DSL for building contracts using mixins and inheritance

contract.rb

class AbstractionsContractBase < ContractBase
  include AbstractionsContract::Clauses::CodeOfConduct
  include AbstractionsContract::Clauses::LiabilityDisclaimer
end

class AbstractionsBronzeContract < AbstractionsContractBase
  include AbstractionsContract::Clauses::PaidSponsorship
  min_payment 10_000.USD
  include AbstractionsContract::Clauses::Perks::WebsiteLogo
  include AbstractionsContract::Clauses::Perks::Table
  include AbstractionsContract::Clauses::Perks::Whatever
end

sponsor_contract = AbstractionsBronzeContract.new name: 'Spacely Sprockets', payment: 11_000.USD, signatory: 'Cosmo Spacely'

File.open("spacely_sprockets_contract.pdf", 'w') { |f| f.write sponsor_contract.to_pdf }

sponsor_contract_with_amendments = AbstractionsBronzeContract.new name: 'Cogswell Cogs', payment: 11_001.USD, signatory: 'W.C. Cogswell', amendments: <-AMENDMENTS_END
  Sponsor must always been given the option to provide more support than Spacely Sprockets.

  Sponsor will be permitted to deliver a two minute opening address before the headlining session each day.
AMENDMENTS_END

File.open("cogswell_cogs_contract.pdf", 'w') { |f| f.write sponsor_contract_with_amendments.to_pdf }