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-rw-r--r--gbp/git.py9
1 files changed, 9 insertions, 0 deletions
diff --git a/gbp/git.py b/gbp/git.py
index fea10f9..5bd7fee 100644
--- a/gbp/git.py
+++ b/gbp/git.py
@@ -83,6 +83,15 @@ class GitRepository(object):
remote += merge.replace("refs/heads","", 1)
return remote
+ def is_fast_forward(self, from_branch, to_branch):
+ """check if an update from from_branch to to_branch would be a fast forward"""
+ out = self.__git_getoutput('rev-list', ["--left-right",
+ "%s...%s" % (from_branch, to_branch)])[0]
+ for line in out:
+ if line.startswith("<"):
+ return False
+ return True
+
def set_branch(self, branch):
"""switch to branch 'branch'"""
self.__check_path()