#!/bin/sh
# script by Michael Shigorin <mike@osdn.org.ua> for snapshotting
# ALT Linux Sisyphus locally; feel free to use and modify, would
# be glad to hear back about changes

# mirror/site-specific
SRC="ftp.altlinux.org.ua::ALTLinux/Sisyphus/"
BASEDIR="/var/ftp/pub/EMT/Sisyphus/"

# retry params
MAXCOUNT=5
TIMEOUT=60

# shouldn't need to be changed
DATE=`date +%Y%m%d`
LOGDIR="$BASEDIR/log/"
LOGFILE="$LOGDIR/$DATE.log"
DEST="$BASEDIR/.syncing/"

RSYNCARGS="-av --partial --delete"

RPMARGS="-qp --queryformat %{RELEASE}\n"
TAGFILE="$DEST/files/i586/RPMS/altlinux-release-Sisyphus-alt*.noarch.rpm"

unset OK

# init env
mkdir -p "$BASEDIR" "$LOGDIR"
cd "$BASEDIR"

# create hardlinked copy or init dir; order critical
LAST=`ls -d1 20?????? 2>/dev/null | tail -1`
rm -rf "$DEST"
[ -n "$LAST" ] && cp -al "$LAST" "$DEST" || mkdir -p "$DEST"

# try to sync up
for attempt in `seq 1 $MAXCOUNT`; do 
	rsync $RSYNCARGS "$SRC" "$DEST" 2>&1 >> "$LOGFILE" && {
		OK="yes"
		break
	}
	sleep "$TIMEOUT"
done

[ -z "$OK" ] && exit 1

# get timestamp from specific package and move to it
TIMESTAMP=`rpm $RPMARGS $TAGFILE | tail -1 | sed 's/alt//'`

[ ! -d "$TIMESTAMP" ] && {
	mv "$DEST" "$TIMESTAMP"
	touch -d "$DATE" "$TIMESTAMP"
	# fix symlink
	rm -f current
	ln -s "$TIMESTAMP" current
} || rm -rf "$DEST"

# that's all :)
echo "** $TIMESTAMP sync OK" >> "$LOGFILE"