json2yaml

#!/usr/bin/env ruby

require 'json'
require 'yaml'

json = ARGV.first or raise ArgumentError, "Please specify a json file to parse."

begin
  if json == '-'
    jdata = ARGF.read.chomp

    puts  YAML.dump(JSON.load(jdata))
  else
    puts  YAML.dump(JSON.load(File.read(json).chomp))
  end
rescue => e
  $stderr.puts 'Unable to comply: %s' % [e.message]
end