add format management for command-line commands

clifmt/colors.go

@@ -0,0 +1,13 @@
+package clifmt
+
+import (
+	"fmt"
+)
+
+func Color(color byte, s string, bold ...bool) string {
+	b := "0"
+	if len(bold) > 0 && bold[0] {
+		b = "1"
+	}
+	return fmt.Sprintf("\033[%s;%dm%s\033[0m", b, color, s)
+}

clifmt/symbols.go

@@ -0,0 +1,20 @@
+package clifmt
+
+import (
+	"fmt"
+)
+
+func Warn(s ...string) string {
+	if len(s) == 0 {
+		return Color(31, "/!\\")
+	}
+
+	return fmt.Sprintf("%s  %s", Warn(), s[0])
+}
+func Info(s ...string) string {
+	if len(s) == 0 {
+		return Color(34, "(!)")
+	}
+
+	return fmt.Sprintf("%s  %s", Info(), s[0])
+}