Initial base image pipeline for GHCR, just virtual for now #1

	name: "Build and Publish CI Containers to GHCR"

	on:
	push:
	tags:
	- "ccf_test_ci_image/*"

	env:
	REGISTRY: ghcr.io

	jobs:
	build:
	name: "Build and Publish CI Containers"
	runs-on: ubuntu-latest

	permissions:
	contents: read
	packages: write
	attestations: write
	id-token: write

	steps:
	- uses: actions/checkout@v4

	- name: Truncate ref
	run: echo "tag=${GITHUB_REF#refs/tags/ccf_ci_image/}" >> $GITHUB_OUTPUT
	id: tref

	- name: Log in to the Container registry
	uses: docker/login-action@v3
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Extract metadata (tags, labels) for Docker
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ${{ env.REGISTRY }}/ccf/ci

	- name: Build and push Virtual container
	id: push
	uses: docker/build-push-action@v5
	with:
	context: .
	file: ./docker/ccf_ci
	build-args: \|
	platform=virtual
	clang_version=15
	push: true
	tags: ${{steps.tref.outputs.tag}}-virtual-clang15
	labels: ${{ steps.meta.outputs.labels }}

	- name: Generate artifact attestation
	uses: actions/attest-build-provenance@v1
	with:
	subject-name: ${{ env.REGISTRY }}/ccf/ci
	subject-digest: ${{ steps.push.outputs.digest }}
	push-to-registry: true

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