ci for debian packaging

.gitlab-ci.yml

-default:
+stages:
+  - test
+  - debian-build
+  - release
+
+.default:
   image: python:${PYTHON_VERSION}-slim-${DEBIAN_VERSION}
   before_script:
     - python --version
@@ -7,6 +12,8 @@ default:
 
 pytest:
   stage: test
+  image: !reference [.default,image]
+  before_script: !reference [.default,before_script]
   script:
     - pytest --cov-report=term-missing --junitxml=pytest.xml
   coverage: '/^TOTAL.+ ([1-9]?[0-9]%|100%)$/'
@@ -21,3 +28,61 @@ pytest:
         DEBIAN_VERSION: ['stretch', 'buster', 'bullseye']
       - PYTHON_VERSION: ['3.8', '3.9', '3.10']
         DEBIAN_VERSION: ['buster', 'bullseye']
+
+create-debian-packages:
+  image: debian:$DEBIAN_VERSION
+  stage: debian-build
+  rules:
+    - if: $CI_COMMIT_BRANCH =~ /^debian.*$/
+    - if: $CI_COMMIT_TAG =~ /^debian\/.*$/
+  variables:
+    DEBIAN_VERSION: "bookworm"
+    DEBIAN_FRONTEND: "noninteractive"
+    DEBIAN_PRIORITY: "critical"
+    DEBCONF_NOWARNINGS: "yes"
+  before_script:
+    - apt-get update
+    - apt-get -y install git
+    - apt-get -y install dpkg-dev fakeroot lintian python3-sphinx python-all debhelper po-debconf dh-make python3-all python3-setuptools dh-python python3-sphinx-rtd-theme tree
+    # Get the tag name, or the commit
+    - COMMIT_OR_TAG="${CI_COMMIT_TAG:-$CI_COMMIT_SHA}"
+    # Remove / from the tagname as it is used in file name later
+    - export COMMIT_OR_TAG=$(echo $COMMIT_OR_TAG | sed 's#/#-#g')
+    # Save this variable for the release job
+    - echo "COMMIT_OR_TAG=$COMMIT_OR_TAG" >> job.env
+  script:
+    # Building the debian package.
+    - dpkg-buildpackage -b -rfakeroot -us -uc
+    - mv ../*.deb ../*.buildinfo ../*.changes . && tar cvf procset-${COMMIT_OR_TAG}.tar.gz *.deb *.buildinfo *.changes
+  after_script:
+    - echo "JOB_ID=$CI_JOB_ID" >> job.env
+  artifacts:
+     paths:
+       # Since I can't use the variable create in *_script here, I use a wildcard
+       - procset-*.tar.gz
+     expire_in: never
+     reports:
+       dotenv: job.env
+
+# Release job for the debian package, it relies on the artifacts of create-debian-packages.
+release-for-debian:
+  stage: release
+  rules:
+    - if: $CI_COMMIT_TAG =~ /^debian\/.*$/
+  needs:
+    # We want the test to pass
+    - job: pytest
+    - job: create-debian-packages
+      artifacts: true
+  image: registry.gitlab.com/gitlab-org/release-cli:latest
+  script:
+    - echo 'running release_job for $CI_COMMIT_TAG'
+  release:
+    name: 'Release $CI_COMMIT_TAG'
+    description: 'Created using the release-cli'
+    tag_name: '$CI_COMMIT_TAG'
+    ref: '$CI_COMMIT_TAG'
+    assets:
+      links:
+        - name: procset-${COMMIT_OR_TAG}.tar.gz
+          url: https://gitlab.inria.fr/adfaure/procset.py/-/jobs/${JOB_ID}/artifacts/raw/procset-${COMMIT_OR_TAG}.tar.gz