Update Policy File #105

	name: Update Policy File

	on:
	schedule:
	- cron: '0 0 * * *' # Runs every day at midnight UTC
	workflow_dispatch: # Allows manual triggering of the workflow

	jobs:
	update-mta-sts-policy:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	with:
	token: ${{ secrets.ACCESS_TOKEN }}

	- name: Fetch current Proton MTA-STS policy
	run: \|
	curl -s https://mta-sts.protonmail.com/.well-known/mta-sts.txt > .well-known/mta-sts.txt

	- name: Replace `max_age`
	run: \|
	# Replace max_age with 86400
	sed -i 's/^max_age: .*/max_age: 86400/' .well-known/mta-sts.txt
	# Replace mode with testing
	#sed -i 's/^mode: .*/mode: testing/' .well-known/mta-sts.txt

	- name: Check for changes
	id: check_changes
	run: \|
	git config --global user.name "github-actions[bot]"
	git config --global user.email "[email protected]."
	git add .well-known/mta-sts.txt
	if git diff --cached --quiet; then
	echo "changes=false" >> $GITHUB_ENV
	echo "No changes detected."
	else
	echo "changes=true" >> $GITHUB_ENV
	echo "Changes detected."
	fi

	- name: Commit and push updated file
	if: env.changes == 'true'
	run: \|
	git commit -m "Update MTA-STS policy on $(date +'%Y-%m-%d')"
	git push

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