FEAT(multi-arch): add support for multi arch

gitlab-ci builds now for armv7, arm64v8 and amd64

.gitlab-ci.yml

-image: python:3.9
+image: docker:stable
+variables:
+  DOCKER_HOST: tcp://docker:2375/
+  DOCKER_TLS_CERTDIR: ""
 
 stages:
   - test
@@ -19,6 +22,7 @@ stages:
       - Dockerfile
 
 run_test_cases:
+  image: python:3.9
   stage: test
   before_script:
     - *install_requirements
@@ -31,6 +35,7 @@ run_test_cases:
       junit: report.xml
 
 check_coverage:
+  image: python:3.9
   stage: test
   needs: ["run_test_cases"]
   before_script:
@@ -46,6 +51,7 @@ check_coverage:
         path: coverage.xml
 
 check_style:
+  image: python:3.9
   stage: test
   needs: ["run_test_cases"]
   before_script:
@@ -54,53 +60,55 @@ check_style:
   script:
     - make lint
     - make spell
-# docker-push:
-#   # Use the official docker image.
-#   image: docker:latest
-#   stage: release
-#   variables:
-#     # the name of the image without version
-#     AURA_IMAGE_NAME: "autoradio/engine-recorder"
-#   services:
-#     - docker:dind
-#   before_script:
-#     # default repo is docker.io (aka docker hub)
-#     - docker login -u "$DOCKER_ID" -p "$DOCKER_HUB_AUTH"
-#   script:
-#     # every commit on main branch should build image as unstable
-#     # else it is from a tag (enforced by gitlab-ci rules)
-#     # hint: tags are references independent of branches
-#     - |
-#       if [ "$CI_COMMIT_BRANCH" == "$CI_DEFAULT_BRANCH" ]
-#         then docker build -t $AURA_IMAGE_NAME:unstable .
-#         else docker build -t $AURA_IMAGE_NAME -t $AURA_IMAGE_NAME:$CI_COMMIT_TAG .
-#       fi
-#     # TODO: maybe isolate docker build and docker push
-#     - docker push "$AURA_IMAGE_NAME" --all-tags
-#   rules:
-#     # - *release-rules
-#     - if: $CI_COMMIT_TAG =~ /^\d+[.]\d+[.]\d+$/ || $CI_COMMIT_TAG =~ /^\d+[.]\d+[.]\d+[-]\S+$/
-#       exists:
-#         - Dockerfile
-#     # every commit on master/main branch should trigger a push to docker-hub as unstable without a release
-#     - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
-#       exists:
-#         - Dockerfile
 
-# release_job:
-#   stage: release
-#   needs:
-#     - docker-push
-#   image: registry.gitlab.com/gitlab-org/release-cli:latest
-#   rules:
-#     # - *release-rules
-#     - if: $CI_COMMIT_TAG =~ /^\d+[.]\d+[.]\d+$/ || $CI_COMMIT_TAG =~ /^\d+[.]\d+[.]\d+[-]\S+$/
-#       exists:
-#         - Dockerfile
-#   script:
-#     - echo "this will be a release when there is a tag, but tags should be protected to be only createable by maintainers."
-#   release:
-#     name: 'Release $CI_COMMIT_TAG'
-#     description: ./CHANGELOG
-#     tag_name: '$CI_COMMIT_TAG'
-#     ref: '$CI_COMMIT_TAG'
+docker-push:
+  # Use the docker image with buildx support for multi arch.
+  image: jdrouet/docker-with-buildx:20.10.21-0.9.1
+  stage: release
+  variables:
+    # the name of the image without version
+    AURA_IMAGE_NAME: "autoradio/engine-recorder"
+  services:
+    - docker:20.10.21-dind
+
+  before_script:
+    # default repo is docker.io (aka docker hub)
+    - docker login -u "$DOCKER_ID" -p "$DOCKER_HUB_AUTH"
+    - docker buildx create --use
+  script:
+    # every commit on main branch should build image as unstable
+    # else it is from a tag (enforced by gitlab-ci rules)
+    # hint: tags are references independent of branches
+    - |
+      if [ "$CI_COMMIT_BRANCH" == "$CI_DEFAULT_BRANCH" ]
+        then docker buildx build --platform linux/arm/v7,linux/arm64/v8,linux/amd64 -t $AURA_IMAGE_NAME:unstable .
+        else docker buildx build --platform linux/arm/v7,linux/arm64/v8,linux/amd64 -t $AURA_IMAGE_NAME -t $AURA_IMAGE_NAME:$CI_COMMIT_TAG .
+      fi
+    - docker push "$AURA_IMAGE_NAME" --all-tags
+  rules:
+    # - *release-rules
+    - if: $CI_COMMIT_TAG =~ /^\d+[.]\d+[.]\d+$/ || $CI_COMMIT_TAG =~ /^\d+[.]\d+[.]\d+[-]\S+$/
+      exists:
+        - Dockerfile
+    # every commit on master/main branch should trigger a push to docker-hub as unstable without a release
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
+      exists:
+        - Dockerfile
+
+release_job:
+   stage: release
+   needs:
+     - docker-push
+   image: registry.gitlab.com/gitlab-org/release-cli:latest
+   rules:
+     # - *release-rules
+     - if: $CI_COMMIT_TAG =~ /^\d+[.]\d+[.]\d+$/ || $CI_COMMIT_TAG =~ /^\d+[.]\d+[.]\d+[-]\S+$/
+       exists:
+         - Dockerfile
+   script:
+     - echo "this will be a release when there is a tag, but tags should be protected to be only createable by maintainers."
+   release:
+     name: 'Release $CI_COMMIT_TAG'
+     description: ./CHANGELOG
+     tag_name: '$CI_COMMIT_TAG'
+     ref: '$CI_COMMIT_TAG'