#!/usr/bin/env ruby

require 'rubygems'
require 'json'
require 'plist'

outfile = case ARGV.size
          when 0
            text = ARGF.read
            self
          when 1
            text = File.read(ARGV.first)
            newname = ARGV.first.sub(/(\.json$|.js$|$)/, '.plist')
            File.open(newname, 'w')
          when 2
            text = File.read(ARGV.first)
            File.open(ARGV.last, 'w')
          else
            STDERR.puts "Usage: #{$PROGRAM_NAME} [infile [outfile]]"
            exit 1
          end

outfile.puts JSON.parse(text).to_plist