Commands using the merge_trees() machinery will present conflict hunks
in output something like what ‘diff3 -m’ produces if the
merge.conflictstyle configuration option is set to diff3.
Unfortunately, the format is not fully compatible yet. ‘diff3’
includes the name of the merge base on the ||||||| line of the output,
and tools can misparse the conflict hunks without it. Add a new
o->ancestor parameter to merge_trees() for use as a label for the
ancestor in conflict hunks to give callers the power to rectify this
situation.
If o->ancestor is NULL, the output format is as before. All callers
pass NULL, so this patch does not affect the outward behavior of git.
If o->ancestor is non-NULL and both branches renamed the base file
to the same name, that name is included in the conflict hunk labels.
Even if o->ancestor is NULL I think this would be a good change, but
this patch only does it in the non-NULL case to ensure the output
format does not change where it might matter.
Reported-by: Stefan Monnier <monnier@xxxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Nieder <jrnieder@xxxxxxxxx>
---
Another no-op.
merge-recursive.c | 11 ++++++++---
merge-recursive.h | 1 +
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/merge-recursive.c b/merge-recursive.c
index 3b2cc9d..017cafd 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -608,7 +608,7 @@ static int merge_3way(struct merge_options *o,
const char *branch2)
{
mmfile_t orig, src1, src2;
- char *name1, *name2;
+ char *base_name, *name1, *name2;
int merge_status;
int favor;
@@ -628,10 +628,15 @@ static int merge_3way(struct merge_options *o,
}
}
- if (strcmp(a->path, b->path)) {
+ if (strcmp(a->path, b->path) ||
+ (o->ancestor != NULL && strcmp(a->path, one->path) != 0)) {
+ base_name = o->ancestor == NULL ? NULL :
+ xstrdup(mkpath("%s:%s", o->ancestor, one->path));
name1 = xstrdup(mkpath("%s:%s", branch1, a->path));
name2 = xstrdup(mkpath("%s:%s", branch2, b->path));
} else {
+ base_name = o->ancestor == NULL ? NULL :
+ xstrdup(mkpath("%s", o->ancestor));
name1 = xstrdup(mkpath("%s", branch1));
name2 = xstrdup(mkpath("%s", branch2));
}
@@ -640,7 +645,7 @@ static int merge_3way(struct merge_options *o,
read_mmblob(&src1, a->sha1);
read_mmblob(&src2, b->sha1);
- merge_status = ll_merge(result_buf, a->path, &orig, NULL,
+ merge_status = ll_merge(result_buf, a->path, &orig, base_name,
&src1, name1, &src2, name2,
(!!o->call_depth) | (favor << 1));
diff --git a/merge-recursive.h b/merge-recursive.h
index be8410a..d1192f5 100644
--- a/merge-recursive.h
+++ b/merge-recursive.h
@@ -4,6 +4,7 @@
#include "string-list.h"
struct merge_options {
+ const char *ancestor;
const char *branch1;
const char *branch2;
enum {
--
1.7.0
--
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