# Mein Default Pipeline File:
#
# Macht einen einfachen Docker Build
# und pusht das Ergebnis in die Container Registry
# wobei bei nicht getaggten Builds das vorherige Image wieder aus der Registry gelöscht wird. 
#

# Wir verwenden mein Spezial-Docker-Image mit dem „reg“ Tool zum Löschen aus Registries. 
image: hub.fami.ga/root/docker:17

# Einfache 2-Stage Pipeline
stages:
  - build
  - push

variables:
  DOCKER_DRIVER: overlay2
  CACHE_IMAGE: /cache

# Login in der Registry, sonst klappt’s nicht
before_script:
  - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY

# Der Docker Build …
Build:
  stage: build
  script:
    # fetches the latest image (not failing if image is not found)
    - docker pull $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG || true 
    - docker pull $CI_REGISTRY_IMAGE:latest              || true
    #
    - echo "##### my Environment" && env && which curl && which reg && ls -la /usr/local/bin/ && echo "#####"
    - >
      docker build
      --pull
      --build-arg VCS_REF=$CI_COMMIT_SHA
      --build-arg VCS_URL=$CI_PROJECT_URL
      --cache-from $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
      --cache-from $CI_REGISTRY_IMAGE:latest
      --tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
      .
    - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
    - echo "##### Build done..."

Clean previous:
  stage: build
  script:
    - echo "before ... ${CI_COMMIT_BEFORE_SHA} ... trying to remove?"
    - docker pull hub.fami.ga/root/docker:empty 
    - docker tag  hub.fami.ga/root/docker:empty $CI_REGISTRY_IMAGE:$CI_COMMIT_BEFORE_SHA
    - docker push                               $CI_REGISTRY_IMAGE:$CI_COMMIT_BEFORE_SHA
    - /usr/local/bin/reg rm -d --auth-url $CI_REGISTRY -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY_IMAGE:$CI_COMMIT_BEFORE_SHA
    - echo "##### Cleanup done..."


Push slug:
  variables:
    GIT_STRATEGY: none
  stage: push
  except: [tags]
  script:
    - echo "##### Push  $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA -> $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG"
    - docker pull $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
    - docker tag  $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA  $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
    - docker push                                    $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG


Push latest:
  variables:
    GIT_STRATEGY: none
  stage: push
  only: [tags]
  script:
    - echo "##### Push  $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA -> $CI_REGISTRY_IMAGE:latest"
    - docker pull $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
    - docker tag  $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA  $CI_REGISTRY_IMAGE:latest
    - docker push                                    $CI_REGISTRY_IMAGE:latest


Push tag:
  variables:
    GIT_STRATEGY: none
  stage: push
  only: [tags]
  script:
    - echo "##### Push  $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA -> $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG"
    - docker pull $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
    - docker tag  $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA  $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG
    - docker push                                    $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG