BUG: include license file in the metadata directory

Signed-off-by: Filipe Laíns <lains@riseup.net>

mesonpy/__init__.py

@@ -361,6 +361,15 @@ def build(
             whl.writestr(f'{self.distinfo_dir}/METADATA', self._project.metadata)
             whl.writestr(f'{self.distinfo_dir}/WHEEL', self.wheel)
 
+            # add license (see https://github.com/FFY00/meson-python/issues/88)
+            if self._project._metadata:
+                license_ = self._project._metadata.license
+                if license_ and license_.file:
+                    whl.write(
+                        self._project._source_dir / license_.file,
+                        f'{self.distinfo_dir}/{os.path.basename(license_.file)}',
+                    )
+
             print('{light_blue}{bold}Copying files to wheel...{reset}'.format(**_STYLES))
             with mesonpy._util.cli_counter(
                 len(list(itertools.chain.from_iterable(wheel_files.values()))),

tests/packages/license-file/meson.build

@@ -0,0 +1,4 @@
+project(
+    'license-file',
+    version: '1.0.0',
+)

tests/packages/license-file/pyproject.toml

@@ -0,0 +1,8 @@
+[build-system]
+build-backend = 'mesonpy'
+requires = ['meson-python']
+
+[project]
+name = 'license-file'
+version = '1.0.0'
+license = { file = 'something/LICENSE.custom' }

tests/packages/license-file/something/LICENSE.custom

@@ -0,0 +1 @@
+Hello!

tests/test_wheel.py

@@ -119,3 +119,8 @@ def test_local_lib(virtual_env, wheel_link_against_local_lib):
     subprocess.check_output([
         virtual_env, '-c', 'import example; print(example.example_sum(1, 2))'
     ]).decode() == '3'
+
+
+def test_contents_license_file(wheel_license_file):
+    artifact = wheel.wheelfile.WheelFile(wheel_license_file)
+    assert artifact.read('license_file-1.0.0.dist-info/LICENSE.custom') == b'Hello!\n'