Added `metadata` section aliases.

setuptools/config.py

@@ -18,6 +18,12 @@ class ConfigHandler(object):
 
     """
 
+    aliases = {}
+    """Options aliases.
+    For compatibility with various packages. E.g.: d2to1 and pbr.
+
+    """
+
     strict_mode = True
     """Flag. Whether unknown options in config should
     raise DistutilsOptionError exception, or pass silently.
@@ -48,6 +54,9 @@ class ConfigHandler(object):
         unknown = tuple()
         target_obj = self.target_obj
 
+        # Translate alias into real name.
+        option_name = self.aliases.get(option_name, option_name)
+
         current_value = getattr(target_obj, option_name, unknown)
 
         if current_value is unknown:
@@ -216,9 +225,18 @@ class ConfigHandler(object):
 class ConfigMetadataHandler(ConfigHandler):
 
     section_prefix = 'metadata'
+
+    aliases = {
+        'author-email': 'author_email',
+        'home_page': 'url',
+        'summary': 'description',
+        'classifier': 'classifiers',
+        'platform': 'platforms',
+    }
+
     strict_mode = False
-    """We need to keep it loose, to be compatible with `pbr` package
-    which also uses `metadata` section.
+    """We need to keep it loose, to be partially compatible with
+    `pbr` and `d2to1` packages which also uses `metadata` section.
 
     """
 

setuptools/tests/test_config.py

@@ -86,6 +86,31 @@ class TestMetadata:
             assert metadata.name == 'fake_name'
             assert metadata.keywords == ['one', 'two']
 
+    def test_aliases(self, tmpdir):
+
+        fake_env(
+            tmpdir,
+            '[metadata]\n'
+            'author-email = test@test.com\n'
+            'home_page = http://test.test.com/test/\n'
+            'summary = Short summary\n'
+            'platform = a, b\n'
+            'classifier =\n'
+            '  Framework :: Django\n'
+            '  Programming Language :: Python :: 3.5\n'
+        )
+
+        with get_dist(tmpdir) as dist:
+            metadata = dist.metadata
+            assert metadata.author_email == 'test@test.com'
+            assert metadata.url == 'http://test.test.com/test/'
+            assert metadata.description == 'Short summary'
+            assert metadata.platforms == ['a', 'b']
+            assert metadata.classifiers == [
+                'Framework :: Django',
+                'Programming Language :: Python :: 3.5',
+            ]
+
     def test_multiline(self, tmpdir):
 
         fake_env(