base_register_stage.yml

.base_register_stage:
  stage: "Registration"
  extends: .base_docker_image_stage
  script:
    - echo "$CI_JOB_TOKEN" | docker login $CI_REGISTRY -u gitlab-ci-token --password-stdin
    - >-
      if [[ -n "${CI_COMMIT_TAG}" ]]; then
        export TAG=$(printf "${CI_COMMIT_TAG}" | sed "s/^v//")
        echo "Register ${CI_COMMIT_TAG} tag as ${TAG}"
      else
        export TAG=$CI_COMMIT_REF_SLUG
        echo "Register ${TAG} branch"
      fi

    - echo "
      docker build
      --cache-from ${IMAGE_NAME}:${CACHE_TAG}
      -t ${IMAGE_NAME}:${CI_COMMIT_SHA}
      -t ${IMAGE_NAME}:${TAG}
      $DOCKER_BUILD_ARGS
      $CONTEXT"
    - docker build
      --cache-from ${IMAGE_NAME}:${CACHE_TAG}
      -t ${IMAGE_NAME}:${CI_COMMIT_SHA}
      -t ${IMAGE_NAME}:${TAG}
      $DOCKER_BUILD_ARGS
      $CONTEXT
    - docker push ${IMAGE_NAME}:${CI_COMMIT_SHA}
    - docker push ${IMAGE_NAME}:${TAG}