When file renames/copies detection is turned on, the
second diffcore_std will degrade a 'C' pair to a 'R' pair.
And this may happen when we run 'git log --follow' with
hard copies finding. That is, the try_to_follow_renames()
will run diffcore_std to find the copies, and then
'git log' will issue another diffcore_std, which will reduce
'src->rename_used' and recognize this copy as a rename.
This is not what we want.
So, I think we really don't need to run diffcore_std more
than one time.
Signed-off-by: Bo Yang <struggleyb.nku@xxxxxxxxx>
---
diff.c | 21 +++++++++++++--------
diffcore-break.c | 6 ++----
diffcore-pickaxe.c | 3 +--
diffcore-rename.c | 3 +--
diffcore.h | 6 ++++++
5 files changed, 23 insertions(+), 16 deletions(-)
diff --git a/diff.c b/diff.c
index d0ecbc3..d32fc68 100644
--- a/diff.c
+++ b/diff.c
@@ -2544,6 +2544,7 @@ static void run_checkdiff(struct diff_filepair *p, struct diff_options *o)
void diff_setup(struct diff_options *options)
{
memset(options, 0, sizeof(*options));
+ memset(&diff_queued_diff, 0, sizeof(diff_queued_diff));
options->file = stdout;
@@ -3462,8 +3463,7 @@ int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1)
diff_free_filepair(q->queue[i]);
free(q->queue);
- q->queue = NULL;
- q->nr = q->alloc = 0;
+ DIFF_QUEUE_CLEAR(q);
return result;
}
@@ -3591,8 +3591,7 @@ void diff_flush(struct diff_options *options)
diff_free_filepair(q->queue[i]);
free_queue:
free(q->queue);
- q->queue = NULL;
- q->nr = q->alloc = 0;
+ DIFF_QUEUE_CLEAR(q);
if (options->close_file)
fclose(options->file);
@@ -3614,8 +3613,7 @@ static void diffcore_apply_filter(const char *filter)
int i;
struct diff_queue_struct *q = &diff_queued_diff;
struct diff_queue_struct outq;
- outq.queue = NULL;
- outq.nr = outq.alloc = 0;
+ DIFF_QUEUE_CLEAR(&outq);
if (!filter)
return;
@@ -3683,8 +3681,7 @@ static void diffcore_skip_stat_unmatch(struct diff_options *diffopt)
int i;
struct diff_queue_struct *q = &diff_queued_diff;
struct diff_queue_struct outq;
- outq.queue = NULL;
- outq.nr = outq.alloc = 0;
+ DIFF_QUEUE_CLEAR(&outq);
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
@@ -3745,6 +3742,12 @@ void diffcore_fix_diff_index(struct diff_options *options)
void diffcore_std(struct diff_options *options)
{
+ /* We never run this function more than one time, because the
+ * rename/copy detection logic can only run once.
+ */
+ if (diff_queued_diff.run)
+ return;
+
if (options->skip_stat_unmatch)
diffcore_skip_stat_unmatch(options);
if (options->break_opt != -1)
@@ -3764,6 +3767,8 @@ void diffcore_std(struct diff_options *options)
DIFF_OPT_SET(options, HAS_CHANGES);
else
DIFF_OPT_CLR(options, HAS_CHANGES);
+
+ diff_queued_diff.run = 1;
}
int diff_result_code(struct diff_options *opt, int status)
diff --git a/diffcore-break.c b/diffcore-break.c
index 3a7b60a..44f8678 100644
--- a/diffcore-break.c
+++ b/diffcore-break.c
@@ -162,8 +162,7 @@ void diffcore_break(int break_score)
if (!merge_score)
merge_score = DEFAULT_MERGE_SCORE;
- outq.nr = outq.alloc = 0;
- outq.queue = NULL;
+ DIFF_QUEUE_CLEAR(&outq);
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
@@ -256,8 +255,7 @@ void diffcore_merge_broken(void)
struct diff_queue_struct outq;
int i, j;
- outq.nr = outq.alloc = 0;
- outq.queue = NULL;
+ DIFF_QUEUE_CLEAR(&outq);
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
diff --git a/diffcore-pickaxe.c b/diffcore-pickaxe.c
index d0ef839..929de15 100644
--- a/diffcore-pickaxe.c
+++ b/diffcore-pickaxe.c
@@ -55,8 +55,7 @@ void diffcore_pickaxe(const char *needle, int opts)
int i, has_changes;
regex_t regex, *regexp = NULL;
struct diff_queue_struct outq;
- outq.queue = NULL;
- outq.nr = outq.alloc = 0;
+ DIFF_QUEUE_CLEAR(&outq);
if (opts & DIFF_PICKAXE_REGEX) {
int err;
diff --git a/diffcore-rename.c b/diffcore-rename.c
index d6fd3ca..df41be5 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -569,8 +569,7 @@ void diffcore_rename(struct diff_options *options)
/* At this point, we have found some renames and copies and they
* are recorded in rename_dst. The original list is still in *q.
*/
- outq.queue = NULL;
- outq.nr = outq.alloc = 0;
+ DIFF_QUEUE_CLEAR(&outq);
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
struct diff_filepair *pair_to_free = NULL;
diff --git a/diffcore.h b/diffcore.h
index fcd00bf..e77db31 100644
--- a/diffcore.h
+++ b/diffcore.h
@@ -91,7 +91,13 @@ struct diff_queue_struct {
struct diff_filepair **queue;
int alloc;
int nr;
+ int run;
};
+#define DIFF_QUEUE_CLEAR(q) \
+ do { \
+ (q)->queue = NULL; \
+ (q)->nr = (q)->alloc = (q)->run = 0; \
+ } while(0);
extern struct diff_queue_struct diff_queued_diff;
extern struct diff_filepair *diff_queue(struct diff_queue_struct *,
--
1.7.0.2.273.gc2413.dirty
--
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