Fix bug

Author: lunny

modules/git/attribute/batch.go

@@ -36,6 +36,9 @@ type BatchChecker struct {
 // NewBatchChecker creates a check attribute reader for the current repository and provided commit ID
 func NewBatchChecker(repo *git.Repository, treeish string, attributes ...string) (*BatchChecker, error) {
 	ctx, cancel := context.WithCancel(repo.Ctx)
+	if len(attributes) == 0 {
+		attributes = LinguistAttributes
+	}
 	checker := &BatchChecker{
 		Attributes: attributes,
 		Repo:       repo,

modules/git/attribute/checker.go

@@ -18,7 +18,9 @@ func checkAttrCommand(gitRepo *git.Repository, treeish string, filenames, attrib
 	if len(attributes) == 0 {
 		cmd.AddArguments("--all")
 	}
-	cmd.AddDashesAndList(filenames...)
+	if len(filenames) > 0 {
+		cmd.AddDashesAndList(filenames...)
+	}
 	cancel := func() {}
 	if git.DefaultFeatures().SupportCheckAttrOnBare && treeish != "" {
 		cmd.AddArguments("--source")