Reviewed-by: Stefan Beller <sbel...@google.com>
Signed-off-by: Elijah Newren <new...@gmail.com>
Signed-off-by: Junio C Hamano <gits...@pobox.com>
---
 merge-recursive.c                   | 25 ++++++++++++++++++++++---
 t/t6043-merge-rename-directories.sh |  8 ++++----
 2 files changed, 26 insertions(+), 7 deletions(-)

diff --git a/merge-recursive.c b/merge-recursive.c
index 7fdcba4f22..238711b038 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -1324,11 +1324,22 @@ static int handle_file(struct merge_options *o,
 
        add = filespec_from_entry(&other, dst_entry, stage ^ 1);
        if (add) {
+               int ren_src_was_dirty = was_dirty(o, rename->path);
                char *add_name = unique_path(o, rename->path, other_branch);
                if (update_file(o, 0, &add->oid, add->mode, add_name))
                        return -1;
 
-               remove_file(o, 0, rename->path, 0);
+               if (ren_src_was_dirty) {
+                       output(o, 1, _("Refusing to lose dirty file at %s"),
+                              rename->path);
+               }
+               /*
+                * Because the double negatives somehow keep confusing me...
+                *    1) update_wd iff !ren_src_was_dirty.
+                *    2) no_wd iff !update_wd
+                *    3) so, no_wd == !!ren_src_was_dirty == ren_src_was_dirty
+                */
+               remove_file(o, 0, rename->path, ren_src_was_dirty);
                dst_name = unique_path(o, rename->path, cur_branch);
        } else {
                if (dir_in_way(rename->path, !o->call_depth, 0)) {
@@ -1466,7 +1477,10 @@ static int conflict_rename_rename_2to1(struct 
merge_options *o,
                char *new_path2 = unique_path(o, path, ci->branch2);
                output(o, 1, _("Renaming %s to %s and %s to %s instead"),
                       a->path, new_path1, b->path, new_path2);
-               if (would_lose_untracked(path))
+               if (was_dirty(o, path))
+                       output(o, 1, _("Refusing to lose dirty file at %s"),
+                              path);
+               else if (would_lose_untracked(path))
                        /*
                         * Only way we get here is if both renames were from
                         * a directory rename AND user had an untracked file
@@ -2075,6 +2089,7 @@ static void apply_directory_rename_modifications(struct 
merge_options *o,
 {
        struct string_list_item *item;
        int stage = (tree == a_tree ? 2 : 3);
+       int update_wd;
 
        /*
         * In all cases where we can do directory rename detection,
@@ -2085,7 +2100,11 @@ static void apply_directory_rename_modifications(struct 
merge_options *o,
         * saying the file would have been overwritten), but it might
         * be dirty, though.
         */
-       remove_file(o, 1, pair->two->path, 0 /* no_wd */);
+       update_wd = !was_dirty(o, pair->two->path);
+       if (!update_wd)
+               output(o, 1, _("Refusing to lose dirty file at %s"),
+                      pair->two->path);
+       remove_file(o, 1, pair->two->path, !update_wd);
 
        /* Find or create a new re->dst_entry */
        item = string_list_lookup(entries, new_path);
diff --git a/t/t6043-merge-rename-directories.sh 
b/t/t6043-merge-rename-directories.sh
index b94ba066fe..33e2649824 100755
--- a/t/t6043-merge-rename-directories.sh
+++ b/t/t6043-merge-rename-directories.sh
@@ -3370,7 +3370,7 @@ test_expect_success '11b-setup: Avoid losing dirty file 
involved in directory re
        )
 '
 
-test_expect_failure '11b-check: Avoid losing dirty file involved in directory 
rename' '
+test_expect_success '11b-check: Avoid losing dirty file involved in directory 
rename' '
        (
                cd 11b &&
 
@@ -3512,7 +3512,7 @@ test_expect_success '11d-setup: Avoid losing not-uptodate 
with rename + D/F conf
        )
 '
 
-test_expect_failure '11d-check: Avoid losing not-uptodate with rename + D/F 
conflict' '
+test_expect_success '11d-check: Avoid losing not-uptodate with rename + D/F 
conflict' '
        (
                cd 11d &&
 
@@ -3591,7 +3591,7 @@ test_expect_success '11e-setup: Avoid deleting 
not-uptodate with dir rename/rena
        )
 '
 
-test_expect_failure '11e-check: Avoid deleting not-uptodate with dir 
rename/rename(1to2)/add' '
+test_expect_success '11e-check: Avoid deleting not-uptodate with dir 
rename/rename(1to2)/add' '
        (
                cd 11e &&
 
@@ -3667,7 +3667,7 @@ test_expect_success '11f-setup: Avoid deleting 
not-uptodate with dir rename/rena
        )
 '
 
-test_expect_failure '11f-check: Avoid deleting not-uptodate with dir 
rename/rename(2to1)' '
+test_expect_success '11f-check: Avoid deleting not-uptodate with dir 
rename/rename(2to1)' '
        (
                cd 11f &&
 
-- 
2.17.0.290.ge988e9ce2a

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