call chmod() for directory too and ignore symlinks.

src/zc/buildout/easy_install.py

@@ -2080,20 +2080,23 @@ def _final_version(parsed_version):
             return False
     return True
 
-def chmod(filepath):
+def chmod(path):
+    if os.path.islink(path):
+        return
     # give the same permission but write as owner to group and other.
-    current_perm = os.stat(filepath).st_mode & \
+    current_perm = os.stat(path).st_mode & \
         (stat.S_IRWXU + stat.S_IRWXG + stat.S_IRWXO)
     owner_perm = current_perm & stat.S_IRWXU
     new_perm = (owner_perm + owner_perm / 0o010 + owner_perm / 0o100) & \
         (~ 0o022)
     if new_perm != current_perm:
-        os.chmod(filepath, new_perm)
+        os.chmod(path, new_perm)
 
 def redo_pyc(egg):
     if not os.path.isdir(egg):
         return
     for dirpath, dirnames, filenames in os.walk(egg):
+        chmod(dirpath)
         for filename in filenames:
             filepath = os.path.join(dirpath, filename)
             chmod(filepath)