使用Golang快速构建出命令行应用程序

package main
 
import (
	"fmt"
	"log"
	"os"
 
	"github.com/urfave/cli/v2"
)
 
funcmain() {
	app := &cli.App{
		Name:  "blog",
		Usage: "显示路多辛blog欢迎语",
		Action: func(*cli.Context)error {
			fmt.Println("欢迎来到路多辛的blog，能帮助到大家是我最大的快乐！")
			returnnil
		},
	}
 
	if err := app.Run(os.Args); err != nil {
		log.Fatal(err)
	}
}

$ ./main -h 
NAME:
   blog - 显示路多辛blog欢迎语
 
USAGE:
   blog [global options] command [command options] [arguments...]
 
COMMANDS:
   help, h  Shows a list of commands or helpfor one command
 
GLOBAL OPTIONS:
   --help, -h  show help

$ ./main blog
欢迎来到路多辛的blog，能帮助到大家是我最大的快乐！

package main
 
import (
	"fmt"
	"os"
 
	"github.com/spf13/cobra"
)
 
funcmain() {
	Execute()
}
 
funcExecute() {
	var rootCmd = &cobra.Command{
		Use:   "blog",
		Short: "显示路多辛blog欢迎语",
		Long:  "显示路多辛blog欢迎语，介绍blog的整体情况",
		Run: func(cmd *cobra.Command, args []string) {
			fmt.Println("欢迎来到路多辛的blog，能帮助到大家是我最大的快乐！")
		},
	}
	if err := rootCmd.Execute(); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
}

$./main -h       显示路多辛blog欢迎语，介绍blog的整体情况Usage:blog[flags]Flags:-h,--help   help for blog

$ ./main blog
欢迎来到路多辛的blog，能帮助到大家是我最大的快乐！