemarkdown_tag, markdown)
         return markdown
-    

setup.cfg

@@ -19,3 +19,6 @@ replace = cibuildwheel=={new_version}
 [bdist_wheel]
 universal = 1
 
+[flake8]
+ignore = E501,W503
+application-import-names = cibuildwheel

setup.py

@@ -1,6 +1,6 @@
-#!/usr/bin/env python
 # -*- coding: utf-8 -*-
-import os, io
+import io
+import os
 
 try:
     from setuptools import setup
@@ -28,12 +28,11 @@ setup(
         'cibuildwheel': ['resources/*'],
     },
     # Supported python versions
-    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*',
+    python_requires='>=3.5',
     keywords='ci wheel packaging pypi travis appveyor macos linux windows',
     classifiers=[
         'Intended Audience :: Developers',
         'Natural Language :: English',
-        'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 3',
         'Development Status :: 5 - Production/Stable',
         'License :: OSI Approved :: BSD License',

test/01_basic/cibuildwheel_test.py

@@ -1,9 +1,10 @@
 import os
+
 import utils
 
-
 project_dir = os.path.dirname(__file__)
 
+
 def test():
     # build the wheels
     actual_wheels = utils.cibuildwheel_run(project_dir)
@@ -20,6 +21,6 @@ def test_build_identifiers():
     # can be multiple wheels for each wheel, though, so we need to limit
     # the expected wheels
     expected_wheels = [w for w in utils.expected_wheels('spam', '0.1.0')
-                       if not '-manylinux' in w or '-manylinux1' in w]
+                       if '-manylinux' not in w or '-manylinux1' in w]
     build_identifiers = utils.cibuildwheel_get_build_identifiers(project_dir)
     assert len(expected_wheels) == len(build_identifiers)

test/01_basic/setup.py

@@ -1,6 +1,9 @@
 import os
 
-from setuptools import setup, Extension
+from setuptools import (
+    Extension,
+    setup,
+)
 
 if os.environ.get('CIBUILDWHEEL', '0') != '1':
     raise Exception('CIBUILDWHEEL environment variable is not set to 1')

test/02_test/cibuildwheel_test.py

@@ -1,7 +1,11 @@
-import os, subprocess
+import os
+import subprocess
+
 import pytest
+
 import utils
 
+
 def test():
     project_dir = os.path.dirname(__file__)
 

test/02_test/setup.py

@@ -1,4 +1,7 @@
-from setuptools import setup, Extension
+from setuptools import (
+    Extension,
+    setup,
+)
 
 setup(
     name="spam",

test/02_test/test/spam_test.py

@@ -1,4 +1,5 @@
 from unittest import TestCase
+
 import spam
 
 

test/03_before_build/cibuildwheel_test.py

@@ -1,6 +1,8 @@
 import os
+
 import utils
 
+
 def test():
     project_dir = os.path.dirname(__file__)
 

test/03_before_build/setup.py

@@ -1,5 +1,10 @@
-from setuptools import setup, Extension
+import os
-import sys, os
+import sys
+
+from setuptools import (
+    Extension,
+    setup,
+)
 
 # assert that the Python version as written to pythonversion.txt in the CIBW_BEFORE_BUILD step
 # is the same one as is currently running.

test/04_build_skip/cibuildwheel_test.py

@@ -1,6 +1,8 @@
 import os
+
 import utils
 
+
 def test():
     project_dir = os.path.dirname(__file__)
 

test/04_build_skip/setup.py

@@ -1,6 +1,10 @@
-from setuptools import setup, Extension
 import sys
 
+from setuptools import (
+    Extension,
+    setup,
+)
+
 # explode if run on Python 2.7 or Python 3.4 (these should be skipped)
 if sys.version_info[0:2] == (2, 7):
     raise Exception('Python 2.7 should not be built')

test/05_environment/cibuildwheel_test.py

@@ -1,6 +1,8 @@
 import os
+
 import utils
 
+
 def test():
     project_dir = os.path.dirname(__file__)
 

test/05_environment/setup.py

@@ -1,5 +1,9 @@
-from setuptools import setup, Extension
+import os
-import sys, os
+
+from setuptools import (
+    Extension,
+    setup,
+)
 
 # explode if environment isn't correct, as set in CIBW_ENVIRONMENT
 CIBW_TEST_VAR = os.environ.get('CIBW_TEST_VAR')
@@ -15,7 +19,6 @@ if '/opt/cibw_test_path' not in PATH:
 if '$PATH' in PATH:
     raise Exception('$PATH should be expanded in PATH. It was "%s"' % PATH)
 
-
 setup(
     name="spam",
     ext_modules=[Extension('spam', sources=['spam.c'])],

test/06_docker_images/cibuildwheel_test.py

@@ -1,6 +1,10 @@
-import os, pytest
+import os
+
+import pytest
+
 import utils
 
+
 def test():
     project_dir = os.path.dirname(__file__)
 

test/06_docker_images/setup.py

@@ -1,6 +1,10 @@
-import os, sys
+import os
+import sys
 
-from setuptools import setup, Extension
+from setuptools import (
+    Extension,
+    setup,
+)
 
 # check that we're running in the correct docker image as specified in the
 # environment options CIBW_MANYLINUX1_*_IMAGE

test/07_ssl/cibuildwheel_test.py

@@ -1,6 +1,8 @@
 import os
+
 import utils
 
+
 def test():
     project_dir = os.path.dirname(__file__)
     # this test checks that SSL is working in the build environment using

test/07_ssl/setup.py

@@ -1,6 +1,10 @@
 import ssl
 import sys
-from setuptools import setup, Extension
+
+from setuptools import (
+    Extension,
+    setup,
+)
 
 if sys.version_info[0] == 2:
     from urllib2 import urlopen

test/08_manylinuxXXXX_only/cibuildwheel_test.py

@@ -1,4 +1,7 @@
-import os, pytest
+import os
+
+import pytest
+
 import utils
 
 

test/08_manylinuxXXXX_only/setup.py

@@ -1,4 +1,7 @@
-from setuptools import setup, Extension
+from setuptools import (
+    Extension,
+    setup,
+)
 
 setup(
     name="spam",

test/09_setup_cfg/cibuildwheel_test.py

@@ -1,9 +1,10 @@
 import os
+
 import utils
 
-
 project_dir = os.path.dirname(__file__)
 
+
 def test():
     # build the wheels
     actual_wheels = utils.cibuildwheel_run(project_dir)

test/09_setup_cfg/setup.py

@@ -1,7 +1,7 @@
-import os
+from setuptools import (
-
+    Extension,
-from setuptools import setup, Extension
+    setup,
-
+)
 
 setup(
     ext_modules=[Extension('spam.spam', sources=['spam/spam.c'])],

test/10_cpp_standards/cibuildwheel_test.py

@@ -1,13 +1,12 @@
 import os
-import sys 
 
 import pytest
 
 import utils
 
-
 project_dir = os.path.dirname(__file__)
 
+
 def test_cpp11(tmp_path):
     # This test checks that the C++11 standard is supported
 

test/10_cpp_standards/setup.py

@@ -1,7 +1,11 @@
-import os, sys
+import os
-from setuptools import setup, Extension
 import platform
 
+from setuptools import (
+    Extension,
+    setup,
+)
+
 standard = os.environ["STANDARD"]
 
 language_standard = "/std:c++" + standard if platform.system() == "Windows" else "-std=c++" + standard

test/shared/utils.py

@@ -4,10 +4,12 @@ Utility functions used by the cibuildwheel tests.
 This file is added to the PYTHONPATH in the test runner at bin/run_test.py.
 '''
 
-import subprocess, sys, os, shutil
+import os
-from tempfile import mkdtemp
+import shutil
+import subprocess
+import sys
 from contextlib import contextmanager
-
+from tempfile import mkdtemp
 
 IS_WINDOWS_RUNNING_ON_AZURE = os.path.exists('C:\\hostedtoolcache')
 IS_WINDOWS_RUNNING_ON_TRAVIS = os.environ.get('TRAVIS_OS_NAME') == 'windows'

unit_test/environment_test.py

@@ -1,4 +1,5 @@
 import os
+
 from cibuildwheel.environment import parse_environment
 
 
@@ -13,6 +14,7 @@ def test_basic_parsing():
     assert environment_dict == {'VAR': '1', 'VBR': '2'}
     assert environment_cmds == ['export VAR=1', 'export VBR=2']
 
+
 def test_quotes():
     environment_recipe = parse_environment('A=1 VAR="1 NOT_A_VAR=2" VBR=\'vbr\'')
 
@@ -24,6 +26,7 @@ def test_quotes():
     assert environment_dict == {'A': '1', 'VAR': '1 NOT_A_VAR=2', 'VBR': 'vbr'}
     assert environment_cmds == ['export A=1', 'export VAR="1 NOT_A_VAR=2"', 'export VBR=\'vbr\'']
 
+
 def test_inheritance():
     environment_recipe = parse_environment('PATH=$PATH:/usr/local/bin')
 
@@ -35,6 +38,7 @@ def test_inheritance():
     assert environment_dict == {'PATH': '/usr/bin:/usr/local/bin'}
     assert environment_cmds == ['export PATH=$PATH:/usr/local/bin']
 
+
 def test_shell_eval():
     environment_recipe = parse_environment('VAR="$(echo "a test" string)"')
 
@@ -49,6 +53,7 @@ def test_shell_eval():
     assert environment_dict['VAR'] == 'a test string'
     assert environment_cmds == ['export VAR="$(echo "a test" string)"']
 
+
 def test_shell_eval_and_env():
     environment_recipe = parse_environment('VAR="$(echo "$PREV_VAR" string)"')
 
@@ -60,6 +65,7 @@ def test_shell_eval_and_env():
     assert environment_dict == {'PREV_VAR': '1 2 3', 'VAR': '1 2 3 string'}
     assert environment_cmds == ['export VAR="$(echo "$PREV_VAR" string)"']
 
+
 def test_empty_var():
     environment_recipe = parse_environment('CFLAGS=')
 
@@ -71,6 +77,7 @@ def test_empty_var():
     assert environment_dict == {'CFLAGS': ''}
     assert environment_cmds == ['export CFLAGS=']
 
+
 def test_no_vars():
     environment_recipe = parse_environment('')
 
@@ -80,6 +87,7 @@ def test_no_vars():
     assert environment_dict == {}
     assert environment_cmds == []
 
+
 def test_no_vars_pass_through():
     environment_recipe = parse_environment('')
 

unit_test/main_tests/conftest.py

@@ -1,13 +1,18 @@
-import pytest
-
-import sys
 import os
 import subprocess
+import sys
 
-from cibuildwheel import linux, macos, windows, util
+import pytest
+
+from cibuildwheel import (
+    linux,
+    macos,
+    util,
+    windows,
+)
 
 
-class ArgsInterceptor(object):
+class ArgsInterceptor:
     def __call__(self, *args, **kwargs):
         self.args = args
         self.kwargs = kwargs
@@ -15,6 +20,7 @@ class ArgsInterceptor(object):
 
 MOCK_PROJECT_DIR = 'some_project_dir'
 
+
 @pytest.fixture(autouse=True)
 def mock_protection(monkeypatch):
     '''
@@ -31,13 +37,14 @@ def mock_protection(monkeypatch):
     monkeypatch.setattr(linux, 'build', fail_on_call)
     monkeypatch.setattr(macos, 'build', fail_on_call)
 
+
 @pytest.fixture(autouse=True)
 def fake_project_dir(monkeypatch):
     '''
     Monkey-patch enough for the main() function to run
     '''
-
     real_os_path_exists = os.path.exists
+
     def mock_os_path_exists(path):
         if path == os.path.join(MOCK_PROJECT_DIR, 'setup.py'):
             return True

unit_test/main_tests/main_options_test.py

@@ -1,15 +1,12 @@
-import pytest
-
 import sys
 from fnmatch import fnmatch
 
+import pytest
+
 from cibuildwheel.__main__ import main
 from cibuildwheel.environment import ParsedEnvironment
 from cibuildwheel.util import BuildSelector
 
-from main_util_fixtures import mock_protection, fake_project_dir, platform, intercepted_build_args
-
-
 
 # CIBW_PLATFORM is tested in main_platform_test.py
 
@@ -97,6 +94,7 @@ def get_default_repair_command(platform):
     else:
         raise ValueError('Unknown platform', platform)
 
+
 @pytest.mark.parametrize('repair_command', [None, 'repair', 'repair -w {dest_dir} {wheel}'])
 @pytest.mark.parametrize('platform_specific', [False, True])
 def test_repair_command(repair_command, platform_specific, platform, intercepted_build_args, monkeypatch):
@@ -229,5 +227,3 @@ def test_build_selector_migrations(intercepted_build_args, monkeypatch, option_n
         assert intercepted_build_selector.build_patterns == build_selector_patterns
     else:
         assert intercepted_build_selector.skip_patterns == build_selector_patterns
-
-

unit_test/main_tests/main_platform_test.py

@@ -1,10 +1,10 @@
-import pytest
-
 import sys
 
+import pytest
+
 from cibuildwheel.__main__ import main
 
-from main_util_fixtures import MOCK_PROJECT_DIR, mock_protection, fake_project_dir, platform, intercepted_build_args
+from conftest import MOCK_PROJECT_DIR  # noqa: I100
 
 
 def test_unknown_platform_non_ci(monkeypatch, capsys):