Merge branch 'jk/diff-driver-binary-doc' into maint

diff --git a/t/t7607-merge-overwrite.sh b/t/t7607-merge-overwrite.sh
index 18e7ff5d3a38c8ee20b9850b89799fe77c867298..4d5ce4e682c1ea69034c3f7789a8ac0c89b12466 100755 (executable)
--- a/t/t7607-merge-overwrite.sh
+++ b/t/t7607-merge-overwrite.sh
@@ -12,6 +12,14 @@ test_expect_success 'setup' '
        test_commit c1a c1.c "c1 a" &&
        git reset --hard c0 &&
        test_commit c2 c2.c &&
+       git reset --hard c0 &&
+       mkdir sub &&
+       echo "sub/f" > sub/f &&
+       mkdir sub2 &&
+       echo "sub2/f" > sub2/f &&
+       git add sub/f sub2/f &&
+       git commit -m sub &&
+       git tag sub &&
        echo "VERY IMPORTANT CHANGES" > important
 '
 
@@ -23,6 +31,14 @@ test_expect_success 'will not overwrite untracked file' '
        test_cmp important c2.c
 '
 
+test_expect_success 'will overwrite tracked file' '
+       git reset --hard c1 &&
+       cp important c2.c &&
+       git add c2.c &&
+       git commit -m important &&
+       git checkout c2
+'
+
 test_expect_success 'will not overwrite new file' '
        git reset --hard c1 &&
        cp important c2.c &&
@@ -76,6 +92,54 @@ test_expect_success 'will not overwrite removed file with staged changes' '
        test_cmp important c1.c
 '
 
+test_expect_success 'will not overwrite untracked subtree' '
+       git reset --hard c0 &&
+       rm -rf sub &&
+       mkdir -p sub/f &&
+       cp important sub/f/important &&
+       test_must_fail git merge sub &&
+       test_path_is_missing .git/MERGE_HEAD &&
+       test_cmp important sub/f/important
+'
+
+cat >expect <<\EOF
+error: The following untracked working tree files would be overwritten by merge:
+       sub
+       sub2
+Please move or remove them before you can merge.
+EOF
+
+test_expect_success 'will not overwrite untracked file in leading path' '
+       git reset --hard c0 &&
+       rm -rf sub &&
+       cp important sub &&
+       cp important sub2 &&
+       test_must_fail git merge sub 2>out &&
+       test_cmp out expect &&
+       test_path_is_missing .git/MERGE_HEAD &&
+       test_cmp important sub &&
+       test_cmp important sub2 &&
+       rm -f sub sub2
+'
+
+test_expect_failure SYMLINKS 'will not overwrite untracked symlink in leading path' '
+       git reset --hard c0 &&
+       rm -rf sub &&
+       mkdir sub2 &&
+       ln -s sub2 sub &&
+       test_must_fail git merge sub &&
+       test_path_is_missing .git/MERGE_HEAD
+'
+
+test_expect_success SYMLINKS 'will not be confused by symlink in leading path' '
+       git reset --hard c0 &&
+       rm -rf sub &&
+       ln -s sub2 sub &&
+       git add sub &&
+       git commit -m ln &&
+       git checkout sub
+'
+
 cat >expect <<\EOF
 error: Untracked working tree file 'c0.c' would be overwritten by merge.
 fatal: read-tree failed