If we aren't going to use a ref there is no reason for us to open
its object from the object database. This avoids opening any of
the head commits reachable from refs/heads/ unless they are also
reachable through the commit we have been asked to describe and
we need to walk through it to find a tag.
Signed-off-by: Shawn O. Pearce <spearce@xxxxxxxxxxx>
---
builtin-describe.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/builtin-describe.c b/builtin-describe.c
index bfd25e2..9c958bd 100644
--- a/builtin-describe.c
+++ b/builtin-describe.c
@@ -46,11 +46,15 @@ static void add_to_known_names(const char *path,
static int get_name(const char *path, const unsigned char *sha1, int flag, void *cb_data)
{
+ int might_be_tag = !prefixcmp(path, "refs/tags/");
struct commit *commit;
struct object *object;
unsigned char peeled[20];
int is_tag, prio;
+ if (!all && !might_be_tag)
+ return 0;
+
if (!peel_ref(path, peeled) && !is_null_sha1(peeled)) {
commit = lookup_commit_reference_gently(peeled, 1);
if (!commit)
@@ -68,7 +72,7 @@ static int get_name(const char *path, const unsigned char *sha1, int flag, void
* If --tags, then any tags are used.
* Otherwise only annotated tags are used.
*/
- if (!prefixcmp(path, "refs/tags/")) {
+ if (might_be_tag) {
if (is_tag) {
prio = 2;
if (pattern && fnmatch(pattern, path + 10, 0))
--
1.5.4.3.295.g6b554
-
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