path-walk API: avoid adding a root tree more than once #9

	name: check-style

	# Get the repository with all commits to ensure that we can analyze
	# all of the commits contributed via the Pull Request.

	on:
	pull_request:
	types: [opened, synchronize]

	# Avoid unnecessary builds. Unlike the main CI jobs, these are not
	# ci-configurable (but could be).
	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	check-style:
	env:
	CC: clang
	jobname: ClangFormat
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- run: ci/install-dependencies.sh

	- name: git clang-format
	continue-on-error: true
	id: check_out
	run: \|
	./ci/run-style-check.sh \
	"${{github.event.pull_request.base.sha}}"

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