golang命令行库cobra的使用

candy

// Copyright © 2016 NAME HERE 　　//
　　// 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 cmd
　　import (
　　"fmt"
　　"os"
　　"github.com/spf13/cobra"
　　//  "github.com/spf13/viper"
　　"demo/imp"
　　)
　　//var cfgFile string
　　var name string
　　var age int
　　// RootCmd represents the base command when called without any subcommands
　　var RootCmd = &cobra.Command{
　　Use:   "demo",
　　Short: "A test demo",
　　Long:  `Demo is a test appcation for print things`,
　　// Uncomment the following line if your bare application
　　// has an action associated with it:
　　Run: func(cmd *cobra.Command, args []string) {
　　if len(name) == 0 {
　　cmd.Help()
　　return
　　}
　　imp.Show(name, age)
　　},
　　}
　　// Execute adds all child commands to the root command sets flags appropriately.
　　// This is called by main.main(). It only needs to happen once to the rootCmd.
　　func Execute() {
　　if err := RootCmd.Execute(); err != nil {
　　fmt.Println(err)
　　os.Exit(-1)
　　}
　　}
　　func init() {
　　//  cobra.OnInitialize(initConfig)
　　// Here you will define your flags and configuration settings.
　　// Cobra supports Persistent Flags, which, if defined here,
　　// will be global for your application.
　　//  RootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.demo.yaml)")
　　// Cobra also supports local flags, which will only run
　　// when this action is called directly.
　　//  RootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
　　RootCmd.Flags().StringVarP(&name, "name", "n", "", "person's name")
　　RootCmd.Flags().IntVarP(&age, "age", "a", 0, "person's age")
　　}
　　// initConfig reads in config file and ENV variables if set.
　　//func initConfig() {
　　//  if cfgFile != "" { // enable ability to specify config file via flag
　　//      viper.SetConfigFile(cfgFile)
　　//  }
　　//  viper.SetConfigName(".demo") // name of config file (without extension)
　　//  viper.AddConfigPath("$HOME") // adding home directory as first search path
　　//  viper.AutomaticEnv()         // read in environment variables that match
　　//  // If a config file is found, read it in.
　　//  if err := viper.ReadInConfig(); err == nil {
　　//      fmt.Println("Using config file:", viper.ConfigFileUsed())
　　//  }
　　//}