Find matching configs between heroku apps

matching_configs.rb

=begin
Usage: ruby matching_configs <app1> <app2>
=end

require 'json'

first_app_name = ARGV[0]
second_app_name = ARGV[1]

puts "Finding matches for #{first_app_name} -> #{second_app_name}"

first_app = JSON.load %x(heroku config --json --app #{first_app_name})
second_app = JSON.load %x(heroku config --json --app #{second_app_name})

matched = []
first_app.each do |key, val|
  if second_app.has_value? val
    matched_keys = second_app.select { |k, v| v == val }
    matched.push("#{key} -> #{matched_keys.keys.count == 1 ? matched_keys.keys[0] : matched_keys.keys}")
  end
end

puts "------------------------"
puts matched