gitlab-ci-docker.yml

# When semantic release is integrated, this stage run on main pipeline
# When semantic release is not integrated, this stage only run when you put a new tag to the git repository (a good tag format would be x.x.x ex: 1.0.2, see https://semver.org/)
# In both cases, it will push the release tagged image to the chosen Registry
docker-publish:
  extends: .docker-base
  image:
    name: "$DOCKER_SKOPEO_IMAGE"
    entrypoint: [""]
  stage: publish
  variables:
    GIT_STRATEGY: none
  script:
    - |
      if [[ "${SEMREL_INFO_ON}" && "${DOCKER_SEMREL_RELEASE_DISABLED}" != "true" ]]
      then
        if [[ -z "${SEMREL_INFO_NEXT_VERSION}" ]]
        then
          log_warn "[semantic-release] no new version to release: skip"
          exit 0
        else
          DOCKER_RELEASE_IMAGE="${DOCKER_RELEASE_IMAGE%:*}:$SEMREL_INFO_NEXT_VERSION"
          log_info "[semantic-release] new Image tag is set: $DOCKER_RELEASE_IMAGE"
        fi
      fi

      if [[ "$DOCKER_SNAPSHOT_IMAGE" == "$DOCKER_RELEASE_IMAGE" ]]
      then
        log_warn "\\e[93mYou should consider distinguishing snapshot and release images as they do not differ. Skipping publish phase as image has already been created by previous job.\\e[0m"
        exit 0
      fi
    - BUILDTOOL_HOME=${BUILDTOOL_HOME:-$HOME}
    # 1: push main image
    - skopeo copy --src-authfile "$BUILDTOOL_HOME/skopeo/.docker/src-config.json" --dest-authfile "$BUILDTOOL_HOME/skopeo/.docker/dest-config.json" ${DOCKER_PUBLISH_ARGS} "docker://$DOCKER_SNAPSHOT_IMAGE" "docker://$DOCKER_RELEASE_IMAGE"
    - |
      log_info "Well done your image is pushed and can be pulled with: docker pull $DOCKER_RELEASE_IMAGE"
    # 2: extract info and generate output dotenv
    - docker_digest=$(skopeo inspect --authfile "$BUILDTOOL_HOME/skopeo/.docker/dest-config.json" --format='{{ .Digest }}' "docker://$DOCKER_RELEASE_IMAGE")
    - docker_repository=${DOCKER_RELEASE_IMAGE%:*}
    - docker_tag=${DOCKER_RELEASE_IMAGE##*:}
    - |
      {
        echo "docker_image=$DOCKER_RELEASE_IMAGE"
        echo "docker_image_digest=$docker_repository@$docker_digest"
        echo "docker_repository=$docker_repository"
        echo "docker_tag=$docker_tag"
        echo "docker_digest=$docker_digest"
      } > docker.env
    - publish_extra_tags
  artifacts:
    reports:
      dotenv:
        - docker.env
  rules:
    # on tag: if semrel info not enabled or semrel integration disabled
    - if: '$CI_COMMIT_TAG && ($SEMREL_INFO_ON == null || $SEMREL_INFO_ON == "" || $DOCKER_SEMREL_RELEASE_DISABLED == "true")'
    # exclude non-production branches
    - if: '$CI_COMMIT_REF_NAME !~ $PROD_REF'
      when: never
    # exclude if snapshot is same as release image and semrel info not enabled or semrel integration disabled
    - if: '$DOCKER_SNAPSHOT_IMAGE == $DOCKER_RELEASE_IMAGE && ($SEMREL_INFO_ON == null || $SEMREL_INFO_ON == "" || $DOCKER_SEMREL_RELEASE_DISABLED == "true")'
      when: never
    # support former variable (prevent breaking change)
    - if: '$PUBLISH_ON_PROD == "false"'
      when: never
    - if: '$DOCKER_PROD_PUBLISH_STRATEGY == "manual"'
      when: manual
    - if: '$DOCKER_PROD_PUBLISH_STRATEGY == "auto"'