[PATCH v4 1/4] transport: drop refnames from for_each_alternate_ref

[Taylor Blau <me@xxxxxxxxxxxx>]

From: Jeff King <peff@xxxxxxxx>

None of the current callers use the refname parameter we pass to their
callbacks. In theory somebody _could_ do so, but it's actually quite
weird if you think about it: it's a ref in somebody else's repository.
So the name has no meaning locally, and in fact there may be duplicates
if there are multiple alternates.

The users of this interface really only care about seeing some ref tips,
since that promises that the alternate has the full commit graph
reachable from there. So let's keep the information we pass back to the
bare minimum.

Signed-off-by: Jeff King <peff@xxxxxxxx>
Signed-off-by: Taylor Blau <me@xxxxxxxxxxxx>
---
 builtin/receive-pack.c | 3 +--
 fetch-pack.c           | 3 +--
 transport.c            | 6 +++---
 transport.h            | 2 +-
 4 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index 4d30001950..6792291f5e 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -281,8 +281,7 @@ static int show_ref_cb(const char *path_full, const struct object_id *oid,
 	return 0;
 }
 
-static void show_one_alternate_ref(const char *refname,
-				   const struct object_id *oid,
+static void show_one_alternate_ref(const struct object_id *oid,
 				   void *data)
 {
 	struct oidset *seen = data;
diff --git a/fetch-pack.c b/fetch-pack.c
index 75047a4b2a..b643de143b 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -76,8 +76,7 @@ struct alternate_object_cache {
 	size_t nr, alloc;
 };
 
-static void cache_one_alternate(const char *refname,
-				const struct object_id *oid,
+static void cache_one_alternate(const struct object_id *oid,
 				void *vcache)
 {
 	struct alternate_object_cache *cache = vcache;
diff --git a/transport.c b/transport.c
index 1c76d64aba..2e0bc414d0 100644
--- a/transport.c
+++ b/transport.c
@@ -1336,7 +1336,7 @@ static void read_alternate_refs(const char *path,
 	cmd.git_cmd = 1;
 	argv_array_pushf(&cmd.args, "--git-dir=%s", path);
 	argv_array_push(&cmd.args, "for-each-ref");
-	argv_array_push(&cmd.args, "--format=%(objectname) %(refname)");
+	argv_array_push(&cmd.args, "--format=%(objectname)");
 	cmd.env = local_repo_env;
 	cmd.out = -1;
 
@@ -1348,13 +1348,13 @@ static void read_alternate_refs(const char *path,
 		struct object_id oid;
 
 		if (get_oid_hex(line.buf, &oid) ||
-		    line.buf[GIT_SHA1_HEXSZ] != ' ') {
+		    line.buf[GIT_SHA1_HEXSZ]) {
 			warning(_("invalid line while parsing alternate refs: %s"),
 				line.buf);
 			break;
 		}
 
-		cb(line.buf + GIT_SHA1_HEXSZ + 1, &oid, data);
+		cb(&oid, data);
 	}
 
 	fclose(fh);
diff --git a/transport.h b/transport.h
index 01e717c29e..9baeca2d7a 100644
--- a/transport.h
+++ b/transport.h
@@ -261,6 +261,6 @@ int transport_refs_pushed(struct ref *ref);
 void transport_print_push_status(const char *dest, struct ref *refs,
 		  int verbose, int porcelain, unsigned int *reject_reasons);
 
-typedef void alternate_ref_fn(const char *refname, const struct object_id *oid, void *);
+typedef void alternate_ref_fn(const struct object_id *oid, void *);
 extern void for_each_alternate_ref(alternate_ref_fn, void *);
 #endif
-- 
2.19.0.221.g150f307af