helm/pkg/format/messages.go

/*
Copyright 2016 The Kubernetes Authors All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package format

import (
	"fmt"
	"os"

	"github.com/ghodss/yaml"
)

// This is all just placeholder.

// Err prints an error message to Stderr.
func Err(msg string, v ...interface{}) {
	msg = "[ERROR] " + msg + "\n"
	fmt.Fprintf(os.Stderr, msg, v...)
}

// Info prints an informational message to Stdout.
func Info(msg string, v ...interface{}) {
	msg = "[INFO] " + msg + "\n"
	fmt.Fprintf(os.Stdout, msg, v...)
}

// Msg prints a raw message to Stdout.
func Msg(msg string, v ...interface{}) {
	fmt.Fprintf(os.Stdout, msg, v...)
}

// Success is an achievement marked by pretty output.
func Success(msg string, v ...interface{}) {
	msg = "[Success] " + msg + "\n"
	fmt.Fprintf(os.Stdout, msg, v...)
}

// Warning emits a warning message.
func Warning(msg string, v ...interface{}) {
	msg = "[Warning] " + msg + "\n"
	fmt.Fprintf(os.Stdout, msg, v...)
}

// YAML prints an object in YAML format.
func YAML(v interface{}) error {
	y, err := yaml.Marshal(v)
	if err != nil {
		return fmt.Errorf("Failed to serialize to yaml: %s", v.(string))
	}

	Msg(string(y))
	return nil
}