1 files changed, 59 insertions, 0 deletions
diff --git a/tooling/gitlab_danger.rb b/tooling/gitlab_danger.rb
new file mode 100644
index 00000000000..d20d3499641
--- /dev/null
+++ b/tooling/gitlab_danger.rb
@@ -0,0 +1,59 @@
+# frozen_string_literal: true
+
+# rubocop:todo Gitlab/NamespacedClass
+class GitlabDanger
+  LOCAL_RULES ||= %w[
+    changes_size
+    commit_messages
+    database
+    documentation
+    duplicate_yarn_dependencies
+    eslint
+    karma
+    pajamas
+    pipeline
+    prettier
+    product_intelligence
+    utility_css
+  ].freeze
+
+  CI_ONLY_RULES ||= %w[
+    ce_ee_vue_templates
+    changelog
+    ci_templates
+    metadata
+    feature_flag
+    roulette
+    sidekiq_queues
+    specialization_labels
+    specs
+  ].freeze
+
+  MESSAGE_PREFIX = '==>'.freeze
+
+  attr_reader :gitlab_danger_helper
+
+  def initialize(gitlab_danger_helper)
+    @gitlab_danger_helper = gitlab_danger_helper
+  end
+
+  def self.local_warning_message
+    "#{MESSAGE_PREFIX} Only the following Danger rules can be run locally: #{LOCAL_RULES.join(', ')}"
+  end
+
+  def self.success_message
+    "#{MESSAGE_PREFIX} No Danger rule violations!"
+  end
+
+  def rule_names
+    ci? ? LOCAL_RULES | CI_ONLY_RULES : LOCAL_RULES
+  end
+
+  def html_link(str)
+    self.ci? ? gitlab_danger_helper.html_link(str) : str
+  end
+
+  def ci?
+    !gitlab_danger_helper.nil?
+  end
+end