drop "match" parameter from get_remote_heads

The get_remote_heads function reads the list of remote refs
during git protocol session. It dates all the way back to
def88e9 (Commit first cut at "git-fetch-pack", 2005-07-04).
At that time, the idea was to come up with a list of refs we
were interested in, and then filter the list as we got it
from the remote side.

Later, 1baaae5 (Make maximal use of the remote refs,
2005-10-28) stopped filtering at the get_remote_heads layer,
letting us use the non-matching refs to find common history.

As a result, all callers now simply pass an empty match
list (and any future callers will want to do the same). So
let's drop these now-useless parameters.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/fetch-pack.c

@@ -976,7 +976,7 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
 				   args.verbose ? CONNECT_VERBOSE : 0);
 	}
 
-	get_remote_heads(fd[0], &ref, 0, NULL, 0, NULL);
+	get_remote_heads(fd[0], &ref, 0, NULL);
 
 	ref = fetch_pack(&args, fd, conn, ref, dest,
 		nr_heads, heads, pack_lockfile_ptr);

builtin/send-pack.c

@@ -494,8 +494,7 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
 
 	memset(&extra_have, 0, sizeof(extra_have));
 
-	get_remote_heads(fd[0], &remote_refs, 0, NULL, REF_NORMAL,
+	get_remote_heads(fd[0], &remote_refs, REF_NORMAL, &extra_have);
-			 &extra_have);
 
 	transport_verify_remote_names(nr_refspecs, refspecs);
 

cache.h

@@ -1033,7 +1033,7 @@ struct extra_have_objects {
 	int nr, alloc;
 	unsigned char (*array)[20];
 };
-extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
+extern struct ref **get_remote_heads(int in, struct ref **list, unsigned int flags, struct extra_have_objects *);
 extern int server_supports(const char *feature);
 
 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);

connect.c

@@ -53,7 +53,6 @@ static void add_extra_have(struct extra_have_objects *extra, unsigned char *sha1
  * Read all the refs from the other end
  */
 struct ref **get_remote_heads(int in, struct ref **list,
-			      int nr_match, char **match,
 			      unsigned int flags,
 			      struct extra_have_objects *extra_have)
 {
@@ -92,8 +91,6 @@ struct ref **get_remote_heads(int in, struct ref **list,
 
 		if (!check_ref(name, name_len, flags))
 			continue;
-		if (nr_match && !path_match(name, nr_match, match))
-			continue;
 		ref = alloc_ref(buffer + 41);
 		hashcpy(ref->old_sha1, old_sha1);
 		*list = ref;

remote-curl.c

@@ -200,7 +200,7 @@ static struct ref *parse_git_refs(struct discovery *heads)
 
 	if (start_async(&async))
 		die("cannot start thread to parse advertised refs");
-	get_remote_heads(async.out, &list, 0, NULL, 0, NULL);
+	get_remote_heads(async.out, &list, 0, NULL);
 	close(async.out);
 	if (finish_async(&async))
 		die("ref parsing thread failed");

transport.c

@@ -502,7 +502,7 @@ static struct ref *get_refs_via_connect(struct transport *transport, int for_pus
 	struct ref *refs;
 
 	connect_setup(transport, for_push, 0);
-	get_remote_heads(data->fd[0], &refs, 0, NULL,
+	get_remote_heads(data->fd[0], &refs,
 			 for_push ? REF_NORMAL : 0, &data->extra_have);
 	data->got_remote_heads = 1;
 
@@ -537,7 +537,7 @@ static int fetch_refs_via_pack(struct transport *transport,
 
 	if (!data->got_remote_heads) {
 		connect_setup(transport, 0, 0);
-		get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
+		get_remote_heads(data->fd[0], &refs_tmp, 0, NULL);
 		data->got_remote_heads = 1;
 	}
 
@@ -772,8 +772,7 @@ static int git_transport_push(struct transport *transport, struct ref *remote_re
 		struct ref *tmp_refs;
 		connect_setup(transport, 1, 0);
 
-		get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
+		get_remote_heads(data->fd[0], &tmp_refs, REF_NORMAL, NULL);
-				 NULL);
 		data->got_remote_heads = 1;
 	}