sorting environments/*.json for chef

_sort_env_json.rb

#! /usr/bin/env ruby

# ruby sort_env_json.rb environments/*.json
# ruby sort_env_json.rb environments/*.json --like environments/prod.json
require './json_file'
require 'optparse'

begin
  $stderr.puts "please supply a list of environments/*.json paths you'd like to have sorted alphabetically"
  exit(1)
end if ARGV.length == 0

OptionParser.new do |opt|
  opt.on("--like [JSONFILE]", "sort using the order in JSONFILE, with remainders at the beginning") do |o|
    #'environments/prod.json'
    
    $orderer = lambda{|trunk|
      $prod ||= begin; a=JSONfile.new(o); a.files; end
      (trunk.apps - $prod.apps) + $prod.apps
    } 
  end
end.parse!(ARGV)
$orderer ||= lambda{|trunk| trunk.apps.sort  } #alphabetically

ARGV.map{|i| a=JSONFile.new(i); a.files; a}.each do |trunk|
  order = $orderer.call(trunk)
  out = trunk.sort_apps(order)
  puts JSON.pretty_generate(out) if $DEBUG
  trunk.write
  trunk.close
end

   

json_file.rb

 require 'json'

 class Chef
   class Environment
   end
 end

 class JSONfile
   def initialize(path)
     @path = path
   end
   
   def files
     @read = File.read(@path)
     @write = File.open(@path,'w')
   end
   def close
     @write.close
   end
   def json
     @json ||= JSON.parse(@read)
   end

   def app_root
     json['default_attributes']
   end
   def apps
     app_root.keys
   end
   def write
     @write.puts JSON.pretty_generate(@json)
   end

   def sort_apps(order = self.apps)
     json['default_attributes'] =
       begin
         old = app_root.to_a
         _new = {}
         order.each do |i| v=old.find{|j| j.first == i}
         _new[i] = v.last if v
       end
         _new
       end
   end
 end

I'll look at getting this into a knife plugin ASAP. Slick.