borg1 needed this due to its transactional / rollback behaviour:
if there was uncommitted stuff in the repo, next repo opening automatically
rolled back to last commit. thus we needed checkpoint archives to reference
chunks and commit the repo.
borg2 does not do that anymore, unused chunks are only removed when the
user invokes borg compact.
thus, if a borg create gets interrupted, the user can just run borg create
again and it will find some chunks are already in the repo, making progress
even if borg create gets frequently interrupted.
Note: this is the default cache implementation in borg 1.x,
it worked well, but there were some issues:
- if the local chunks cache got out of sync with the repository,
it needed an expensive rebuild from the infos in all archives.
- to optimize that, a local chunks.archive.d cache was used to
speed that up, but at the price of quite significant space needs.
AdhocCacheWithFiles replaced this with a non-persistent chunks cache,
requesting all chunkids from the repository to initialize a simplified
non-persistent chunks index, that does not do real refcounting and also
initially does not have size information for pre-existing chunks.
We want to move away from precise refcounting, LocalCache needs to die.
Also: support a "cli" env var value, that does not determine
the implementation from the env var, but rather from cli options (similar to as it was before adding BORG_CACHE_IMPL).
- macOS: run on macos-14 (on Apple Silicon!)
- macOS: use OpenSSL 3.0 from brew
- macOS: run with Python 3.11
- pip install -e .: add -v
- use up-to-date github actions
- remove libb2 references - since borg 1.2, we use blake2 indirectly via python stdlib
borg init calls this. If there is a PermissionError, it is
usually fs permission issue at path or its parent directory.
Don't give a traceback, but rather an error msg and a specific exit code.
- implement updating exit code based on severity, including modern codes
- extend print_warning with kwargs wc (warning code) and wt (warning type)
- update a global warnings_list with warning_info elements
- create a class hierarchy below BorgWarning class similar to Error class
- diff: change harmless warnings about speed to rc == 0
- delete --force --force: change harmless warnings to rc == 0
Also:
- have BackupRaceConditionError as a more precise subclass of BackupError
