image: docker:19.03.13

variables:
  # docker host
  DOCKER_HOST: tcp://docker:2376
  # container, thanks to volume mount from config.toml
  DOCKER_TLS_CERTDIR: "/certs"
  # These are usually specified by the entrypoint, however the
  # Kubernetes executor doesn't run entrypoints
  # https://gitlab.com/gitlab-org/gitlab-runner/-/issues/4125
  DOCKER_TLS_VERIFY: 1
  DOCKER_CERT_PATH: "$DOCKER_TLS_CERTDIR/client"

services:
  - docker:19.03.13-dind

before_script:
  - docker info

build_merge_request:
  stage: build
  rules:
    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
      when: always
  script:
    - docker build -t $CI_PROJECT_PATH_SLUG:$CI_COMMIT_SHORT_SHA -f docker/Dockerfile .

build_image:
  stage: build
  variables:
    IMAGE_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA
    LATEST_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-latest
  script:
    # - docker build -t $IMAGE_TAG .
    - echo "$CI_REGISTRY_PASSWORD" | docker login -u "$CI_REGISTRY_USER" $CI_REGISTRY --password-stdin
    - docker build -t $IMAGE_TAG -f docker/Dockerfile .
    - docker push $IMAGE_TAG
    - docker tag $IMAGE_TAG $LATEST_TAG
    - docker push $LATEST_TAG
  only:
    - master