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Reset git_cache mirror when HEAD points to master

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master->main branch migration left the cache in some builders to have its HEAD still pointing to refs/heads/master. This causes bot_update to fail. If in this state, delete the cache and force bootstrap.

Bug: 1418866
Change-Id: Id716a013833d459ee37306d27b369099faf846ab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4310522
Commit-Queue: Aravind Vasudevan <aravindvasudev@google.com>
Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>
Reviewed-by: Fumitoshi Ukai <ukai@google.com>
This commit is contained in:
Aravind Vasudevan
2023-03-06 17:28:15 +00:00
committed by LUCI CQ
parent b4b22453f3
commit 6eccb0e24c
1 changed files with 23 additions and 0 deletions
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23
git_cache.py
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@@ -390,6 +390,29 @@ class Mirror(object):
self.print('%s has %d .pack files, re-bootstrapping if >%d or ==0' %
(self.mirror_path, len(pack_files), GC_AUTOPACKLIMIT))
# master->main branch migration left the cache in some builders to have its
# HEAD still pointing to refs/heads/master. This causes bot_update to fail.
# If in this state, delete the cache and force bootstrap.
try:
with open(os.path.join(self.mirror_path, 'HEAD')) as f:
head_ref = f.read()
except FileNotFoundError:
head_ref = ''
# Check only when HEAD points to master.
if 'master' in head_ref:
# Some repos could still have master so verify if the ref exists first.
show_ref_master_cmd = subprocess.run(
[Mirror.git_exe, 'show-ref', '--verify', 'refs/heads/master'],
cwd=self.mirror_path)
if show_ref_master_cmd.returncode != 0:
# Remove mirror
gclient_utils.rmtree(self.mirror_path)
# force bootstrap
force = True
should_bootstrap = (force or
not self.exists() or
len(pack_files) > GC_AUTOPACKLIMIT or