Allow updating merged results pipelines and merge trains via API

Changelog: changed

ee/lib/ee/api/entities/project.rb

@@ -39,6 +39,8 @@ module EE
           end
           expose :issues_template, if: ->(project, _) { project.feature_available?(:issuable_default_templates) }
           expose :merge_requests_template, if: ->(project, _) { project.feature_available?(:issuable_default_templates) }
+          expose :merge_pipelines_enabled?, as: :merge_pipelines_enabled, if: ->(project, _) { project.feature_available?(:merge_pipelines) }
+          expose :merge_trains_enabled?, as: :merge_trains_enabled, if: ->(project, _) { project.feature_available?(:merge_pipelines) }
         end
       end
     end

ee/lib/ee/api/helpers/projects_helpers.rb

@@ -35,6 +35,8 @@ module EE
             optional :fallback_approvals_required, type: Integer, desc: 'Overall approvals required when no rule is present'
             optional :issues_template, type: String, desc: 'Default description for Issues. Description is parsed with GitLab Flavored Markdown.'
             optional :merge_requests_template, type: String, desc: 'Default description for merge requests. Description is parsed with GitLab Flavored Markdown.'
+            optional :merge_pipelines_enabled, type: Grape::API::Boolean, desc: 'Enable merged results pipelines.'
+            optional :merge_trains_enabled, type: Grape::API::Boolean, desc: 'Enable merge trains.'
           end
         end
 
@@ -53,7 +55,9 @@ module EE
               :fallback_approvals_required,
               :import_url,
               :issues_template,
-              :merge_requests_template
+              :merge_requests_template,
+              :merge_pipelines_enabled,
+              :merge_trains_enabled
             ]
           end
         end

ee/lib/ee/api/projects.rb

@@ -83,6 +83,7 @@ module EE
 
             verify_mirror_attrs!(project, attrs)
             verify_issuable_default_templates_attrs!(project, attrs)
+            verify_merge_pipelines_attrs!(project, attrs)
           end
 
           def verify_mirror_attrs!(project, attrs)
@@ -100,6 +101,13 @@ module EE
             end
           end
 
+          def verify_merge_pipelines_attrs!(project, attrs)
+            return if can?(current_user, :admin_project, project)
+
+            attrs.delete(:merge_pipelines_enabled) unless project.feature_available?(:merge_pipelines)
+            attrs.delete(:merge_trains_enabled) unless project.feature_available?(:merge_trains)
+          end
+
           def check_audit_events_available!(project)
             forbidden! unless project.feature_available?(:audit_events)
           end

ee/spec/requests/api/projects_spec.rb

@@ -303,6 +303,60 @@ RSpec.describe API::Projects do
         expect(json_response).not_to have_key 'merge_requests_template'
       end
     end
+
+    context 'merge pipelines feature is available' do
+      before do
+        stub_licensed_features(merge_pipelines: true)
+      end
+
+      it 'returns merge pipelines enabled flag' do
+        subject
+
+        expect(response).to have_gitlab_http_status(:ok)
+        expect(json_response).to have_key 'merge_pipelines_enabled'
+      end
+    end
+
+    context 'merge pipelines feature not available' do
+      before do
+        stub_licensed_features(merge_pipelines: false)
+      end
+
+      it 'does not return merge pipelines enabled flag' do
+        subject
+
+        expect(response).to have_gitlab_http_status(:ok)
+        expect(json_response).not_to have_key 'merge_pipelines_enabled'
+      end
+    end
+
+    context 'merge trains feature is available' do
+      before do
+        stub_licensed_features(merge_pipelines: true, merge_trains: true)
+        project.update!(merge_pipelines_enabled: true, merge_trains_enabled: true)
+        stub_feature_flags(disable_merge_trains: false)
+      end
+
+      it 'returns merge trains enabled flag' do
+        subject
+
+        expect(response).to have_gitlab_http_status(:ok)
+        expect(json_response).to have_key 'merge_trains_enabled'
+      end
+    end
+
+    context 'merge trains feature not available' do
+      before do
+        stub_licensed_features(merge_trains: false)
+      end
+
+      it 'does not return merge trains enabled flag' do
+        subject
+
+        expect(response).to have_gitlab_http_status(:ok)
+        expect(json_response).not_to have_key 'merge_trains_enabled'
+      end
+    end
   end
 
   # Assumes the following variables are defined:
@@ -891,6 +945,102 @@ RSpec.describe API::Projects do
       end
     end
 
+    context 'merge pipelines feature is available' do
+      before do
+        stub_licensed_features(merge_pipelines: true)
+      end
+
+      let(:project_params) { { merge_pipelines_enabled: true } }
+
+      it 'updates the content' do
+        expect { subject }.to change { project.reload.merge_pipelines_enabled }
+
+        expect(response).to have_gitlab_http_status(:ok)
+        expect(project.merge_pipelines_enabled).to eq(project_params[:merge_pipelines_enabled])
+        expect(json_response['merge_pipelines_enabled']).to eq(project_params[:merge_pipelines_enabled])
+      end
+
+      context 'when user does not have permission' do
+        let(:developer_user) { create(:user) }
+
+        before do
+          project.add_developer(developer_user)
+        end
+
+        it 'does not update the content' do
+          expect do
+            put api("/projects/#{project.id}", developer_user), params: project_params
+          end.not_to change { project.reload.merge_pipelines_enabled }
+
+          expect(response).to have_gitlab_http_status(:forbidden)
+        end
+      end
+    end
+
+    context 'merge pipelines feature feature not available' do
+      before do
+        stub_licensed_features(merge_pipelines: false)
+      end
+
+      let(:project_params) { { merge_pipelines_enabled: true } }
+
+      it 'does not update the content' do
+        subject
+
+        expect(response).to have_gitlab_http_status(:ok)
+        expect(json_response).not_to have_key 'merge_pipelines_enabled'
+      end
+    end
+
+    context 'merge trains feature is available' do
+      before do
+        stub_licensed_features(merge_pipelines: true, merge_trains: true)
+        project.update!(merge_pipelines_enabled: true, merge_trains_enabled: false)
+        stub_feature_flags(disable_merge_trains: false)
+      end
+
+      let(:project_params) { { merge_trains_enabled: true } }
+
+      it 'updates the content' do
+        expect { subject }.to change { project.reload.merge_trains_enabled }
+
+        expect(response).to have_gitlab_http_status(:ok)
+        expect(project.merge_trains_enabled).to eq(project_params[:merge_trains_enabled])
+        expect(json_response['merge_trains_enabled']).to eq(project_params[:merge_trains_enabled])
+      end
+
+      context 'when user does not have permission' do
+        let(:developer_user) { create(:user) }
+
+        before do
+          project.add_developer(developer_user)
+        end
+
+        it 'does not update the content' do
+          expect do
+            put api("/projects/#{project.id}", developer_user), params: project_params
+          end.not_to change { project.reload.merge_trains_enabled }
+
+          expect(response).to have_gitlab_http_status(:forbidden)
+        end
+      end
+    end
+
+    context 'merge trains feature feature not available' do
+      before do
+        stub_licensed_features(merge_trains: false)
+      end
+
+      let(:project_params) { { merge_trains_enabled: true } }
+
+      it 'does not update the content' do
+        expect { subject }.not_to change { project.merge_trains_enabled }
+
+        expect(response).to have_gitlab_http_status(:ok)
+        expect(json_response).not_to have_key 'merge_trains_enabled'
+      end
+    end
+
     context 'when updating external classification' do
       before do
         enable_external_authorization_service_check

lib/api/helpers/projects_helpers.rb

@@ -132,7 +132,10 @@ module API
           :forking_access_level,
           :issues_access_level,
           :lfs_enabled,
+          :merge_pipelines_enabled,
           :merge_requests_access_level,
+          :merge_requests_template,
+          :merge_trains_enabled,
           :merge_method,
           :name,
           :only_allow_merge_if_all_discussions_are_resolved,

spec/requests/api/project_attributes.yml

@@ -89,6 +89,8 @@ ci_cd_settings:
     - group_runners_enabled
     - merge_pipelines_enabled
     - merge_trains_enabled
+    - merge_pipelines_enabled
+    - merge_trains_enabled
     - auto_rollback_enabled
   remapped_attributes:
     default_git_depth: ci_default_git_depth