#!/bin/bash

if [ ! $1 ]
then
    echo "Usage: unsign.sh <jarfile>"
    exit
fi

curdir=`pwd`
d="tmp-$1"
mkdir -p $d
cd $d
unzip -q ../$1

cd META-INF
rm -f *.DSA *.SF

egrep -v "^Name: .*$" MANIFEST.MF | egrep -v "^SHA1-Digest:.*$" |  egrep -v "^\s*$" > NEW_MANIFEST.MF
mv NEW_MANIFEST.MF MANIFEST.MF

cd ..
zip -qr $1 .

cd ..
mv $d/$1 $1
rm -rf $d

cd $curdir

echo "$1 has been un-signed"