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hook: allow out-of-repo 'git hook' invocations

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Since hooks can now be supplied via the config, and a config can be
present without a gitdir via the global and system configs, we can start
to allow 'git hook run' to occur without a gitdir. This enables us to do
things like run sendemail-validate hooks when running 'git send-email'
from a nongit directory.

It still doesn't make sense to look for hooks in the hookdir in nongit
repos, though, as there is no hookdir.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Emily Shaffer
2026-02-19 00:23:51 +02:00
committed by Junio C Hamano
parent d084fa2a91
commit b51e238ddf
3 changed files with 40 additions and 8 deletions
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30
hook.c
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@@ -18,6 +18,9 @@ const char *find_hook(struct repository *r, const char *name)
int found_hook;
if (!r || !r->gitdir)
return NULL;
repo_git_path_replace(r, &path, "hooks/%s", name);
found_hook = access(path.buf, X_OK) >= 0;
#ifdef STRIP_EXTENSION
@@ -268,12 +271,18 @@ static void build_hook_config_map(struct repository *r, struct strmap *cache)
strmap_clear(&cb_data.event_hooks, 0);
}
/* Return the hook config map for `r`, populating it first if needed. */
/*
* Return the hook config map for `r`, populating it first if needed.
*
* Out-of-repo calls (r->gitdir == NULL) allocate and return a temporary
* cache map; the caller is responsible for freeing it with
* hook_cache_clear() + free().
*/
static struct strmap *get_hook_config_cache(struct repository *r)
{
struct strmap *cache = NULL;
if (r) {
if (r && r->gitdir) {
/*
* For in-repo calls, the map is stored in r->hook_config_cache,
* so repeated invocations don't parse the configs, so allocate
@@ -285,6 +294,14 @@ static struct strmap *get_hook_config_cache(struct repository *r)
build_hook_config_map(r, r->hook_config_cache);
}
cache = r->hook_config_cache;
} else {
/*
* Out-of-repo calls (no gitdir) allocate and return a temporary
* map cache which gets free'd immediately by the caller.
*/
cache = xcalloc(1, sizeof(*cache));
strmap_init(cache);
build_hook_config_map(r, cache);
}
return cache;
@@ -315,6 +332,15 @@ static void list_hooks_add_configured(struct repository *r,
string_list_append(list, friendly_name)->util = hook;
}
/*
* Cleanup temporary cache for out-of-repo calls since they can't be
* stored persistently. Next out-of-repo calls will have to re-parse.
*/
if (!r || !r->gitdir) {
hook_cache_clear(cache);
free(cache);
}
}
struct string_list *list_hooks(struct repository *r, const char *hookname,