Update test_egg_fragment to include a name with a dash in it. Expand on interpret_distro_name to be a tiny bit smarter about inferring the pivot separating name and version.

2 files changed, 9 insertions, 2 deletions

diff --git a/setuptools/package_index.py b/setuptools/package_index.py
index 1300b406..bef2ef81 100644
--- a/setuptools/package_index.py
+++ b/setuptools/package_index.py
@@ -165,7 +165,14 @@ def interpret_distro_name(
         # it is a bdist_dumb, not an sdist -- bail out
         return
 
-    p = len(parts) - 1
+    # find the pivot (p) that splits the name from the version.
+    # infer the version as the first item that has a digit.
+    for p in range(len(parts)):
+        if parts[p][:1].isdigit():
+            break
+    else:
+        p = len(parts)
+
     yield Distribution(
         location, metadata, '-'.join(parts[:p]), '-'.join(parts[p:]),
         py_version=py_version, precedence=precedence,
diff --git a/setuptools/tests/test_packageindex.py b/setuptools/tests/test_packageindex.py
index 8e9435ef..5f09e1bd 100644
--- a/setuptools/tests/test_packageindex.py
+++ b/setuptools/tests/test_packageindex.py
@@ -189,7 +189,7 @@ class TestPackageIndex:
             for locs in local]
         for v, vc in versions:
             dists = list(setuptools.package_index.distros_for_url(
-                'http://example.com/example.zip#egg=example-' + v))
+                'http://example.com/example-foo.zip#egg=example-foo-' + v))
             assert dists[0].version == ''
             assert dists[1].version == vc