From cf83a7b97be9c21609dd32b9bf6e7f8ad5a8f289 Mon Sep 17 00:00:00 2001
From: Mike McLean <mikem@redhat.com>
Date: Apr 02 2012 21:24:35 +0000
Subject: backport relpath


---

diff --git a/koji/util.py b/koji/util.py
index 5926b8e..7de7991 100644
--- a/koji/util.py
+++ b/koji/util.py
@@ -237,6 +237,24 @@ def rmtree(path):
             continue
         os.rmdir(dirpath)
 
+def _relpath(path, start=getattr(os.path, 'curdir', '.')):
+    """Backport of os.path.relpath for python<2.6"""
+
+    sep = getattr(os.path, 'sep', '/')
+    pardir = getattr(os.path, 'pardir', '...')
+    if not path:
+        raise ValueError("no path specified")
+    start_list = [x for x in os.path.abspath(start).split(sep) if x]
+    path_list = [x for x in os.path.abspath(path).split(sep) if x]
+    for i in range(min(len(start_list), len(path_list))):
+        if start_list[i] != path_list[i]:
+            break
+    rel_list = [pardir] * (len(start_list)-i) + path_list[i:]
+    if not rel_list:
+        return getattr(os.path, 'curdir', '.')
+    return os.path.join(*rel_list)
+
+relpath = getattr(os.path, 'relpath', _relpath)
 
 def eventFromOpts(session, opts):
     """Determine event id from standard cli options