module SimpleCov::LastRun
  class << self
    def last_run_path
      File.join(SimpleCov.coverage_path, '.last_run.json')
    end

    def read
      return nil unless File.exist?(last_run_path)

      SimpleCov::JSON.parse(File.read(last_run_path))
    end

    def write(json)
      File.open(last_run_path, "w+") do |f|
        f.puts SimpleCov::JSON.dump(json)
      end
    end
  end
end