Helper function to check the existance of a revision

Signed-off-by: Simon Hausmann <simon@lst.de>

diff --git a/contrib/fast-import/git-p4 b/contrib/fast-import/git-p4
index 6ead1c41732743cabdd3741bf5da66c1a44b134e..b21dee31997e96f1a6f5e141db007fe2f1838ae9 100755 (executable)
--- a/contrib/fast-import/git-p4
+++ b/contrib/fast-import/git-p4
@@ -83,6 +83,9 @@ def extractDepotPathAndChangeFromGitLog(log):
 
     return values.get("depot-path"), values.get("change")
 
+def gitBranchExists(branch):
+    return os.system("git-rev-parse %s 2>/dev/null >/dev/null") == 0
+
 class Command:
     def __init__(self):
         self.usage = "usage: %prog [options]"