/*
   Copyright 2016 GitHub Inc.
	 See https://github.com/github/gh-ost/blob/master/LICENSE
*/

package base

import (
	"fmt"
	"os"
	"regexp"
	"time"
)

var (
	prettifyDurationRegexp = regexp.MustCompile("([.][0-9]+)")
)

func PrettifyDurationOutput(d time.Duration) string {
	if d < time.Second {
		return "0s"
	}
	result := fmt.Sprintf("%s", d)
	result = prettifyDurationRegexp.ReplaceAllString(result, "")
	return result
}

func FileExists(fileName string) bool {
	if _, err := os.Stat(fileName); err == nil {
		return true
	}
	return false
}