.citrus.rb

longer_build_script = <<END
export WEIRD_VAR=3
export GIT_SSH=ssh-with-another-identity-hack

git clone strange_dependency_repo.git somewhere
bundle exec rake test
END

Citrus::Config.new do |c|
  # how many isolated VMs to start for each build step,
  # split based purely on test file count like TDDium
  #
  # in fact this will work only with "knowledgeable" runners,
  c.build_concurrency = 2

  # how many builds to store (probably also with provisioned VMs)
  c.keep_builds = 3

  # valid Ruby code goes here
  #
  # run indicates build step, where bang version is
  # asynchronous (another build step will not wait for it's result)
  #
  # build steps are enumerated in order they're executed
  # (enumeration for notification purposes)
  c.build :bash do |shell|
    if shell.run "bundle exec rake test"
      shell.run! "EVIL_VAR=13 bundle exec rake test"
      shell.run! longer_build_script

      # an example of non-dumb test runner,
      # which does round robin on test files
      #
      # shell.minitest! "test/**/*_test.rb"
    end
  end

  c.provision :chef_solo do |chef|
    #   chef.cookbooks_path = "../my-recipes/cookbooks"
    #   chef.roles_path = "../my-recipes/roles"
    #   chef.data_bags_path = "../my-recipes/data_bags"
    chef.add_recipe "mysql"
    chef.add_role "web"
  end
end

class MinitestRunner < Citrus::TestRunner
  def split
    test_files = Dir[@args.first]
    return test_files.each_slice(test_files.count / concurrency).to_a
  end

  # items is an item from collection returned in split
  # execute is called async for each split item
  def execute(items)
    "ruby -Ilib -Itest #{items}"
  end
end


class MinitestHistoricalRunner < MinitestRunner
  def split
    # make an api call to CI and get each test files run time
    # from previous build to make better worker scheduling
  end
end