project: allow CurrentBranch to return None on errors

If the repo client checkout is in an incomplete sync state, the work
git repo might be in a bad way.  Turn errors parsing HEAD into None
since callers of CurrentBranch already need to account for it.

Change-Id: Ia7682e29ef4182006b1fb5f5e57800f8ab67a9f4
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/239239
Reviewed-by: David Pursehouse <dpursehouse@collab.net>
Tested-by: Mike Frysinger <vapier@google.com>
This commit is contained in:
Mike Frysinger 2019-10-01 01:07:11 -04:00
parent 9775a3d5d2
commit c8290ad49e

View File

@ -866,10 +866,17 @@ class Project(object):
@property
def CurrentBranch(self):
"""Obtain the name of the currently checked out branch.
The branch name omits the 'refs/heads/' prefix.
None is returned if the project is on a detached HEAD.
The branch name omits the 'refs/heads/' prefix.
None is returned if the project is on a detached HEAD, or if the work_git is
otheriwse inaccessible (e.g. an incomplete sync).
"""
b = self.work_git.GetHead()
try:
b = self.work_git.GetHead()
except NoManifestException:
# If the local checkout is in a bad state, don't barf. Let the callers
# process this like the head is unreadable.
return None
if b.startswith(R_HEADS):
return b[len(R_HEADS):]
return None