image: docker:cli

services:
  - docker:dind

stages:
  - build
  - deploy

variables:
  DOCKER_IMAGE_NAME: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
  PLATFORM: linux/amd64,linux/arm64

before_script:
  - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
  - docker buildx create --name mybuilder --platform "$PLATFORM"
  - docker buildx use mybuilder

build:
  stage: build
  script:
      - docker buildx build --push -t "$CI_REGISTRY_IMAGE:latest" --platform "$PLATFORM" .
  # Run this job in a branch where a Dockerfile exists
  rules:
    - if: $CI_COMMIT_BRANCH
      exists:
        - Dockerfile

deploy:
  stage: deploy
  script:
    - docker pull $CI_REGISTRY_IMAGE:latest
    - docker tag $CI_REGISTRY_IMAGE:latest $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG
    - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG
  only:
    - tags
  when: on_success