Added keep artifacts API endpoint

doc/api/builds.md

@@ -443,3 +443,53 @@ Example of response
     "user": null
 }
 ```
+
+## Keep artifacts
+
+Prevents artifacts from being deleted when expiration is set
+
+```
+POST /projects/:id/builds/:build_id/artifacts/keep
+```
+
+Parameters
+
+| Attribute   | Type    | required | Description         |
+|-------------|---------|----------|---------------------|
+| `id`        | integer | yes      | The ID of a project |
+| `build_id`  | integer | yes      | The ID of a build   |
+
+Example of request
+
+```
+curl -X POST -H "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" "https://gitlab.example.com/api/v3/projects/1/builds/1/artifacts/keep"
+```
+
+Example of response
+
+```json
+{
+    "commit": {
+        "author_email": "admin@example.com",
+        "author_name": "Administrator",
+        "created_at": "2015-12-24T16:51:14.000+01:00",
+        "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
+        "message": "Test the CI integration.",
+        "short_id": "0ff3ae19",
+        "title": "Test the CI integration."
+    },
+    "coverage": null,
+    "download_url": null,
+    "id": 69,
+    "name": "rubocop",
+    "ref": "master",
+    "runner": null,
+    "stage": "test",
+    "created_at": "2016-01-11T10:13:33.506Z",
+    "started_at": "2016-01-11T10:13:33.506Z",
+    "finished_at": "2016-01-11T10:15:10.506Z",
+    "status": "failed",
+    "tag": false,
+    "user": null
+}
+```

lib/api/builds.rb

@@ -166,6 +166,25 @@ module API
         present build, with: Entities::Build,
                        user_can_download_artifacts: can?(current_user, :download_build_artifacts, user_project)
       end
+
+      # Keep the artifacts to prevent them to be deleted
+      #
+      # Parameters:
+      #   id (required) - The ID of a build
+      # Example Request:
+      #   POST /projects/:id/builds/:build_id/artifacts/keep
+      post ':id/builds/:build_id/artifacts/keep' do
+        authorize_update_builds!
+
+        build = get_build(params[:build_id])
+        return not_found!(build) unless build && build.artifacts?
+
+        build.keep_artifacts!
+
+        status 200
+        present build, with: Entities::Build,
+                user_can_download_artifacts: can?(current_user, :read_build, user_project)
+      end
     end
 
     helpers do

spec/requests/api/builds_spec.rb

@@ -241,4 +241,31 @@ describe API::API, api: true  do
       end
     end
   end
+
+  describe 'POST /projects/:id/builds/:build_id/artifacts/keep' do
+    before do
+      post api("/projects/#{project.id}/builds/#{build.id}/artifacts/keep", user)
+    end
+
+    context 'artifacts did not expire' do
+      let(:build) do
+        create(:ci_build, :trace, :artifacts, :success,
+               project: project, pipeline: pipeline, artifacts_expire_at: Time.now + 7.days)
+      end
+
+      it 'should keep artifacts' do
+        expect(response.status).to eq 200
+        build.reload
+        expect(build.artifacts_expire_at).to be_nil
+      end
+    end
+
+    context 'no artifacts' do
+      let(:build) { create(:ci_build, project: project, pipeline: pipeline) }
+
+      it 'should respond with not found' do
+        expect(response.status).to eq 404
+      end
+    end
+  end
 end