Spack configuration #6

	# Workflow to build the development Docker image
	name: Periodic Docker build

	# Controls when the workflow will run
	on:
	# Triggers the workflow on pushes to open pull requests with changes to the Spack or Docker configuration
	pull_request:
	paths:
	- .github/workflows/docker.yml
	- docker/Dockerfile.devenv
	- spack.yaml

	# Triggers the workflow at 00:00 on the first day of every 3 months
	schedule:
	- cron: '0 0 1 /3 '

	# Cancel jobs running if new commits are pushed
	concurrency:
	group: ${{ github.workflow }}-${{ github.event.pull_request.number \|\| github.ref }}
	cancel-in-progress: true

	# Workflow run - one or more jobs that can run sequentially or in parallel
	jobs:
	# This workflow contains a single job called "docker"
	docker:
	# The type of runner that the job will run on
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write

	# Steps represent a sequence of tasks that will be executed as part of the job
	steps:
	# Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
	- name: Checkout the repo
	with:
	persist-credentials: false
	uses: actions/checkout@v4

	- name: Setup Docker buildx
	uses: docker/setup-buildx-action@v3

	- name: Log into GitHub Container Repository
	uses: docker/login-action@v3
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}
	logout: true

	- name: Build container and push to ghcr
	uses: docker/build-push-action@v5
	with:
	push: true
	file: docker/Dockerfile.devenv
	tags: ghcr.io/cambridge-iccs/ftorch-dev-env:latest

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