Add housekeeping endpoint for Projects API

changelogs/unreleased/27032-add-a-house-keeping-api-call.yml

+---
+title: Add housekeeping endpoint for Projects API
+merge_request: 9421
+author:

doc/api/projects.md

@@ -1195,3 +1195,17 @@ Parameters:
 | `query` | string | yes | A string contained in the project name |
 | `order_by` | string | no | Return requests ordered by `id`, `name`, `created_at` or `last_activity_at` fields |
 | `sort` | string | no | Return requests sorted in `asc` or `desc` order |
+
+## Start the Housekeeping task for a Project
+
+>**Note:** This feature was introduced in GitLab 9.0
+
+```
+POST /projects/:id/housekeeping
+```
+
+Parameters:
+
+| Attribute | Type | Required | Description |
+| --------- | ---- | -------- | ----------- |
+| `id` | integer/string | yes | The ID of the project or NAMESPACE/PROJECT_NAME |

lib/api/projects.rb

@@ -374,6 +374,19 @@ module API
 
         present paginate(users), with: Entities::UserBasic
       end
+
+      desc 'Start the housekeeping task for a project' do
+        detail 'This feature was introduced in GitLab 9.0.'
+      end
+      post ':id/housekeeping' do
+        authorize_admin_project
+
+        begin
+          ::Projects::HousekeepingService.new(user_project).execute
+        rescue ::Projects::HousekeepingService::LeaseTaken => error
+          conflict!(error.message)
+        end
+      end
     end
   end
 end

spec/requests/api/projects_spec.rb

@@ -1422,4 +1422,53 @@ describe API::Projects, api: true  do
       end
     end
   end
+
+  describe 'POST /projects/:id/housekeeping' do
+    let(:housekeeping) { Projects::HousekeepingService.new(project) }
+
+    before do
+      allow(Projects::HousekeepingService).to receive(:new).with(project).and_return(housekeeping)
+    end
+
+    context 'when authenticated as owner' do
+      it 'starts the housekeeping process' do
+        expect(housekeeping).to receive(:execute).once
+
+        post api("/projects/#{project.id}/housekeeping", user)
+
+        expect(response).to have_http_status(201)
+      end
+
+      context 'when housekeeping lease is taken' do
+        it 'returns conflict' do
+          expect(housekeeping).to receive(:execute).once.and_raise(Projects::HousekeepingService::LeaseTaken)
+
+          post api("/projects/#{project.id}/housekeeping", user)
+
+          expect(response).to have_http_status(409)
+          expect(json_response['message']).to match(/Somebody already triggered housekeeping for this project/)
+        end
+      end
+    end
+
+    context 'when authenticated as developer' do
+      before do
+        project_member2
+      end
+
+      it 'returns forbidden error' do
+        post api("/projects/#{project.id}/housekeeping", user3)
+
+        expect(response).to have_http_status(403)
+      end
+    end
+
+    context 'when unauthenticated' do
+      it 'returns authentication error' do
+        post api("/projects/#{project.id}/housekeeping")
+
+        expect(response).to have_http_status(401)
+      end
+    end
+  end
 end