Add version guessing funtion to gitdir and cached repo.

Change-Id: I1c79ce68a7a7534d36a9e83210e18a58e7b648e8

1 files changed, 6 insertions, 0 deletions

diff --git a/morphlib/gitdir.py b/morphlib/gitdir.py
index 1c286720..9ec38865 100644
--- a/morphlib/gitdir.py
+++ b/morphlib/gitdir.py
@@ -707,6 +707,12 @@ class GitDirectory(object):
         args = ['branch', '--contains', ref]
         return self._gitcmd_output_list(*args)
 
+    def version_guess(self, ref):
+        self._check_ref_exists(ref)
+
+        args = ['describe', '--tags', '--always', ref]
+        return morphlib.git.gitcmd(self._runcmd, *args).strip()
+
     def _update_ref(self, ref_args, message):
         args = ['update-ref']
         # No test coverage, since while this functionality is useful,