Use git ls-files to list all file suggestions

pkg/commands/git_commands/working_tree.go

@@ -451,3 +451,19 @@ func (self *WorkingTreeCommands) MergeFileForObjectIDs(strategy string, oursID s
 
 	return self.cmd.New(cmdArgs).RunWithOutput()
 }
+
+// Returns all tracked files in the repo (not in the working tree). The returned entries are
+// relative paths to the repo root, using '/' as the path separator on all platforms.
+// Does not really belong in WorkingTreeCommands, but it's close enough, and we don't seem to have a
+// better place for it right now.
+func (self *WorkingTreeCommands) AllRepoFiles() ([]string, error) {
+	cmdArgs := NewGitCmd("ls-files").Arg("-z").ToArgv()
+	output, err := self.cmd.New(cmdArgs).DontLog().RunWithOutput()
+	if err != nil {
+		return nil, err
+	}
+	if output == "" {
+		return []string{}, nil
+	}
+	return strings.Split(strings.TrimRight(output, "\x00"), "\x00"), nil
+}

pkg/commands/git_commands/working_tree_test.go

@@ -563,3 +563,32 @@ func TestWorkingTreeResetHard(t *testing.T) {
 		})
 	}
 }
+
+func TestWorkingTreeCommands_AllRepoFiles(t *testing.T) {
+	scenarios := []struct {
+		name     string
+		runner   *oscommands.FakeCmdObjRunner
+		expected []string
+	}{
+		{
+			name: "no files",
+			runner: oscommands.NewFakeRunner(t).
+				ExpectGitArgs([]string{"ls-files", "-z"}, "", nil),
+			expected: []string{},
+		},
+		{
+			name: "two files",
+			runner: oscommands.NewFakeRunner(t).
+				ExpectGitArgs([]string{"ls-files", "-z"}, "dir/file1.txt\x00dir2/file2.go\x00", nil),
+			expected: []string{"dir/file1.txt", "dir2/file2.go"},
+		},
+	}
+	for _, s := range scenarios {
+		t.Run(s.name, func(t *testing.T) {
+			instance := buildWorkingTreeCommands(commonDeps{runner: s.runner})
+			result, err := instance.AllRepoFiles()
+			assert.NoError(t, err)
+			assert.Equal(t, s.expected, result)
+		})
+	}
+}

pkg/gui/controllers/helpers/suggestions_helper.go

@@ -2,15 +2,14 @@ package helpers
 
 import (
 	"fmt"
-	"os"
 	"strings"
 
+	"github.com/jesseduffield/generics/set"
 	"github.com/jesseduffield/gocui"
 	"github.com/jesseduffield/lazygit/pkg/commands/models"
 	"github.com/jesseduffield/lazygit/pkg/gui/presentation"
 	"github.com/jesseduffield/lazygit/pkg/gui/types"
 	"github.com/jesseduffield/lazygit/pkg/utils"
-	"github.com/jesseduffield/minimal/gitignore"
 	"github.com/samber/lo"
 	"golang.org/x/exp/slices"
 	"gopkg.in/ozeidan/fuzzy-patricia.v3/patricia"
@@ -92,22 +91,28 @@ func (self *SuggestionsHelper) GetBranchNameSuggestionsFunc() func(string) []*ty
 func (self *SuggestionsHelper) GetFilePathSuggestionsFunc() func(string) []*types.Suggestion {
 	_ = self.c.WithWaitingStatus(self.c.Tr.LoadingFileSuggestions, func(gocui.Task) error {
 		trie := patricia.NewTrie()
-		// load every non-gitignored file in the repo
-		ignore, err := gitignore.FromGit()
+
+		// load every file in the repo
+		files, err := self.c.Git().WorkingTree.AllRepoFiles()
 		if err != nil {
 			return err
 		}
 
-		err = ignore.Walk(".",
-			func(path string, info os.FileInfo, err error) error {
-				if err != nil {
-					return err
+		seen := set.New[string]()
+		for _, file := range files {
+			// For every file we also want to add its parent directories, but only once.
+			for i := range len(file) {
+				if file[i] == '/' {
+					dir := file[:i]
+					if !seen.Includes(dir) {
+						trie.Insert(patricia.Prefix(dir), dir)
+						seen.Add(dir)
+					}
 				}
-				if path != "." {
-					trie.Insert(patricia.Prefix(path), path)
-				}
-				return nil
-			})
+			}
+
+			trie.Insert(patricia.Prefix(file), file)
+		}
 
 		// cache the trie for future use
 		self.c.Model().FilesTrie = trie