[PATCH 12/17] reference-transaction: look for hooks in config

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By using the hook.h library, reference-transaction hooks can be
specified in the config instead.

The expected output of the test is not fully updated to reflect the
absolute path of the hook called because the 'update' hook has not yet
been converted to use hook.h.

Signed-off-by: Emily Shaffer <emilyshaffer@xxxxxxxxxx>
---
 Documentation/githooks.txt       |  2 ++
 refs.c                           | 33 +++++++-------------------------
 t/t1416-ref-transaction-hooks.sh |  8 ++++----
 3 files changed, 13 insertions(+), 30 deletions(-)

diff --git a/Documentation/githooks.txt b/Documentation/githooks.txt
index 8f5524055b..3a35500132 100644
--- a/Documentation/githooks.txt
+++ b/Documentation/githooks.txt
@@ -521,6 +521,8 @@ The exit status of the hook is ignored for any state except for the
 cause the transaction to be aborted. The hook will not be called with
 "aborted" state in that case.
 
+Hooks run during 'reference-transaction' will be run in parallel by default.
+
 push-to-checkout
 ~~~~~~~~~~~~~~~~
 
diff --git a/refs.c b/refs.c
index 392f0bbf68..b67bca367e 100644
--- a/refs.c
+++ b/refs.c
@@ -18,6 +18,7 @@
 #include "strvec.h"
 #include "repository.h"
 #include "sigchain.h"
+#include "hook.h"
 
 /*
  * List of all available backends
@@ -1957,47 +1958,27 @@ int ref_update_reject_duplicates(struct string_list *refnames,
 static int run_transaction_hook(struct ref_transaction *transaction,
 				const char *state)
 {
-	struct child_process proc = CHILD_PROCESS_INIT;
 	struct strbuf buf = STRBUF_INIT;
-	const char *hook;
+	struct run_hooks_opt opt = RUN_HOOKS_OPT_INIT_ASYNC;
 	int ret = 0, i;
 
-	hook = find_hook("reference-transaction");
-	if (!hook)
-		return ret;
-
-	strvec_pushl(&proc.args, hook, state, NULL);
-	proc.in = -1;
-	proc.stdout_to_stderr = 1;
-	proc.trace2_hook_name = "reference-transaction";
-
-	ret = start_command(&proc);
-	if (ret)
-		return ret;
-
-	sigchain_push(SIGPIPE, SIG_IGN);
+	strvec_push(&opt.args, state);
 
 	for (i = 0; i < transaction->nr; i++) {
 		struct ref_update *update = transaction->updates[i];
 
 		strbuf_reset(&buf);
-		strbuf_addf(&buf, "%s %s %s\n",
+		strbuf_addf(&buf, "%s %s %s",
 			    oid_to_hex(&update->old_oid),
 			    oid_to_hex(&update->new_oid),
 			    update->refname);
-
-		if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
-			if (errno != EPIPE)
-				ret = -1;
-			break;
-		}
+		string_list_append(&opt.str_stdin, buf.buf);
 	}
 
-	close(proc.in);
-	sigchain_pop(SIGPIPE);
+	ret = run_hooks("reference-transaction", &opt);
+	run_hooks_opt_clear(&opt);
 	strbuf_release(&buf);
 
-	ret |= finish_command(&proc);
 	return ret;
 }
 
diff --git a/t/t1416-ref-transaction-hooks.sh b/t/t1416-ref-transaction-hooks.sh
index f6e741c6c0..17f11f5cb0 100755
--- a/t/t1416-ref-transaction-hooks.sh
+++ b/t/t1416-ref-transaction-hooks.sh
@@ -122,11 +122,11 @@ test_expect_success 'interleaving hook calls succeed' '
 
 	cat >expect <<-EOF &&
 		hooks/update refs/tags/PRE $ZERO_OID $PRE_OID
-		hooks/reference-transaction prepared
-		hooks/reference-transaction committed
+		$(pwd)/target-repo.git/hooks/reference-transaction prepared
+		$(pwd)/target-repo.git/hooks/reference-transaction committed
 		hooks/update refs/tags/POST $ZERO_OID $POST_OID
-		hooks/reference-transaction prepared
-		hooks/reference-transaction committed
+		$(pwd)/target-repo.git/hooks/reference-transaction prepared
+		$(pwd)/target-repo.git/hooks/reference-transaction committed
 	EOF
 
 	git push ./target-repo.git PRE POST &&
-- 
2.28.0.rc0.142.g3c755180ce-goog




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