geant4: add versions with backported eAST physics list #887

	name: Build Packages

	on: [push, pull_request]

	jobs:
	generate-matrix:
	name: Generate matrix for build
	runs-on: ubuntu-latest
	outputs:
	matrix: ${{ steps.set-matrix.outputs.matrix }}
	empty: ${{ steps.set-matrix.outputs.empty }}
	steps:
	- uses: actions/checkout@v2
	- id: set-matrix
	run: \|
	CHANGED_PACKAGES=$(git diff-tree --no-commit-id --name-only -r ${{ github.sha }} \| sed 's\|^packages/\|\|' \| xargs -I {} dirname {} \| uniq)
	EMPTY=true
	JSON="{\"include\":["
	for pkg in farmhash ${CHANGED_PACKAGES} ; do
	if [ ! -d packages/$pkg ] ; then continue ; fi
	if [ ! -f packages/$pkg/package.py ] ; then continue ; fi
	# Add build to the matrix only if it is not already included
	JSONline="{\"pkg\": \"$pkg\"},"
	if [[ "$JSON" != "$JSONline" ]]; then
	JSON="$JSON$JSONline"
	EMPTY=false
	fi
	done

	# Remove last "," and add closing brackets
	if [[ $JSON == *, ]]; then
	JSON="${JSON%?}"
	fi
	JSON="$JSON]}"
	echo $JSON

	# Set output
	echo "::set-output name=matrix::$( echo "$JSON" )"
	echo "::set-output name=empty::$EMPTY"

	build:
	name: Build ${{ matrix.pkg }}
	needs: generate-matrix
	if: ${{ needs.generate-matrix.outputs.empty == 'false' }}
	strategy:
	fail-fast: false
	matrix: ${{fromJson(needs.generate-matrix.outputs.matrix)}}
	runs-on: ubuntu-latest
	container: ghcr.io/spack/ubuntu-jammy:latest
	steps:
	- uses: actions/checkout@v2
	- name: Setup eic-spack repository
	run: \|
	. /opt/spack/share/spack/setup-env.sh
	spack repo add $PWD
	spack repo list
	- name: Build package ${{ matrix.pkg }}
	run: \|
	. /opt/spack/share/spack/setup-env.sh
	spack install ${{ matrix.pkg }}

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