require variants instead of simply suggesting them #112

	name: concretize-lxplus
	on: [push, pull_request]
	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: cvmfs-contrib/github-action-cvmfs@v2
	with:
	cvmfs_repositories: 'sw.hsf.org,sw-nightlies.hsf.org,sft-nightlies.cern.ch,sft.cern.ch,geant4.cern.ch'
	- name: Start container
	run: \|
	docker run -it --name CI_container -e GITHUB_ENV=${GITHUB_ENV} -v ${GITHUB_WORKSPACE}:/Package -v /cvmfs:/cvmfs:shared -d ghcr.io/aidasoft/centos7:latest /bin/bash
	- name: Setup Spack
	run: \|
	docker exec CI_container /bin/bash -c 'cd ./Package
	git clone --depth 1 https://github.com/key4hep/spack
	git clone --depth 1 https://github.com/key4hep/key4hep-spack
	'
	- name: Concretize
	run: \|
	docker exec CI_container /bin/bash -c 'cd ./Package
	source spack/share/spack/setup-env.sh
	spack env activate environments/key4hep-release-user
	spack repo add key4hep-spack
	source environments/key4hep-release-user/setup_clingo_centos7.sh
	spack add key4hep-stack
	spack concretize -f --reuse \| tee -a key4hep-stack-concretization.log;'
	- uses: actions/upload-artifact@v2
	with:
	name: concretization-log-artifact
	path: key4hep-stack-concretization.log
	retention-days: 5

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