#!/bin/bash
set -e

# Override using a local kernel build
if [ -e ${DAPPER_SOURCE}/assets/kernel.tar.gz ]; then
    echo "copying ${DAPPER_SOURCE}/assets/kernel.tar.gz ${DOWNLOADS}/kernel.tar.gz"
    cp ${DAPPER_SOURCE}/assets/kernel.tar.gz ${DOWNLOADS}/kernel.tar.gz
fi

if [ -e ${DOWNLOADS}/kernel.tar.gz ]; then
    mkdir -p ${BUILD}/kernel
    tar xf ${DOWNLOADS}/kernel.tar.gz -C ${BUILD}/kernel

    for i in vmlinuz vmlinux; do
        if [ -e ${BUILD}/kernel/boot/${i}-* ]; then
            mkdir -p ${ARTIFACTS}
            # frustratingly, the vmlinuz versioned filename != the tag name, so we need to do some guessing
            # for eg, 4.9-rc8-rancher2 is called vmlinuz-4.9.0-rc8-rancher
            echo "Copy ${BUILD}/kernel/boot/${i}-* to ${ARTIFACTS}/vmlinuz-${KERNEL_VERSION}"
            cp ${BUILD}/kernel/boot/${i}-* ${ARTIFACTS}/vmlinuz-${KERNEL_VERSION}
            # use an unversioned filename for `scripts/run`
            cp ${BUILD}/kernel/boot/${i}-* ${BUILD}/kernel/vmlinuz
            break
        fi
    done

    # TODO: move these into a separate tar.gz and add to the syslinux initrd line
    if [ -d ${BUILD}/kernel/lib ]; then
        rm -rf ${INITRD_DIR}/usr/lib
        cp -rf ${BUILD}/kernel/lib ${INITRD_DIR}/usr/
        depmod -b ${INITRD_DIR}/usr $(basename ${INITRD_DIR}/usr/lib/modules/*)

        #TODO:
        # new: put the kernel modules into their own initrd file
        #mkdir -p ${BUILD}/kernel-fs/usr/
        #pushd .
        #cp -rf ${BUILD}/kernel/lib ${BUILD}/kernel-fs/usr/
        #depmod -b ${BUILD}/kernel-fs/usr $(basename ${BUILD}/kernel-fs/usr/lib/modules/*)
        ## and then package it up cpio
        #cd ${BUILD}/kernel-fs/
        #echo Creating kernel ${ARTIFACTS}/linuxmods-${KERNEL_VERSION}

        #if [ "$COMPRESS" == "" ]; then
        #    COMPRESS="gzip -1"
        #fi
        #find | cpio -H newc -o | ${COMPRESS} > ${ARTIFACTS}/linuxmods-${KERNEL_VERSION}
        #popd
        #echo Done creating kernel ${ARTIFACTS}/linuxmods-${KERNEL_VERSION}
        ## use an unversioned filename for `scripts/run`
        #cp ${ARTIFACTS}/linuxmods-${KERNEL_VERSION} ${BUILD}/kernel/linuxmods
    fi
else
    if [ "$ARCH" == "amd64" ]; then
        echo "no ${DOWNLOADS}/kernel.tar.gz found"
        exit 1
    fi
fi

if [ "$ARCH" == "amd64" ]; then
    ls -lah ${ARTIFACTS}/vmlinuz-*
    if [ ! -e "${ARTIFACTS}/vmlinuz-${KERNEL_VERSION}" ]; then
        echo "Can't find ${ARTIFACTS}/vmlinuz-${KERNEL_VERSION}"
        exit -1
    fi
fi