Merge branch 'nd/fix-untracked-cache-invalidation'

Some bugs around "untracked cache" feature have been fixed.

* nd/fix-untracked-cache-invalidation:
  dir.c: ignore paths containing .git when invalidating untracked cache
  dir.c: stop ignoring opendir() error in open_cached_dir()
  dir.c: fix missing dir invalidation in untracked code
  dir.c: avoid stat() in valid_cached_dir()
  status: add a failing test showing a core.untrackedCache bug

2 files changed, 126 insertions, 0 deletions

diff --git a/t/t7063-status-untracked-cache.sh b/t/t7063-status-untracked-cache.sh
index e5fb892f95..46b947824f 100755
--- a/t/t7063-status-untracked-cache.sh
+++ b/t/t7063-status-untracked-cache.sh
@@ -22,6 +22,12 @@ avoid_racy() {
 	sleep 1
 }
 
+status_is_clean() {
+	>../status.expect &&
+	git status --porcelain >../status.actual &&
+	test_cmp ../status.expect ../status.actual
+}
+
 test_lazy_prereq UNTRACKED_CACHE '
 	{ git update-index --test-untracked-cache; ret=$?; } &&
 	test $ret -ne 1
@@ -683,4 +689,85 @@ test_expect_success 'untracked cache survives a commit' '
 	test_cmp ../before ../after
 '
 
+test_expect_success 'teardown worktree' '
+	cd ..
+'
+
+test_expect_success SYMLINKS 'setup worktree for symlink test' '
+	git init worktree-symlink &&
+	cd worktree-symlink &&
+	git config core.untrackedCache true &&
+	mkdir one two &&
+	touch one/file two/file &&
+	git add one/file two/file &&
+	git commit -m"first commit" &&
+	git rm -rf one &&
+	ln -s two one &&
+	git add one &&
+	git commit -m"second commit"
+'
+
+test_expect_success SYMLINKS '"status" after symlink replacement should be clean with UC=true' '
+	git checkout HEAD~ &&
+	status_is_clean &&
+	status_is_clean &&
+	git checkout master &&
+	avoid_racy &&
+	status_is_clean &&
+	status_is_clean
+'
+
+test_expect_success SYMLINKS '"status" after symlink replacement should be clean with UC=false' '
+	git config core.untrackedCache false &&
+	git checkout HEAD~ &&
+	status_is_clean &&
+	status_is_clean &&
+	git checkout master &&
+	avoid_racy &&
+	status_is_clean &&
+	status_is_clean
+'
+
+test_expect_success 'setup worktree for non-symlink test' '
+	git init worktree-non-symlink &&
+	cd worktree-non-symlink &&
+	git config core.untrackedCache true &&
+	mkdir one two &&
+	touch one/file two/file &&
+	git add one/file two/file &&
+	git commit -m"first commit" &&
+	git rm -rf one &&
+	cp two/file one &&
+	git add one &&
+	git commit -m"second commit"
+'
+
+test_expect_success '"status" after file replacement should be clean with UC=true' '
+	git checkout HEAD~ &&
+	status_is_clean &&
+	status_is_clean &&
+	git checkout master &&
+	avoid_racy &&
+	status_is_clean &&
+	test-dump-untracked-cache >../actual &&
+	grep -F "recurse valid" ../actual >../actual.grep &&
+	cat >../expect.grep <<EOF &&
+/ 0000000000000000000000000000000000000000 recurse valid
+/two/ 0000000000000000000000000000000000000000 recurse valid
+EOF
+	status_is_clean &&
+	test_cmp ../expect.grep ../actual.grep
+'
+
+test_expect_success '"status" after file replacement should be clean with UC=false' '
+	git config core.untrackedCache false &&
+	git checkout HEAD~ &&
+	status_is_clean &&
+	status_is_clean &&
+	git checkout master &&
+	avoid_racy &&
+	status_is_clean &&
+	status_is_clean
+'
+
 test_done
diff --git a/t/t7519-status-fsmonitor.sh b/t/t7519-status-fsmonitor.sh
index eb2d13bbcf..756beb0d8e 100755
--- a/t/t7519-status-fsmonitor.sh
+++ b/t/t7519-status-fsmonitor.sh
@@ -314,4 +314,43 @@ test_expect_success 'splitting the index results in the same state' '
 	test_cmp expect actual
 '
 
+test_expect_success UNTRACKED_CACHE 'ignore .git changes when invalidating UNTR' '
+	test_create_repo dot-git &&
+	(
+		cd dot-git &&
+		mkdir -p .git/hooks &&
+		: >tracked &&
+		: >modified &&
+		mkdir dir1 &&
+		: >dir1/tracked &&
+		: >dir1/modified &&
+		mkdir dir2 &&
+		: >dir2/tracked &&
+		: >dir2/modified &&
+		write_integration_script &&
+		git config core.fsmonitor .git/hooks/fsmonitor-test &&
+		git update-index --untracked-cache &&
+		git update-index --fsmonitor &&
+		GIT_TRACE_UNTRACKED_STATS="$TRASH_DIRECTORY/trace-before" \
+		git status &&
+		test-dump-untracked-cache >../before
+	) &&
+	cat >>dot-git/.git/hooks/fsmonitor-test <<-\EOF &&
+	printf ".git\0"
+	printf ".git/index\0"
+	printf "dir1/.git\0"
+	printf "dir1/.git/index\0"
+	EOF
+	(
+		cd dot-git &&
+		GIT_TRACE_UNTRACKED_STATS="$TRASH_DIRECTORY/trace-after" \
+		git status &&
+		test-dump-untracked-cache >../after
+	) &&
+	grep "directory invalidation" trace-before >>before &&
+	grep "directory invalidation" trace-after >>after &&
+	# UNTR extension unchanged, dir invalidation count unchanged
+	test_cmp before after
+'
+
 test_done