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pack-refs: teach --exclude option to exclude refs from being packed

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At GitLab, we have a system that creates ephemeral internal refs that
don't live long before getting deleted. Having an option to exclude
certain refs from a packed-refs file allows these internal references to
be deleted much more efficiently.

Add an --exclude option to the pack-refs builtin, and use the ref
exclusions API to exclude certain refs from being packed into the final
packed-refs file

Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
John Cai
2023-05-12 21:34:41 +00:00
committed by Junio C Hamano
parent 283174b214
commit 826ae79fca
11 changed files with 69 additions and 20 deletions
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20
builtin/pack-refs.c
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@ -4,22 +4,34 @@
#include "parse-options.h"
#include "refs.h"
#include "repository.h"
#include "revision.h"
static char const * const pack_refs_usage[] = {
N_("git pack-refs [--all] [--no-prune]"),
N_("git pack-refs [--all] [--no-prune] [--exclude <pattern>]"),
NULL
};
int cmd_pack_refs(int argc, const char **argv, const char *prefix)
{
unsigned int flags = PACK_REFS_PRUNE;
static struct ref_exclusions excludes = REF_EXCLUSIONS_INIT;
struct pack_refs_opts pack_refs_opts = {.exclusions = &excludes, .flags = flags};
static struct string_list option_excluded_refs = STRING_LIST_INIT_NODUP;
struct string_list_item *item;
struct option opts[] = {
OPT_BIT(0, "all", &flags, N_("pack everything"), PACK_REFS_ALL),
OPT_BIT(0, "prune", &flags, N_("prune loose refs (default)"), PACK_REFS_PRUNE),
OPT_BIT(0, "all", &pack_refs_opts.flags, N_("pack everything"), PACK_REFS_ALL),
OPT_BIT(0, "prune", &pack_refs_opts.flags, N_("prune loose refs (default)"), PACK_REFS_PRUNE),
OPT_STRING_LIST(0, "exclude", &option_excluded_refs, N_("pattern"),
N_("references to exclude")),
OPT_END(),
};
git_config(git_default_config, NULL);
if (parse_options(argc, argv, prefix, opts, pack_refs_usage, 0))
usage_with_options(pack_refs_usage, opts);
return refs_pack_refs(get_main_ref_store(the_repository), flags);
for_each_string_list_item(item, &option_excluded_refs)
add_ref_exclusion(pack_refs_opts.exclusions, item->string);
return refs_pack_refs(get_main_ref_store(the_repository), &pack_refs_opts);
}