Added String var kind

ui.go

@@ -160,6 +160,8 @@ func colorByKind(kind VarKind) termui.Attribute {
 		return termui.ColorRed | termui.AttrBold
 	case KindDuration:
 		return termui.ColorYellow | termui.AttrBold
+	case KindString:
+		return termui.ColorGreen | termui.AttrBold
 	default:
 		return termui.ColorBlue | termui.AttrBold
 	}

ui_single.go

@@ -88,6 +88,9 @@ func (t *TermUISingle) Update(data UIData) {
 
 	// Sparklines
 	for i, name := range data.Vars {
+		if name.Kind() == KindString {
+			continue
+		}
 		spl := &t.Sparkline.Lines[i]
 		spl.Title = fmt.Sprintf("%s: %v", name.Long(), service.Value(name))
 		spl.TitleColor = colorByKind(name.Kind())

var.go

@@ -16,6 +16,7 @@ const (
 	KindDefault VarKind = iota
 	KindMemory
 	KindDuration
+	KindString
 )
 
 // ToSlice converts "dot-separated" notation into the "slice of strings".
@@ -62,6 +63,8 @@ func (v VarName) Kind() VarKind {
 		return KindMemory
 	case "duration":
 		return KindDuration
+	case "str":
+		return KindString
 	}
 	return KindDefault
 }