# vim:expandtab:shiftwidth=4:softtabstop=4:tabstop=4:

# increment this if you have made a change that should force a new kernel
# to build built for all releases of this distribution (only -- if you want
# to force a kernel build on all distributions, update the BUILD_GEN variable
# in build/lbuild)
#BUILD_GEN+=".0"
#BUILD_GEN+=".1"	# refactor both rhel5 and rhel6
#BUILD_GEN+=".0"	# TT-107: don't cache the BUILD dir (reset major to 5)
BUILD_GEN+=".2"	# LU-9850

DEVEL_KERNEL_TYPE="devel"
RPM_HELPERS_DIR="/usr/lib/rpm/redhat"

# a method which can be overriden by the release specific code
get_rpmbuildopts() {

    return 0

}

# patching common to all releases
patch_spec_common() {

    sed -i -e '/Provides: kernel-uname-r =/a\
Provides: kernel-lustre = %{KVRA}%{?1:.%{1}}\\' \
           -e '/Provides: kernel-devel-uname-r =/a\
Provides: kernel-devel-lustre = %{KVRA}%{?1:.%{1}}\\' \
           -e '/find $RPM_BUILD_ROOT\/lib\/modules\/$KernelVer/a\
    cp -a fs/ext3/* $RPM_BUILD_ROOT/lib/modules/$KernelVer/build/fs/ext3 \
    cp -a fs/ext4/* $RPM_BUILD_ROOT/lib/modules/$KernelVer/build/fs/ext4' \
          SPECS/$SPEC_NAME 2>&1 || \
        fatal 1 "Error while editing SPECS/$SPEC_NAME"

    # XXX - a building-on-Ubuntu hack
    if grep -q "Ubuntu" /etc/issue; then
        sed  -i -e 's/^\(BuildPreReq: .*\)$/#NOU \1/g' \
               -e 's/^\(BuildRequires: .*\)$/#NOU \1/g' \
               -e 's/sha512hmac/md5sum/g' \
            SPECS/$SPEC_NAME 2>&1 || \
                fatal 1 "Error while editing SPECS/$SPEC_NAME"
    fi

}

prepare_and_build_srpm() {

	pushd $TOPDIR >/dev/null
	# create the buildid
	if $ENABLE_KERNEL_DEBUG; then
		local buildid="_lustre_debug${EXTRA_VERSION##*_lustre}"
	else
		local buildid="_lustre${EXTRA_VERSION##*_lustre}"
	fi

	# edit the SPEC with our changes
	patch_spec
	popd >/dev/null

	# copy our .config into the RPM build tree
	(echo "# $(basearch ${TARGET_ARCH})"; cat $CONFIG_FILE) > \
		SOURCES/kernel-$lnxmaj-${TARGET_ARCH}.config

	# XXX - hackity hack -- until we get (or generate from the base
	#                       config) configs for xen and debug
	local f=""
	for f in SOURCES/kernel-${lnxmaj}-*.config; do
		grep -q "^CONFIG_SD_IOSTATS=y" $f || \
		echo "CONFIG_SD_IOSTATS=y" >> $f
	done

    # do we need any special rpm build options
    local rpmbuildopt="-bb"
    if $DO_SRC; then
        rpmbuildopt="-ba"
    fi

    # stupid Ubuntu's rpm doesn't do debuginfo properly
    if [ ! -f /usr/lib/rpm/debugedit ]; then
        rpmbuildopt="$rpmbuildopt --without debuginfo"
    fi

    # XXX - need to figure this kabichk crap out -- it fails the build
    if ! $USE_KABI; then
        rpmbuildopt="$rpmbuildopt --without kabichk"
    fi

    # get any release specific build options
    rpmbuildopt="$rpmbuildopt $(get_rpmbuildopts)"

	# now build it
	if ! eval rpmbuild $rpmbuildopt --target ${TARGET_ARCH} --with baseonly \
		--define \"_topdir $TOPDIR\" \
		${buildid:+--define \"buildid $buildid\"} \
		--define \"_tmppath $TMPDIR\" \
		$TOPDIR/SPECS/$SPEC_NAME 2>&1; then
		return 1
	fi

    # for informative purposes, display a diff between the .config that
    # was actually built and what we proposed as a .config
    echo "Diffs between $(basename $CONFIG_FILE) and the built kernel's .config:"
    local rpmname="$TOPDIR/RPMS/${TARGET_ARCH}/kernel-${lnxmaj}-${lnxrel}${buildid}.${TARGET_ARCH}.rpm"
    rpmcfg=$(rpm -qpl $rpmname | grep '/boot/config-')
    rpm2cpio $rpmname | cpio -id .$rpmcfg
    diff -u $CONFIG_FILE .$rpmcfg
    rm -rf .$rpmcfg

    return 0

}

devel_kernel_name() {
    local lustre=${1:-false}

    if $lustre; then
        echo "kernel-lustre-$DEVEL_KERNEL_TYPE"
    else
        echo "kernel-$DEVEL_KERNEL_TYPE"
    fi

}

rpm_BUILD_kernel_dirname() {
    local rpmsmptype="$1"
    local lnxmaj="$2"
    local lnxmin="$3"
    local arch="$4"

    local lustre=""
    if $KERNEL_LUSTRE_NAMING; then
        $lustre="-lustre"
    fi
    echo kernel${lustre}${lnxmaj}${lnxmin}/linux-${lnxmaj}.$arch
}

find_linux_devel_paths() {
    local path="$1"
    local ARCH=$TARGET_ARCH

    # If DEVEL_PATH_ARCH is set, use it. Added for fc11 as it needs i586 string for i686.
    if [ $DEVEL_PATH_ARCH ];then
        ARCH=$DEVEL_PATH_ARCH
    fi

    LINUX=$path/usr/src/kernels/${lnxmaj}${lnxmin}-${lnxrel}${DEVEL_PATH_ARCH_DELIMETER:-"-"}${ARCH}
    # RHEL doesn't have the -obj tree
    LINUXOBJ=""

    return 0
}

unpack_linux_devel_rpm-rhel() {
    local callers_rpm="$1"

    # now just sanity check that everything needed to build properly versioned
    # modules is in place
    if [ ! -f usr/src/kernels/${lnxmaj}${lnxmin}-${lnxrel}${DEVEL_PATH_ARCH_DELIMETER:-"-"}$TARGET_ARCH/Module.symvers ]; then
        fatal 1 "cannot build kernel modules: the Kernel's Module.symvers is missing."
    fi

    return 0

}

# this of course requires a sudo rule on the builder for real RHEL:
# hudson ALL= NOPASSWD: /usr/bin/yumdownloader
# also must disable the requiretty attribute in the sudoers file
find_linux_rpm-rhel() {
    local prefix="$1"
    local wanted_kernel="$2"
    local pathtorpms=${3:-"$KERNELRPMSBASE/$lnxmaj/$DISTROMAJ/$TARGET_ARCH"}

    local tmpdir=$(mktemp -d $pathtorpms/yumXXXXXX)
    local sudo=""
    if [ "$(lsb_release -s -i)" = "RedHatEnterpriseServer" ]; then
        sudo="sudo"
    fi
    if ! $sudo yumdownloader --destdir "$tmpdir" kernel-devel-"$wanted_kernel" > /dev/null; then
        fatal 1 "failed to fetch kernel-devel-$wanted_kernel with yumdownloader."
    fi
    local rpm=$(cd $tmpdir; echo *)
    mv "$tmpdir/$rpm" "$pathtorpms"
    rmdir $tmpdir
    echo "$rpm"

    return 0

}

# This function digs out the linux release from the linux source tree
find_linux_release() {
	_find_linux_release $LINUX
}