@@ -9,8 +9,17 @@
 	"gitlab.com/tozd/go/errors"
 )
 
+func Stat(path string) (fs.FileInfo, errors.E) {
+	stat, err := os.Stat(path)
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
+		return nil, errors.WithStack(err)
+	}
+
+	return stat, nil
+}
+
 func Exists(path string) bool {
-	stat, err := os.Stat(path)
+	stat, err := Stat(path)
 	if err != nil && !errors.Is(err, fs.ErrNotExist) {
 		panic("could not stat path " + path + ": " + err.Error())
 	}
@@ -18,7 +27,7 @@
 	return stat != nil
 }
 
-func Copy(src, dest string) error {
+func Copy(src, dest string) errors.E {
 	stat, err := os.Stat(src)
 	if err != nil {
 		return errors.WithMessage(err, "could not stat source file")
@@ -48,15 +57,15 @@
 	return nil
 }
 
-func CleanDir(dir string) (err error) {
+func CleanDir(dir string) errors.E {
 	files, err := os.ReadDir(dir)
 	if err != nil {
-		return errors.WithMessage(err, "could not read directory")
+		return errors.WithMessage(errors.WithStack(err), "could not read directory")
 	}
 
 	for _, file := range files {
 		err = errors.Join(err, os.RemoveAll(filepath.Join(dir, file.Name())))
 	}
 
-	return err
+	return errors.WithStack(err)
 }