pack-objects: reuse deflated data from new-style loose objects.

When packing an object without deltifying, if the data is stored in
a loose object that is encoded with a new style header, copy it without
inflating and deflating.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/pack-objects.c b/pack-objects.c
index 861c7f08ff1b68eee141442411b4706a1bcc2518..e52e9774e587872bf98a4254ea8cc1f949df130d 100644 (file)
--- a/pack-objects.c
+++ b/pack-objects.c
@@ -269,6 +269,22 @@ static unsigned long write_object(struct sha1file *f,
                                 * and we do not need to deltify it.
                                 */
 
+       if (!entry->in_pack && !entry->delta) {
+               unsigned char *map;
+               unsigned long mapsize;
+               map = map_sha1_file(entry->sha1, &mapsize);
+               if (map && !legacy_loose_object(map)) {
+                       /* We can copy straight into the pack file */
+                       sha1write(f, map, mapsize);
+                       munmap(map, mapsize);
+                       written++;
+                       reused++;
+                       return mapsize;
+               }
+               if (map)
+                       munmap(map, mapsize);
+       }
+
        if (! to_reuse) {
                buf = read_sha1_file(entry->sha1, type, &size);
                if (!buf)