[PATCH 04/17] gc: use hook library for pre-auto-gc hook

[Emily Shaffer <emilyshaffer@google.com>]

Using the hook.h library instead of the run-command.h library to run
pre-auto-gc means that those hooks can be set up in config files, as
well as in the hookdir. pre-auto-gc is called only from builtin/gc.c.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
---
 Documentation/githooks.txt | 2 ++
 builtin/gc.c               | 4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/githooks.txt b/Documentation/githooks.txt
index f6ddf1aa22..d74308dc20 100644
--- a/Documentation/githooks.txt
+++ b/Documentation/githooks.txt
@@ -553,6 +553,8 @@ This hook is invoked by `git gc --auto` (see linkgit:git-gc[1]). It
 takes no parameter, and exiting with non-zero status from this script
 causes the `git gc --auto` to abort.
 
+Hooks run during 'pre-auto-gc' will be run in parallel by default.
+
 post-rewrite
 ~~~~~~~~~~~~
 
diff --git a/builtin/gc.c b/builtin/gc.c
index 3e8d76fd5a..b01b6eb5fd 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -32,6 +32,7 @@
 #include "remote.h"
 #include "object-store.h"
 #include "exec-cmd.h"
+#include "hook.h"
 
 #define FAILED_RUN "failed to run %s"
 
@@ -340,6 +341,7 @@ static void add_repack_incremental_option(void)
 
 static int need_to_gc(void)
 {
+	struct run_hooks_opt hook_opt = RUN_HOOKS_OPT_INIT_ASYNC;
 	/*
 	 * Setting gc.auto to 0 or negative can disable the
 	 * automatic gc.
@@ -386,7 +388,7 @@ static int need_to_gc(void)
 	else
 		return 0;
 
-	if (run_hook_le(NULL, "pre-auto-gc", NULL))
+	if (run_hooks("pre-auto-gc", &hook_opt))
 		return 0;
 	return 1;
 }
-- 
2.28.0.rc0.142.g3c755180ce-goog