Merge pull request #629 from kata198/master

Fix issues with distribution location from eggs

pkg_resources/__init__.py

@@ -1983,12 +1983,20 @@ def find_on_path(importer, path_item, only=False):
             )
         else:
             # scan for .egg and .egg-info in directory
-            for entry in os.listdir(path_item):
+
+            path_item_entries = os.listdir(path_item)
+            # Reverse so we find the newest version of a distribution,
+            path_item_entries.sort()
+            path_item_entries.reverse()
+            for entry in path_item_entries:
                 lower = entry.lower()
                 if lower.endswith('.egg-info') or lower.endswith('.dist-info'):
                     fullpath = os.path.join(path_item, entry)
                     if os.path.isdir(fullpath):
                         # egg-info directory, allow getting metadata
+                        if len(os.listdir(fullpath)) == 0:
+                            # Empty egg directory, skip.
+                            continue
                         metadata = PathMetadata(path_item, fullpath)
                     else:
                         metadata = FileMetadata(fullpath)