build: bump clang-format to version 18 #2951

	name: Run code linters

	on:
	- push
	- pull_request

	jobs:
	lint:
	name: Run code linters
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v2
	with:
	path: .
	fetch-depth: 0

	- name: Check JSON files validity
	shell: python
	run: \|
	import json
	from pathlib import Path
	errors = False
	for path in Path('.').rglob('*/.json'):
	try:
	json.loads(path.read_text())
	except json.JSONDecodeError as ex:
	print(f'Malformed JSON in {path}: {ex}')
	errors = True
	if errors:
	exit(1)

	- name: Install dependencies
	run: \|
	wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key\|sudo apt-key add -
	echo 'deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-18 main' \| sudo tee -a /etc/apt/sources.list
	echo 'deb-src http://apt.llvm.org/jammy/ llvm-toolchain-jammy-18 main' \| sudo tee -a /etc/apt/sources.list
	sudo apt update
	sudo apt-get install -y clang-format-18 iwyu
	sudo snap install --edge --classic just
	sudo ln -s /usr/bin/clang-format-18 /usr/local/bin/clang-format
	sudo apt-get install -y python3-pip
	sudo python3 -m pip install pyjson5 pre-commit

	- name: Check formatted code differences
	run: \|
	just lint-format \|\| /bin/true
	git diff --exit-code \|\| (
	clang-format --version
	echo 'Please run `just lint` and commit the changes.'
	exit 1
	)

	- name: Check imports
	run: \|
	git add -A
	just lint-imports
	git diff --exit-code \|\| (
	include-what-you-use --version
	echo 'Please run `just lint` and commit the changes.'
	exit 1
	)

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