Backed out changeset 6e045b2724d0 and 56d7ea3d42b2. Ref #307.

pkg_resources/__init__.py

@@ -2267,8 +2267,8 @@ OBRACKET = re.compile(r"\s*\[").match
 CBRACKET = re.compile(r"\s*\]").match
 MODULE = re.compile(r"\w+(\.\w+)*$").match
 EGG_NAME = re.compile(
-    r"(?P<name>.*?)"
-    r"( -(?P<ver>[^-]+) (-py(?P<pyver>[^-]+) (-(?P<plat>.+))? )? )?$",
+    r"(?P<name>[^-]+)"
+    r"( -(?P<ver>[^-]+) (-py(?P<pyver>[^-]+) (-(?P<plat>.+))? )? )?",
     re.VERBOSE | re.IGNORECASE
 ).match
 

pkg_resources/tests/test_resources.py

@@ -207,16 +207,6 @@ class TestDistro:
         with pytest.raises(pkg_resources.UnknownExtra):
             d.requires(["foo"])
 
-    def test_pkg_name_with_hyphen(self):
-        "Package names with hyphens are supported"
-        name = 'setuptools-markdown-1.0.egg'
-        dist = Distribution.from_filename(name)
-        assert dist.project_name == "setuptools-markdown"
-        assert dist.key == "setuptools-markdown"
-        assert dist.version == "1.0"
-        assert dist.py_version is None
-        assert dist.platform is None
-
 
 class TestWorkingSet:
     def test_find_conflicting(self):