xflag extends flag and provides methods to open files for reading and writing.

import "github.com/stevedonovan/xflag"

var flag = xflag.NewFlag()
var ofp = flag.CreateFile("o","stdout","output file")
var iflp = flag.OpenFileList("#1","stdin","input files")

Here ofp is type **os.File, and iflp is *[]string. This will verify that all parameters on the command-line can be opened for reading.

Otherwise, all the methods of package flag are available.

You can read in simple configuration files with flag.ParseConfig and have the lines mapped to flag variables.

Steve Donovan, Copyright 2011 Licence: MIT/X11