Ensure global gitignore file is not loaded in tests

kittens/choose_files/scan.go

@@ -82,14 +82,14 @@ type FileSystemScanner struct {
 	err                     error
 }
 
-func NewFileSystemScanner(root_dir string, notify chan bool, filter_func func(string) bool) (fss *FileSystemScanner) {
+func new_filesystem_scanner(root_dir string, notify chan bool, filter_func func(string) bool) (fss *FileSystemScanner) {
 	ans := &FileSystemScanner{root_dir: root_dir, listeners: []chan bool{notify}, collection: NewResultCollection(4096)}
 	ans.in_progress.Store(true)
 	ans.keep_going.Store(true)
 	ans.dir_reader = os.ReadDir
 	ans.file_reader = os.ReadFile
 	ans.filter_func = utils.IfElse(filter_func == nil, accept_all, filter_func)
-	ans.global_gitignore = ignorefiles.GlobalGitignore()
+	ans.global_gitignore = ignorefiles.NewGitignore()
 	return ans
 }
 
@@ -324,7 +324,7 @@ func (fss *FileSystemScanner) worker() {
 			sortable = append(sortable, &arena[i])
 		}
 		if has_dot_git {
-			if fss.global_gitignore != nil {
+			if fss.global_gitignore.Len() > 0 {
 				add_ignore_file_from_impl(fss.global_gitignore)
 			}
 			add_ignore_file(filepath.Join(dot_git, "info", "exclude"))
@@ -392,6 +392,8 @@ type FileSystemScorer struct {
 	current_worker_wait     *sync.WaitGroup
 	scorer                  *fzf.FuzzyMatcher
 	dir_reader              func(path string) ([]fs.DirEntry, error)
+	file_reader             func(path string) ([]byte, error)
+	global_gitignore        ignorefiles.IgnoreFile
 }
 
 func NewFileSystemScorer(root_dir, query string, filter Filter, only_dirs bool, on_results func(error, bool)) (ans *FileSystemScorer) {
@@ -409,10 +411,18 @@ func (fss *FileSystemScorer) Start() {
 	fss.is_complete.Store(false)
 	fss.keep_going.Store(true)
 	if fss.scanner == nil {
-		sc := NewFileSystemScanner(fss.root_dir, on_results, fss.filter.Match)
+		sc := new_filesystem_scanner(fss.root_dir, on_results, fss.filter.Match)
 		if fss.dir_reader != nil {
 			sc.dir_reader = fss.dir_reader
 		}
+		if fss.file_reader != nil {
+			sc.file_reader = fss.file_reader
+		}
+		if fss.global_gitignore != nil {
+			sc.global_gitignore = fss.global_gitignore
+		} else {
+			sc.global_gitignore = ignorefiles.GlobalGitignore()
+		}
 		fss.scanner = sc
 		fss.scanner.Start()
 	} else {

kittens/choose_files/scan_test.go

@@ -12,6 +12,7 @@ import (
 	"time"
 
 	"github.com/google/go-cmp/cmp"
+	"github.com/kovidgoyal/kitty/tools/ignorefiles"
 	"github.com/kovidgoyal/kitty/tools/utils"
 )
 
@@ -163,6 +164,7 @@ func TestChooseFilesScoring(t *testing.T) {
 		}
 	})
 	s.dir_reader = root.ReadDir
+	s.global_gitignore = ignorefiles.NewGitignore()
 	s.Start()
 	wg.Wait()
 	results := func() (ans []string) {
@@ -309,6 +311,7 @@ func run_scoring(b *testing.B, depth, breadth int, query string) {
 			}
 		})
 		s.dir_reader = root.ReadDir
+		s.global_gitignore = ignorefiles.NewGitignore()
 		b.StartTimer()
 		s.scanner.Start()
 		s.Start()

tools/ignorefiles/api.go

@@ -10,6 +10,7 @@ import (
 var _ = fmt.Print
 
 type IgnoreFile interface {
+	Len() int // number of rules
 	LoadString(string) error
 	LoadBytes([]byte) error
 	LoadLines(...string) error

tools/ignorefiles/gitignore.go

@@ -29,6 +29,8 @@ type Gitignore struct {
 	line_number_offset         int
 }
 
+func (g Gitignore) Len() int { return len(g.patterns) }
+
 func (g Gitignore) IsIgnored(relpath string, ftype os.FileMode) (is_ignored bool, linenum_of_matching_rule int, pattern string) {
 	if os.PathSeparator != '/' {
 		relpath = strings.ReplaceAll(relpath, string(os.PathSeparator), "/")