Add explicit clang-format file with P4C style (#64) #58

	name: build-and-test

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]
	workflow_dispatch:

	# Cancel any preceding run on the pull request.
	concurrency:
	group: p4mlir-${{ github.event.pull_request.number \|\| github.ref }}
	cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}

	jobs:
	build-and-test:
	runs-on: ubuntu-20.04

	steps:

	- name: Checkout repo
	uses: actions/checkout@v4
	with:
	submodules: recursive

	- name: Enable ccache
	uses: hendrikmuhs/[email protected]
	with:
	key: ${{ runner.os }}
	max-size: 2G

	# --------
	# Build and test MLIR. Use cache when available.
	# --------

	- name: Get LLVM hash
	id: get-llvm-hash
	run: echo "hash=$(git rev-parse @:./third_party/llvm-project)" >> $GITHUB_OUTPUT

	- name: Get workflow hash
	id: get-workflow-hash
	run: echo "hash=$(md5sum $GITHUB_WORKSPACE/.github/workflows/build-and-test.yml \| awk '{print $1}')" >> $GITHUB_OUTPUT

	- name: Cache LLVM
	id: cache-llvm
	uses: actions/cache@v3
	with:
	path: \|
	third_party/llvm-project/build/bin/llvm-lit
	install
	key: ${{ runner.os }}-llvm-${{ steps.get-llvm-hash.outputs.hash }}-${{ steps.get-workflow-hash.outputs.hash }}

	- name: Install requirements
	run: \|
	build_tools/ubuntu_install_mlir_requirements.sh

	- name: Build and test MLIR
	if: steps.cache-llvm.outputs.cache-hit != 'true'
	run: \|
	build_tools/build_mlir.sh

	# --------
	# Build and test P4MLIR.
	# --------

	- name: Build and test P4MLIR
	run: \|
	build_tools/build_p4c_with_p4mlir_ext.sh

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