style testing in CI

.gitlab-ci.yml

 stages:
+  - style
   - test
 
+flake8:
+  stage: style
+  image: "docker-registry.esrf.fr/dau/ewoks:python_3.7"
+  before_script:
+    - pip install flake8
+  script:
+    - flake8
+
+black:
+  stage: style
+  image: "docker-registry.esrf.fr/dau/ewoks:python_3.7"
+  before_script:
+    - pip install black
+  script:
+    - LC_ALL=C.UTF-8 black --check --safe .
+
 test:
   stage: test
-  image: python:3.6
+  image: "docker-registry.esrf.fr/dau/ewoks:python_3.7"
   before_script:
     - pip install pytest-cov
     - pip install .[test]
   script:
     - pytest --cov=./ .
-  only:
-    refs:
-      - main
-      - merge_requests

setup.cfg

@@ -25,3 +25,13 @@ mx =
     pymongo
 test = 
     pytest
+    mongita
+    black
+
+# E501 (line too long) ignored for now
+# E203 and W503 incompatible with black formatting (https://black.readthedocs.io/en/stable/compatible_configs.html#flake8)
+[flake8]
+ignore = E501, E203, W503
+max-line-length = 88
+exclude = 
+    .eggs