add apptainer example #9

	name: apptainer

	on:
	push:
	branches:
	- patch1

	env:
	VERSION: '1.4.1.9015' # versioned by bump2version
	jobs:
	docker2apptainer:
	name: Docker2apptainer
	runs-on: ubuntu-latest
	defaults:
	run:
	shell: bash -l {0}
	steps:
	- name: Free Disk Space
	uses: jlumbroso/free-disk-space@main
	- name: Check free space
	run: \|
	echo "Free space:"
	df -h
	- name: Code checkout
	uses: actions/checkout@v4
	with:
	ref: v${{ env.VERSION }}
	- name: 🏰 QEMU setup
	uses: docker/setup-qemu-action@v3
	- name: 🏯 Buildx setup
	uses: docker/setup-buildx-action@v3
	- name: DockerHub login
	uses: docker/login-action@v3
	with:
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}
	- name: 🐳 Docker img build and push to DockerHub
	uses: docker/build-push-action@v6
	with:
	context: . # yes, dot
	push: false
	platforms: linux/amd64
	tags: \|
	sigven/pcgr:${{ env.VERSION }}
	outputs: type=docker,dest=pcgr_${{ env.VERSION }}.tar

	- name: Apptainer setup
	uses: eWaterCycle/setup-apptainer@v2

	- name: Apptainer build
	run: \|
	docker image ls -a
	#docker save sigven/pcgr:${VERSION} -o pcgr_${VERSION}.tar
	ls -la
	df -h
	echo "Building Apptainer SIF"
	echo "---------------------------------"
	apptainer build pcgr_singularity_${VERSION}.sif docker-archive://pcgr_${VERSION}.tar
	echo "---------------------------------"
	ls -la
	df -h
	#- name: Upload SIF to GHCR
	# run: \|
	# echo ${{ secrets.GITHUB_TOKEN }} \| apptainer registry login -u ${{ github.actor }} --password-stdin oras://ghcr.io
	# apptainer push pcgr_${VERSION}.sif oras://ghcr.io/${GITHUB_REPOSITORY}:${VERSION}

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