Junio C Hamano <[email protected]> writes:

>> Place the contents from SQUASH_MSG at the beginning, just like we
>> show the commit log skeleton first when concluding a normal merge,
>> and then show the "# Conflicts:" list, to help the user write the
>> log message for the resulting commit.
>>
>> Signed-off-by: Sven Strickroth <[email protected]>
>> ---
>>  builtin/commit.c | 11 ++++++++++-
>>  1 file changed, 10 insertions(+), 1 deletion(-)
>
> The updated code looks good to me; sorry for misleading you with
> fuzzy comments earlier.
>
> We may want to have a test to prevent this from getting broken in
> the future updates.

Perhaps like so:

 t/t7600-merge.sh | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/t/t7600-merge.sh b/t/t7600-merge.sh
index 75c50ee..55b9da4 100755
--- a/t/t7600-merge.sh
+++ b/t/t7600-merge.sh
@@ -33,9 +33,11 @@ printf '%s\n' 1 2 3 4 5 6 7 8 9 >file
 printf '%s\n' '1 X' 2 3 4 5 6 7 8 9 >file.1
 printf '%s\n' 1 2 3 4 '5 X' 6 7 8 9 >file.5
 printf '%s\n' 1 2 3 4 5 6 7 8 '9 X' >file.9
+printf '%s\n' 1 2 3 4 5 6 7 8 '9 Y' >file.9y
 printf '%s\n' '1 X' 2 3 4 5 6 7 8 9 >result.1
 printf '%s\n' '1 X' 2 3 4 '5 X' 6 7 8 9 >result.1-5
 printf '%s\n' '1 X' 2 3 4 '5 X' 6 7 8 '9 X' >result.1-5-9
+printf '%s\n' 1 2 3 4 5 6 7 8 '9 Z' >result.9z
 >empty
 
 create_merge_msgs () {
@@ -128,6 +130,12 @@ test_expect_success 'setup' '
        git tag c2 &&
        c2=$(git rev-parse HEAD) &&
        git reset --hard "$c0" &&
+       cp file.9y file &&
+       git add file &&
+       test_tick &&
+       git commit -m "commit 7" &&
+       git tag c7 &&
+       git reset --hard "$c0" &&
        cp file.9 file &&
        git add file &&
        test_tick &&
@@ -218,6 +226,26 @@ test_expect_success 'merge c1 with c2' '
        verify_parents $c1 $c2
 '
 
+test_expect_success 'merge --squash c3 with c7' '
+       git reset --hard c3 &&
+       test_must_fail git merge --squash c7 &&
+       cat result.9z >file &&
+       git commit --no-edit -a &&
+
+       {
+               cat <<-EOF
+               Squashed commit of the following:
+
+               $(git show -s c7)
+
+               # Conflicts:
+               #       file
+               EOF
+       } >expect &&
+       git cat-file commit HEAD | sed -e '1,/^$/d' >actual &&
+       test_cmp expect actual
+'
+
 test_debug 'git log --graph --decorate --oneline --all'
 
 test_expect_success 'merge c1 with c2 and c3' '
-- 
2.8.0-rc2-154-gd146b22

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