Refactor xz/lzma decompression code #278

	name: Docker

	on:
	# Triggers the workflow on push or pull request events but only for the main branch
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	# Allows you to run this workflow manually from the Actions tab
	workflow_dispatch:

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	build:
	- name: rebuilderd
	file: Dockerfile
	- name: worker-alpine
	file: worker/Dockerfile.alpine
	- name: worker-archlinux
	file: worker/Dockerfile.archlinux
	- name: worker-debian
	file: worker/Dockerfile.debian
	- name: worker-tails
	file: worker/Dockerfile.tails
	steps:
	-
	name: Checkout
	uses: actions/checkout@v2
	-
	name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v1
	-
	name: Cache Docker layers
	uses: actions/cache@v2
	with:
	path: /tmp/.buildx-cache
	key: ${{ runner.os }}-buildx-${{ github.sha }}
	restore-keys: \|
	${{ runner.os }}-buildx-
	-
	name: Build Docker image
	uses: docker/build-push-action@v2
	with:
	load: true
	tags: ${{ matrix.build.name }}
	file: ${{ matrix.build.file }}
	cache-from: type=local,src=/tmp/.buildx-cache
	cache-to: type=local,dest=/tmp/.buildx-cache-new
	-
	name: Test Docker image (rebuilderd)
	run: docker run --rm rebuilderd rebuilderd --help
	if: matrix.build.name == 'rebuilderd'
	-
	name: Test Docker image (rebuildctl)
	run: docker run --rm rebuilderd rebuildctl --help
	if: matrix.build.name == 'rebuilderd'
	-
	# Temp fix
	# https://github.com/docker/build-push-action/issues/252
	# https://github.com/moby/buildkit/issues/1896
	name: Move cache
	run: \|
	rm -rf /tmp/.buildx-cache
	mv /tmp/.buildx-cache-new /tmp/.buildx-cache

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