The code for rename_rename_2to1 conflicts (two files both being renamed to
the same filename) was dead since the rename/add path was always being
independently triggered for each of the renames instead. Further,
reviving the dead code showed that it was inherently buggy and would
always segfault -- among a few other bugs.
Move the else-if branch for the rename/rename block before the rename/add
block to make sure it is checked first, and fix up the rename/rename(2to1)
code segments to make it handle most cases. Work is still needed to
handle higher dimensional corner cases such as rename/rename/modify/modify
issues.
Signed-off-by: Elijah Newren <newren@xxxxxxxxx>
---
merge-recursive.c | 70 +++++++++++++++++++++++++-----------
t/t6036-recursive-corner-cases.sh | 17 +++++----
2 files changed, 57 insertions(+), 30 deletions(-)
diff --git a/merge-recursive.c b/merge-recursive.c
index 749e501..4c42838 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -983,17 +983,36 @@ static void conflict_rename_rename_2to1(struct merge_options *o,
struct rename *ren2,
const char *branch2)
{
+ char *path = ren1->pair->two->path; /* same as ren2->pair->two->path */
/* Two files were renamed to the same thing. */
- char *new_path1 = unique_path(o, ren1->pair->two->path, branch1);
- char *new_path2 = unique_path(o, ren2->pair->two->path, branch2);
- output(o, 1, "Renaming %s to %s and %s to %s instead",
- ren1->pair->one->path, new_path1,
- ren2->pair->one->path, new_path2);
- remove_file(o, 0, ren1->pair->two->path, 0);
- update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, new_path1);
- update_file(o, 0, ren2->pair->two->sha1, ren2->pair->two->mode, new_path2);
- free(new_path2);
- free(new_path1);
+ if (o->call_depth) {
+ struct merge_file_info mfi;
+ struct diff_filespec one, a, b;
+
+ one.path = a.path = b.path = path;
+ hashcpy(one.sha1, null_sha1);
+ one.mode = 0;
+ hashcpy(a.sha1, ren1->pair->two->sha1);
+ a.mode = ren1->pair->two->mode;
+ hashcpy(b.sha1, ren2->pair->two->sha1);
+ b.mode = ren2->pair->two->mode;
+ mfi = merge_file(o, &one, &a, &b, branch1, branch2);
+ output(o, 1, "Adding merged %s", path);
+ update_file(o, 0, mfi.sha, mfi.mode, path);
+ } else {
+ char *new_path1 = unique_path(o, path, branch1);
+ char *new_path2 = unique_path(o, path, branch2);
+ output(o, 1, "Renaming %s to %s and %s to %s instead",
+ ren1->pair->one->path, new_path1,
+ ren2->pair->one->path, new_path2);
+ remove_file(o, 0, path, 0);
+ update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode,
+ new_path1);
+ update_file(o, 0, ren2->pair->two->sha1, ren2->pair->two->mode,
+ new_path2);
+ free(new_path2);
+ free(new_path1);
+ }
}
static int process_renames(struct merge_options *o,
@@ -1008,12 +1027,12 @@ static int process_renames(struct merge_options *o,
for (i = 0; i < a_renames->nr; i++) {
sre = a_renames->items[i].util;
string_list_insert(&a_by_dst, sre->pair->two->path)->util
- = sre->dst_entry;
+ = (void*)sre;
}
for (i = 0; i < b_renames->nr; i++) {
sre = b_renames->items[i].util;
string_list_insert(&b_by_dst, sre->pair->two->path)->util
- = sre->dst_entry;
+ = (void*)sre;
}
for (i = 0, j = 0; i < a_renames->nr || j < b_renames->nr;) {
@@ -1125,6 +1144,23 @@ static int process_renames(struct merge_options *o,
clean_merge = 0;
conflict_rename_delete(o, ren1->pair, branch1, branch2);
}
+ } else if ((item = string_list_lookup(renames2Dst, ren1_dst))) {
+ char *ren2_src, *ren2_dst;
+ ren2 = item->util;
+ ren2_src = ren2->pair->one->path;
+ ren2_dst = ren2->pair->two->path;
+
+ clean_merge = 0;
+ ren2->processed = 1;
+ remove_file(o, 1, ren2_src,
+ renamed_stage == 3 || would_lose_untracked(ren1_src));
+
+ output(o, 1, "CONFLICT (rename/rename): "
+ "Rename %s->%s in %s. "
+ "Rename %s->%s in %s",
+ ren1_src, ren1_dst, branch1,
+ ren2_src, ren2_dst, branch2);
+ conflict_rename_rename_2to1(o, ren1, branch1, ren2, branch2);
} else if ((dst_other.mode == ren1->pair->two->mode) &&
sha_eq(dst_other.sha1, ren1->pair->two->sha1)) {
/* Added file on the other side
@@ -1165,16 +1201,6 @@ static int process_renames(struct merge_options *o,
update_file(o, 0, dst_other.sha1, dst_other.mode, new_path);
free(new_path);
}
- } else if ((item = string_list_lookup(renames2Dst, ren1_dst))) {
- ren2 = item->util;
- clean_merge = 0;
- ren2->processed = 1;
- output(o, 1, "CONFLICT (rename/rename): "
- "Rename %s->%s in %s. "
- "Rename %s->%s in %s",
- ren1_src, ren1_dst, branch1,
- ren2->pair->one->path, ren2->pair->two->path, branch2);
- conflict_rename_rename_2to1(o, ren1, branch1, ren2, branch2);
} else
try_merge = 1;
diff --git a/t/t6036-recursive-corner-cases.sh b/t/t6036-recursive-corner-cases.sh
index dea2a65..8d1d303 100755
--- a/t/t6036-recursive-corner-cases.sh
+++ b/t/t6036-recursive-corner-cases.sh
@@ -60,13 +60,13 @@ test_expect_success 'merge simple rename+criss-cross with no modifications' '
test $(git rev-parse :2:three) = $(git rev-parse L2:three) &&
test $(git rev-parse :3:three) = $(git rev-parse R2:three) &&
- cp two merged &&
+ cp one merged &&
>empty &&
test_must_fail git merge-file \
- -L "Temporary merge branch 2" \
- -L "" \
-L "Temporary merge branch 1" \
- merged empty one &&
+ -L "" \
+ -L "Temporary merge branch 2" \
+ merged empty two &&
test $(git rev-parse :1:three) = $(git hash-object merged)
'
@@ -139,11 +139,12 @@ test_expect_success 'merge criss-cross + rename merges with basic modification'
cp one merge-me &&
>empty &&
test_must_fail git merge-file \
- -L "Temporary merge branch 2" \
- -L "" \
-L "Temporary merge branch 1" \
- merged empty merge-me &&
- test $(git rev-parse :1:three) = $(git hash-object merged)
+ -L "" \
+ -L "Temporary merge branch 2" \
+ merge-me empty merged &&
+
+ test $(git rev-parse :1:three) = $(git hash-object merge-me)
'
#
--
1.7.6.rc0.62.g2d69f
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