/*
* Helper for blame_chunk(). blame_entry e is known to overlap with the patch
* hunk; split it and pass blame to the parent.
*/
static void blame_overlap(
git_blame *blame,
git_blame__entry *e,
size_t tlno,
size_t plno,
size_t same,
git_blame__origin *parent)
{
git_blame__entry split[3] = {{0}};
split_overlap(split, e, tlno, plno, same, parent);
if (split[1].suspect)
split_blame(blame, split, e);
decref_split(split);
}
/*
* See if lines currently target is suspected for can be attributed to
* parent.
*/
static void find_move_in_parent(struct blame_scoreboard *sb,
struct blame_entry ***blamed,
struct blame_entry **toosmall,
struct blame_origin *target,
struct blame_origin *parent)
{
struct blame_entry *e, split[3];
struct blame_entry *unblamed = target->suspects;
struct blame_entry *leftover = NULL;
mmfile_t file_p;
if (!unblamed)
return; /* nothing remains for this target */
fill_origin_blob(&sb->revs->diffopt, parent, &file_p, &sb->num_read_blob);
if (!file_p.ptr)
return;
/* At each iteration, unblamed has a NULL-terminated list of
* entries that have not yet been tested for blame. leftover
* contains the reversed list of entries that have been tested
* without being assignable to the parent.
*/
do {
struct blame_entry **unblamedtail = &unblamed;
struct blame_entry *next;
for (e = unblamed; e; e = next) {
next = e->next;
find_copy_in_blob(sb, e, parent, split, &file_p);
if (split[1].suspect &&
sb->move_score < blame_entry_score(sb, &split[1])) {
split_blame(blamed, &unblamedtail, split, e);
} else {
e->next = leftover;
leftover = e;
}
decref_split(split);
}
*unblamedtail = NULL;
toosmall = filter_small(sb, toosmall, &unblamed, sb->move_score);
} while (unblamed);
target->suspects = reverse_blame(leftover, NULL);
}
/*
* For lines target is suspected for, see if we can find code movement
* across file boundary from the parent commit. porigin is the path
* in the parent we already tried.
*/
static void find_copy_in_parent(struct blame_scoreboard *sb,
struct blame_entry ***blamed,
struct blame_entry **toosmall,
struct blame_origin *target,
struct commit *parent,
struct blame_origin *porigin,
int opt)
{
struct diff_options diff_opts;
int i, j;
struct blame_list *blame_list;
int num_ents;
struct blame_entry *unblamed = target->suspects;
struct blame_entry *leftover = NULL;
if (!unblamed)
return; /* nothing remains for this target */
diff_setup(&diff_opts);
diff_opts.flags.recursive = 1;
diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT;
diff_setup_done(&diff_opts);
/* Try "find copies harder" on new path if requested;
* we do not want to use diffcore_rename() actually to
* match things up; find_copies_harder is set only to
* force diff_tree_oid() to feed all filepairs to diff_queue,
* and this code needs to be after diff_setup_done(), which
* usually makes find-copies-harder imply copy detection.
*/
if ((opt & PICKAXE_BLAME_COPY_HARDEST)
|| ((opt & PICKAXE_BLAME_COPY_HARDER)
&& (!porigin || strcmp(target->path, porigin->path))))
diff_opts.flags.find_copies_harder = 1;
if (is_null_oid(&target->commit->object.oid))
do_diff_cache(get_commit_tree_oid(parent), &diff_opts);
else
diff_tree_oid(get_commit_tree_oid(parent),
get_commit_tree_oid(target->commit),
"", &diff_opts);
if (!diff_opts.flags.find_copies_harder)
diffcore_std(&diff_opts);
do {
struct blame_entry **unblamedtail = &unblamed;
blame_list = setup_blame_list(unblamed, &num_ents);
for (i = 0; i < diff_queued_diff.nr; i++) {
struct diff_filepair *p = diff_queued_diff.queue[i];
struct blame_origin *norigin;
mmfile_t file_p;
struct blame_entry potential[3];
if (!DIFF_FILE_VALID(p->one))
continue; /* does not exist in parent */
if (S_ISGITLINK(p->one->mode))
continue; /* ignore git links */
if (porigin && !strcmp(p->one->path, porigin->path))
/* find_move already dealt with this path */
continue;
norigin = get_origin(parent, p->one->path);
oidcpy(&norigin->blob_oid, &p->one->oid);
norigin->mode = p->one->mode;
fill_origin_blob(&sb->revs->diffopt, norigin, &file_p, &sb->num_read_blob);
if (!file_p.ptr)
continue;
for (j = 0; j < num_ents; j++) {
find_copy_in_blob(sb, blame_list[j].ent,
norigin, potential, &file_p);
copy_split_if_better(sb, blame_list[j].split,
potential);
decref_split(potential);
}
blame_origin_decref(norigin);
}
for (j = 0; j < num_ents; j++) {
struct blame_entry *split = blame_list[j].split;
if (split[1].suspect &&
sb->copy_score < blame_entry_score(sb, &split[1])) {
split_blame(blamed, &unblamedtail, split,
blame_list[j].ent);
} else {
blame_list[j].ent->next = leftover;
leftover = blame_list[j].ent;
}
decref_split(split);
}
free(blame_list);
*unblamedtail = NULL;
toosmall = filter_small(sb, toosmall, &unblamed, sb->copy_score);
} while (unblamed);
target->suspects = reverse_blame(leftover, NULL);
diff_flush(&diff_opts);
clear_pathspec(&diff_opts.pathspec);
}
