[PATCH 15/17] post-update: use hook.h library

[Emily Shaffer <emilyshaffer@google.com>]

By using run_hooks() instead of run_hook_le(), 'post-update' hooks can
be specified in the config as well as the hookdir.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
---
 Documentation/githooks.txt |  2 ++
 builtin/receive-pack.c     | 26 +++++++-------------------
 2 files changed, 9 insertions(+), 19 deletions(-)

diff --git a/Documentation/githooks.txt b/Documentation/githooks.txt
index 2c59c537f9..1412cd5846 100644
--- a/Documentation/githooks.txt
+++ b/Documentation/githooks.txt
@@ -498,6 +498,8 @@ Both standard output and standard error output are forwarded to
 `git send-pack` on the other end, so you can simply `echo` messages
 for the user.
 
+Hooks run during 'post-update' will be run in parallel by default.
+
 reference-transaction
 ~~~~~~~~~~~~~~~~~~~~~
 
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index b929a3505c..66af00fd8c 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -1678,33 +1678,21 @@ static const char *update(struct command *cmd, struct shallow_info *si)
 static void run_update_post_hook(struct command *commands)
 {
 	struct command *cmd;
-	struct child_process proc = CHILD_PROCESS_INIT;
-	const char *hook;
-
-	hook = find_hook("post-update");
-	if (!hook)
-		return;
+	struct run_hooks_opt opt = RUN_HOOKS_OPT_INIT_ASYNC;
 
 	for (cmd = commands; cmd; cmd = cmd->next) {
 		if (cmd->error_string || cmd->did_not_exist)
 			continue;
-		if (!proc.args.nr)
-			strvec_push(&proc.args, hook);
-		strvec_push(&proc.args, cmd->ref_name);
+		strvec_push(&opt.args, cmd->ref_name);
 	}
-	if (!proc.args.nr)
+	if (!opt.args.nr)
 		return;
 
-	proc.no_stdin = 1;
-	proc.stdout_to_stderr = 1;
-	proc.err = use_sideband ? -1 : 0;
-	proc.trace2_hook_name = "post-update";
+	if (use_sideband)
+		opt.consume_sideband = hook_output_to_sideband;
 
-	if (!start_command(&proc)) {
-		if (use_sideband)
-			copy_to_sideband(proc.err, -1, NULL);
-		finish_command(&proc);
-	}
+	run_hooks("post-update", &opt);
+	run_hooks_opt_clear(&opt);
 }
 
 static void check_aliased_update_internal(struct command *cmd,
-- 
2.28.0.rc0.142.g3c755180ce-goog