feat: use open-source/gitlab-ci-templates in cube skeleton

--HG--
branch : 3.32

cubicweb/skeleton/.gitlab-ci.yml.tmpl

+---
 default:
-  image: python
-
-# avoid running duplicate pipelines for both topic head and MR
-# see: https://docs.gitlab.com/ee/ci/yaml/#switch-between-branch-pipelines-and-merge-request-pipelines
-workflow:
-  rules:
-    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
-    - if: '$CI_COMMIT_REF_NAME =~ /^topic\/.*/  && $CI_OPEN_MERGE_REQUESTS'
-      when: never
-    - when: always
+  image: python:3.7
+
+include:
+  - project: "open-source/gitlab-ci-templates"
+    ref: "branch/default"
+    file:
+      - "templates/no-duplicated-ci-pipelines.yml"  # use workflow to avoid duplicated pipelines
+      - "templates/lint/flake8.yml"  # will do the equivalent of 'tox -e flake8'
+      - "templates/lint/black.yml"  # will do the equivalent of 'tox -e black'
+      - "templates/lint/check-manifest.yml"  # will do the equivalent of 'tox -e check-manifest'
+      - "templates/lint/yamllint.yml"  # will do the equivalent of 'tox -e yamllint'
+      - "templates/tests/py3.yml"  # will do the equivalent of 'tox -e py3'
+      - "templates/create-release-on-heptapod.yml"  # this will create a release on heptapod
+      - "templates/upload-to-pypi.yml"  # on a new mercurial tag (expected to be done with release-new), will push a release on pypi
+      # - "templates/lint/mypy.yml"  # will do the equivalent of 'tox -e mypy'
+      # - "templates/upload-python-package-to-heptapod.yml"  # upload the package to heptapod registry on new tag
 
 stages:
   - lint
   - tests
-  - after-tests
-
-before_script:
-  - pip install tox
-
-flake8:
-  stage: lint
-  script: tox -e flake8
-
-check-manifest:
-  stage: lint
-  script: tox -e check-manifest
-
-black:
-  stage: lint
-  script: tox -e black
-
-yamllint:
-  rules:
-    - changes:
-        - "**/*.yaml"
-        - "**/*.yml"
-  stage: lint
-  before_script:
-    - pip install tox
-  script:
-    - tox -e yamllint
-
-# If you have mypy set up
-# mypy:
-#   stage: lint
-#   script: tox -e mypy
-
-py3:
-  stage: tests
-  script: tox -e py3
-
-# If you have your project on readthedocs, you can automatically trigger its
-# build by setting:
-# - READTHEDOCS_TOKEN
-# - READTHEDOCS_ID
-# in your heptapod project Settings > CI/CD > Variables.
-# You can find those secrets by creating a new integration in your readthedocs
-# project here: https://readthedocs.org/dashboard/cubicweb_%(cubename)s/integrations/
-#
-# Related documentation:
-# https://docs.readthedocs.io/en/latest/webhooks.html#using-the-generic-api-integration
-#
-# trigger-readthedocs:
-#   only:
-#     refs:
-#       - branch/default
-#   stage: after-tests
-#   script:
-#   # regarding the " everywhere when there is a '%%': yaml is extremly weird when %% are involved
-#   - curl -X POST -d "token=${READTHEDOCS_TOKEN}" https://readthedocs.org/api/v2/webhook/cubicweb_%(cubename)s/${READTHEDOCS_ID} -w "\nhttp code:"\ "%%{http_code}\n" -f
+  - release
+  - publish