[PATCH 11/17] transport: convert pre-push hook to use config

[Emily Shaffer <emilyshaffer@google.com>]

By using the hook.h:run_hooks API, pre-push hooks can be specified in
the config as well as in the hookdir.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
---
 Documentation/githooks.txt |  2 ++
 transport.c                | 55 +++++++++-----------------------------
 2 files changed, 14 insertions(+), 43 deletions(-)

diff --git a/Documentation/githooks.txt b/Documentation/githooks.txt
index db290984f6..8f5524055b 100644
--- a/Documentation/githooks.txt
+++ b/Documentation/githooks.txt
@@ -271,6 +271,8 @@ If this hook exits with a non-zero status, `git push` will abort without
 pushing anything.  Information about why the push is rejected may be sent
 to the user by writing to standard error.
 
+Hooks executed during 'pre-push' will run in parallel by default.
+
 [[pre-receive]]
 pre-receive
 ~~~~~~~~~~~
diff --git a/transport.c b/transport.c
index 47da955e4f..6c67bc0fea 100644
--- a/transport.c
+++ b/transport.c
@@ -22,6 +22,7 @@
 #include "protocol.h"
 #include "object-store.h"
 #include "color.h"
+#include "hook.h"
 
 static int transport_use_color = -1;
 static char transport_colors[][COLOR_MAXLEN] = {
@@ -1162,31 +1163,13 @@ static void die_with_unpushed_submodules(struct string_list *needs_pushing)
 static int run_pre_push_hook(struct transport *transport,
 			     struct ref *remote_refs)
 {
-	int ret = 0, x;
+	int ret = 0;
+	struct run_hooks_opt opt = RUN_HOOKS_OPT_INIT_ASYNC;
+	struct strbuf tmp = STRBUF_INIT;
 	struct ref *r;
-	struct child_process proc = CHILD_PROCESS_INIT;
-	struct strbuf buf;
-	const char *argv[4];
-
-	if (!(argv[0] = find_hook("pre-push")))
-		return 0;
-
-	argv[1] = transport->remote->name;
-	argv[2] = transport->url;
-	argv[3] = NULL;
-
-	proc.argv = argv;
-	proc.in = -1;
-	proc.trace2_hook_name = "pre-push";
-
-	if (start_command(&proc)) {
-		finish_command(&proc);
-		return -1;
-	}
 
-	sigchain_push(SIGPIPE, SIG_IGN);
-
-	strbuf_init(&buf, 256);
+	strvec_push(&opt.args, transport->remote->name);
+	strvec_push(&opt.args, transport->url);
 
 	for (r = remote_refs; r; r = r->next) {
 		if (!r->peer_ref) continue;
@@ -1195,30 +1178,16 @@ static int run_pre_push_hook(struct transport *transport,
 		if (r->status == REF_STATUS_REJECT_REMOTE_UPDATED) continue;
 		if (r->status == REF_STATUS_UPTODATE) continue;
 
-		strbuf_reset(&buf);
-		strbuf_addf( &buf, "%s %s %s %s\n",
+		strbuf_reset(&tmp);
+		strbuf_addf(&tmp, "%s %s %s %s",
 			 r->peer_ref->name, oid_to_hex(&r->new_oid),
 			 r->name, oid_to_hex(&r->old_oid));
-
-		if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
-			/* We do not mind if a hook does not read all refs. */
-			if (errno != EPIPE)
-				ret = -1;
-			break;
-		}
+		string_list_append(&opt.str_stdin, tmp.buf);
 	}
 
-	strbuf_release(&buf);
-
-	x = close(proc.in);
-	if (!ret)
-		ret = x;
-
-	sigchain_pop(SIGPIPE);
-
-	x = finish_command(&proc);
-	if (!ret)
-		ret = x;
+	ret = run_hooks("pre-push", &opt);
+	run_hooks_opt_clear(&opt);
+	strbuf_release(&tmp);
 
 	return ret;
 }
-- 
2.28.0.rc0.142.g3c755180ce-goog