git/refs
shejialuo e1c9548eae packed-backend: check whether the "packed-refs" is sorted
When there is a "sorted" trait in the header of the "packed-refs" file,
it means that each entry is sorted increasingly by comparing the
refname. We should add checks to verify whether the "packed-refs" is
sorted in this case.

Update the "packed_fsck_ref_header" to know whether there is a "sorted"
trail in the header. It may seem that we could record all refnames
during the parsing process and then compare later. However, this is not
a good design due to the following reasons:

1. Because we need to store the state across the whole checking
   lifetime, we would consume a lot of memory if there are many entries
   in the "packed-refs" file.
2. We cannot reuse the existing compare function "cmp_packed_ref_records"
   which cause repetition.

Because "cmp_packed_ref_records" needs an extra parameter "struct
snaphost", extract the common part into a new function
"cmp_packed_ref_records" to reuse this function to compare.

Then, create a new function "packed_fsck_ref_sorted" to parse the file
again and user the new fsck message "packedRefUnsorted(ERROR)" to report
to the user if the file is not sorted.

Mentored-by: Patrick Steinhardt <ps@pks.im>
Mentored-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: shejialuo <shejialuo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-02-27 14:03:09 -08:00
..
debug.c global: trivial conversions to fix `-Wsign-compare` warnings 2024-12-06 20:20:04 +09:00
files-backend.c Merge branch 'kn/reflog-migration' 2024-12-23 09:32:29 -08:00
iterator.c global: mark code units that generate warnings with `-Wsign-compare` 2024-12-06 20:20:02 +09:00
packed-backend.c packed-backend: check whether the "packed-refs" is sorted 2025-02-27 14:03:09 -08:00
packed-backend.h refs/files: use heuristic to decide whether to repack with `--auto` 2024-09-04 08:03:24 -07:00
ref-cache.c ref-cache: fix invalid free operation in `free_ref_entry` 2024-11-27 04:34:37 +09:00
ref-cache.h refs: keep track of unresolved reference value in iterators 2024-08-09 08:47:33 -07:00
refs-internal.h Merge branch 'kn/reflog-migration' 2024-12-23 09:32:29 -08:00
reftable-backend.c Merge branch 'kn/reflog-migration' 2024-12-23 09:32:29 -08:00