cmdos

cmdos

A flag and subcommand library

package main

import (
	"fmt"
	"os"

	"codeberg.org/roble/cmdos"
)

type rootCmd struct{}

func (*rootCmd) Details() cmdos.Details {
	return cmdos.Details{
		Name:        "mycmd",
		Description: "my command",
	}
}

func (*rootCmd) Flags() []cmdos.Flag {
	return []cmdos.Flag{
        cmdos.FlagHelp,
		{
			Short:       'a',
			Long:        "addr",
			Description: "listen address",
			Value:         cmdos.ValueOptional(":8082"),
		},
		{
			Short:       'o',
			Long:        "output",
			Description: "file location to save",
			Value:       cmdos.ValueRequired(),
		},
	}
}

func (c *rootCmd) Run(vs *cmdos.Values) error {
	var opt struct {
		Help   bool   `cmdos:"help"`
		Addr   string `cmdos:"addr"`
		Output string
	}
	if err := vs.Decode(&opt); err != nil {
		return err
	}

	if opt.Help {
		return cmdos.WriteHelp(os.Stdout, c)
	}

	fmt.Println("addr:", opt.Addr)

	return nil
}

func main() {
	if err := cmdos.Run(os.Args, new(rootCmd)); err != nil {
		fmt.Fprintln(os.Stderr, err)
	}
}

$ cmdostest -h
my command

usage:
  mycmd [options]

options:
  -h, --help  display help and exit
  -a, --addr  listen address
  -o, --output  file location to save