cobra库:基于cobra-cli命令行生成项目结构

一、新建go项目

在F盘创建文件夹cobra-started

1、使用mod对go项目进行管理

go mod init cobra-started

二、使用cobra-cli代码生成

参考：https://github.com/spf13/cobra-cli/blob/main/README.md

1、设置 GOPROXY代理

PS F:\k8s\cobra-started> $env:GOPROXY = "https://proxy.golang.com.cn,direct" 

2、下载cobra-cli@latest

PS F:\k8s\cobra-started> go get  github.com/spf13/cobra-cli@latest                                                      go: downloading github.com/spf13/cobra-cli v1.3.0
go: downloading github.com/spf13/viper v1.10.1
go: downloading github.com/spf13/cobra v1.3.0
go: downloading github.com/mitchellh/mapstructure v1.4.3
go: downloading github.com/spf13/cast v1.4.1
go: downloading github.com/fsnotify/fsnotify v1.5.1
go: downloading github.com/magiconair/properties v1.8.5
go: downloading github.com/spf13/jwalterweatherman v1.1.0
go: downloading github.com/subosito/gotenv v1.2.0
go: downloading gopkg.in/ini.v1 v1.66.2
go: downloading github.com/hashicorp/hcl v1.0.0
go: downloading github.com/pelletier/go-toml v1.9.4
go: downloading golang.org/x/sys v0.0.0-20211210111614-af8b64212486
go get: installing executables with 'go get' in module mode is deprecated.
        To adjust and download dependencies of the current module, use 'go get -d'.
        To install using requirements of the current module, use 'go install'.
        To install ignoring the current module, use 'go install' with a version,
        like 'go install example.com/cmd@latest'.
        For more information, see https://golang.org/doc/go-get-install-deprecation
        or run 'go help get' or 'go help install'.
go get: added github.com/fsnotify/fsnotify v1.5.1
go get: added github.com/hashicorp/hcl v1.0.0
go get: added github.com/inconshreveable/mousetrap v1.0.0
go get: added github.com/magiconair/properties v1.8.5
go get: added github.com/mitchellh/mapstructure v1.4.3
go get: added github.com/pelletier/go-toml v1.9.4
go get: added github.com/spf13/afero v1.6.0
go get: added github.com/spf13/cast v1.4.1
go get: added github.com/spf13/cobra v1.3.0
go get: added github.com/spf13/cobra-cli v1.3.0
go get: added github.com/spf13/jwalterweatherman v1.1.0
go get: added github.com/spf13/pflag v1.0.5
go get: added github.com/spf13/viper v1.10.1
go get: added github.com/subosito/gotenv v1.2.0
go get: added golang.org/x/sys v0.0.0-20211210111614-af8b64212486
go get: added golang.org/x/text v0.3.7
go get: added gopkg.in/ini.v1 v1.66.2
go get: added gopkg.in/yaml.v2 v2.4.0

3、从$GOPATH/bin目录下把cobra-cli.exe命令拷贝到F:\k8s\cobra-started目录下

4、执行 .\cobra-cli init生成代码结构

PS F:\k8s\cobra-started> .\cobra-cli init                                                                               Your Cobra application is ready at
F:\k8s\cobra-started

5、查看生成的代码结构

PS F:\k8s\cobra-started> ls                                                                                             

    目录: F:\k8s\cobra-started


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
d-----         2022/4/2      9:17                cmd
-a----         2022/4/2      9:14        8210944 cobra-cli.exe
-a----         2022/4/2      9:17            891 go.mod
-a----         2022/4/2      9:17          77739 go.sum
-a----         2022/4/2      9:17              0 LICENSE
-a----         2022/4/2      9:17            124 main.go

6、生成的文件
main.go

package main

import "cobra-started/cmd"

func main() {
	cmd.Execute()
}

cmd/root.go

package cmd

import (
	"os"

	"github.com/spf13/cobra"
)



// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
	Use:   "cobra-started",
	Short: "A brief description of your application",
	Long: `A longer description that spans multiple lines and likely contains
examples and usage of using your application. For example:

Cobra is a CLI library for Go that empowers applications.
This application is a tool to generate the needed files
to quickly create a Cobra application.`,
	// Uncomment the following line if your bare application
	// has an action associated with it:
	// Run: func(cmd *cobra.Command, args []string) { },
}

// Execute adds all child commands to the root command and sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute() {
	err := rootCmd.Execute()
	if err != nil {
		os.Exit(1)
	}
}

func init() {
	// 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/.cobra-started.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")
}