build image three times, once to push to docker, twice to push caches… #3

	name: Test Docker Cache

	on: push

	jobs:
	docker:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Prepare
	id: prep
	run: \|
	DOCKER_IMAGE=${{ secrets.DOCKER_USERNAME }}/${GITHUB_REPOSITORY#*/}
	echo "docker_image=${DOCKER_IMAGE}" >> $GITHUB_OUTPUT
	- name: Set up QEMU
	uses: docker/setup-qemu-action@v3
	- name: Login to DockerHub
	if: github.event_name != 'pull_request'
	uses: docker/login-action@v3
	with:
	username: ${{ secrets.DOCKER_USERNAME }}
	password: ${{ secrets.DOCKER_PASSWORD }}
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3
	- name: Build both platforms
	uses: docker/build-push-action@v6
	with:
	context: .
	platforms: linux/amd64,linux/arm64
	build-args: INSTALL_DEV=true
	push: false
	cache-from: \|
	type=registry,ref=${{ steps.prep.outputs.docker_image }}:buildcache-amd64
	type=registry,ref=${{ steps.prep.outputs.docker_image }}:buildcache-arm64
	- name: Cache linux/amd64 to registry
	uses: docker/build-push-action@v6
	with:
	context: .
	platforms: linux/amd64
	build-args: INSTALL_DEV=true
	push: false
	cache-from: type=registry,ref=${{ steps.prep.outputs.docker_image }}:buildcache-amd64
	cache-to: type=registry,ref=${{ steps.prep.outputs.docker_image }}:buildcache-amd64,mode=max
	- name: Cache linux/arm64 to registry
	uses: docker/build-push-action@v6
	with:
	context: .
	platforms: linux/arm64
	build-args: INSTALL_DEV=true
	push: false
	cache-from: type=registry,ref=${{ steps.prep.outputs.docker_image }}:buildcache-arm64
	cache-to: type=registry,ref=${{ steps.prep.outputs.docker_image }}:buildcache-arm64,mode=max

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