Sync with 2.23.4

* maint-2.23:
  Git 2.23.4
  Git 2.22.5
  Git 2.21.4
  Git 2.20.5
  Git 2.19.6
  Git 2.18.5
  Git 2.17.6
  unpack_trees(): start with a fresh lstat cache
  run-command: invalidate lstat cache after a command finished
  checkout: fix bug that makes checkout follow symlinks in leading path

1 files changed, 81 insertions, 0 deletions

diff --git a/t/t0021-conversion.sh b/t/t0021-conversion.sh
index c954c709ad..0558068f4d 100755
--- a/t/t0021-conversion.sh
+++ b/t/t0021-conversion.sh
@@ -820,4 +820,85 @@ test_expect_success PERL 'invalid file in delayed checkout' '
 	grep "error: external filter .* signaled that .unfiltered. is now available although it has not been delayed earlier" git-stderr.log
 '
 
+for mode in 'case' 'utf-8'
+do
+	case "$mode" in
+	case)	dir='A' symlink='a' mode_prereq='CASE_INSENSITIVE_FS' ;;
+	utf-8)
+		dir=$(printf "\141\314\210") symlink=$(printf "\303\244")
+		mode_prereq='UTF8_NFD_TO_NFC' ;;
+	esac
+
+	test_expect_success PERL,SYMLINKS,$mode_prereq \
+	"delayed checkout with $mode-collision don't write to the wrong place" '
+		test_config_global filter.delay.process \
+			"\"$TEST_ROOT/rot13-filter.pl\" --always-delay delayed.log clean smudge delay" &&
+		test_config_global filter.delay.required true &&
+
+		git init $mode-collision &&
+		(
+			cd $mode-collision &&
+			mkdir target-dir &&
+
+			empty_oid=$(printf "" | git hash-object -w --stdin) &&
+			symlink_oid=$(printf "%s" "$PWD/target-dir" | git hash-object -w --stdin) &&
+			attr_oid=$(echo "$dir/z filter=delay" | git hash-object -w --stdin) &&
+
+			cat >objs <<-EOF &&
+			100644 blob $empty_oid	$dir/x
+			100644 blob $empty_oid	$dir/y
+			100644 blob $empty_oid	$dir/z
+			120000 blob $symlink_oid	$symlink
+			100644 blob $attr_oid	.gitattributes
+			EOF
+
+			git update-index --index-info <objs &&
+			git commit -m "test commit"
+		) &&
+
+		git clone $mode-collision $mode-collision-cloned &&
+		# Make sure z was really delayed
+		grep "IN: smudge $dir/z .* \\[DELAYED\\]" $mode-collision-cloned/delayed.log &&
+
+		# Should not create $dir/z at $symlink/z
+		test_path_is_missing $mode-collision/target-dir/z
+	'
+done
+
+test_expect_success PERL,SYMLINKS,CASE_INSENSITIVE_FS \
+"delayed checkout with submodule collision don't write to the wrong place" '
+	git init collision-with-submodule &&
+	(
+		cd collision-with-submodule &&
+		git config filter.delay.process "\"$TEST_ROOT/rot13-filter.pl\" --always-delay delayed.log clean smudge delay" &&
+		git config filter.delay.required true &&
+
+		# We need Git to treat the submodule "a" and the
+		# leading dir "A" as different paths in the index.
+		git config --local core.ignoreCase false &&
+
+		empty_oid=$(printf "" | git hash-object -w --stdin) &&
+		attr_oid=$(echo "A/B/y filter=delay" | git hash-object -w --stdin) &&
+		cat >objs <<-EOF &&
+		100644 blob $empty_oid	A/B/x
+		100644 blob $empty_oid	A/B/y
+		100644 blob $attr_oid	.gitattributes
+		EOF
+		git update-index --index-info <objs &&
+
+		git init a &&
+		mkdir target-dir &&
+		symlink_oid=$(printf "%s" "$PWD/target-dir" | git -C a hash-object -w --stdin) &&
+		echo "120000 blob $symlink_oid	b" >objs &&
+		git -C a update-index --index-info <objs &&
+		git -C a commit -m sub &&
+		git submodule add ./a &&
+		git commit -m super &&
+
+		git checkout --recurse-submodules . &&
+		grep "IN: smudge A/B/y .* \\[DELAYED\\]" delayed.log &&
+		test_path_is_missing target-dir/y
+	)
+'
+
 test_done