Ignore funny refname sent from remote

This allows the remote side (most notably, upload-pack) to show
additional information without affecting the downloader.  Peek-remote
does not ignore them -- this is to make it useful for Pasky's
automatic tag following.

Signed-off-by: Junio C Hamano <junkio@cox.net>

cache.h

@@ -331,7 +331,7 @@ extern int path_match(const char *path, int nr, char **match);
 extern int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
 		      int nr_refspec, char **refspec, int all);
 extern int get_ack(int fd, unsigned char *result_sha1);
-extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match);
+extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, int ignore_funny);
 
 extern struct packed_git *parse_pack_index(unsigned char *sha1);
 extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,

clone-pack.c

@@ -118,7 +118,7 @@ static int clone_pack(int fd[2], int nr_match, char **match)
 	int status;
 	pid_t pid;
 
-	get_remote_heads(fd[0], &refs, nr_match, match);
+	get_remote_heads(fd[0], &refs, nr_match, match, 1);
 	if (!refs) {
 		packet_flush(fd[1]);
 		die("no matching remote head");

connect.c

@@ -10,7 +10,8 @@
 /*
  * Read all the refs from the other end
  */
-struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match)
+struct ref **get_remote_heads(int in, struct ref **list,
+			      int nr_match, char **match, int ignore_funny)
 {
 	*list = NULL;
 	for (;;) {
@@ -29,6 +30,11 @@ struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **ma
 		if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
 			die("protocol error: expected sha/ref, got '%s'", buffer);
 		name = buffer + 41;
+
+		if (ignore_funny && 45 < len && !memcmp(name, "refs/", 5) &&
+		    check_ref_format(name + 5))
+			continue;
+
 		if (nr_match && !path_match(name, nr_match, match))
 			continue;
 		ref = xcalloc(1, sizeof(*ref) + len - 40);

fetch-pack.c

@@ -81,7 +81,7 @@ static int fetch_pack(int fd[2], int nr_match, char **match)
 	int status;
 	pid_t pid;
 
-	get_remote_heads(fd[0], &ref, nr_match, match);
+	get_remote_heads(fd[0], &ref, nr_match, match, 1);
 	if (!ref) {
 		packet_flush(fd[1]);
 		die("no matching remote head");

peek-remote.c

@@ -11,7 +11,7 @@ static int peek_remote(int fd[2])
 {
 	struct ref *ref;
 
-	get_remote_heads(fd[0], &ref, 0, NULL);
+	get_remote_heads(fd[0], &ref, 0, NULL, 0);
 	packet_flush(fd[1]);
 
 	while (ref) {

send-pack.c

@@ -181,7 +181,7 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
 	int new_refs;
 
 	/* No funny business with the matcher */
-	remote_tail = get_remote_heads(in, &remote_refs, 0, NULL);
+	remote_tail = get_remote_heads(in, &remote_refs, 0, NULL, 1);
 	get_local_heads();
 
 	/* match them up */