Use patlib.Path in tests and tools

bin/run_tests.py

@@ -3,10 +3,11 @@
 import os
 import subprocess
 import sys
+from pathlib import Path
 
 if __name__ == '__main__':
     # move cwd to the project root
-    os.chdir(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+    os.chdir(Path(__file__).resolve().parents[1])
 
     # run the unit tests
     subprocess.check_call([sys.executable, '-m', 'pytest', 'unit_test'])

docs/mkdocs_include_markdown_plugin/mkdocs_include_markdown_plugin/plugin.py

@@ -1,7 +1,6 @@
 import cgi
-import io
-import os
 import re
+from pathlib import Path
 
 import mkdocs
 
@@ -41,13 +40,12 @@ class ImportMarkdownPlugin(mkdocs.plugins.BasePlugin):
         def found_include_tag(match):
             filename = match.group('filename')
 
-            file_path_abs = os.path.join(os.path.dirname(page_src_path), filename)
+            file_path_abs = Path(page_src_path).parent / filename
 
-            if not os.path.exists(file_path_abs):
+            if not file_path_abs.exists():
                 raise ValueError('file not found', filename)
 
-            with io.open(file_path_abs, encoding='utf8') as f:
-                text_to_include = f.read()
+            text_to_include = file_path_abs.read_text(encoding='utf8')
 
             # Allow good practice of having a final newline in the file
             if text_to_include.endswith('\n'):
@@ -60,13 +58,12 @@ class ImportMarkdownPlugin(mkdocs.plugins.BasePlugin):
             start = match.group('start')
             end = match.group('end')
 
-            file_path_abs = os.path.join(os.path.dirname(page_src_path), filename)
+            file_path_abs = Path(page_src_path).parent / filename
 
-            if not os.path.exists(file_path_abs):
+            if not file_path_abs.exists():
                 raise ValueError('file not found', filename)
 
-            with io.open(file_path_abs, encoding='utf8') as f:
-                text_to_include = f.read()
+            text_to_include = file_path_abs.read_text(encoding='utf8')
 
             if start:
                 _, _, text_to_include = text_to_include.partition(start)

setup.py

@@ -1,15 +1,13 @@
 # -*- coding: utf-8 -*-
-import io
-import os
+from pathlib import Path
 
 try:
     from setuptools import setup
 except ImportError:
     from distutils.core import setup
 
-this_directory = os.path.dirname(__file__)
-with io.open(os.path.join(this_directory, 'README.md'), encoding='utf-8') as f:
-    long_description = f.read()
+this_directory = Path(__file__).parent
+long_description = this_directory.joinpath('README.md').read_text(encoding='utf-8')
 
 setup(
     name='cibuildwheel',

test/test_dependency_versions.py

@@ -1,4 +1,3 @@
-import os
 import re
 import pytest
 import textwrap
@@ -39,11 +38,9 @@ VERSION_REGEX = r'([\w-]+)==([^\s]+)'
 
 
 def get_versions_from_constraint_file(constraint_file):
-    with open(constraint_file, encoding='utf8') as f:
-        constraint_file_text = f.read()
+    constraint_file_text = constraint_file.read_text(encoding='utf8')
 
     versions = {}
-
     for package, version in re.findall(VERSION_REGEX, constraint_file_text):
         versions[package] = version
 
@@ -73,7 +70,7 @@ def test_pinned_versions(tmp_path, python_version):
         constraint_filename = 'constraints.txt'
         build_pattern = '[cp]p38-*'
 
-    constraint_file = os.path.join(cibuildwheel.util.resources_dir, constraint_filename)
+    constraint_file = cibuildwheel.util.resources_dir / constraint_filename
     constraint_versions = get_versions_from_constraint_file(constraint_file)
 
     for package in ['pip', 'setuptools', 'wheel', 'virtualenv']:

test/test_projects/base.py

@@ -1,5 +1,7 @@
-import os
+from pathlib import Path
+
 import jinja2
+
 from typing import Union, Dict, Any
 
 
@@ -21,12 +23,12 @@ class TestProject:
         self.files = {}
         self.template_context = {}
 
-    def generate(self, path: str):
+    def generate(self, path: Path):
         for filename, content in self.files.items():
-            file_path = os.path.join(path, filename)
-            os.makedirs(os.path.dirname(file_path), exist_ok=True)
+            file_path = path / filename
+            file_path.parent.mkdir(parents=True, exist_ok=True)
 
-            with open(file_path, 'w', encoding='utf8') as f:
+            with file_path.open('w', encoding='utf8') as f:
                 if isinstance(content, jinja2.Template):
                     content = content.render(self.template_context)
 

test/test_subdir_package.py

@@ -1,4 +1,4 @@
-import os
+from pathlib import Path
 
 import jinja2
 
@@ -35,7 +35,7 @@ def test(capfd, tmp_path):
     project_dir = tmp_path / 'project'
     subdir_package_project.generate(project_dir)
 
-    package_dir = os.path.join('src', 'spam')
+    package_dir = Path('src', 'spam')
     # build the wheels
     actual_wheels = utils.cibuildwheel_run(project_dir, package_dir=package_dir, add_env={
         'CIBW_BEFORE_BUILD': 'python {project}/bin/before_build.py',

test/utils.py

@@ -10,9 +10,10 @@ import shutil
 import subprocess
 import sys
 from contextlib import contextmanager
+from pathlib import Path
 from tempfile import mkdtemp
 
-IS_WINDOWS_RUNNING_ON_AZURE = os.path.exists('C:\\hostedtoolcache')
+IS_WINDOWS_RUNNING_ON_AZURE = Path('C:\\hostedtoolcache').exists()
 IS_WINDOWS_RUNNING_ON_TRAVIS = os.environ.get('TRAVIS_OS_NAME') == 'windows'
 
 
@@ -66,7 +67,7 @@ def cibuildwheel_run(project_path, package_dir='.', env=None, add_env=None, outp
 
     with TemporaryDirectoryIfNone(output_dir) as _output_dir:
         subprocess.check_call(
-            [sys.executable, '-m', 'cibuildwheel', '--output-dir', str(_output_dir), package_dir],
+            [sys.executable, '-m', 'cibuildwheel', '--output-dir', str(_output_dir), str(package_dir)],
             env=env,
             cwd=project_path,
         )

unit_test/dependency_constraints_test.py

@@ -1,30 +1,16 @@
 from cibuildwheel.util import DependencyConstraints
-import os
+
+from pathlib import Path
 
 
 def test_defaults():
     dependency_constraints = DependencyConstraints.with_defaults()
 
-    project_root = os.path.dirname(os.path.dirname(__file__))
-    resources_dir = os.path.join(project_root, 'cibuildwheel', 'resources')
+    project_root = Path(__file__).parents[1]
+    resources_dir = project_root / 'cibuildwheel' / 'resources'
 
-    assert os.path.samefile(
-        dependency_constraints.base_file_path,
-        os.path.join(resources_dir, 'constraints.txt')
-    )
-    assert os.path.samefile(
-        dependency_constraints.get_for_python_version('3.8'),
-        os.path.join(resources_dir, 'constraints.txt')
-    )
-    assert os.path.samefile(
-        dependency_constraints.get_for_python_version('3.6'),
-        os.path.join(resources_dir, 'constraints-python36.txt')
-    )
-    assert os.path.samefile(
-        dependency_constraints.get_for_python_version('3.5'),
-        os.path.join(resources_dir, 'constraints-python35.txt')
-    )
-    assert os.path.samefile(
-        dependency_constraints.get_for_python_version('2.7'),
-        os.path.join(resources_dir, 'constraints-python27.txt')
-    )
+    assert dependency_constraints.base_file_path.samefile(resources_dir / 'constraints.txt')
+    assert dependency_constraints.get_for_python_version('3.8').samefile(resources_dir / 'constraints.txt')
+    assert dependency_constraints.get_for_python_version('3.6').samefile(resources_dir / 'constraints-python36.txt')
+    assert dependency_constraints.get_for_python_version('3.5').samefile(resources_dir / 'constraints-python35.txt')
+    assert dependency_constraints.get_for_python_version('2.7').samefile(resources_dir / 'constraints-python27.txt')