Go - open a URL in the default Web Browser

go-open-url.go

package main

import (
	"runtime"
	"errors"
	"bytes"
	"os/exec"
	"io"
)

var cli map[string]string
var stderr bytes.Buffer

func init() {
	cli = map[string]string{
		"windows": "start",
		"darwin": "open",
		"linux": "xdg-open",
	}
}

func Open(urls ...string) (io.Writer, error) {
	if open, err := cli[runtime.GOOS]; !err {
		return nil, errors.New("This operating system is not supported.")
	}else {
		for _, value := range urls {
			cmd := exec.Command(open, value)
			cmd.Stderr = &stderr
			if err := cmd.Run(); err != nil {
				return cmd.Stderr, err
			}
		}
	}
	return nil, nil
}