simple script to convert between JSON and YAML

yaml-json.rb

#! /usr/bin/env ruby

def usage
  puts "USAGE: binary file.json/yaml [json/yaml] "
  true
end

require 'yaml'
require 'json'

TYPE_JSON, TYPE_YAML = ['json','yaml']

def main
  file , type = ARGV
  content = nil
  
  
  usage and return unless file
  
  # get type by file extension if not defined
  type = file.split('.').last unless type
  type.downcase! if type    

  unless type or [TYPE_JSON,TYPE_YAML ].include? type.downcase
    usage and return
  end


  case type
  when TYPE_YAML
    content = YAML::load( File.open(file) ) #.to_json  
    content = JSON.pretty_generate( content )
  when TYPE_JSON
    content = JSON::load( File.open(file) ).to_yaml
  end  
  
  puts content
end


main()