#!/bin/bash

codir=$(mktemp -d)
version="$1"

if [[ -z ${version} ]]
then
	echo "no qt version given."
	exit 1
fi

# checkout (needs git >=1.6.5)
git clone --branch "${version}-patched" 'git://gitorious.org/+kde-developers/qt/kde-qt.git' ${codir}/kde-qt

# diff
pushd ${codir}/kde-qt
kdeqtver=$(git --no-pager show --format='%H' ${version}-patched | head -1)
git diff "v${version}..${version}-patched" > ${codir}/qt-${version}-kde-qt-${kdeqtver}.patch
popd

mv ${codir}/qt-${version}-kde-qt-${kdeqtver}.patch .

if [ -d ${codir} ]
then
	rm -rf ${codir}
fi