update spack setup to use the spack official action #26

	name: Build and Push Spack Container

	on:
	workflow_dispatch:
	pull_request:
	branches: [main]
	paths:
	- 'spack-env/spack.yaml'
	- '.github/workflows/spack-container-build.yml'

	jobs:
	build-and-push:
	runs-on: ubuntu-latest

	permissions:
	contents: read
	packages: write

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Setup Spack
	uses: spack/setup-spack@v2
	with:
	ref: release/v0.22
	buildcache: true
	color: true
	path: spack

	- name: Generate Dockerfile with Spack
	shell: spack-bash {0}
	working-directory: spack-env
	run: \|
	spack env activate .
	spack containerize > Dockerfile

	# Update the Dockerfile for human review for debugging if necessary
	- name: Upload generated Dockerfile
	uses: actions/upload-artifact@v4
	with:
	name: spack-dockerfile
	path: spack-env/Dockerfile

	- name: Log in to GitHub Container Registry
	uses: docker/login-action@v3
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3
	with:
	buildkitd-flags: --debug

	- name: Lowercase the github.repository name
	# This step addresses https://github.com/orgs/community/discussions/25768
	run: \|
	echo "REPO_NAME=`echo ${{ github.repository }} \| tr '[:upper:]' '[:lower:]'`" >> $GITHUB_ENV

	# Consider changing the push step to a load and test before pushing to the registry
	- name: Build and push image
	uses: docker/build-push-action@v6
	with:
	context: ./spack-env/
	push: true
	tags: ghcr.io/${{ env.REPO_NAME }}/spack-env:latest
	cache-from: type=gha
	cache-to: type=gha,mode=max

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