Merge branch 'rs-release-automation-danger' into 'master'

Exempt release automation MRs from Danger rules

Closes gitlab-org/release/framework#269

See merge request gitlab-org/gitlab-ce!26993

Dangerfile

 danger.import_plugin('danger/plugins/helper.rb')
-danger.import_dangerfile(path: 'danger/metadata')
-danger.import_dangerfile(path: 'danger/changes_size')
-danger.import_dangerfile(path: 'danger/changelog')
-danger.import_dangerfile(path: 'danger/specs')
-danger.import_dangerfile(path: 'danger/gemfile')
-danger.import_dangerfile(path: 'danger/database')
-danger.import_dangerfile(path: 'danger/documentation')
-danger.import_dangerfile(path: 'danger/frozen_string')
-danger.import_dangerfile(path: 'danger/commit_messages')
-danger.import_dangerfile(path: 'danger/duplicate_yarn_dependencies')
-danger.import_dangerfile(path: 'danger/prettier')
-danger.import_dangerfile(path: 'danger/eslint')
-danger.import_dangerfile(path: 'danger/roulette')
-danger.import_dangerfile(path: 'danger/single_codebase')
-danger.import_dangerfile(path: 'danger/gitlab_ui_wg')
+
+unless helper.release_automation?
+  danger.import_dangerfile(path: 'danger/metadata')
+  danger.import_dangerfile(path: 'danger/changes_size')
+  danger.import_dangerfile(path: 'danger/changelog')
+  danger.import_dangerfile(path: 'danger/specs')
+  danger.import_dangerfile(path: 'danger/gemfile')
+  danger.import_dangerfile(path: 'danger/database')
+  danger.import_dangerfile(path: 'danger/documentation')
+  danger.import_dangerfile(path: 'danger/frozen_string')
+  danger.import_dangerfile(path: 'danger/commit_messages')
+  danger.import_dangerfile(path: 'danger/duplicate_yarn_dependencies')
+  danger.import_dangerfile(path: 'danger/prettier')
+  danger.import_dangerfile(path: 'danger/eslint')
+  danger.import_dangerfile(path: 'danger/roulette')
+  danger.import_dangerfile(path: 'danger/single_codebase')
+  danger.import_dangerfile(path: 'danger/gitlab_ui_wg')
+end

lib/gitlab/danger/helper.rb

@@ -7,6 +7,7 @@ require_relative 'teammate'
 module Gitlab
   module Danger
     module Helper
+      RELEASE_TOOLS_BOT = 'gitlab-release-tools-bot'
       ROULETTE_DATA_URL = URI.parse('https://about.gitlab.com/roulette.json').freeze
       # Returns a list of all files that have been added, modified or renamed.
@@ -40,6 +41,10 @@ module Gitlab
         ENV['CI_PROJECT_NAME'] == 'gitlab-ee' || File.exist?('../../CHANGELOG-EE.md')
       end
+      def release_automation?
+        gitlab.mr_author == RELEASE_TOOLS_BOT
+      end
+
       def project_name
         ee? ? 'gitlab-ee' : 'gitlab-ce'
       end