[PATCH 3/6] ll-merge: let caller decide whether to renormalize

[Jonathan Nieder <jrnieder@gmail.com>]

Add a "renormalize" parameter to ll_merge so callers can decide on a
case-by-case basis whether the merge is likely to have overlapped with
a change in smudge/clean rules.  This reveals a few commands that have
not been taking that situation into account, though it does not fix
them.

No change in behavior intended.

Cc: Eyvind Bernhardsen <eyvind.bernhardsen@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
---
 builtin/checkout.c |    6 +++++-
 ll-merge.c         |    4 ++--
 ll-merge.h         |    2 +-
 merge-file.c       |    2 +-
 merge-recursive.c  |    1 +
 rerere.c           |   17 +++++++++++------
 6 files changed, 21 insertions(+), 11 deletions(-)

diff --git a/builtin/checkout.c b/builtin/checkout.c
index 1994be9..5a7ae03 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -150,8 +150,12 @@ static int checkout_merged(int pos, struct checkout *state)
 	read_mmblob(&ours, active_cache[pos+1]->sha1);
 	read_mmblob(&theirs, active_cache[pos+2]->sha1);
 
+	/*
+	 * NEEDSWORK: re-create conflicts from merges with
+	 * merge.renormalize set, too
+	 */
 	status = ll_merge(&result_buf, path, &ancestor, "base",
-			  &ours, "ours", &theirs, "theirs", 0);
+			  &ours, "ours", &theirs, "theirs", 0, 0);
 	free(ancestor.ptr);
 	free(ours.ptr);
 	free(theirs.ptr);
diff --git a/ll-merge.c b/ll-merge.c
index 5068fe0..0a0e04d 100644
--- a/ll-merge.c
+++ b/ll-merge.c
@@ -336,7 +336,7 @@ int ll_merge(mmbuffer_t *result_buf,
 	     mmfile_t *ancestor, const char *ancestor_label,
 	     mmfile_t *ours, const char *our_label,
 	     mmfile_t *theirs, const char *their_label,
-	     int flag)
+	     int renormalize, int flag)
 {
 	static struct git_attr_check check[2];
 	const char *ll_driver_name = NULL;
@@ -344,7 +344,7 @@ int ll_merge(mmbuffer_t *result_buf,
 	const struct ll_merge_driver *driver;
 	int virtual_ancestor = flag & 01;
 
-	if (merge_renormalize) {
+	if (renormalize) {
 		normalize_file(ancestor, path);
 		normalize_file(ours, path);
 		normalize_file(theirs, path);
diff --git a/ll-merge.h b/ll-merge.h
index 57754cc..dd81a1e 100644
--- a/ll-merge.h
+++ b/ll-merge.h
@@ -10,7 +10,7 @@ int ll_merge(mmbuffer_t *result_buf,
 	     mmfile_t *ancestor, const char *ancestor_label,
 	     mmfile_t *ours, const char *our_label,
 	     mmfile_t *theirs, const char *their_label,
-	     int flag);
+	     int renormalize, int flag);
 
 int ll_merge_marker_size(const char *path);
 
diff --git a/merge-file.c b/merge-file.c
index db4d0d5..5afdc01 100644
--- a/merge-file.c
+++ b/merge-file.c
@@ -37,7 +37,7 @@ static void *three_way_filemerge(const char *path, mmfile_t *base, mmfile_t *our
 	 * common ancestor.
 	 */
 	merge_status = ll_merge(&res, path, base, NULL,
-				our, ".our", their, ".their", 0);
+				our, ".our", their, ".their", 0, 0);
 	if (merge_status < 0)
 		return NULL;
 
diff --git a/merge-recursive.c b/merge-recursive.c
index 8a49844..4838939 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -647,6 +647,7 @@ static int merge_3way(struct merge_options *o,
 
 	merge_status = ll_merge(result_buf, a->path, &orig, base_name,
 				&src1, name1, &src2, name2,
+				o->renormalize,
 				(!!o->call_depth) | (favor << 1));
 
 	free(name1);
diff --git a/rerere.c b/rerere.c
index 2197890..17dcc3c 100644
--- a/rerere.c
+++ b/rerere.c
@@ -319,9 +319,13 @@ static int handle_cache(const char *path, unsigned char *sha1, const char *outpu
 		if (!mmfile[i].ptr && !mmfile[i].size)
 			mmfile[i].ptr = xstrdup("");
 	}
+	/*
+	 * NEEDSWORK: handle conflicts from merges with
+	 * merge.renormalize set, too
+	 */
 	ll_merge(&result, path, &mmfile[0], NULL,
 		 &mmfile[1], "ours",
-		 &mmfile[2], "theirs", 0);
+		 &mmfile[2], "theirs", 0, 0);
 	for (i = 0; i < 3; i++)
 		free(mmfile[i].ptr);
 
@@ -361,7 +365,7 @@ static int find_conflict(struct string_list *conflict)
 	return 0;
 }
 
-static int merge(const char *name, const char *path)
+static int merge(const char *name, int renormalize, const char *path)
 {
 	int ret;
 	mmfile_t cur = {NULL, 0}, base = {NULL, 0}, other = {NULL, 0};
@@ -376,7 +380,8 @@ static int merge(const char *name, const char *path)
 		ret = 1;
 		goto out;
 	}
-	ret = ll_merge(&result, path, &base, NULL, &cur, "", &other, "", 0);
+	ret = ll_merge(&result, path, &base, NULL,
+			&cur, "", &other, "", renormalize, 0);
 	if (!ret) {
 		FILE *f = fopen(path, "w");
 		if (!f)
@@ -424,7 +429,7 @@ static int update_paths(struct string_list *update)
 	return status;
 }
 
-static int do_plain_rerere(struct string_list *rr, int fd)
+static int do_plain_rerere(struct string_list *rr, int fd, int renormalize)
 {
 	struct string_list conflict = { NULL, 0, 0, 1 };
 	struct string_list update = { NULL, 0, 0, 1 };
@@ -469,7 +474,7 @@ static int do_plain_rerere(struct string_list *rr, int fd)
 		const char *name = (const char *)rr->items[i].util;
 
 		if (has_rerere_resolution(name)) {
-			if (!merge(name, path)) {
+			if (!merge(name, renormalize, path)) {
 				if (rerere_autoupdate)
 					string_list_insert(path, &update);
 				fprintf(stderr,
@@ -553,7 +558,7 @@ int rerere(int flags)
 	fd = setup_rerere(&merge_rr, flags);
 	if (fd < 0)
 		return 0;
-	return do_plain_rerere(&merge_rr, fd);
+	return do_plain_rerere(&merge_rr, fd, merge_renormalize);
 }
 
 static int rerere_forget_one_path(const char *path, struct string_list *rr)
-- 
1.7.2.1.544.ga752d.dirty