realpath.go

package main

import (
	"os"
	"fmt"
	"flag"
	"path/filepath"
)

func main() {
	var quiet bool
	var dontResolveSymlinks bool

	flag.BoolVar(&quiet, "q", false, "warnings will not be printed")
	flag.BoolVar(&dontResolveSymlinks, "s", false, "do not resolve symlink")

	flag.Parse()

	for _, path := range flag.Args() {
		s, err := filepath.Abs(path)
		if err != nil {
			if !quiet {
				fmt.Fprintln(os.Stderr, err)
			}
			continue
		}
		if !dontResolveSymlinks {
			s, err = filepath.EvalSymlinks(s)
			if err != nil {
				if !quiet {
					fmt.Fprintln(os.Stderr, err)
				}
				continue
			}
		}
		fmt.Println(s)
	}
}