When the final blame is laid for a line to a <commit, path> pair, it also
gives a "previous" information to --porcelain and --incremental output
format. It gives the parent commit of the blamed commit, _and_ a path in
that parent commit that corresponds to the blamed path --- in short, it is
the origin that would have been blamed (or passed blame through) for the
line _if_ the blamed commit did not change that line.
This unfortunately makes sanity checking of refcount quite complex, so I
ripped it out for now.
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
builtin-blame.c | 42 ++++++++++++------------------------------
1 files changed, 12 insertions(+), 30 deletions(-)
diff --git a/builtin-blame.c b/builtin-blame.c
index 4b9c601..a46e402 100644
--- a/builtin-blame.c
+++ b/builtin-blame.c
@@ -82,6 +82,7 @@ static unsigned blame_copy_score;
*/
struct origin {
int refcnt;
+ struct origin *previous;
struct commit *commit;
mmfile_t file;
unsigned char blob_sha1[20];
@@ -123,6 +124,8 @@ static inline struct origin *origin_incref(struct origin *o)
static void origin_decref(struct origin *o)
{
if (o && --o->refcnt <= 0) {
+ if (o->previous)
+ origin_decref(o->previous);
free(o->file.ptr);
free(o);
}
@@ -1280,6 +1283,10 @@ static void pass_blame(struct scoreboard *sb, struct origin *origin, int opt)
struct origin *porigin = sg_origin[i];
if (!porigin)
continue;
+ if (!origin->previous) {
+ origin_incref(porigin);
+ origin->previous = porigin;
+ }
if (pass_blame_to_parent(sb, origin, porigin))
goto finish;
}
@@ -1503,6 +1510,11 @@ static int emit_one_suspect_detail(struct origin *suspect)
printf("summary %s\n", ci.summary);
if (suspect->commit->object.flags & UNINTERESTING)
printf("boundary\n");
+ if (suspect->previous) {
+ struct origin *prev = suspect->previous;
+ printf("previous %s ", sha1_to_hex(prev->commit->object.sha1));
+ write_name_quoted(prev->path, stdout, '\n');
+ }
return 1;
}
@@ -1866,36 +1878,6 @@ static void sanity_check_refcnt(struct scoreboard *sb)
baa = 1;
}
}
- for (ent = sb->ent; ent; ent = ent->next) {
- /* Mark the ones that haven't been checked */
- if (0 < ent->suspect->refcnt)
- ent->suspect->refcnt = -ent->suspect->refcnt;
- }
- for (ent = sb->ent; ent; ent = ent->next) {
- /*
- * ... then pick each and see if they have the the
- * correct refcnt.
- */
- int found;
- struct blame_entry *e;
- struct origin *suspect = ent->suspect;
-
- if (0 < suspect->refcnt)
- continue;
- suspect->refcnt = -suspect->refcnt; /* Unmark */
- for (found = 0, e = sb->ent; e; e = e->next) {
- if (e->suspect != suspect)
- continue;
- found++;
- }
- if (suspect->refcnt != found) {
- fprintf(stderr, "%s in %s has refcnt %d, not %d\n",
- ent->suspect->path,
- sha1_to_hex(ent->suspect->commit->object.sha1),
- ent->suspect->refcnt, found);
- baa = 2;
- }
- }
if (baa) {
int opt = 0160;
find_alignment(sb, &opt);
--
1.5.6.rc1.12.g7f718
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