Merge branch 'jc/maint-fetch-alt'

* jc/maint-fetch-alt:
  fetch-pack: objects in our alternates are available to us
  refs_from_alternate: helper to use refs from alternates

Conflicts:
	builtin/receive-pack.c

1 files changed, 34 insertions, 0 deletions

diff --git a/transport.c b/transport.c
index f1c07816e0..a02f79aae3 100644
--- a/transport.c
+++ b/transport.c
@@ -1189,3 +1189,37 @@ char *transport_anonymize_url(const char *url)
 literal_copy:
 	return xstrdup(url);
 }
+
+int refs_from_alternate_cb(struct alternate_object_database *e, void *cb)
+{
+	char *other;
+	size_t len;
+	struct remote *remote;
+	struct transport *transport;
+	const struct ref *extra;
+	alternate_ref_fn *ref_fn = cb;
+
+	e->name[-1] = '\0';
+	other = xstrdup(real_path(e->base));
+	e->name[-1] = '/';
+	len = strlen(other);
+
+	while (other[len-1] == '/')
+		other[--len] = '\0';
+	if (len < 8 || memcmp(other + len - 8, "/objects", 8))
+		return 0;
+	/* Is this a git repository with refs? */
+	memcpy(other + len - 8, "/refs", 6);
+	if (!is_directory(other))
+		return 0;
+	other[len - 8] = '\0';
+	remote = remote_get(other);
+	transport = transport_get(remote, other);
+	for (extra = transport_get_remote_refs(transport);
+	     extra;
+	     extra = extra->next)
+		ref_fn(extra, NULL);
+	transport_disconnect(transport);
+	free(other);
+	return 0;
+}