Small ruby script that reads all the keys in Localizable.strings and make sure that all have the same keys

strings.rb

#!/usr/bin/env ruby

require 'set'

files = `find . -name Localizable.strings`.split("\n")

# Builds a list of keys
keys = Set.new
MATCH_FORMAT = /\"(.*)\"[ ]*=[ ]*\".*\"/
files.each do | file |
    File.open(file).each do | line |
        line.match(MATCH_FORMAT) {|m|
            keys.add(m.captures.first)
        }
    end
end

# Checks that all the files contains all keys
files.each do |file|
    file_data = File.open(file).read
    keys.each do | key |
        match = file_data.match(/\"#{key}\"/)
        if match.nil?
            STDERR.puts "#{File.absolute_path(file)}:1:1: warning: Missing #{key}\n"
        end
    end
end %