#!/bin/bash
#
# This creates an "rpmbuild" environment in which to
# build the CentOS kernel 
#
set -x


#
# This is most likely temporary, we need to get the build
# number information into git like the other branches

KNLSUFFIX=$(date "+%y%m%d%H%M%S" )

# We need DST_DIR to be set so that we know where to build
if [ "$DST_DIR" == "" ]
then
    echo "DST_DIR is not set"
    exit 1
fi

# Save our current directory
SRCDIR=$(pwd)

# Create the target dirs under DST_DIR
mkdir -p $DST_DIR/rpmbuild
mkdir -p $DST_DIR/RPMS
mkdir -p $DST_DIR/SRPMS

# Create an "rpmbuild" environment with symlinks
pushd $DST_DIR/rpmbuild
ln -s ../RPMS .
ln -s ../SRPMS .
cp -rpd $SRCDIR/thirdparty/SOURCES .
cp $SRCDIR/patches/* $DST_DIR/rpmbuild/SOURCES

mkdir SPECS

# Use rpmbuid to build the new kernel
cd SPECS

cp $SRCDIR/thirdparty/SPECS/kernel.spec .
cat $SRCDIR/patches/kernel.spec.patch | sed s/KNLSUFFIX/$KNLSUFFIX/ | patch -p0

export HOME=$DST_DIR

rpmbuild -ba kernel.spec

popd