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Fix prune when bare git has detached head

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We don't really use HEAD much in the bare git repositories, but there
have been reports of errors in git-symbolic-ref:

  symbolic-ref: fatal: Refusing to point HEAD outside of refs/

That happen when the bare git repo is in the detached head state. It's
possible that previous operations were killed while we were pruning
branches.

Use DetachHead instead of SetHead if we're restoring the repo into a
detached head state.

Change-Id: I9062e8957bc70367d3ded399685ac026fbb421fc
This commit is contained in:
Dan Willemsen 2015-12-15 13:40:05 -08:00
parent e9becc079c
commit 1a799d14b7
1 changed files with 4 additions and 3 deletions
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7
project.py
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@ -1583,8 +1583,6 @@ class Project(object):
if kill:
old = self.bare_git.GetHead()
if old is None:
old = 'refs/heads/please_never_use_this_as_a_branch_name'
try:
self.bare_git.DetachHead(rev)
@ -1596,7 +1594,10 @@ class Project(object):
capture_stderr=True)
b.Wait()
finally:
self.bare_git.SetHead(old)
if ID_RE.match(old):
self.bare_git.DetachHead(old)
else:
self.bare_git.SetHead(old)
left = self._allrefs
for branch in kill: