Update GitLab-CI to Buildkit builds

# Copyright (c) 2020 Dom Sekotill <dom.sekotill@kodo.org.uk>

#

# Permission is hereby granted, free of charge, to any person obtaining a copy

# of this software and associated documentation files (the "Software"), to deal

# in the Software without restriction, including without limitation the rights

# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

# copies of the Software, and to permit persons to whom the Software is

# furnished to do so, subject to the following conditions:

#

# The above copyright notice and this permission notice shall be included in all

# copies or substantial portions of the Software.

#

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

# SOFTWARE.

CACHE_IMG=${CI_REGISTRY_IMAGE}/cache

RW_CACHE1=${CACHE_IMG}:latest

RW_CACHE2=${CACHE_IMG}:${CI_COMMIT_REF_NAME}

RW_CACHE3=${CACHE_IMG}:${CI_COMMIT_SHA}

RO_CACHE1=${CACHE_IMG}:${CI_COMMIT_BEFORE_SHA}

cache_arg() {

	arg="--cache-from=${RW_CACHE1},${RW_CACHE2},${RW_CACHE3},${RO_CACHE1}"

	sed -n 's/FROM \([^ ]*:[^ ]*\).*/\1/p' Dockerfile |

		while read image; do arg+=",$image"; done

	echo "$arg"

}

push_cache() (

	for tag in ${RW_CACHE1} ${RW_CACHE2} ${RW_CACHE3}; do

		docker tag ${1? Please specify a source image} ${tag}

		docker push ${tag}

	done

)

image: docker:stable

variables:

  DOCKER_HOST: "tcp://docker:2375/"

  DOCKER_DRIVER: "overlay2"

  DOCKER_BUILDKIT: "1"

  DOCKER_TLS_CERTDIR: ""

  CONTACT_REGISTRY: "yes"

services:

- docker:dind

before_script:

- docker info

- docker login -u gitlab-ci-token -p "$CI_JOB_TOKEN" "$CI_REGISTRY"

- . .gitlab-ci.d/funcs.sh

  REPO: ${CI_REGISTRY_IMAGE}:pipeline-${CI_PIPELINE_IID}

build:

  except: [tags]

  variables:

    REPO: ${CI_REGISTRY_IMAGE}/build:${CI_PIPELINE_ID}

Build:

  stage: build

  image: docker.kodo.org.uk/ci-images/buildkit/buildctl:latest

  tags: [buildkit]

  script:

  - docker build .

    --tag=${REPO}

    --target=scripts

    --build-arg BUILDKIT_INLINE_CACHE=1

    $(cache_arg)

  - docker push ${REPO}

  - push_cache ${REPO}

  - buildctl build

    --frontend=dockerfile.v0

    --local context=.

    --local dockerfile=.

    --opt target=scripts

    --output type=image,name=$REPO,push=true

build:tag:

Push Tags:

  image: docker.kodo.org.uk/ci-images/docker-reg:latest

  only:

    variables:

    - $CI_COMMIT_TAG =~ /^v[0-9]/

  except: []

  extends: [build]

  after_script:

  - docker tag ${REPO} ${CI_REGISTRY_IMAGE}:${CI_COMMIT_TAG#v}

  - docker push ${CI_REGISTRY_IMAGE}:${CI_COMMIT_TAG#v}

  - docker tag ${REPO} ${CI_REGISTRY_IMAGE}:latest

  - docker push ${CI_REGISTRY_IMAGE}:latest

  script:

  - docker-reg $REPO retag ${CI_COMMIT_TAG#v}

  - docker-reg $REPO retag latest