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builtin/pack-refs: introduce new "--auto" flag

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Calling git-pack-refs(1) will unconditionally cause it to pack all
requested refs regardless of the current state of the ref database. For
example:

  - With the "files" backend we will end up rewriting the complete
    "packed-refs" file even if only a single ref would require
    compaction.

  - With the "reftable" backend we will end up always compacting all
    tables into a single table.

This behaviour can be completely unnecessary depending on the backend
and is thus wasteful.

With the introduction of the `PACK_REFS_AUTO` flag in the preceding
commit we can improve this and let the backends decide for themselves
whether to pack refs in the first place. Expose this functionality via a
new "--auto" flag in git-pack-refs(1), which mirrors the same flag in
both git-gc(1) and git-maintenance(1).

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt
2024-03-25 11:03:20 +01:00
committed by Junio C Hamano
parent a75dc71f37
commit 6dcffc68f4
4 changed files with 57 additions and 2 deletions
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3
builtin/pack-refs.c
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@ -7,7 +7,7 @@
#include "revision.h"
static char const * const pack_refs_usage[] = {
N_("git pack-refs [--all] [--no-prune] [--include <pattern>] [--exclude <pattern>]"),
N_("git pack-refs [--all] [--no-prune] [--auto] [--include <pattern>] [--exclude <pattern>]"),
NULL
};
@ -28,6 +28,7 @@ int cmd_pack_refs(int argc, const char **argv, const char *prefix)
struct option opts[] = {
OPT_BOOL(0, "all", &pack_all, N_("pack everything")),
OPT_BIT(0, "prune", &pack_refs_opts.flags, N_("prune loose refs (default)"), PACK_REFS_PRUNE),
OPT_BIT(0, "auto", &pack_refs_opts.flags, N_("auto-pack refs as needed"), PACK_REFS_AUTO),
OPT_STRING_LIST(0, "include", pack_refs_opts.includes, N_("pattern"),
N_("references to include")),
OPT_STRING_LIST(0, "exclude", &option_excluded_refs, N_("pattern"),