Index: Ignore files and folders starting with @ #1543

Synology stores hidden sidecar / thumbnail files in @eaDir.

pkg/fs/ignore.go

@@ -156,7 +156,7 @@ func (l *IgnoreList) Ignore(fileName string) bool {
 		}
 	}
 
-	if l.ignoreHidden && strings.HasPrefix(filepath.Base(fileName), ".") {
+	if l.ignoreHidden && FileNameHidden(fileName) {
 		l.hiddenFiles = append(l.hiddenFiles, fileName)
 		return true
 	}

pkg/fs/name.go

@@ -53,3 +53,21 @@ func RelName(fileName, dir string) string {
 
 	return fileName
 }
+
+// FileNameHidden tests is a file name belongs to a hidden file.
+func FileNameHidden(name string) bool {
+	if name == "" {
+		return false
+	}
+
+	name = filepath.Base(name)
+
+	prefix := name[0:1]
+
+	switch prefix {
+	case ".", "@":
+		return true
+	default:
+		return false
+	}
+}

pkg/fs/name_test.go

@@ -67,3 +67,28 @@ func TestFileName(t *testing.T) {
 		assert.Equal(t, "testdata/FOO.XMP.jpeg", result)
 	})
 }
+
+func TestFileNameHidden(t *testing.T) {
+	t.Run("AtPrefix", func(t *testing.T) {
+		assert.True(t, FileNameHidden("/some/path/@eaDir"))
+	})
+	t.Run("DotPrefix", func(t *testing.T) {
+		assert.True(t, FileNameHidden("/some/.folder"))
+	})
+	t.Run("HasAts", func(t *testing.T) {
+		assert.False(t, FileNameHidden("/some/path/ea@Dir"))
+		assert.False(t, FileNameHidden("/some/@path/ea@Dir"))
+		assert.False(t, FileNameHidden("@/eaDir"))
+	})
+	t.Run("HasDots", func(t *testing.T) {
+		assert.False(t, FileNameHidden("/some/image.jpg."))
+		assert.False(t, FileNameHidden("./.some/foo"))
+	})
+	t.Run("False", func(t *testing.T) {
+		assert.False(t, FileNameHidden("/some/path/folder"))
+	})
+	t.Run("Empty", func(t *testing.T) {
+		assert.False(t, FileNameHidden(""))
+	})
+
+}