[PATCH] git p4: Use git diff-tree instead of format-patch

[Crestez Dan Leonard <cdleonard@gmail.com>]

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The output of git format-patch can vary with user preferences. In
particular setting diff.noprefix will break the "git apply" that
is done as part of "git p4 submit".

Signed-off-by: Crestez Dan Leonard <cdleonard@gmail.com>
---
  git-p4.py | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)



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diff --git a/git-p4.py b/git-p4.py
index 31e71ff..fe988ce 100755
--- a/git-p4.py
+++ b/git-p4.py
@@ -1308,7 +1308,7 @@ class P4Submit(Command, P4UserMap):
             else:
                 die("unknown modifier %s for %s" % (modifier, path))
 
-        diffcmd = "git format-patch -k --stdout \"%s^\"..\"%s\"" % (id, id)
+        diffcmd = "git diff-tree -p \"%s\"" % (id)
         patchcmd = diffcmd + " | git apply "
         tryPatchCmd = patchcmd + "--check -"
         applyPatchCmd = patchcmd + "--check --apply -"