Clean up preview site #120

	name: Clean up preview site

	on:
	workflow_dispatch:
	schedule:
	- cron: '00 8 * * 1'

	jobs:
	delete:
	name: Clean up preview site
	runs-on: ubuntu-latest
	env:
	CI: true
	PREVIEW_DIR: preview
	DAYS_OLD: 7
	steps:
	- name: Checkout Repo
	uses: actions/checkout@v4
	with:
	ref: gh-pages
	# This makes Actions fetch all Git history so that the cleanup script can access metadata
	# from past commits.
	# Filter by `blob:none` to avoid downloading unnecessary file contents.
	fetch-depth: 0
	filter: blob:none

	- name: Delete old preview directories
	run: \|
	DATE_FROM_DAYS_AGO=`date --date="${{env.DAYS_OLD}} days ago" +"%Y"-"%m"-"%d"`;
	for i in $(find ${{ env.PREVIEW_DIR }} -mindepth 1 -maxdepth 1 -type d -print); do
	if [[ $(git log --before=$DATE_FROM_DAYS_AGO $i \| tail -1) ]]; then
	echo "Deleting directory $i"
	rm -rf $i
	fi
	done
	if [[ $(git status --porcelain --untracked-files=no \| wc -l) -eq 0 ]]; then
	echo "No directories to clean up"
	exit 0
	fi
	git config --local user.name 'GitHub Actions'
	git config --local user.email '[email protected]'
	git add ${{ env.PREVIEW_DIR }}
	git commit --quiet -m "Clean up old preview directories"
	git pull --rebase
	git push
	shell: bash
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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