object-store.h: move for_each_alternate_ref() from transport.h

There's nothing inherently transport-related about enumerating the
alternate ref tips. The code has lived in transport.[ch] because the
only use so far had been advertising available tips during transport.
But it could be used for more, and a future patch will teach rev-list to
access these refs.

Let's move it alongside the other alt-odb code, declaring it in
object-store.h with the implementation in sha1-file.c.

This lets us drop the inclusion of transport.h from receive-pack, which
perhaps shows how it was misplaced (though receive-pack is about
transporting objects, transport.h is mostly about the client side).

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

1 files changed, 0 insertions, 97 deletions

diff --git a/transport.c b/transport.c
index f1fcd2c4b0..2def5a0c35 100644
--- a/transport.c
+++ b/transport.c
@@ -1380,100 +1380,3 @@ char *transport_anonymize_url(const char *url)
 literal_copy:
 	return xstrdup(url);
 }
-
-static void fill_alternate_refs_command(struct child_process *cmd,
-					const char *repo_path)
-{
-	const char *value;
-
-	if (!git_config_get_value("core.alternateRefsCommand", &value)) {
-		cmd->use_shell = 1;
-
-		argv_array_push(&cmd->args, value);
-		argv_array_push(&cmd->args, repo_path);
-	} else {
-		cmd->git_cmd = 1;
-
-		argv_array_pushf(&cmd->args, "--git-dir=%s", repo_path);
-		argv_array_push(&cmd->args, "for-each-ref");
-		argv_array_push(&cmd->args, "--format=%(objectname)");
-
-		if (!git_config_get_value("core.alternateRefsPrefixes", &value)) {
-			argv_array_push(&cmd->args, "--");
-			argv_array_split(&cmd->args, value);
-		}
-	}
-
-	cmd->env = local_repo_env;
-	cmd->out = -1;
-}
-
-static void read_alternate_refs(const char *path,
-				alternate_ref_fn *cb,
-				void *data)
-{
-	struct child_process cmd = CHILD_PROCESS_INIT;
-	struct strbuf line = STRBUF_INIT;
-	FILE *fh;
-
-	fill_alternate_refs_command(&cmd, path);
-
-	if (start_command(&cmd))
-		return;
-
-	fh = xfdopen(cmd.out, "r");
-	while (strbuf_getline_lf(&line, fh) != EOF) {
-		struct object_id oid;
-		const char *p;
-
-		if (parse_oid_hex(line.buf, &oid, &p) || *p) {
-			warning(_("invalid line while parsing alternate refs: %s"),
-				line.buf);
-			break;
-		}
-
-		cb(&oid, data);
-	}
-
-	fclose(fh);
-	finish_command(&cmd);
-}
-
-struct alternate_refs_data {
-	alternate_ref_fn *fn;
-	void *data;
-};
-
-static int refs_from_alternate_cb(struct object_directory *e,
-				  void *data)
-{
-	struct strbuf path = STRBUF_INIT;
-	size_t base_len;
-	struct alternate_refs_data *cb = data;
-
-	if (!strbuf_realpath(&path, e->path, 0))
-		goto out;
-	if (!strbuf_strip_suffix(&path, "/objects"))
-		goto out;
-	base_len = path.len;
-
-	/* Is this a git repository with refs? */
-	strbuf_addstr(&path, "/refs");
-	if (!is_directory(path.buf))
-		goto out;
-	strbuf_setlen(&path, base_len);
-
-	read_alternate_refs(path.buf, cb->fn, cb->data);
-
-out:
-	strbuf_release(&path);
-	return 0;
-}
-
-void for_each_alternate_ref(alternate_ref_fn fn, void *data)
-{
-	struct alternate_refs_data cb;
-	cb.fn = fn;
-	cb.data = data;
-	foreach_alt_odb(refs_from_alternate_cb, &cb);
-}