+def findUpstreamBranchPoint():
+ settings = None
+ branchPoint = ""
+ parent = 0
+ while parent < 65535:
+ commit = "HEAD~%s" % parent
+ log = extractLogMessageFromGitCommit(commit)
+ settings = extractSettingsGitLog(log)
+ if not settings.has_key("depot-paths"):
+ parent = parent + 1
+ continue
+
+ names = read_pipe_lines("git name-rev '--refs=refs/remotes/p4/*' '%s'" % commit)
+ if len(names) <= 0:
+ continue
+
+ # strip away the beginning of 'HEAD~42 refs/remotes/p4/foo'
+ branchPoint = names[0].strip()[len(commit) + 1:]
+ break
+
+ return [branchPoint, settings]
+