Support parsing git mbox patches without a version tail, as generated by Mercurial.

NEWS

@@ -11,6 +11,9 @@
   * Correct short-circuiting operation for no-op fetches in the server.
     (Dave Borowitz)
 
+  * Support parsing git mbox patches without a version tail, as generated by Mercurial. 
+    (Jelmer Vernooij)
+
 0.6.2	2010-10-16
 
  BUG FIXES

dulwich/patch.py

@@ -179,5 +179,8 @@ def git_am_patch_split(f):
         if l == "-- \n":
             break
         diff += l
-    version = f.next().rstrip("\n")
+    try:
+        version = f.next().rstrip("\n")
+    except StopIteration:
+        version = None
     return c, diff, version

dulwich/tests/test_patch.py

@@ -135,3 +135,21 @@ From: Jelmer Vernooy <jelmer@debian.org>
         c, diff, version = git_am_patch_split(StringIO(text))
         self.assertEquals("Jelmer Vernooy <jelmer@debian.org>", c.author)
         self.assertEquals('Added unit tests for dulwich.object_store.tree_lookup_path.\n\n* dulwich/tests/test_object_store.py\n  (TreeLookupPathTests): This test case contains a few tests that ensure the\n   tree_lookup_path function works as expected.\n', c.message)
+
+    def test_extract_no_version_tail(self):
+        text = """From ff643aae102d8870cac88e8f007e70f58f3a7363 Mon Sep 17 00:00:00 2001
+From: Jelmer Vernooij <jelmer@samba.org>
+Date: Thu, 15 Apr 2010 15:40:28 +0200
+Subject:  [Dulwich-users] [PATCH] Added unit tests for
+ dulwich.object_store.tree_lookup_path.
+
+From: Jelmer Vernooy <jelmer@debian.org>
+
+---
+ pixmaps/prey.ico |  Bin 9662 -> 9662 bytes
+ 1 files changed, 0 insertions(+), 0 deletions(-)
+ mode change 100755 => 100644 pixmaps/prey.ico
+
+"""
+        c, diff, version = git_am_patch_split(StringIO(text))
+        self.assertIs(None, version)