kubespray/.gitlab-ci/build.yml

---
.build:
  stage: build
  image:
    name: moby/buildkit:rootless
    entrypoint: [""]
  variables:
    BUILDKITD_FLAGS: --oci-worker-no-process-sandbox
  before_script:
    - mkdir ~/.docker
    - echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > ~/.docker/config.json

pipeline image:
  extends: .build
  script:
    - |
      buildctl-daemonless.sh build \
        --frontend=dockerfile.v0 \
        --local context=. \
        --local dockerfile=. \
        --opt filename=./pipeline.Dockerfile \
        --output type=image,name=$PIPELINE_IMAGE,push=true \
        --import-cache type=registry,ref=$CI_REGISTRY_IMAGE/pipeline:cache      
  rules:
    - if: '$CI_COMMIT_REF_NAME != $CI_DEFAULT_BRANCH'

pipeline image and build cache:
  extends: .build
  script:
    - |
      buildctl-daemonless.sh build \
        --frontend=dockerfile.v0 \
        --local context=. \
        --local dockerfile=. \
        --opt filename=./pipeline.Dockerfile \
        --output type=image,name=$PIPELINE_IMAGE,push=true \
        --import-cache type=registry,ref=$CI_REGISTRY_IMAGE/pipeline:cache \
        --export-cache type=registry,ref=$CI_REGISTRY_IMAGE/pipeline:cache,mode=max      
  rules:
    - if: '$CI_COMMIT_REF_NAME == $CI_DEFAULT_BRANCH'