Find a file in an ancestory directory

dnif.go

package main

import (
	"flag"
	"fmt"
	"log"
	"os"
	"strings"
)

func check(path string) bool {
	_, err := os.Stat(path)
	return !os.IsNotExist(err)
}

func isRoot() bool {
	d, err := os.Getwd()
	if err != nil {
		return true
	}
	fmt.Println(d)
	return d == "/"
}

func main() {
	flag.Parse()

	d, err := os.Getwd()
	if err != nil {
		log.Println(err)
		return
	}
	height := len(strings.Split(d, "/")) - 2

	path := flag.Arg(0)
	if path[0:2] == "./" {
		path = path[2:]
	}

	for i := 0; i <= height; i++ {
		if check(path) {
			fmt.Println(path)
			return
		} else {
			path = "../" + path
		}
	}
}