.github: workflows: build dkms packages #2

	name: Build kernel development containers

	on:
	push:
	branches:
	- 'intel/**'
	paths:
	- '.github/workflows/container.yml'
	- 'container/**'

	pull_request:
	branches:
	- 'intel/**'
	paths:
	- '.github/workflows/container.yml'
	- 'container/**'

	workflow_dispatch:

	jobs:
	build:
	runs-on: ubuntu-latest

	strategy:
	matrix:
	image:
	- rockylinux-8-kernel-devel
	- ubuntu-22.04-kernel-devel

	env:
	image: ghcr.io/ofs/linux-dfl-backport/${{ matrix.image }}

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

	# https://docs.docker.com/engine/reference/commandline/tag/#extended-description
	# > A tag name must be valid ASCII and may contain lowercase and
	# > uppercase letters, digits, underscores, periods and dashes.
	# > A tag name may not start with a period or a dash and may
	# > contain a maximum of 128 characters.
	- name: Set image tag from git reference
	run: \|
	ref=$(echo "$GITHUB_REF" \| sed 's#^refs/$\\|heads/\\|tags/$##')
	echo "tag=${ref//[^a-zA-Z0-9_.]/-}" >> "$GITHUB_ENV"

	- name: Build kernel development image
	run: docker build -t "$image:$tag" -f container/${{ matrix.image }}/Dockerfile .

	- name: Log in to registry
	if: github.event_name == 'push'
	run: echo "$token" \| docker login ghcr.io -u "$GITHUB_REPOSITORY_OWNER" --password-stdin
	env:
	token: ${{ secrets.GITHUB_TOKEN }}

	- name: Push image to registry
	if: github.event_name == 'push'
	run: docker image push "$image:$tag"

Provide feedback