GitHub Cache Warmer #341

	# Workflow keeps the docker github cache active by building every week / on demand
	# Github drops cache over 7 days old
	# https://docs.github.com/en/actions/guides/caching-dependencies-to-speed-up-workflows
	name: GitHub Cache Warmer

	on:
	schedule:
	# Run 05:00 UTC every TUE, FRI
	- cron: "0 5 * * 2,5"
	# On-demand push-button build, why not...
	workflow_dispatch:

	jobs:
	get_latest_version:
	uses: ./.github/workflows/get_nexus_version_latest.yml

	build_image_to_cache:
	runs-on: ubuntu-latest
	needs: get_latest_version
	steps:
	- name: Checkout
	uses: actions/checkout@v4

	# Setup docker cache to keep warm
	- name: Setup Docker build cache
	uses: actions/cache@v3
	with:
	path: /tmp/buildx-cache
	key: ${{runner.os}}-buildx-${{github.sha}}
	restore-keys: \|
	${{runner.os}}-buildx-

	# Enable multi-architecture support on build node
	- name: Set up QEMU
	uses: docker/setup-qemu-action@v3
	with:
	platforms: all

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3
	with:
	version: latest

	- name: Build to GitHub cache (keep it warm)
	env:
	NEXUS_VERSION: ${{needs.get_latest_version.outputs.nexus_version}}
	run: \|
	docker buildx build \
	--build-arg "NEXUS_VERSION=${NEXUS_VERSION}" \
	--cache-from type=local,src=/tmp/buildx-cache \
	--cache-to type=local,dest=/tmp/buildx-cache \
	--label org.opencontainers.image.revision="${{github.sha}}" \
	--label org.opencontainers.image.version="${NEXUS_VERSION}" \
	--platform "linux/arm/v7,linux/arm64" \
	--pull \
	--output "type=image,push=false" \
	--file ./Dockerfile .

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