Merge remote-tracking branch 'gitlab/master' #73

	name: Format-check

	on: [ push, pull_request ]

	env:
	TZ: Atlantic/Reykjavik

	defaults:
	run:
	shell: bash -ex {0}

	jobs:
	build:
	name: ${{ matrix.name }}
	runs-on: ubuntu-18.04
	timeout-minutes: 120
	strategy:
	fail-fast: true
	matrix:
	include:
	- name: "Clang12 Release C++20"
	pkg: "clang-12"
	format: "clang-format-12"
	cxx: "clang++-12"
	cc: "clang-12"
	cxx_flags: "-std=c++20"
	build_type: Release
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	with:
	path: src
	fetch-depth: 2
	submodules: recursive

	- name: Add package source
	run: \|
	echo 'APT::Acquire::Retries "5";' \| sudo tee -a /etc/apt/apt.conf.d/80-retries > /dev/null
	sudo add-apt-repository --no-update --yes ppa:ubuntu-toolchain-r/ppa
	sudo add-apt-repository --no-update --yes ppa:ubuntu-toolchain-r/test
	wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key \| sudo apt-key add -
	sudo add-apt-repository --no-update --yes "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-12 main"
	sudo apt-get update

	- name: Install CMake
	run: sudo apt-get install --yes cmake

	- name: Install clang-format
	run: sudo apt-get install --yes ${{ matrix.pkg }} ${{ matrix.format }}

	- name: Tool versions
	run: \|
	env cmake --version
	env ${{ matrix.cxx }} --version
	env ${{ matrix.format }} --version
	- name: Configure tests
	env:
	CXX: ${{ matrix.cxx }}
	CC: ${{ matrix.cc }}
	run: \|
	mkdir build
	cd build
	cmake ../src -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} -DCMAKE_CXX_FLAGS="${{ matrix.cxx_flags }}"
	- name: Run tests
	run: \|
	cd build
	make check_format

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