brew/Library/Homebrew/extend/os/linux/simulate_system.rb

# typed: strict
# frozen_string_literal: true

module OS
  module Linux
    module SimulateSystem
      module ClassMethods
        sig { returns(T.nilable(Symbol)) }
        def os
          @os ||= T.let(nil, T.nilable(Symbol))
          return :macos if @os.blank? && Homebrew::EnvConfig.simulate_macos_on_linux?

          @os
        end

        sig { returns(T::Boolean) }
        def simulating_or_running_on_linux?
          os.blank? || os == :linux
        end

        sig { returns(Symbol) }
        def current_os
          os || :linux
        end
      end
    end
  end
end

Homebrew::SimulateSystem.singleton_class.prepend(OS::Linux::SimulateSystem::ClassMethods)