+static int path_match(const char *path, int nr, char **match)
+{
+ int i;
+ int pathlen = strlen(path);
+
+ for (i = 0; i < nr; i++) {
+ char *s = match[i];
+ int len = strlen(s);
+
+ if (!len || len > pathlen)
+ continue;
+ if (memcmp(path + pathlen - len, s, len))
+ continue;
+ if (pathlen > len && path[pathlen - len - 1] != '/')
+ continue;
+ *s = 0;
+ return 1;
+ }
+ return 0;
+}
+
+struct ref {
+ struct ref *next;
+ unsigned char old_sha1[20];
+ unsigned char new_sha1[20];
+ char name[0];
+};
+
+static void exec_pack_objects(void)
+{
+ static char *args[] = {
+ "git-pack-objects",
+ "--stdout",
+ NULL
+ };
+ execvp("git-pack-objects", args);
+ die("git-pack-objects exec failed (%s)", strerror(errno));
+}
+
+static void exec_rev_list(struct ref *refs)
+{
+ static char *args[1000];
+ int i = 0;
+
+ args[i++] = "git-rev-list"; /* 0 */
+ args[i++] = "--objects"; /* 1 */
+ while (refs) {
+ char *buf = malloc(100);
+ if (i > 900)
+ die("git-rev-list environment overflow");
+ args[i++] = buf;
+ snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1));
+ buf += 50;
+ args[i++] = buf;
+ snprintf(buf, 50, "%s", sha1_to_hex(refs->new_sha1));
+ refs = refs->next;
+ }
+ args[i] = NULL;
+ execvp("git-rev-list", args);
+ die("git-rev-list exec failed (%s)", strerror(errno));
+}
+
+static void rev_list(int fd, struct ref *refs)