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always convert the chunks cache we find

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it seems it is possible that the chunks files are copied but *not*
converted. this may have happened here because the conversion was
interrupted, although the specific scenario is still unclear (but it
did happen during manual tests here). therefore reproducing this
problem seems to be difficult, hence the lack of tests for this
specific issue.

since we consider the header replacement code to be safe, that we
always convert shouldn't pose any additional threat to the existing
borg chunk cache.
This commit is contained in:
Antoine Beaupré 2015-10-15 18:42:20 -04:00
parent c4599d8ea4
commit fb68c6ff70
1 changed files with 9 additions and 10 deletions
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19
borg/upgrader.py
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@ -166,23 +166,23 @@ def copy_cache_file(path):
:params path: the basename of the cache file to copy
(example: "files" or "chunks") as a string
:returns: the borg file that was created or None if non
was created.
:returns: the borg file that was created or None if no
Attic cache file was found.
"""
attic_file = os.path.join(attic_cache_dir, path)
if os.path.exists(attic_file):
borg_file = os.path.join(borg_cache_dir, path)
if os.path.exists(borg_file):
logger.warning("borg cache file already exists in %s, skipping conversion of %s" % (borg_file, attic_file))
logger.warning("borg cache file already exists in %s, not copying from Attic" % (borg_file))
else:
logger.info("copying attic cache file from %s to %s" % (attic_file, borg_file))
if not dryrun:
shutil.copyfile(attic_file, borg_file)
return borg_file
return borg_file
else:
logger.warning("no %s cache file found in %s" % (path, attic_file))
return None
return None
# XXX: untested, because generating cache files is a PITA, see
# Archiver.do_create() for proof
@ -196,11 +196,10 @@ def copy_cache_file(path):
# we need to convert the headers of those files, copy first
for cache in ['chunks']:
copied = copy_cache_file(cache)
if copied:
logger.info("converting cache %s" % cache)
if not dryrun:
AtticRepositoryUpgrader.header_replace(cache, b'ATTICIDX', b'BORG_IDX')
cache = copy_cache_file(cache)
logger.info("converting cache %s" % cache)
if not dryrun:
AtticRepositoryUpgrader.header_replace(cache, b'ATTICIDX', b'BORG_IDX')
class AtticKeyfileKey(KeyfileKey):