app

type exampleCommand struct {
    test string
}

func (c *exampleCommand) Name() string {
    return "example"
}

func (c *exampleCommand) Usage() string {
    return "just example command"
}

func (c *exampleCommand) Flags() *flag.FlagSet {
    fs := flag.NewFlagSet(c.Name(), flag.ExitOnError)
    fs.StringVar(&c.test, "test", "value", "test flag")
    return fs
}

func (c *exampleCommand) Run(args []string) error {
    fmt.Printf("Runned %s command with flag -test=%s and args: %v", c.Name(), c.test, args)
    return nil
}

package main

import "github.com/neonxp/app"

func main() {
    app := app.New([]app.Command{
        exampleCommand{}, // <- Register command
    })
    if err := app.Start(os.Args); err != nil { // <- Run!
        fmt.Println(err)
        os.Exit(1)
    }
}