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2026-04-02reftable/fsck: use REFTABLE_UNUSED instead of UNUSEDPatrick Steinhardt1-1/+1
While we have the reftable-specific `REFTABLE_UNUSED` header, we accidentally introduced a new usage of the Git-specific `UNUSED` header into the reftable library in 9051638519 (reftable: add code to facilitate consistency checks, 2025-10-07). Convert the site to use `REFTABLE_UNUSED`. Ideally, we'd move the definition of `UNUSED` into "git-compat-util.h" so that it becomes in accessible to the reftable library. But this is unfortunately not easily possible as "compat/mingw-posix.h" requires this macro, and this header is included by "compat/posix.h". Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-10-07reftable: add code to facilitate consistency checksKarthik Nayak1-0/+100
The `git refs verify` command is used to run consistency checks on the reference backends. This command is also invoked when users run 'git fsck'. While the files-backend has some fsck checks added, the reftable backend lacks such checks. Let's add the required infrastructure and a check to test for the files present in the reftable directory. Since the reftable library is treated as an independent library we should ensure that the library code works independently without knowledge about Git's internals. To do this, add both 'reftable/fsck.c' and 'reftable/reftable-fsck.h'. Which provide an entry point 'reftable_fsck_check' for running fsck checks over a provided reftable stack. The callee provides the function with callbacks to handle issue and information reporting. The added check, goes over all tables in the reftable stack validates that they have a valid name. It not, it raises an error. While here, move 'reftable/error.o' in the Makefile to retain lexicographic ordering. Signed-off-by: Karthik Nayak <karthik.188@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>