Merge branch 'jk/fsck-doc'
[git/git.git] / builtin / fsck.c
index bb4227b..d26fb0a 100644 (file)
@@ -235,6 +235,48 @@ static int mark_used(struct object *obj, int type, void *data, struct fsck_optio
        return 0;
 }
 
+static void mark_unreachable_referents(const struct object_id *oid)
+{
+       struct fsck_options options = FSCK_OPTIONS_DEFAULT;
+       struct object *obj = lookup_object(the_repository, oid->hash);
+
+       if (!obj || !(obj->flags & HAS_OBJ))
+               return; /* not part of our original set */
+       if (obj->flags & REACHABLE)
+               return; /* reachable objects already traversed */
+
+       /*
+        * Avoid passing OBJ_NONE to fsck_walk, which will parse the object
+        * (and we want to avoid parsing blobs).
+        */
+       if (obj->type == OBJ_NONE) {
+               enum object_type type = oid_object_info(the_repository,
+                                                       &obj->oid, NULL);
+               if (type > 0)
+                       object_as_type(the_repository, obj, type, 0);
+       }
+
+       options.walk = mark_used;
+       fsck_walk(obj, NULL, &options);
+}
+
+static int mark_loose_unreachable_referents(const struct object_id *oid,
+                                           const char *path,
+                                           void *data)
+{
+       mark_unreachable_referents(oid);
+       return 0;
+}
+
+static int mark_packed_unreachable_referents(const struct object_id *oid,
+                                            struct packed_git *pack,
+                                            uint32_t pos,
+                                            void *data)
+{
+       mark_unreachable_referents(oid);
+       return 0;
+}
+
 /*
  * Check a single reachable object
  */
@@ -347,6 +389,26 @@ static void check_connectivity(void)
        /* Traverse the pending reachable objects */
        traverse_reachable();
 
+       /*
+        * With --connectivity-only, we won't have actually opened and marked
+        * unreachable objects with USED. Do that now to make --dangling, etc
+        * accurate.
+        */
+       if (connectivity_only && (show_dangling || write_lost_and_found)) {
+               /*
+                * Even though we already have a "struct object" for each of
+                * these in memory, we must not iterate over the internal
+                * object hash as we do below. Our loop would potentially
+                * resize the hash, making our iteration invalid.
+                *
+                * Instead, we'll just go back to the source list of objects,
+                * and ignore any that weren't present in our earlier
+                * traversal.
+                */
+               for_each_loose_object(mark_loose_unreachable_referents, NULL, 0);
+               for_each_packed_object(mark_packed_unreachable_referents, NULL, 0);
+       }
+
        /* Look up all the requirements, warn about missing objects.. */
        max = get_max_object_index();
        if (verbose)