main.go

package main

import (
	"context"
	"errors"
	"fmt"
	"io"
	"log"
	"os"

	"github.com/DavidGamba/go-getoptions"
)

var Logger = log.New(os.Stderr, "", log.LstdFlags)

func main() {
	os.Exit(program(os.Args))
}

func program(args []string) int {
	opt := getoptions.New()
	opt.Bool("quiet", false, opt.GetEnv("QUIET"))
	opt.SetUnknownMode(getoptions.Pass)
	opt.NewCommand("cmd", "description").SetCommandFn(Run)
	opt.HelpCommand("help", opt.Alias("?"))
	remaining, err := opt.Parse(args[1:])
	if err != nil {
		fmt.Fprintf(os.Stderr, "ERROR: %s\n", err)
		return 1
	}
	if opt.Called("quiet") {
		Logger.SetOutput(io.Discard)
	}
	Logger.Println(remaining)

	ctx, cancel, done := getoptions.InterruptContext()
	defer func() { cancel(); <-done }()

	err = opt.Dispatch(ctx, remaining)
	if err != nil {
		if errors.Is(err, getoptions.ErrorHelpCalled) {
			return 1
		}
		fmt.Fprintf(os.Stderr, "ERROR: %s\n", err)
		if errors.Is(err, getoptions.ErrorParsing) {
			fmt.Fprintf(os.Stderr, "\n%s", opt.Help())
		}
		return 1
	}
	return 0
}

func Run(ctx context.Context, opt *getoptions.GetOpt, args []string) error {
	Logger.Printf("Running")
	return nil
}