add py3.5 netifaces

lib/python3.4/site-packages/pip/utils/__init__.py

@@ -276,22 +276,40 @@ def renames(old, new):
 
 def is_local(path):
     """
-    Return True if path is within sys.prefix, if we're running in a virtualenv.
+    Return True if this is a path pip is allowed to modify.
 
-    If we're not in a virtualenv, all paths are considered "local."
+    If we're in a virtualenv, sys.prefix points to the virtualenv's
+    prefix; only sys.prefix is considered local.
+
+    If we're not in a virtualenv, in general we can modify anything.
+    However, if the OS vendor has configured distutils to install
+    somewhere other than sys.prefix (which could be a subdirectory of
+    sys.prefix, e.g. /usr/local), we consider sys.prefix itself nonlocal
+    and the domain of the OS vendor. (In other words, everything _other
+    than_ sys.prefix is considered local.)
 
     """
-    if not running_under_virtualenv():
-        return True
-    return normalize_path(path).startswith(normalize_path(sys.prefix))
+
+    path = normalize_path(path)
+    prefix = normalize_path(sys.prefix)
+
+    if running_under_virtualenv():
+        return path.startswith(normalize_path(sys.prefix))
+    else:
+        from pip.locations import distutils_scheme
+        if path.startswith(prefix):
+            for local_path in distutils_scheme("").values():
+                if path.startswith(normalize_path(local_path)):
+                    return True
+            return False
+        else:
+            return True
 
 
 def dist_is_local(dist):
     """
-    Return True if given Distribution object is installed locally
-    (i.e. within current virtualenv).
-
-    Always True if we're not in a virtualenv.
+    Return True if given Distribution object is installed somewhere pip
+    is allowed to modify.
 
     """
     return is_local(dist_location(dist))