Fix for StGIT

[David Howells]

Hi Catalin,

I think StGIT needs something like the attached patch to get it to generate
patches with renames in them correctly.  This isn't quite right, since it
doesn't pass the file list to git-diff-tree, but I can't work out how to make
the python do it:-/

David
---
diff -c /usr/lib/python2.5/site-packages/stgit/git.py.old /usr/lib/python2.5/site-packages/stgit/git.py
--- /usr/lib/python2.5/site-packages/stgit/git.py.old	2008-06-08 23:26:03.000000000 +0100
+++ /usr/lib/python2.5/site-packages/stgit/git.py	2009-04-10 00:17:58.000000000 +0100
@@ -820,8 +820,8 @@
 # usually invoke git.diff() form the calling functions
 def diffstat(files = None, rev1 = 'HEAD', rev2 = None):
     """Return the diffstat between rev1 and rev2."""
-    return GRun('apply', '--stat', '--summary'
-                ).raw_input(diff(files, rev1, rev2)).raw_output()
+    return GRun('diff-tree', '-M', '--stat', '--summary', rev1, rev2
+                ).raw_output()
 
 def files(rev1, rev2, diff_flags = []):
     """Return the files modified between rev1 and rev2
--
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