Script to check if the lastupdate file on the chaotic AUR main mirror server has changed, and if yes to synchronise from it.

chaotic-sync.sh

#!/usr/bin/env bash

set -e

target="/srv/repo/chaotic"
tmp="/tmp/chaotic-tmp"
lock="/tmp/.chaotic-sync-lock"
bwlimit=0
source_url='rsync://builds.garudalinux.org/chaotic/'
lastupdate_url='https://builds.garudalinux.org/repos/chaotic-aur/lastupdate'

[ ! -d "${target}" ] && mkdir -p "${target}"
[ ! -d "${tmp}" ] && mkdir -p "${tmp}"

exec 9>"${lock}"
flock -n 9 || exit

rsync_cmd() {
	local -a cmd=(rsync -rlptH --delete-delay --delay-updates --safe-links --max-delete=1000 \
	"--timeout=600" "--contimeout=60" --no-motd "--temp-dir=${tmp}")

	if stty &>/dev/null; then
		cmd+=(-h -v --progress)
	else
		cmd+=(--quiet)
	fi

	if ((bwlimit>0)); then
		cmd+=("--bwlimit=$bwlimit")
	fi

	"${cmd[@]}" "$@"
}

# Only run when there are changes

if [[ -f "$target/chaotic-aur/lastupdate" ]] && diff -b <(curl -Ls "$lastupdate_url") "$target/chaotic-aur/lastupdate" >/dev/null; then
	exit 0
fi

rsync_exclude=("--exclude=/info")
rsync_exclude+=("--exclude=/lastsync")
rsync_cmd \
	"${rsync_exclude[@]}" \
	"${source_url}" \
	"${target}"

date -u "+%s" > "$target/chaotic-aur/lastsync"

echo "Last sync was $(date -d @"$(cat ${target}/chaotic-aur/lastsync)" --rfc-3339=seconds -u)" > "${target}/info"
echo "Last update was $(date -d @"$(cat ${target}/chaotic-aur/lastupdate)" --rfc-3339=seconds -u)" >> "${target}/info"