module Vault
  module Config
    extend self

    def env(key)
      ENV[key]
    end

    def env!(key)
      env(key) || raise("missing #{key}")
    end

    def app_name; env("APP_NAME"); end
    def port; env!("PORT").to_i; end

    def database_url(kind = '')
      kind = "#{kind}_".upcase unless kind.empty?
      env!("#{kind}DATABASE_URL")
    end
  end
end