Copies heroku env from one app to another. Call it with `ruby copy_heroku_env.rb my-app-to-copy-from my-app-to-copy-to`

copy_heroku_env.rb

require 'json'

from_app, to_app = ARGV

envs_to_ignore = ['DATABASE_URL']

config =
  JSON.parse(`heroku config --app #{from_app} --json`)
      .reduce('') do |memo, (key, value)|
        if envs_to_ignore.include? key
          memo
        else
          memo + "#{key}='#{value}' "
        end
      end

`heroku config:set --app #{to_app} #{config}`