feat: Add e2e.yml test workflow #25

	name: E2E Test

	on:
	pull_request:
	branches: [ main ]
	workflow_dispatch:
	inputs:
	target_repo:
	description: 'Target repository to test against'
	required: false
	default: 'llvm/llvm-project'

	jobs:
	e2e-test:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	clang_version: ['v19.1.7', 'v20.1.8', 'v21.1.2']

	name: Test clang ${{ matrix.clang_version }}
	steps:
	- name: Checkout workflow repo
	uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.13'

	- name: Install Python dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install pre-commit

	- name: Clone target repository
	run: \|
	git clone --depth=1 https://github.com/${{ github.event.inputs.target_repo \|\| 'llvm/llvm-project' }}.git test-repo

	- name: Install pre-commit hooks and run
	run: \|
	cd test-repo
	rm -f .pre-commit-config.yaml \|\| true
	cat > .pre-commit-config.yaml << EOF
	repos:
	- repo: https://github.com/pre-commit/mirrors-clang-format
	rev: ${{ matrix.clang_version }}
	hooks:
	- id: clang-format
	EOF

	pre-commit install
	pre-commit run -v --all-files

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