Reduce the number of connects when fetching

diff --git a/pack-write.c b/pack-write.c
index e59b197e5ebb301107f9a18b7765e18097a1c8e3..665e2b29b8817aa6a8aa83ccd859ab51e7bb2234 100644 (file)
--- a/pack-write.c
+++ b/pack-write.c
@@ -17,7 +17,8 @@ static int sha1_compare(const void *_a, const void *_b)
  * the SHA1 hash of sorted object names. The objects array passed in
  * will be sorted by SHA1 on exit.
  */
-const char *write_idx_file(const char *index_name, struct pack_idx_entry **objects, int nr_objects, unsigned char *sha1)
+char *write_idx_file(char *index_name, struct pack_idx_entry **objects,
+                    int nr_objects, unsigned char *sha1)
 {
        struct sha1file *f;
        struct pack_idx_entry **sorted_by_sha, **list, **last;
@@ -179,3 +180,29 @@ void fixup_pack_header_footer(int pack_fd,
        SHA1_Final(pack_file_sha1, &c);
        write_or_die(pack_fd, pack_file_sha1, 20);
 }
+
+char *index_pack_lockfile(int ip_out)
+{
+       int len, s;
+       char packname[46];
+
+       /*
+        * The first thing we expects from index-pack's output
+        * is "pack\t%40s\n" or "keep\t%40s\n" (46 bytes) where
+        * %40s is the newly created pack SHA1 name.  In the "keep"
+        * case, we need it to remove the corresponding .keep file
+        * later on.  If we don't get that then tough luck with it.
+        */
+       for (len = 0;
+                len < 46 && (s = xread(ip_out, packname+len, 46-len)) > 0;
+                len += s);
+       if (len == 46 && packname[45] == '\n' &&
+               memcmp(packname, "keep\t", 5) == 0) {
+               char path[PATH_MAX];
+               packname[45] = 0;
+               snprintf(path, sizeof(path), "%s/pack/pack-%s.keep",
+                        get_object_directory(), packname + 5);
+               return xstrdup(path);
+       }
+       return NULL;
+}