#!/bin/bash

CWD=$(pwd)

TMP=${TMP:-/tmp/sources}
OUT=${OUT:-/tmp/packages}

KVERSION=${KVERSION:-2.6.34.7}
SUFFIX=libre1
ARCH=${ARCH:-x86}
BUILD=${BUILD:-1}

PKG=${TMP}/package-kernel-headers

rm -rf $PKG
mkdir -p $PKG $OUT

set -e

echo "Building kernel-headers-$KVERSION..."

if [[ ! -d /usr/src/linux-${KVERSION} ]]; then
  if [[ -f ${CWD}/linux-${KVERSION}-$SUFFIX.tar.lz ]]; then
    mkdir -p /usr/src
    lzip -cd ${CWD}/linux-${KVERSION}-$SUFFIX.tar.lz | tar -xvf - -C /usr/src/
  else
    echo "${CWD}/linux-${KVERSION}-$SUFFIX.tar.lz: No such file."
    exit 1;
  fi
fi

mkdir -p ${PKG}/usr
( cd /usr/src/linux-${KVERSION}
  make mrproper
  make headers_check
  make INSTALL_HDR_PATH=${PKG}/usr headers_install
)

# Purge package:
( cd $PKG
  find . -type f \( -name '.install*' -o -name '..install.cmd' \) -delete -print
)

mkdir -p ${PKG}/description
cp ${CWD}/descriptions/headers/* ${PKG}/description/

cd $PKG
makepkg -l ${OUT}/kernel-headers-${KVERSION}-${ARCH}-${BUILD}.tlz

# Deletes temporary directories:
if [[ $1 = -c || $1 = --clean ]]; then
  rm -rf $PKG
fi