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2021-12-22refs: centralize initialization of the base ref_store.Libravatar Han-Wen Nienhuys1-1/+2
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-22refs: print error message in debug outputLibravatar Han-Wen Nienhuys1-1/+2
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-15Merge branch 'hn/reflog-tests'Libravatar Junio C Hamano1-2/+5
Prepare tests on ref API to help testing reftable backends. * hn/reflog-tests: refs/debug: trim trailing LF from reflog message test-ref-store: tweaks to for-each-reflog-ent format t1405: check for_each_reflog_ent_reverse() more thoroughly test-ref-store: don't add newline to reflog message show-branch: show reflog message
2021-12-02refs/debug: trim trailing LF from reflog messageLibravatar Han-Wen Nienhuys1-2/+5
On iteration, the reflog message is always terminated by a newline. Trim it to avoid clobbering the console with is this extra newline. Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-22refs: drop force_create argument of create_reflog APILibravatar Han-Wen Nienhuys1-3/+2
There is only one caller, builtin/checkout.c, and it hardcodes force_create=1. This argument was introduced in abd0cd3a301 (refs: new public ref function: safe_create_reflog, 2015-07-21), which promised to immediately use it in a follow-on commit, but that never happened. Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-10-03Merge branch 'hn/refs-errno-cleanup'Libravatar Junio C Hamano1-4/+3
Futz with the way 'errno' is relied on in the refs API to carry the failure modes up the call chain. * hn/refs-errno-cleanup: refs: make errno output explicit for read_raw_ref_fn refs/files-backend: stop setting errno from lock_ref_oid_basic refs: remove EINVAL errno output from specification of read_raw_ref_fn refs file backend: move raceproof_create_file() here
2021-10-03Merge branch 'ab/refs-files-cleanup'Libravatar Junio C Hamano1-4/+4
Continued work on top of the hn/refs-errno-cleanup topic. * ab/refs-files-cleanup: refs/files: remove unused "errno != ENOTDIR" condition refs/files: remove unused "errno == EISDIR" code refs/files: remove unused "oid" in lock_ref_oid_basic() refs API: remove OID argument to reflog_expire() reflog expire: don't lock reflogs using previously seen OID refs/files: add a comment about refs_reflog_exists() call refs: make repo_dwim_log() accept a NULL oid refs/debug: re-indent argument list for "prepare" refs/files: remove unused "skip" in lock_raw_ref() too refs/files: remove unused "extras/skip" in lock_ref_oid_basic() refs: drop unused "flags" parameter to lock_ref_oid_basic() refs/files: remove unused REF_DELETING in lock_ref_oid_basic() refs/packet: add missing BUG() invocations to reflog callbacks
2021-08-25refs: make errno output explicit for read_raw_ref_fnLibravatar Han-Wen Nienhuys1-4/+3
This makes it explicit how alternative ref backends should report errors in read_raw_ref_fn. read_raw_ref_fn needs to supply a credible errno for a number of cases. These are primarily: 1) The files backend calls read_raw_ref from lock_raw_ref, and uses the resulting error codes to create/remove directories as needed. 2) ENOENT should be translated in a zero OID, optionally with REF_ISBROKEN set, returning the last successfully resolved symref. This is necessary so read_raw_ref("HEAD") on an empty repo returns refs/heads/main (or the default branch du-jour), and we know on which branch to create the first commit. Make this information flow explicit by adding a failure_errno to the signature of read_raw_ref. All errnos from the files backend are still propagated unchanged, even though inspection suggests only ENOTDIR, EISDIR and ENOENT are relevant. Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-25refs API: remove OID argument to reflog_expire()Libravatar Ævar Arnfjörð Bjarmason1-2/+2
Since the the preceding commit the "oid" parameter to reflog_expire() is always NULL, but it was not cleaned up to reduce the size of the diff. Let's do that subsequent API and documentation cleanup now. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-25refs/debug: re-indent argument list for "prepare"Libravatar Ævar Arnfjörð Bjarmason1-2/+2
Re-indent this argument list that's been mis-indented since it was added in 34c319970d1 (refs/debug: trace into reflog expiry too, 2021-04-23). This makes a subsequent change smaller. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-07-19refs/debug: quote prefixLibravatar Han-Wen Nienhuys1-1/+2
This makes the empty prefix ("") stand out better. Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-05-10Merge branch 'bc/hash-transition-interop-part-1'Libravatar Junio C Hamano1-1/+1
SHA-256 transition. * bc/hash-transition-interop-part-1: hex: print objects using the hash algorithm member hex: default to the_hash_algo on zero algorithm value builtin/pack-objects: avoid using struct object_id for pack hash commit-graph: don't store file hashes as struct object_id builtin/show-index: set the algorithm for object IDs hash: provide per-algorithm null OIDs hash: set, copy, and use algo field in struct object_id builtin/pack-redundant: avoid casting buffers to struct object_id Use the final_oid_fn to finalize hashing of object IDs hash: add a function to finalize object IDs http-push: set algorithm when reading object ID Always use oidread to read into struct object_id hash: add an algo member to struct object_id
2021-05-07Merge branch 'hn/trace-reflog-expiry'Libravatar Junio C Hamano1-3/+44
The reflog expiry machinery has been taught to emit trace events. * hn/trace-reflog-expiry: refs/debug: trace into reflog expiry too
2021-04-27hash: provide per-algorithm null OIDsLibravatar brian m. carlson1-1/+1
Up until recently, object IDs did not have an algorithm member, only a hash. Consequently, it was possible to share one null (all-zeros) object ID among all hash algorithms. Now that we're going to be handling objects from multiple hash algorithms, it's important to make sure that all object IDs have a correct algorithm field. Introduce a per-algorithm null OID, and add it to struct hash_algo. Introduce a wrapper function as well, and use it everywhere we used to use the null_oid constant. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-27refs/debug: trace into reflog expiry tooLibravatar Han-Wen Nienhuys1-3/+44
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-12refs: print errno for read_raw_ref if GIT_TRACE_REFS is setLibravatar Han-Wen Nienhuys1-1/+4
The ref backend API uses errno as a sideband error channel. Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-09refs: add GIT_TRACE_REFS debugging mechanismLibravatar Han-Wen Nienhuys1-0/+398
When set in the environment, GIT_TRACE_REFS makes git print operations and results as they flow through the ref storage backend. This helps debug discrepancies between different ref backends. Example: $ GIT_TRACE_REFS="1" ./git branch 15:42:09.769631 refs/debug.c:26 ref_store for .git 15:42:09.769681 refs/debug.c:249 read_raw_ref: HEAD: 0000000000000000000000000000000000000000 (=> refs/heads/ref-debug) type 1: 0 15:42:09.769695 refs/debug.c:249 read_raw_ref: refs/heads/ref-debug: 3a238e539bcdfe3f9eb5010fd218640c1b499f7a (=> refs/heads/ref-debug) type 0: 0 15:42:09.770282 refs/debug.c:233 ref_iterator_begin: refs/heads/ (0x1) 15:42:09.770290 refs/debug.c:189 iterator_advance: refs/heads/b4 (0) 15:42:09.770295 refs/debug.c:189 iterator_advance: refs/heads/branch3 (0) Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>