Add "implements" to the default issue closing message regex

changelogs/unreleased/close-issue-by-implements.yml

+---
+title: "Add \"implements\" to the default issue closing message regex"
+merge_request: 14612
+author: Guilherme Vieira
+type: added

config/gitlab.yml.example

@@ -89,7 +89,7 @@ production: &base
     # This happens when the commit is pushed or merged into the default branch of a project.
     # When not specified the default issue_closing_pattern as specified below will be used.
     # Tip: you can test your closing pattern at http://rubular.com.
-    # issue_closing_pattern: '((?:[Cc]los(?:e[sd]?|ing)|[Ff]ix(?:e[sd]|ing)?|[Rr]esolv(?:e[sd]?|ing))(:?) +(?:(?:issues? +)?%{issue_ref}(?:(?:, *| +and +)?)|([A-Z][A-Z0-9_]+-\d+))+)'
+    # issue_closing_pattern: '((?:[Cc]los(?:e[sd]?|ing)|[Ff]ix(?:e[sd]|ing)?|[Rr]esolv(?:e[sd]?|ing)|[Ii]mplement(?:s|ed|ing)?)(:?) +(?:(?:issues? +)?%{issue_ref}(?:(?:, *| +and +)?)|([A-Z][A-Z0-9_]+-\d+))+)'
 
     ## Default project features settings
     default_projects_features:

config/initializers/1_settings.rb

@@ -257,7 +257,7 @@ Settings.gitlab['signup_enabled'] ||= true if Settings.gitlab['signup_enabled'].
 Settings.gitlab['password_authentication_enabled'] ||= true if Settings.gitlab['password_authentication_enabled'].nil?
 Settings.gitlab['restricted_visibility_levels'] = Settings.__send__(:verify_constant_array, Gitlab::VisibilityLevel, Settings.gitlab['restricted_visibility_levels'], [])
 Settings.gitlab['username_changing_enabled'] = true if Settings.gitlab['username_changing_enabled'].nil?
-Settings.gitlab['issue_closing_pattern'] = '((?:[Cc]los(?:e[sd]?|ing)|[Ff]ix(?:e[sd]|ing)?|[Rr]esolv(?:e[sd]?|ing))(:?) +(?:(?:issues? +)?%{issue_ref}(?:(?:, *| +and +)?)|([A-Z][A-Z0-9_]+-\d+))+)' if Settings.gitlab['issue_closing_pattern'].nil?
+Settings.gitlab['issue_closing_pattern'] = '((?:[Cc]los(?:e[sd]?|ing)|[Ff]ix(?:e[sd]|ing)?|[Rr]esolv(?:e[sd]?|ing)|[Ii]mplement(?:s|ed|ing)?)(:?) +(?:(?:issues? +)?%{issue_ref}(?:(?:, *| +and +)?)|([A-Z][A-Z0-9_]+-\d+))+)' if Settings.gitlab['issue_closing_pattern'].nil?
 Settings.gitlab['default_projects_features'] ||= {}
 Settings.gitlab['webhook_timeout'] ||= 10
 Settings.gitlab['max_attachment_size'] ||= 10

spec/lib/gitlab/closing_issue_extractor_spec.rb

@@ -254,6 +254,46 @@ describe Gitlab::ClosingIssueExtractor do
         expect(subject.closed_by_message(message)).to eq([issue])
       end
 
+      it do
+        message = "Implement: #{reference}"
+        expect(subject.closed_by_message(message)).to eq([issue])
+      end
+
+      it do
+        message = "Implements: #{reference}"
+        expect(subject.closed_by_message(message)).to eq([issue])
+      end
+
+      it do
+        message = "Implemented: #{reference}"
+        expect(subject.closed_by_message(message)).to eq([issue])
+      end
+
+      it do
+        message = "Implementing: #{reference}"
+        expect(subject.closed_by_message(message)).to eq([issue])
+      end
+
+      it do
+        message = "implement: #{reference}"
+        expect(subject.closed_by_message(message)).to eq([issue])
+      end
+
+      it do
+        message = "implements: #{reference}"
+        expect(subject.closed_by_message(message)).to eq([issue])
+      end
+
+      it do
+        message = "implemented: #{reference}"
+        expect(subject.closed_by_message(message)).to eq([issue])
+      end
+
+      it do
+        message = "implementing: #{reference}"
+        expect(subject.closed_by_message(message)).to eq([issue])
+      end
+
       context 'with an external issue tracker reference' do
         it 'extracts the referenced issue' do
           jira_project = create(:jira_project, name: 'JIRA_EXT1')