add auto-format-code (#1142)

* add auto-format-code
* add github remote
* add GITHUB_TOKEN to the remove url
* select Yunohost:dev
* force push as it's only a code format
* pull before running black
* working on a clean directory
* pull before push? /o\
* do not clone single branch
* a last one?
* only on dev branch

.gitlab/ci/lint.gitlab-ci.yml

@@ -24,4 +24,24 @@ format-check:
   needs: []
   allow_failure: true
   script:
-    - tox -e py37-black
+    - tox -e py37-black-check
+
+format-run:
+  stage: lint
+  image: "before-install"
+  needs: []
+  before_script:
+    - apt-get update -y && apt-get install git hub -y
+    - git config --global user.email "yunohost@yunohost.org"
+    - git config --global user.name "$GITHUB_USER"
+    - hub clone --branch ${CI_COMMIT_REF_NAME} "https://$GITHUB_TOKEN:x-oauth-basic@github.com/YunoHost/yunohost.git" github_repo
+    - cd github_repo
+  script:
+    # checkout or create and checkout the branch
+    - hub checkout "ci-format-${CI_COMMIT_REF_NAME}" || hub checkout -b "ci-format-${CI_COMMIT_REF_NAME}"
+    - tox -e py37-black-run
+    - hub commit -am "[CI] Format code" || true
+    - hub pull-request -m "[CI] Format code" -b Yunohost:dev -p || true # GITHUB_USER and GITHUB_TOKEN registered here https://gitlab.com/yunohost/yunohost/-/settings/ci_cd
+  only:
+      refs:
+        - dev

tox.ini

@@ -1,12 +1,13 @@
 [tox]
-envlist = py37-{lint,invalidcode},py37-black
+envlist = py37-{lint,invalidcode},py37-black-{run,check}
 
 [testenv]
 skip_install=True
 deps =
   py37-{lint,invalidcode}: flake8
-  py37-black: black
+  py37-black-{run,check}: black
 commands =
         py37-lint: flake8 src doc data tests --ignore E402,E501 --exclude src/yunohost/vendor
         py37-invalidcode: flake8 src data --exclude src/yunohost/tests,src/yunohost/vendor --select F
-        py37-black: black --check --diff src doc data tests
+        py37-black-check: black --check --diff src doc data tests
+        py37-black-run: black src doc data tests