drone: improved rsync script

maintenance/drone/rsync.sh

@@ -6,17 +6,18 @@ set -e
 [ ! -z "$DRONE" ] || exit 1
 
 
-keypath=/tmp/rsync-key-$$
+keypath="/tmp/rsync-key-$$"
 
 umask 0077
-echo "$RSYNC_KEY" > $keypath
+echo "$RSYNC_KEY" > "$keypath"
 umask 0022
 
-temppath=/tmp/rsync-temp-$$
+temppath="/tmp/rsync-temp-$$"
 
-mkdir -p $temppath/$2
+target="${@: -1}"
+mkdir -p "$temppath/$target"
 
-rsync -av $1 $temppath/$2
-rsync -rv -e "ssh -o StrictHostKeyChecking=no -i $keypath" $temppath/ ${RSYNC_USER}@${RSYNC_HOST}:
+rsync -av "${@:1:$#-1}" "$temppath/$target"
+rsync -rv -e "ssh -o StrictHostKeyChecking=no -i $keypath" "$temppath/" "${RSYNC_USER}@${RSYNC_HOST}:"
 
-rm $keypath
+rm "$keypath"