+struct recent_data {
+ struct rev_info *revs;
+ unsigned long timestamp;
+};
+
+static void add_recent_object(const unsigned char *sha1,
+ unsigned long mtime,
+ struct recent_data *data)
+{
+ struct object *obj;
+ enum object_type type;
+
+ if (mtime <= data->timestamp)
+ return;
+
+ /*
+ * We do not want to call parse_object here, because
+ * inflating blobs and trees could be very expensive.
+ * However, we do need to know the correct type for
+ * later processing, and the revision machinery expects
+ * commits and tags to have been parsed.
+ */
+ type = sha1_object_info(sha1, NULL);
+ if (type < 0)
+ die("unable to get object info for %s", sha1_to_hex(sha1));
+
+ switch (type) {
+ case OBJ_TAG:
+ case OBJ_COMMIT:
+ obj = parse_object_or_die(sha1, NULL);
+ break;
+ case OBJ_TREE:
+ obj = (struct object *)lookup_tree(sha1);
+ break;
+ case OBJ_BLOB:
+ obj = (struct object *)lookup_blob(sha1);
+ break;
+ default:
+ die("unknown object type for %s: %s",
+ sha1_to_hex(sha1), typename(type));
+ }
+
+ if (!obj)
+ die("unable to lookup %s", sha1_to_hex(sha1));
+
+ add_pending_object(data->revs, obj, "");
+}
+
+static int add_recent_loose(const unsigned char *sha1,
+ const char *path, void *data)
+{
+ struct stat st;
+ struct object *obj = lookup_object(sha1);
+
+ if (obj && obj->flags & SEEN)
+ return 0;
+
+ if (stat(path, &st) < 0) {
+ /*
+ * It's OK if an object went away during our iteration; this
+ * could be due to a simultaneous repack. But anything else
+ * we should abort, since we might then fail to mark objects
+ * which should not be pruned.
+ */
+ if (errno == ENOENT)
+ return 0;
+ return error("unable to stat %s: %s",
+ sha1_to_hex(sha1), strerror(errno));
+ }
+
+ add_recent_object(sha1, st.st_mtime, data);
+ return 0;
+}
+
+static int add_recent_packed(const unsigned char *sha1,
+ struct packed_git *p, uint32_t pos,
+ void *data)
+{
+ struct object *obj = lookup_object(sha1);
+
+ if (obj && obj->flags & SEEN)
+ return 0;
+ add_recent_object(sha1, p->mtime, data);
+ return 0;
+}
+
+static int add_unseen_recent_objects_to_traversal(struct rev_info *revs,
+ unsigned long timestamp)
+{
+ struct recent_data data;
+ int r;
+
+ data.revs = revs;
+ data.timestamp = timestamp;
+
+ r = for_each_loose_object(add_recent_loose, &data);
+ if (r)
+ return r;
+ return for_each_packed_object(add_recent_packed, &data);
+}
+