void mark_parents_uninteresting(struct commit *commit)
{
struct commit_list *parents = commit->parents;
while (parents) {
struct commit *commit = parents->item;
if (!(commit->object.flags & UNINTERESTING)) {
commit->object.flags |= UNINTERESTING;
/*
* Normally we haven't parsed the parent
* yet, so we won't have a parent of a parent
* here. However, it may turn out that we've
* reached this commit some other way (where it
* wasn't uninteresting), in which case we need
* to mark its parents recursively too..
*/
if (commit->parents)
mark_parents_uninteresting(commit);
}
/*
* 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;
}
}
static int limit_list(struct rev_info *revs)
{
int slop = SLOP;
unsigned long date = ~0ul;
struct commit_list *list = revs->commits;
struct commit_list *newlist = NULL;
struct commit_list **p = &newlist;
while (list) {
struct commit_list *entry = list;
struct commit *commit = list->item;
struct object *obj = &commit->object;
show_early_output_fn_t show;
list = list->next;
free(entry);
if (revs->max_age != -1 && (commit->date < revs->max_age))
obj->flags |= UNINTERESTING;
if (add_parents_to_list(revs, commit, &list, NULL) < 0)
return -1;
if (obj->flags & UNINTERESTING) {
mark_parents_uninteresting(commit);
if (revs->show_all)
p = &commit_list_insert(commit, p)->next;
slop = still_interesting(list, date, slop);
if (slop)
continue;
/* If showing all, add the whole pending list to the end */
if (revs->show_all)
*p = list;
break;
}
if (revs->min_age != -1 && (commit->date > revs->min_age))
continue;
date = commit->date;
p = &commit_list_insert(commit, p)->next;
show = show_early_output;
if (!show)
continue;
show(revs, newlist);
show_early_output = NULL;
}
if (revs->cherry_pick)
cherry_pick_list(newlist, revs);
revs->commits = newlist;
return 0;
}
static struct commit *handle_commit(struct rev_info *revs, struct object *object, const char *name)
{
unsigned long flags = object->flags;
/*
* Tag object? Look what it points to..
*/
while (object->type == OBJ_TAG) {
struct tag *tag = (struct tag *) object;
if (revs->tag_objects && !(flags & UNINTERESTING))
add_pending_object(revs, object, tag->tag);
if (!tag->tagged)
die("bad tag");
object = parse_object(tag->tagged->sha1);
if (!object)
die("bad object %s", sha1_to_hex(tag->tagged->sha1));
}
/*
* Commit object? Just return it, we'll do all the complex
* reachability crud.
*/
if (object->type == OBJ_COMMIT) {
struct commit *commit = (struct commit *)object;
if (parse_commit(commit) < 0)
die("unable to parse commit %s", name);
if (flags & UNINTERESTING) {
commit->object.flags |= UNINTERESTING;
mark_parents_uninteresting(commit);
revs->limited = 1;
}
return commit;
}
/*
* Tree object? Either mark it uniniteresting, or add it
* to the list of objects to look at later..
*/
if (object->type == OBJ_TREE) {
struct tree *tree = (struct tree *)object;
if (!revs->tree_objects)
return NULL;
if (flags & UNINTERESTING) {
mark_tree_uninteresting(tree);
return NULL;
}
add_pending_object(revs, object, "");
return NULL;
}
/*
* Blob object? You know the drill by now..
*/
if (object->type == OBJ_BLOB) {
struct blob *blob = (struct blob *)object;
if (!revs->blob_objects)
return NULL;
if (flags & UNINTERESTING) {
mark_blob_uninteresting(blob);
return NULL;
}
add_pending_object(revs, object, "");
return NULL;
}
die("%s is unknown object", name);
}
static int add_parents_to_list(struct rev_info *revs, struct commit *commit,
struct commit_list **list, struct commit_list **cache_ptr)
{
struct commit_list *parent = commit->parents;
unsigned left_flag;
struct commit_list *cached_base = cache_ptr ? *cache_ptr : NULL;
if (commit->object.flags & ADDED)
return 0;
commit->object.flags |= ADDED;
/*
* If the commit is uninteresting, don't try to
* prune parents - we want the maximal uninteresting
* set.
*
* Normally we haven't parsed the parent
* yet, so we won't have a parent of a parent
* here. However, it may turn out that we've
* reached this commit some other way (where it
* wasn't uninteresting), in which case we need
* to mark its parents recursively too..
*/
if (commit->object.flags & UNINTERESTING) {
while (parent) {
struct commit *p = parent->item;
parent = parent->next;
if (parse_commit(p) < 0)
return -1;
p->object.flags |= UNINTERESTING;
if (p->parents)
mark_parents_uninteresting(p);
if (p->object.flags & SEEN)
continue;
p->object.flags |= SEEN;
insert_by_date_cached(p, list, cached_base, cache_ptr);
}
return 0;
}
/*
* Ok, the commit wasn't uninteresting. Try to
* simplify the commit history and find the parent
* that has no differences in the path set if one exists.
*/
try_to_simplify_commit(revs, commit);
if (revs->no_walk)
return 0;
left_flag = (commit->object.flags & SYMMETRIC_LEFT);
for (parent = commit->parents; parent; parent = parent->next) {
struct commit *p = parent->item;
if (parse_commit(p) < 0)
return -1;
p->object.flags |= left_flag;
if (!(p->object.flags & SEEN)) {
p->object.flags |= SEEN;
insert_by_date_cached(p, list, cached_base, cache_ptr);
}
if (revs->first_parent_only)
break;
}
return 0;
}
/*
* The main loop -- while we have blobs with lines whose true origin
* is still unknown, pick one blob, and allow its lines to pass blames
* to its parents. */
void assign_blame(struct blame_scoreboard *sb, int opt)
{
struct rev_info *revs = sb->revs;
struct commit *commit = prio_queue_get(&sb->commits);
while (commit) {
struct blame_entry *ent;
struct blame_origin *suspect = commit->util;
/* find one suspect to break down */
while (suspect && !suspect->suspects)
suspect = suspect->next;
if (!suspect) {
commit = prio_queue_get(&sb->commits);
continue;
}
assert(commit == suspect->commit);
/*
* We will use this suspect later in the loop,
* so hold onto it in the meantime.
*/
blame_origin_incref(suspect);
parse_commit(commit);
if (sb->reverse ||
(!(commit->object.flags & UNINTERESTING) &&
!(revs->max_age != -1 && commit->date < revs->max_age)))
pass_blame(sb, suspect, opt);
else {
commit->object.flags |= UNINTERESTING;
if (commit->object.parsed)
mark_parents_uninteresting(commit);
}
/* treat root commit as boundary */
if (!commit->parents && !sb->show_root)
commit->object.flags |= UNINTERESTING;
/* Take responsibility for the remaining entries */
ent = suspect->suspects;
if (ent) {
suspect->guilty = 1;
for (;;) {
struct blame_entry *next = ent->next;
if (sb->found_guilty_entry)
sb->found_guilty_entry(ent, sb->found_guilty_entry_data);
if (next) {
ent = next;
continue;
}
ent->next = sb->ent;
sb->ent = suspect->suspects;
suspect->suspects = NULL;
break;
}
}
blame_origin_decref(suspect);
if (sb->debug) /* sanity */
sanity_check_refcnt(sb);
}
}
