Add ccache support #2148

	name: Build-Documentation

	on: [push, pull_request]

	# Make sure we don't have more than one active workflow to prevent race conditions
	# e.g a previous build may update docs later and overwrite if we don't have this.
	# It is ok to have parallel runs for push and PR events and from different branches.
	# We can cancel previous runs for non-trunk events.
	concurrency:
	group: build-documentation-${{ github.ref }}-${{ github.event_name }}

	jobs:
	Build-Documentation:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 1 # Using a shallow checkout. Change to `0` if a full fetch is required.

	- name: Set variables
	id: vars
	run: \|
	echo "default_ref=${{ format('refs/heads/{0}', github.event.repository.default_branch) }}" >> $GITHUB_OUTPUT

	- name: Run Doxygen
	uses: mattnotmitt/[email protected]
	with:
	doxyfile-path: 'doxygen-public.conf'

	- name: Deploy
	uses: peaceiris/actions-gh-pages@v3
	if: ${{ github.ref == steps.vars.outputs.default_ref }}
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_dir: ./website
	enable_jekyll: true

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