variables:
  DOCKER_BUILDKIT: 1
  IMAGE_DEPENDANCY: $CI_REGISTRY/dependancy:latest
  IMAGE_BUILD: $CI_REGISTRY/builder:latest
  IMAGE_DEPLOY: $CI_REGISTRY/deploy:latest
  IMAGE_FINAL: $CI_REGISTRY/website:latest
  DOCKER_TLS_CERTDIR: "/certs"

stages:
  - build
  - test
  - deploy

# Run docker stuff before each stage to log into built in container registry and confirm version
.base:
  image: docker:latest
  services:
    - docker:dind
  before_script:
    - docker --version
    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" "$CI_REGISTRY"

build:builder:
  extends: .base
  stage: build
  script:
    - docker build --build-arg BUILDKIT_INLINE_CACHE=1 --cache-from "$IMAGE_DEPENDANCY" --target dependancies -t "$IMAGE_TEST"
    - docker push "$IMAGE_DEPENDANCY"

test:linter:
  extends: .base
  stage: test
  needs: ["build:builder"]
  script:
    - docker run lint

deploy: 
  extends: .base
  stage: deploy
  needs: ["test:linter"]
  script:
    - docker build --build-arg BUILDKIT_INLINE_CACHE=1 --cache-from "$IMAGE_DEPENDANCY" --cache-from "$IMAGE_DEPLOY" --cache-from "$IMAGE_BUILD" -t "$IMAGE_DEPLOY" .
    - docker push "$IMAGE_FINAL"