[PATCH v4 5/5] receive-pack: refactor report for proc-receive

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From: Jiang Xin <zhiyou.jx@xxxxxxxxxxxxxxx>

The "proc-receive" may update one or more references, and will send its
result one by one in pkt-line format.  Each line of the result has four
fields and one optional message field, as "<old-oid> <new-oid> <ref>
<status> [<message>]".  See the following example:

    # OK, run this command successfully.
    PKT-LINE(old-oid new-oid ref ok)

    # NO, I reject it.
    PKT-LINE(old-oid new-oid ref ng reason)

    # OK, but use an alternate reference.
    PKT-LINE(old-oid new-oid ref ok ref:alt-ref)

    # It will fallthrough to receive-pack to execute.
    PKT-LINE(old-oid new-oid ref ft)

The first three fields have the same foramt as a command.

The forth field has a two-letter status code.  Available status code:

* ok: The command runs successfully.  If the optional message has a
  prefix "ref:", the hook has created/updated an alternate reference
  instead.

* ng: Fail to run the command. Error message is in the optional message
  field.

* ft: Will fallthrough to receive-pack to execute.

Signed-off-by: Jiang Xin <zhiyou.jx@xxxxxxxxxxxxxxx>
---
 builtin/receive-pack.c       | 21 +++++++--
 t/t5411-proc-receive-hook.sh | 90 +++++++++++++++++++++++++++++++++---
 transport.c                  | 27 +++++++----
 3 files changed, 119 insertions(+), 19 deletions(-)

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index fef97e6985..c791f562d0 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -326,6 +326,7 @@ static void write_head_info(void)
 struct command {
 	struct command *next;
 	const char *error_string;
+	const char *extra_string;
 	unsigned int skip_update:1,
 		     did_not_exist:1,
 		     run_proc_receive:1;
@@ -883,7 +884,12 @@ static int read_proc_receive_result(struct packet_reader *reader,
 			else
 				cmd->error_string = "failed";
 			code = 1;
-		} else if (strcmp("ok", status)) {
+		} else if (!strcmp("ok", status)) {
+			cmd->extra_string = xstrdup_or_null(msg);
+		} else if (!strcmp("ft", status)) {
+			/* Reset "run_proc_receive" field, and continue to run in "receive-pack" */
+			cmd->run_proc_receive = 0;
+		} else {
 			die("protocol error: proc-receive has bad status '%s' for '%s'",
 			    status, reader->line);
 		}
@@ -2190,12 +2196,17 @@ static void report(struct command *commands, const char *unpack_status)
 	packet_buf_write(&buf, "unpack %s\n",
 			 unpack_status ? unpack_status : "ok");
 	for (cmd = commands; cmd; cmd = cmd->next) {
-		if (!cmd->error_string)
-			packet_buf_write(&buf, "ok %s\n",
-					 cmd->ref_name);
-		else
+		if (!cmd->error_string) {
+			if (!cmd->extra_string)
+				packet_buf_write(&buf, "ok %s\n",
+						 cmd->ref_name);
+			else
+				packet_buf_write(&buf, "ok %s%c%s\n",
+						 cmd->ref_name, ' ', cmd->extra_string);
+		} else {
 			packet_buf_write(&buf, "ng %s %s\n",
 					 cmd->ref_name, cmd->error_string);
+		}
 	}
 	packet_buf_flush(&buf);
 
diff --git a/t/t5411-proc-receive-hook.sh b/t/t5411-proc-receive-hook.sh
index f9681bed34..917988ab57 100755
--- a/t/t5411-proc-receive-hook.sh
+++ b/t/t5411-proc-receive-hook.sh
@@ -691,9 +691,9 @@ test_expect_success "setup proc-receive hook" '
 	printf >&2 "# proc-receive hook\n"
 
 	test-tool proc-receive -v \
-		-r "$ZERO_OID $A refs/for/next/topic ok" \
+		-r "$ZERO_OID $A refs/for/next/topic ok ref:refs/pull/123/head" \
 		-r "$ZERO_OID $A refs/review/a/b/c/topic ok" \
-		-r "$ZERO_OID $A refs/for/master/topic ok"
+		-r "$ZERO_OID $A refs/for/master/topic ok ref:refs/pull/124/head"
 	EOF
 	chmod a+x upstream/hooks/proc-receive
 '
@@ -716,17 +716,17 @@ test_expect_success "report update of all special refs" '
 	remote: proc-receive< <ZERO-OID> <COMMIT-A> refs/for/next/topic
 	remote: proc-receive< <ZERO-OID> <COMMIT-A> refs/review/a/b/c/topic
 	remote: proc-receive< <ZERO-OID> <COMMIT-A> refs/for/master/topic
-	remote: proc-receive> <ZERO-OID> <COMMIT-A> refs/for/next/topic ok
+	remote: proc-receive> <ZERO-OID> <COMMIT-A> refs/for/next/topic ok ref:refs/pull/123/head
 	remote: proc-receive> <ZERO-OID> <COMMIT-A> refs/review/a/b/c/topic ok
-	remote: proc-receive> <ZERO-OID> <COMMIT-A> refs/for/master/topic ok
+	remote: proc-receive> <ZERO-OID> <COMMIT-A> refs/for/master/topic ok ref:refs/pull/124/head
 	remote: # post-receive hook
 	remote: post-receive< <ZERO-OID> <COMMIT-A> refs/for/next/topic
 	remote: post-receive< <ZERO-OID> <COMMIT-A> refs/review/a/b/c/topic
 	remote: post-receive< <ZERO-OID> <COMMIT-A> refs/for/master/topic
 	To ../upstream
-	 * [new reference]   HEAD -> refs/for/next/topic
+	 * [new reference]   HEAD -> refs/pull/123/head
 	 * [new reference]   HEAD -> refs/review/a/b/c/topic
-	 * [new reference]   HEAD -> refs/for/master/topic
+	 * [new reference]   HEAD -> refs/pull/124/head
 	EOF
 	test_cmp expect actual &&
 	(
@@ -873,4 +873,82 @@ test_expect_success "report mixed refs update (special ref first)" '
 	test_cmp expect actual
 '
 
+test_expect_success "config receive.procReceiveRefs for all ref/" '
+	(
+		cd upstream &&
+		git config --add receive.procReceiveRefs refs/
+	)
+'
+
+test_expect_success "setup proc-receive hook" '
+	cat >upstream/hooks/proc-receive <<-EOF &&
+	#!/bin/sh
+
+	printf >&2 "# proc-receive hook\n"
+
+	test-tool proc-receive -v \
+		-r "$A $ZERO_OID refs/heads/yyy ft" \
+		-r "$B $A refs/heads/zzz ft" \
+		-r "$A $B refs/for/master/topic ok ref:refs/pull/123/head" \
+		-r "$A $B refs/heads/master ft" \
+		-r "$B $A refs/for/next/topic ok ref:refs/pull/124/head"
+	EOF
+	chmod a+x upstream/hooks/proc-receive
+'
+
+test_expect_success "report test: fallthrough" '
+	(
+		cd workbench &&
+		git push -f origin \
+			:refs/heads/yyy \
+			$A:refs/heads/zzz \
+			HEAD:refs/for/master/topic \
+			HEAD:refs/for/next/topic \
+			$B:refs/heads/master
+	) >out 2>&1 &&
+	format_git_output <out >actual &&
+	cat >expect <<-EOF &&
+	remote: # pre-receive hook
+	remote: pre-receive< <COMMIT-A> <COMMIT-B> refs/heads/master
+	remote: pre-receive< <COMMIT-A> <ZERO-OID> refs/heads/yyy
+	remote: pre-receive< <COMMIT-B> <COMMIT-A> refs/heads/zzz
+	remote: pre-receive< <ZERO-OID> <COMMIT-A> refs/for/master/topic
+	remote: pre-receive< <ZERO-OID> <COMMIT-A> refs/for/next/topic
+	remote: # proc-receive hook
+	remote: proc-receive< <COMMIT-A> <COMMIT-B> refs/heads/master
+	remote: proc-receive< <COMMIT-A> <ZERO-OID> refs/heads/yyy
+	remote: proc-receive< <COMMIT-B> <COMMIT-A> refs/heads/zzz
+	remote: proc-receive< <ZERO-OID> <COMMIT-A> refs/for/master/topic
+	remote: proc-receive< <ZERO-OID> <COMMIT-A> refs/for/next/topic
+	remote: proc-receive> <COMMIT-A> <ZERO-OID> refs/heads/yyy ft
+	remote: proc-receive> <COMMIT-B> <COMMIT-A> refs/heads/zzz ft
+	remote: proc-receive> <COMMIT-A> <COMMIT-B> refs/for/master/topic ok ref:refs/pull/123/head
+	remote: proc-receive> <COMMIT-A> <COMMIT-B> refs/heads/master ft
+	remote: proc-receive> <COMMIT-B> <COMMIT-A> refs/for/next/topic ok ref:refs/pull/124/head
+	remote: # post-receive hook
+	remote: post-receive< <COMMIT-A> <ZERO-OID> refs/heads/yyy
+	remote: post-receive< <COMMIT-B> <COMMIT-A> refs/heads/zzz
+	remote: post-receive< <COMMIT-A> <COMMIT-B> refs/for/master/topic
+	remote: post-receive< <COMMIT-A> <COMMIT-B> refs/heads/master
+	remote: post-receive< <COMMIT-B> <COMMIT-A> refs/for/next/topic
+	To ../upstream
+	   1029397..ce858e6  <COMMIT-B> -> master
+	 - [deleted]         yyy
+	 + ce858e6...1029397 <COMMIT-A> -> zzz (forced update)
+	 * [new reference]   HEAD -> refs/pull/123/head
+	 * [new reference]   HEAD -> refs/pull/124/head
+	EOF
+	test_cmp expect actual &&
+	(
+		cd upstream &&
+		git show-ref
+	) >out &&
+	format_git_output <out >actual &&
+	cat >expect <<-EOF &&
+	<COMMIT-B> refs/heads/master
+	<COMMIT-A> refs/heads/zzz
+	EOF
+	test_cmp expect actual
+'
+
 test_done
diff --git a/transport.c b/transport.c
index b5b7bb841e..d51af11d48 100644
--- a/transport.c
+++ b/transport.c
@@ -463,11 +463,16 @@ static void print_ref_status(char flag, const char *summary,
 			     struct ref *to, struct ref *from, const char *msg,
 			     int porcelain, int summary_width)
 {
+	char *to_name = to->name;
+
+	if (to->remote_status && !strncmp("ref:", to->remote_status, 4))
+		to_name = to->remote_status + 4;
+
 	if (porcelain) {
 		if (from)
-			fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
+			fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to_name);
 		else
-			fprintf(stdout, "%c\t:%s\t", flag, to->name);
+			fprintf(stdout, "%c\t:%s\t", flag, to_name);
 		if (msg)
 			fprintf(stdout, "%s (%s)\n", summary, msg);
 		else
@@ -481,9 +486,9 @@ static void print_ref_status(char flag, const char *summary,
 		fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
 			summary, reset);
 		if (from)
-			fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
+			fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to_name));
 		else
-			fputs(prettify_refname(to->name), stderr);
+			fputs(prettify_refname(to_name), stderr);
 		if (msg) {
 			fputs(" (", stderr);
 			fputs(msg, stderr);
@@ -498,13 +503,19 @@ static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_widt
 	if (ref->deletion)
 		print_ref_status('-', "[deleted]", ref, NULL, NULL,
 				 porcelain, summary_width);
-	else if (is_null_oid(&ref->old_oid))
+	else if (is_null_oid(&ref->old_oid)) {
+		char *refname;
+
+		if (ref->remote_status && !strncmp(ref->remote_status, "ref:", 4))
+			refname = ref->remote_status + 4;
+		else
+			refname = ref->name;
 		print_ref_status('*',
-			(starts_with(ref->name, "refs/tags/") ? "[new tag]" :
-			(starts_with(ref->name, "refs/heads/") ? "[new branch]" :
+			(starts_with(refname, "refs/tags/") ? "[new tag]" :
+			(starts_with(refname, "refs/heads/") ? "[new branch]" :
 			"[new reference]")),
 			ref, ref->peer_ref, NULL, porcelain, summary_width);
-	else {
+	} else {
 		struct strbuf quickref = STRBUF_INIT;
 		char type;
 		const char *msg;
-- 
2.26.0.rc1.33.g4914ba4bcf




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