golang open url in default browser

url_open.go

// https://stackoverflow.com/questions/39320371/how-start-web-server-to-open-page-in-browser-in-golang
// open opens the specified URL in the default browser of the user.
func open(url string) error {
    var cmd string
    var args []string

    switch runtime.GOOS {
    case "windows":
        cmd = "cmd"
        args = []string{"/c", "start"}
    case "darwin":
        cmd = "open"
    default: // "linux", "freebsd", "openbsd", "netbsd"
        cmd = "xdg-open"
    }
    args = append(args, url)
    return exec.Command(cmd, args...).Start()
}

// https://stackoverflow.com/questions/39320371/how-start-web-server-to-open-page-in-browser-in-golang
// openURL opens the specified URL in the default browser of the user.
func openURL(url string) error {
	var cmd string
	var args []string

	switch runtime.GOOS {
	case "windows":
		cmd = "cmd"
		args = []string{"/c", "start"}
	case "darwin":
		cmd = "open"
	default: // "linux", "freebsd", "openbsd", "netbsd"
		// Check if running under WSL
		if isWSL() {
			// Use 'cmd.exe /c start' to open the URL in the default Windows browser
			cmd = "cmd.exe"
			args = []string{"/c", "start", url}
		} else {
			// Use xdg-open on native Linux environments
			cmd = "xdg-open"
			args = []string{url}
		}
	}
	if len(args) > 1 {
		// args[0] is used for 'start' command argument, to prevent issues with URLs starting with a quote
		args = append(args[:1], append([]string{""}, args[1:]...)...)
	}
	return exec.Command(cmd, args...).Start()
}

// isWSL checks if the Go program is running inside Windows Subsystem for Linux
func isWSL() bool {
	releaseData, err := exec.Command("uname", "-r").Output()
	if err != nil {
		return false
	}
	return strings.Contains(strings.ToLower(string(releaseData)), "microsoft")
}

This works in WSL