[sh] rsync runner (just a fancy macro really)

do_rsync.sh

#!/bin/sh

# Usage: name host ['common opts'] ['1st run opts'] ['2nd run opts'] ...

if test "$#" -lt 2; then
	echo "too little arguments!"
	exit 1
fi

RSYNC=rsync
NAME="$1"; shift
HOST="rsync://$1"; shift

if test "$#" -eq 1; then
	# no stage 1, only common
	set -- "$1" ''
elif test "$#" -eq 0; then
	# no common
	set -- '' ''
fi

COMMON_OPTS="$1"; shift

BASEDIR=/var/www/download
CONTENTLOG=$BASEDIR/log/$NAME
MAINLOG=$BASEDIR/mirror.log

_log() {
	level="$1"; shift
	printf >>$MAINLOG "`date +'%Y/%m/%d %T'` $NAME [$level] $1\n"
}

log_info() { _log 'info' "$*"; }
log_error() { _log 'error' "$*"; }

LOCKFILE=$BASEDIR/$NAME.lock

if [ -e $LOCKFILE ]; then
	log_error 'sync in progress? stopping'
	exit 1
fi

touch $LOCKFILE

die() {
	/bin/rm $LOCKFILE
	log_info 'sync done'
}
trap 'die' EXIT

DATADIR=$BASEDIR/data/$NAME/

log_info "sync started"
stage=1
while test "$#" -ne 0; do
	opts="$1"; shift
	args="$COMMON_OPTS $opts -q --log-file=$CONTENTLOG $HOST $DATADIR"
	log_info "$NAME stage $stage"
	eval </dev/null >>$MAINLOG 2>&1 "$RSYNC $args"
	code="$?"
	if [ "$code" = 0 ]; then
		log_info "stage $stage done"
	else
		log_error "stage $stage failed with '$code'; args were '$args'"
		exit 1
	fi
	stage=$(($stage + 1))
done