[PATCH v6 p2 1/9] transport-helper: update remote helper namespace

[Felipe Contreras <felipe.contreras@gmail.com>]

When pushing, the remote namespace is updated correctly
(e.g. refs/origin/master), but not the remote helper's
(e.g. refs/testgit/origin/master).

This alone should not cause any regressions, but combined with other
patches to handle negative refs correctly (upcoming patch), it might.
However, that's a good thing;  otherwise those issues would go
unnoticed.

For the moment though, this patch alone shouldn't cause any issues, in
fact the rest of the code seems to rely on this happening.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
---
 transport-helper.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/transport-helper.c b/transport-helper.c
index cfe0988..32ad877 100644
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -10,6 +10,7 @@
 #include "string-list.h"
 #include "thread-utils.h"
 #include "sigchain.h"
+#include "refs.h"
 
 static int debug;
 
@@ -600,7 +601,7 @@ static int fetch(struct transport *transport,
 	return -1;
 }
 
-static void push_update_ref_status(struct strbuf *buf,
+static int push_update_ref_status(struct strbuf *buf,
 				   struct ref **ref,
 				   struct ref *remote_refs)
 {
@@ -651,7 +652,7 @@ static void push_update_ref_status(struct strbuf *buf,
 		*ref = find_ref_by_name(remote_refs, refname);
 	if (!*ref) {
 		warning("helper reported unexpected status of %s", refname);
-		return;
+		return 1;
 	}
 
 	if ((*ref)->status != REF_STATUS_NONE) {
@@ -660,11 +661,12 @@ static void push_update_ref_status(struct strbuf *buf,
 		 * status reported by the remote helper if the latter is 'no match'.
 		 */
 		if (status == REF_STATUS_NONE)
-			return;
+			return 1;
 	}
 
 	(*ref)->status = status;
 	(*ref)->remote_status = msg;
+	return 0;
 }
 
 static void push_update_refs_status(struct helper_data *data,
@@ -673,11 +675,23 @@ static void push_update_refs_status(struct helper_data *data,
 	struct strbuf buf = STRBUF_INIT;
 	struct ref *ref = remote_refs;
 	for (;;) {
+		char *private;
+
 		recvline(data, &buf);
 		if (!buf.len)
 			break;
 
-		push_update_ref_status(&buf, &ref, remote_refs);
+		if (push_update_ref_status(&buf, &ref, remote_refs))
+			continue;
+
+		if (!data->refspecs)
+			continue;
+
+		/* propagate back the update to the remote namespace */
+		private = apply_refspecs(data->refspecs, data->refspec_nr, ref->name);
+		if (!private)
+			continue;
+		update_ref("update by helper", private, ref->new_sha1, NULL, 0, 0);
 	}
 	strbuf_release(&buf);
 }
-- 
1.8.0