Add Danger and update CODEOWNERS

  script:

    - rake verify

danger-review:

  image: ruby:3.0

  stage: test

  except:

    - tags

    - master

  before_script:

    - bundle install

  script:

    - bundle exec danger --fail-on-errors=true --verbose

deploy:

  stage: deploy

  script:

* @andrewn @ayufan @reprazent

* @andrewn @ayufan @reprazent @mkaeppler

# frozen_string_literal: true

require 'gitlab-dangerfiles'

gitlab_dangerfiles = Gitlab::Dangerfiles::Engine.new(self)

gitlab_dangerfiles.import_plugins

gitlab_dangerfiles.import_dangerfiles

danger.import_plugin('danger/plugins/*.rb')

danger.import_dangerfile(path: File.join('danger', 'roulette'))

# frozen_string_literal: true

module Danger

  # Common helper functions for danger scripts

  class ProjectHelper < ::Danger::Plugin

    def changes

      # We do not need to categorize files in this code base

      helper.changes([])

    end

    def project_name

      "labkit-ruby"

    end

  end

end

# frozen_string_literal: true

MESSAGE = <<MARKDOWN

## Reviewer roulette

Changes that require review have been detected! A merge request is normally

reviewed by both a reviewer and a maintainer in its primary category and by a

maintainer in all other categories.

MARKDOWN

TABLE_MARKDOWN = <<MARKDOWN

To spread load more evenly across eligible reviewers, Danger has picked a candidate for each

review slot. Feel free to

[override these selections](https://about.gitlab.com/handbook/engineering/projects/#labkit-ruby)

if you think someone else would be better-suited

or request help in the `#labkit` Slack channel.

To read more on how to use the reviewer roulette, please take a look at the

[Engineering workflow](https://about.gitlab.com/handbook/engineering/workflow/#basics)

and [code review guidelines](https://docs.gitlab.com/ee/development/code_review.html).

Once you've decided who will review this merge request, mention them as you

normally would! Danger does not automatically notify them for you.

| Reviewer | Maintainer |

| -------- | ---------- |

MARKDOWN

def note_for_spins_role(spins, role)

  spins.each do |spin|

    note = note_for_spin_role(spin, role)

    return note if note

  end

  'No %{role} available' % { role: role }

end

def note_for_spin_role(spin, role)

  spin.public_send(role)&.markdown_name(author: roulette.team_mr_author) # rubocop:disable GitlabSecurity/PublicSend

end

def markdown_row_for_spins(spins_array)

  reviewer_note = note_for_spins_role(spins_array, :reviewer)

  maintainer_note = note_for_spins_role(spins_array, :maintainer)

  "#{reviewer_note} | #{maintainer_note} |"

end

if project_helper.changes.any?

  project = project_helper.project_name

  random_roulette_spins = roulette.spin(project, [nil], timezone_experiment: false)

  rows = random_roulette_spins.map do |spin|

    markdown_row_for_spins([spin])

  end

  markdown(MESSAGE)

  markdown(TABLE_MARKDOWN + rows.join("\n")) unless rows.empty?

end