merge-one-file: fix broken merges with alternate work trees

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index ebfd34df36068f8808406a98d371731fb85012c4..d20ed61b481539b25c054c49bd82aa6fb9b3a981 100755 (executable)
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -166,19 +166,31 @@ test_expect_success 'checkout -m with merge conflict' '
        ! test -s current
 '
 
-test_expect_success 'checkout to detach HEAD' '
+test_expect_success 'checkout to detach HEAD (with advice declined)' '
 
+       git config advice.detachedHead false &&
        git checkout -f renamer && git clean -f &&
        git checkout renamer^ 2>messages &&
-       (cat >messages.expect <<EOF
-Note: moving to '\''renamer^'\'' which isn'\''t a local branch
-If you want to create a new branch from this checkout, you may do so
-(now or later) by using -b with the checkout command again. Example:
-  git checkout -b <new_branch_name>
-HEAD is now at 7329388... Initial A one, A two
-EOF
-) &&
-       test_cmp messages.expect messages &&
+       grep "HEAD is now at 7329388" messages &&
+       test 1 -eq $(wc -l <messages) &&
+       H=$(git rev-parse --verify HEAD) &&
+       M=$(git show-ref -s --verify refs/heads/master) &&
+       test "z$H" = "z$M" &&
+       if git symbolic-ref HEAD >/dev/null 2>&1
+       then
+               echo "OOPS, HEAD is still symbolic???"
+               false
+       else
+               : happy
+       fi
+'
+
+test_expect_success 'checkout to detach HEAD' '
+       git config advice.detachedHead true &&
+       git checkout -f renamer && git clean -f &&
+       git checkout renamer^ 2>messages &&
+       grep "HEAD is now at 7329388" messages &&
+       test 1 -lt $(wc -l <messages) &&
        H=$(git rev-parse --verify HEAD) &&
        M=$(git show-ref -s --verify refs/heads/master) &&
        test "z$H" = "z$M" &&
@@ -542,4 +554,61 @@ test_expect_success 'switch out of non-branch' '
        ! grep "^Previous HEAD" error.log
 '
 
+(
+ echo "#!$SHELL_PATH"
+ cat <<\EOF
+O=$1 A=$2 B=$3
+cat "$A" >.tmp
+exec >"$A"
+echo '<<<<<<< filfre-theirs'
+cat "$B"
+echo '||||||| filfre-common'
+cat "$O"
+echo '======='
+cat ".tmp"
+echo '>>>>>>> filfre-ours'
+rm -f .tmp
+exit 1
+EOF
+) >filfre.sh
+chmod +x filfre.sh
+
+test_expect_success 'custom merge driver with checkout -m' '
+       git reset --hard &&
+
+       git config merge.filfre.driver "./filfre.sh %O %A %B" &&
+       git config merge.filfre.name "Feel-free merge driver" &&
+       git config merge.filfre.recursive binary &&
+       echo "arm merge=filfre" >.gitattributes &&
+
+       git checkout -b left &&
+       echo neutral >arm &&
+       git add arm .gitattributes &&
+       test_tick &&
+       git commit -m neutral &&
+       git branch right &&
+
+       echo left >arm &&
+       test_tick &&
+       git commit -a -m left &&
+       git checkout right &&
+
+       echo right >arm &&
+       test_tick &&
+       git commit -a -m right &&
+
+       test_must_fail git merge left &&
+       (
+               for t in filfre-common left right
+               do
+                       grep $t arm || exit 1
+               done
+               exit 0
+       ) &&
+
+       mv arm expect &&
+       git checkout -m arm &&
+       test_cmp expect arm
+'
+
 test_done