setup: Add tests for the installed files list

Ensure that the installed files list matches what we expect, to avoid
surprises at release time.

run_meson_command_tests.py

@@ -131,8 +131,22 @@ class CommandTests(unittest.TestCase):
         os.environ['PYTHONPATH'] = str(pylibdir)
         os.environ['PATH'] = str(bindir) + os.pathsep + os.environ['PATH']
         self._run(python_command + ['setup.py', 'install', '--prefix', str(prefix)])
-        self.assertTrue(pylibdir.is_dir())
+        # Check that all the files were installed correctly
         self.assertTrue(bindir.is_dir())
+        self.assertTrue(pylibdir.is_dir())
+        from setup import packages
+        # Extract list of expected python module files
+        expect = set()
+        for pkg in packages:
+            expect.update([p.as_posix() for p in Path(pkg.replace('.', '/')).glob('*.py')])
+        # Check what was installed, only count files that are inside 'mesonbuild'
+        have = set()
+        for p in Path(pylibdir).glob('**/*.py'):
+            s = p.as_posix()
+            if 'mesonbuild' not in s:
+                continue
+            have.add(s[s.rfind('mesonbuild'):])
+        self.assertEqual(have, expect)
         # Run `meson`
         os.chdir('/')
         resolved_meson_command = [str(bindir / 'meson')]

setup.py

@@ -28,7 +28,20 @@ from setuptools import setup
 # On windows, will create Scripts/meson.exe and Scripts/meson-script.py
 # Other platforms will create bin/meson
 entries = {'console_scripts': ['meson=mesonbuild.mesonmain:main']}
+packages = ['mesonbuild',
+            'mesonbuild.backend',
+            'mesonbuild.compilers',
+            'mesonbuild.dependencies',
+            'mesonbuild.modules',
+            'mesonbuild.scripts',
+            'mesonbuild.wrap']
+data_files = []
+if sys.platform != 'win32':
+    # Only useful on UNIX-like systems
+    data_files = [('share/man/man1', ['man/meson.1']),
+                  ('share/polkit-1/actions', ['data/com.mesonbuild.install.policy'])]
 
+if __name__ == '__main__':
     setup(name='meson',
           version=version,
           description='A high performance build system',
@@ -37,16 +50,9 @@ setup(name='meson',
           url='http://mesonbuild.com',
           license=' Apache License, Version 2.0',
           python_requires='>=3.5',
-      packages=['mesonbuild',
-                'mesonbuild.backend',
-                'mesonbuild.compilers',
-                'mesonbuild.dependencies',
-                'mesonbuild.modules',
-                'mesonbuild.scripts',
-                'mesonbuild.wrap'],
+          packages=packages,
           entry_points=entries,
-      data_files=[('share/man/man1', ['man/meson.1']),
-                  ('share/polkit-1/actions', ['data/com.mesonbuild.install.policy'])],
+          data_files=data_files,
           classifiers=['Development Status :: 5 - Production/Stable',
                        'Environment :: Console',
                        'Intended Audience :: Developers',