variables:
  CONTAINER_TEST_IMAGE: $CI_REGISTRY_IMAGE/test:$CI_PIPELINE_SOURCE-$CI_PIPELINE_ID-$CI_COMMIT_SHA

stages:
  - build
  - test
  - release

.dind: &dind
  image: docker:latest
  services:
    - docker:dind
  before_script:
    - env | grep -E '^CONTAINER_' | sort
    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY

build:
  <<: *dind
  stage: build
  script: |
    docker build --pull -t $CONTAINER_TEST_IMAGE docker
    docker push $CONTAINER_TEST_IMAGE

.release: &release
  <<: *dind
  stage: release
  script: |
    docker pull $CONTAINER_TEST_IMAGE
    docker tag $CONTAINER_TEST_IMAGE $CONTAINER_IMAGE
    docker push $CONTAINER_IMAGE

release branch:
  <<: *release
  variables:
    CONTAINER_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
  except:
    - master
    - tags

release master:
  <<: *release
  variables:
    CONTAINER_IMAGE: $CI_REGISTRY_IMAGE:latest
  only:
    - master

release tag:
  <<: *release
  variables:
    CONTAINER_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG
  only:
    - tags

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