Add GitHub Actions workflow_call notification support #843

	#
	# Verify on CI/GHA that package building works.
	#
	# TODO: Currently, this supports RPM-based systems only.
	# By adjusting a few details, it can be made work
	# for other distribution types as well.
	#
	name: Test packaging

	on:

	# On which repository actions to trigger the build.
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	# Allow job to be triggered manually.
	workflow_dispatch:

	# Cancel in-progress jobs when pushing to the same branch.
	concurrency:
	cancel-in-progress: true
	group: ${{ github.workflow }}-${{ github.ref }}

	jobs:

	tests:

	runs-on: "ubuntu-latest"
	strategy:

	# Run all jobs to completion (false), or cancel
	# all jobs once the first one fails (true).
	fail-fast: false

	# Define a list of build targets. The labels should match the
	# items within the `services` section of `docker-compose.yml`.
	matrix:
	target: [
	"rpmbuild.el9",
	]

	defaults:
	run:
	shell: bash

	name: Target ${{ matrix.target }}
	steps:

	- name: Acquire sources
	uses: actions/checkout@v4

	- name: Build package
	run: \|
	docker compose run --user root --rm ${{ matrix.target }} build-rpm.sh

	- name: Verify package has been produced
	run: \|
	ls -alF dist/rpm/noarch/*.noarch.rpm

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