#!/bin/bash

if [ "x$1" == "x" ]; then
  MONTH=$(( $(date +%-m) - 1 ))
else
	MONTH=$1
    shift
fi

if [ "x$1" == "x" ]; then
    YEAR=$(date +%Y)
	CURR=1
else
    YEAR=$1
    shift
	CURR=0
fi


if [ $MONTH -eq 0 ];
then
	MONTH=12
fi

if [ ${CURR} -eq 1 ] && [ $(( $(date +%-m) - $MONTH )) -le 0 ]; then
  YEAR=$(( $YEAR - 1))
fi

if [ $MONTH -lt 10 ];
then
	MONTH=0$MONTH
fi
tar -cvJf $YEAR-$MONTH.tar.xz $YEAR-$MONTH-*.log --remove-files