git-rev-list: allow missing objects when the parent is marked UNINTERESTING

We still want the "top-most" uninteresting object to exist, so that we
know that we have reached it.

diff --git a/rev-list.c b/rev-list.c
index dfa0933..0c0bdc2 100644 (file)
--- a/rev-list.c
+++ b/rev-list.c
@@ -203,6 +203,8 @@ static void mark_tree_uninteresting(struct tree *tree)
        if (obj->flags & UNINTERESTING)
                return;
        obj->flags |= UNINTERESTING;
+       if (!has_sha1_file(obj->sha1))
+               return;
        if (parse_tree(tree) < 0)
                die("bad tree %s", sha1_to_hex(obj->sha1));
        entry = tree->entries;
@@ -224,6 +226,17 @@ static void mark_parents_uninteresting(struct commit *commit)
        while (parents) {
                struct commit *commit = parents->item;
                commit->object.flags |= UNINTERESTING;
+
+               /*
+                * A missing commit is ok iff its parent is marked 
+                * uninteresting.
+                *
+                * We just mark such a thing parsed, so that when
+                * it is popped next time around, we won't be trying
+                * to parse it and get an error.
+                */
+               if (!has_sha1_file(commit->object.sha1))
+                       commit->object.parsed = 1;
                parents = parents->next;
        }
 }
@@ -371,6 +384,8 @@ static struct commit *get_commit_reference(const char *name, unsigned int flags)
                object->flags |= flags;
                if (parse_commit(commit) < 0)
                        die("unable to parse commit %s", name);
+               if (flags & UNINTERESTING)
+                       mark_parents_uninteresting(commit);
                return commit;
        }