Gitlab CI docker registry cleaner

.gitlab-ci.yml

stages:
  - clean
  - build
  - check

variables:
  ## docker image names inside the YML file to use
  CI_REGISTRY_IMAGE_c: $CI_REGISTRY_IMAGE/dev:${CI_COMMIT_SHORT_SHA}
  CI_REGISTRY_IMAGE_l: $CI_REGISTRY_IMAGE/dev:latest
  CI_REGISTRY_IMAGE_i: services_${CI_BUILD_ID}_api_v2

build:
  tags:
    - dind
  stage: build
  image: tmaier/docker-compose
  script:
    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
    - docker pull ${CI_REGISTRY_IMAGE_l} || true
    - docker build --cache-from ${CI_REGISTRY_IMAGE_l} -f docker/app/Dockerfile -t ${CI_REGISTRY_IMAGE_i} -t ${CI_REGISTRY_IMAGE_c} -t ${CI_REGISTRY_IMAGE_l} .
    - docker push ${CI_REGISTRY_IMAGE_c}
    - docker push ${CI_REGISTRY_IMAGE_l}

# some job that uses the docker
tslint:
  tags:
    - dind
  stage: check
  image: tmaier/docker-compose
  script:
  # pull docker image from registry, about 30sec 
    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY && docker pull ${CI_REGISTRY_IMAGE_c} || true
  # normaly should take 10sec and just use cache  
    - docker build --cache-from ${CI_REGISTRY_IMAGE_c} -f docker/app/Dockerfile . -t services_${CI_BUILD_ID}_api_v2
  # some useful command inside the docker  
    - docker run --rm services_${CI_BUILD_ID}_api_v2 npm --silent run lint
  allow_failure: true
  
## Clear by scheduled tasks
clear_docker_images:
  stage: clean
  only:
    - schedules
  image: everpeace/curl-jq:latest
  variables:
    # Name of image to clean tags
    IMAGE_TO_CLEAN: $CI_PROJECT_PATH/dev
    GIT_STRATEGY: none
  script:
    # just show information
    - |
      echo -e "\x1b[36m  repositories:\x1b[0m"
      curl --cacert $CI_SERVER_TLS_CA_FILE --header "PRIVATE-TOKEN: ${CLEAR_DOCKER_TOKEN}" "${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/registry/repositories" | jq --color-output .
      export IMAGE_TO_CLEAN_ID=$(curl --cacert $CI_SERVER_TLS_CA_FILE --header "PRIVATE-TOKEN: ${CLEAR_DOCKER_TOKEN}" "${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/registry/repositories" | jq ".[] | select(.path == \"$IMAGE_TO_CLEAN\") | .id")
      echo -e "\x1b[36m  $IMAGE_TO_CLEAN (id = $IMAGE_TO_CLEAN_ID) tags:\x1b[0m"
      curl --cacert $CI_SERVER_TLS_CA_FILE --header "PRIVATE-TOKEN: ${CLEAR_DOCKER_TOKEN}" "${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/registry/repositories/$IMAGE_TO_CLEAN_ID/tags" | jq --color-output '[.[] | .location]'
    # remove all tags
    - |
      remove_tag_="curl --cacert $CI_SERVER_TLS_CA_FILE --request DELETE --header 'PRIVATE-TOKEN: ${CLEAR_DOCKER_TOKEN}' ${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/registry/repositories/$IMAGE_TO_CLEAN_ID/tags/"
      curl --cacert $CI_SERVER_TLS_CA_FILE --header "PRIVATE-TOKEN: ${CLEAR_DOCKER_TOKEN}" "${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/registry/repositories/$IMAGE_TO_CLEAN_ID/tags" \
      | jq -r '.[] | select(.name != "latest") | .name' \
      | while read -r TAG; do sh -c "$remove_tag_$TAG"; done
      curl --cacert $CI_SERVER_TLS_CA_FILE --header "PRIVATE-TOKEN: ${CLEAR_DOCKER_TOKEN}" "${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/registry/repositories/$IMAGE_TO_CLEAN_ID/tags" | jq --color-output '[.[] | .location]'