I made a small repo called good to regroup CLI commands and packages I like to use in Go:

export GOPATH=$HOME/goexport PATH=$PATH:$GOROOT/bin:$GOPATH/bin

It's a mix of hacks and more "advanced" integrations to be used as CLI commands in the terminal.

I used Cobra, an incredible library to write CLI applications in Go.

Their documentation is pretty good and the package is quite easy to use. I had the need to "categorize" my commands, though. I don't pretend it's the best way to do it, but I like to use subcommands for that.

For example, in my repo, I use 3 categories:

• fun
• check
• hack

Cobra is very cool, as it automates lots of tasks in the terminal (usages, man documentation, suggestions, etc) and improves the user experience while abstracting the difficulty of developing CLI commands in Go. The following commands will display all CLI available for fun, checking hardware, and hacking:

good fungood checkgood hack

It's helpful even for me, as a maintainer.

To add subcommands, you can write the following in your package:

var rootCmd = &cobra.Command{    Use:   "mycommand",    Short: "short description",}var subCmd = &cobra.Command{    Use:   "mysubcommand",    Short: "short description",}

and then in the init function:

func init() {    rootCmd.AddCommand(subCmd)}

Users can type mycommand and get mysubcommand as a recommended usage.

Then, if I want to add a subcommand for mysubcommand, I can register it like that:

subsubcommand = &cobra.Command{   Use:   "subsubcommand",   Short: "short description",}mysubcommand.AddCommand(subsubcommand)