Merge early parts of jk/cached-textconv

diff --git a/contrib/fast-import/import-zips.py b/contrib/fast-import/import-zips.py
index c674fa2d1b5c6ab47ebb5e828c427c6d47bb50fc..82f5ed3ddc8adb1b9b281c3912f4e67c53ef152f 100755 (executable)
--- a/contrib/fast-import/import-zips.py
+++ b/contrib/fast-import/import-zips.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 ## zip archive frontend for git-fast-import
 ##
@@ -44,7 +44,8 @@ def printlines(list):
                        common_prefix = name[:name.rfind('/') + 1]
                else:
                        while not name.startswith(common_prefix):
-                               common_prefix = name[:name.rfind('/') + 1]
+                               last_slash = common_prefix[:-1].rfind('/') + 1
+                               common_prefix = common_prefix[:last_slash]
 
                mark[name] = ':' + str(next_mark)
                next_mark += 1