.gitlab-ci.yml: Add job to analyze project code quality with Code Climate CLI

See #431

.gitlab-ci.yml

@@ -185,6 +185,28 @@ docs:
 #                    Post stage                     #
 #####################################################
 
+# Check code quality with codeclimate
+# This needs some refactoring; we probably just want to provide the codeclimate.json directly
+# as an output of radon, with some conversion
+#
+codequality:
+  image: docker:stable
+  stage: post
+  variables:
+    DOCKER_DRIVER: overlay2
+  allow_failure: true
+  services:
+    - docker:stable-dind
+  script:
+    - export SP_VERSION=$(echo "$CI_SERVER_VERSION" | sed 's/^\([0-9]*\)\.\([0-9]*\).*/\1-\2-stable/')
+    - docker run
+        --env SOURCE_CODE="$PWD"
+        --volume "$PWD":/code
+        --volume /var/run/docker.sock:/var/run/docker.sock
+        "registry.gitlab.com/gitlab-org/security-products/codequality:$SP_VERSION" /code
+  artifacts:
+    paths: [codeclimate.json]
+
 # Collate coverage reports
 #
 coverage: