Sync hostfiles #310

	name: Sync hostfiles

	on:
	schedule:
	- cron: '17 * * * *'
	workflow_dispatch:

	concurrency:
	group: sync-hostfiles
	cancel-in-progress: false

	permissions:
	contents: write

	env:
	FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: 'true'

	jobs:
	sync:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Fetch hostfiles
	env:
	UA: ${{ secrets.REFCHECK_USER_AGENT }}
	run: \|
	if [ -z "$UA" ]; then
	echo "REFCHECK_USER_AGENT secret is not set." >&2
	exit 1
	fi
	for f in M17Hosts.txt M17Hosts.json; do
	curl --fail --show-error --silent \
	--retry 5 --retry-delay 10 --retry-all-errors \
	--max-time 60 \
	-A "$UA" \
	-o "$f.new" \
	"https://hostfiles.refcheck.radio/$f"
	done

	- name: Replace if changed
	id: diff
	run: \|
	for f in M17Hosts.txt M17Hosts.json; do
	if [ ! -s "$f.new" ]; then
	echo "$f: fetched file is empty; aborting." >&2
	exit 1
	fi
	if [ ! -f "$f" ] \|\| ! cmp -s "$f" "$f.new"; then
	mv "$f.new" "$f"
	else
	rm "$f.new"
	fi
	done
	if [ -n "$(git status --porcelain -- M17Hosts.txt M17Hosts.json)" ]; then
	echo "changed=true" >> "$GITHUB_OUTPUT"
	else
	echo "changed=false" >> "$GITHUB_OUTPUT"
	fi

	- name: Commit and push
	if: steps.diff.outputs.changed == 'true'
	run: \|
	git config user.name "github-actions[bot]"
	git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
	git add M17Hosts.txt M17Hosts.json
	files=$(git diff --cached --name-only \| paste -sd, -)
	git commit -m "sync: ${files} $(date -u +%Y-%m-%dT%H:%MZ)"
	git push

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