added PrintAsJSON

printjson.go

@@ -0,0 +1,32 @@
+package pretty
+
+import (
+	"encoding/json"
+	"fmt"
+	"strings"
+)
+
+// PrintAsJSON marshalles input as indented JSON
+// and calles fmt.Println with the result.
+// If indent arguments are given, they are joined into
+// a string and used as JSON line indent.
+// If no indet argument is given, two spaces will be used
+// to indent JSON lines.
+// A byte slice as input will be marshalled as json.RawMessage.
+func PrintAsJSON(input interface{}, indent ...string) {
+	var indentStr string
+	if len(indent) == 0 {
+		indentStr = "  "
+	} else {
+		indentStr = strings.Join(indent, "")
+	}
+	if b, ok := input.([]byte); ok {
+		input = json.RawMessage(b)
+	}
+	data, err := json.MarshalIndent(input, "", indentStr)
+	if err != nil {
+		_, _ = fmt.Println(fmt.Errorf("%w from input: %#v", err, input))
+		return
+	}
+	_, _ = fmt.Println(string(data))
+}