X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=diffcore-rename.c;h=57a74b6bb83e14af5f7336f397f79fbfcdc8b5f7;hb=747fa12cef73b6ca04fffaddaad7326cf546cdea;hp=e99269872026c7f08e729acb6ffba7ef3c9c8fd8;hpb=f0c979f4dbbb7d6d9565d945c540f0a5748f1b80;p=git.git

diff --git a/diffcore-rename.c b/diffcore-rename.c
index e99269872..57a74b6bb 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -54,12 +54,14 @@ static struct diff_rename_dst *locate_rename_dst(struct diff_filespec *two,
 /* Table of rename/copy src files */
 static struct diff_rename_src {
 	struct diff_filespec *one;
+	unsigned short score; /* to remember the break score */
 	unsigned src_path_left : 1;
 } *rename_src;
 static int rename_src_nr, rename_src_alloc;
 
 static struct diff_rename_src *register_rename_src(struct diff_filespec *one,
-						   int src_path_left)
+						   int src_path_left,
+						   unsigned short score)
 {
 	int first, last;
 
@@ -89,15 +91,20 @@ static struct diff_rename_src *register_rename_src(struct diff_filespec *one,
 		memmove(rename_src + first + 1, rename_src + first,
 			(rename_src_nr - first - 1) * sizeof(*rename_src));
 	rename_src[first].one = one;
+	rename_src[first].score = score;
 	rename_src[first].src_path_left = src_path_left;
 	return &(rename_src[first]);
 }
 
-static int is_exact_match(struct diff_filespec *src, struct diff_filespec *dst)
+static int is_exact_match(struct diff_filespec *src,
+			  struct diff_filespec *dst,
+			  int contents_too)
 {
 	if (src->sha1_valid && dst->sha1_valid &&
-	    !memcmp(src->sha1, dst->sha1, 20))
+	    !hashcmp(src->sha1, dst->sha1))
 		return 1;
+	if (!contents_too)
+		return 0;
 	if (diff_populate_filespec(src, 1) || diff_populate_filespec(dst, 1))
 		return 0;
 	if (src->size != dst->size)
@@ -198,7 +205,11 @@ static void record_rename_pair(int dst_index, int src_index, int score)
 	fill_filespec(two, dst->sha1, dst->mode);
 
 	dp = diff_queue(NULL, one, two);
-	dp->score = score;
+	dp->renamed_pair = 1;
+	if (!strcmp(src->path, dst->path))
+		dp->score = rename_src[src_index].score;
+	else
+		dp->score = score;
 	dp->source_stays = rename_src[src_index].src_path_left;
 	rename_dst[dst_index].pair = dp;
 }
@@ -236,7 +247,7 @@ void diffcore_rename(struct diff_options *options)
 	struct diff_queue_struct *q = &diff_queued_diff;
 	struct diff_queue_struct outq;
 	struct diff_score *mx;
-	int i, j, rename_count;
+	int i, j, rename_count, contents_too;
 	int num_create, num_src, dst_cnt;
 
 	if (!minimum_score)
@@ -245,21 +256,25 @@ void diffcore_rename(struct diff_options *options)
 
 	for (i = 0; i < q->nr; i++) {
 		struct diff_filepair *p = q->queue[i];
-		if (!DIFF_FILE_VALID(p->one))
+		if (!DIFF_FILE_VALID(p->one)) {
 			if (!DIFF_FILE_VALID(p->two))
 				continue; /* unmerged */
+			else if (options->single_follow &&
+				 strcmp(options->single_follow, p->two->path))
+				continue; /* not interested */
 			else
 				locate_rename_dst(p->two, 1);
+		}
 		else if (!DIFF_FILE_VALID(p->two)) {
 			/* If the source is a broken "delete", and
 			 * they did not really want to get broken,
 			 * that means the source actually stays.
 			 */
 			int stays = (p->broken_pair && !p->score);
-			register_rename_src(p->one, stays);
+			register_rename_src(p->one, stays, p->score);
 		}
 		else if (detect_rename == DIFF_DETECT_COPY)
-			register_rename_src(p->one, 1);
+			register_rename_src(p->one, 1, p->score);
 	}
 	if (rename_dst_nr == 0 || rename_src_nr == 0 ||
 	    (0 < rename_limit && rename_limit < rename_dst_nr))
@@ -267,16 +282,23 @@ void diffcore_rename(struct diff_options *options)
 
 	/* We really want to cull the candidates list early
 	 * with cheap tests in order to avoid doing deltas.
+	 * The first round matches up the up-to-date entries,
+	 * and then during the second round we try to match
+	 * cache-dirty entries as well.
 	 */
-	for (i = 0; i < rename_dst_nr; i++) {
-		struct diff_filespec *two = rename_dst[i].two;
-		for (j = 0; j < rename_src_nr; j++) {
-			struct diff_filespec *one = rename_src[j].one;
-			if (!is_exact_match(one, two))
-				continue;
-			record_rename_pair(i, j, MAX_SCORE);
-			rename_count++;
-			break; /* we are done with this entry */
+	for (contents_too = 0; contents_too < 2; contents_too++) {
+		for (i = 0; i < rename_dst_nr; i++) {
+			struct diff_filespec *two = rename_dst[i].two;
+			if (rename_dst[i].pair)
+				continue; /* dealt with an earlier round */
+			for (j = 0; j < rename_src_nr; j++) {
+				struct diff_filespec *one = rename_src[j].one;
+				if (!is_exact_match(one, two, contents_too))
+					continue;
+				record_rename_pair(i, j, MAX_SCORE);
+				rename_count++;
+				break; /* we are done with this entry */
+			}
 		}
 	}