77 lines
2.4 KiB
Bash
Executable file
77 lines
2.4 KiB
Bash
Executable file
#!/usr/bin/env bash
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# This is a simple mirroring script. To save bandwidth it first checks a
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# timestamp via HTTP and only runs rsync when the timestamp differs from the
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# local copy. As of 2016, a single rsync run without changes transfers roughly
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# 6MiB of data which adds up to roughly 250GiB of traffic per month when rsync
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# is run every minute. Performing a simple check via HTTP first can thus save a
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# lot of traffic.
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# Directory where the repo is stored locally. Example: /srv/repo
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target="/data/arch"
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# Directory where files are downloaded to before being moved in place.
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# This should be on the same filesystem as $target, but not a subdirectory of $target.
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# Example: /srv/tmp
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tmp="/data/tmp"
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# Lockfile path
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lock="/tmp/syncrepo.lck"
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# If you want to limit the bandwidth used by rsync set this.
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# Use 0 to disable the limit.
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# The default unit is KiB (see man rsync /--bwlimit for more)
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bwlimit=0
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# The source URL of the mirror you want to sync from.
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# If you are a tier 1 mirror use rsync.archlinux.org, for example like this:
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# rsync://rsync.archlinux.org/ftp_tier1
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# Otherwise chose a tier 1 mirror from this list and use its rsync URL:
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# https://www.archlinux.org/mirrors/
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source_url='rsync://mirror.23media.de/archlinux/'
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# An HTTP(S) URL pointing to the 'lastupdate' file on your chosen mirror.
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# If you are a tier 1 mirror use: http://rsync.archlinux.org/lastupdate
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# Otherwise use the HTTP(S) URL from your chosen mirror.
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lastupdate_url='http://mirror.23media.de/archlinux/lastupdate'
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#### END CONFIG
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[ ! -d "${target}" ] && mkdir -p "${target}"
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[ ! -d "${tmp}" ] && mkdir -p "${tmp}"
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exec 9>"${lock}"
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flock -n 9 || exit
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rsync_cmd() {
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local -a cmd=(rsync -rtlH --safe-links --delete-after ${VERBOSE} "--timeout=600" "--contimeout=60" -p \
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--delay-updates --no-motd "--temp-dir=${tmp}")
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if stty &>/dev/null; then
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cmd+=(-h -v --progress)
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else
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cmd+=(--quiet)
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fi
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if ((bwlimit>0)); then
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cmd+=("--bwlimit=$bwlimit")
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fi
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"${cmd[@]}" "$@"
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}
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# if we are called without a tty (cronjob) only run when there are changes
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if ! tty -s && [[ -f "$target/lastupdate" ]] && diff -b <(curl -Ls "$lastupdate_url") "$target/lastupdate" >/dev/null; then
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# keep lastsync file in sync for statistics generated by the Arch Linux website
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rsync_cmd "$source_url/lastsync" "$target/lastsync"
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exit 0
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fi
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rsync_cmd \
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--exclude='*.links.tar.gz*' \
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--exclude='/other' \
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--exclude='/sources' \
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"${source_url}" \
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"${target}"
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