Allow building with C++20 (#330) #204

	name: clang-format

	on: [push, pull_request]

	jobs:
	format:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	with:
	fetch-depth: 0
	- uses: cvmfs-contrib/github-action-cvmfs@v3
	- name: Start container
	run: \|
	docker run -it --name CI_container -v ${GITHUB_WORKSPACE}:/Package -v /cvmfs:/cvmfs:shared -d ghcr.io/aidasoft/centos7:latest /bin/bash
	- name: Add upstream
	run: \|
	docker exec CI_container /bin/bash -c 'cd ./Package
	git remote add upstream https://github.com/HEP-FCC/FCCAnalyses.git
	git fetch upstream'
	- name: Run formatter
	run: \|
	docker exec CI_container /bin/bash -c 'cd ./Package
	source /cvmfs/sft.cern.ch/lcg/contrib/clang/14.0.6/x86_64-centos7/setup.sh
	git clang-format --style=file $(git merge-base upstream/master HEAD)'
	- name: Check cleanliness
	run: \|
	docker exec CI_container /bin/bash -c 'cd ./Package
	git diff'

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