Program for testing programs that launch other programs. Dawg.

helloworlddoer.go

package main

import (
	"fmt"
	"time"

	"github.com/pkg/errors"
	flag "github.com/spf13/pflag"
)

const phrase = "Hello, World!"

var (
	sleepStr = flag.StringP("time", "t", "1s", "sleep time between printing")
)

func main() {
	flag.Parse()

	now := time.Now()
	sleepTime, err := time.ParseDuration(*sleepStr)
	if err != nil {
		fmt.Println(errors.Wrap(err, "cannot parse sleep time"))
		fmt.Println("Defaulting to one second")
		sleepTime = time.Second
	}

	for {
		fmt.Printf("%s; it has been %s since starting\n", phrase, time.Since(now).String())
		time.Sleep(sleepTime)
	}
}