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4 commits

Author SHA1 Message Date
Junio C Hamano a850356d1b Merge branch 'hn/trace-reflog-expiry' 
The reflog expiry machinery has been taught to emit trace events.

* hn/trace-reflog-expiry:
  refs/debug: trace into reflog expiry too
 2021-05-07 12:47:38 +09:00
Han-Wen Nienhuys 34c319970d refs/debug: trace into reflog expiry too 
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
 2021-04-27 15:59:39 +09:00
Han-Wen Nienhuys 2a2112a429 refs: print errno for read_raw_ref if GIT_TRACE_REFS is set 
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>
 2021-04-12 14:42:37 -07:00
Han-Wen Nienhuys 4441f42707 refs: add GIT_TRACE_REFS debugging mechanism 
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: 3a238e539b (=> 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>
 2020-09-09 12:58:37 -07:00