关于后端:使用-cobracli-搭建手脚架

应用 cobra-cli 搭建手脚架

# 装置 cobra-cligo install github.com/spf13/cobra-cli@latest# 创立一个利用mkdir myapp && cd myapp# 初始化 go modgo mod init myapp# 应用 cobra-cli 搭建手脚架cobra-cli init

留神: cobra-cli 在 go1.18+ 的 go work 模式下有 bug, 不要应用 go work 模式
2022年11月18日的最新版本1.3.0 查看 issue https://github.com/spf13/cobra-cli/issues/26

查看生成的代码

$ tree -L 2.├── LICENSE├── cmd│   └── root.go├── go.mod├── go.sum└── main.go

测试运行

$ go run main.go A longer description that spans multiple lines and likely containsexamples 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 filesto quickly create a Cobra application.

新增命令

cobra-cli add servecobra-cli add config

查看新增的命令

$ go run main.goA longer description that spans multiple lines and likely containsexamples 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 filesto quickly create a Cobra application.Usage:  myapp [command]Available Commands:  completion  Generate the autocompletion script for the specified shell  config      A brief description of your command  help        Help about any command  serve       A brief description of your commandFlags:  -h, --help     help for myapp  -t, --toggle   Help message for toggleUse "myapp [command] --help" for more information about a command.$ 

新增 config 命令的子命令

cobra-cli add create -p 'configCmd'

查看新增的子命令

$ go run main.go config --helpA longer description that spans multiple lines and likely contains examplesand usage of using your command. For example:Cobra is a CLI library for Go that empowers applications.This application is a tool to generate the needed filesto quickly create a Cobra application.Usage:  myapp config [flags]  myapp config [command]Available Commands:  create      A brief description of your commandFlags:  -h, --help   help for configUse "myapp config [command] --help" for more information about a command.$

填充业务逻辑

定义 Flags

Flag 有 2 种, Persistent Flag 和 Local Flag, Persistent Flag 能够在此命令和所有的子命令都失效, Local Flag 只是在此命令失效

比方绑定到 rootCmd 的 Persistent Flag 相当于全局 Flag, 所有的命令都能调用

rootCmd.PersistentFlags().BoolVarP(&Verbose, "verbose", "v", false, "verbose output")

然而 Local Flag 只是在以后无效

localCmd.Flags().StringVarP(&Source, "source", "s", "", "Source directory to read from")

reference

更多参考

• https://github.com/spf13/cobra-cli
• https://github.com/spf13/cobra

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