Docker Image Build with cache #116

	name: Docker Image Build with cache

	on:
	push:
	branches:
	- main
	pull_request:
	branches: [ main ]

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	cache_build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2

	- name: Prepare
	id: prep
	run: \|
	TAG=$(echo "${GITHUB_SHA}" \| head -c7)
	IMAGE="cndp"
	echo ::set-output "name=tagged_image::${IMAGE}:${TAG}"
	echo ::set-output "name=tag::${TAG}"

	- name: Set up Docker Buildx
	id: buildx
	uses: docker/setup-buildx-action@master

	# Registry login step intentionally missing

	- name: Cache Docker layers
	uses: actions/cache@v2
	with:
	path: /tmp/.buildx-cache
	key: ${{ runner.os }}-single-buildx-${{ github.sha }}
	restore-keys: \|
	${{ runner.os }}-single-buildx

	- name: Build production image
	uses: docker/build-push-action@v2
	with:
	context: .
	builder: ${{ steps.buildx.outputs.name }}
	file: ./containerization/docker/ubuntu/Dockerfile
	push: false # This would be set to true in a real world deployment scenario.
	tags: ${{ steps.prep.outputs.tagged_image }}
	cache-from: type=local,src=/tmp/.buildx-cache
	cache-to: type=local,dest=/tmp/.buildx-cache-new

	# 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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