# Docker Hub version e.g. here https://github.com/oofnikj/nuttssh/blob/master/.gitlab-ci.yml
image: oofnik/docker:buildx

variables:
  PLATFORM: linux/amd64,linux/arm64,linux/arm/v7
  CI_IMAGE: $CI_REGISTRY_IMAGE

services:
  - docker:dind

before_script:
  - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
  - docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  - docker buildx create --use

build-master:
  stage: build
  retry: 2
  script:
    - docker buildx build --push -t "$CI_IMAGE"
      --platform "$PLATFORM" --cache-from "$CI_IMAGE"
      --build-arg BUILDKIT_INLINE_CACHE=1 .
  only:
    - master

build-feature:
  stage: build
  retry: 2
  script:
    - docker buildx build --push -t "$CI_IMAGE:$CI_COMMIT_REF_SLUG"
      --platform "$PLATFORM" --cache-from "$CI_IMAGE:$CI_COMMIT_REF_SLUG"
      --build-arg BUILDKIT_INLINE_CACHE=1 .
  except:
    - master