#!/bin/bash

set -e

source "${BUILD_SCRIPT_ROOT}"/helpers
setup-repo-vars

#Translate
#  https://android-build.linaro.org/jenkins/job/doanac_build-script-generation/6/
# into
#  http://snapshots.linaro.org/android/~doanac/build-script-generation/6/
SNAPSHOT_URL=${BUILD_URL/http*jenkins\/job\//http://snapshots.linaro.org/android/~}
# change the dash in doanac_build... to doanac/build...
SNAPSHOT_URL=${SNAPSHOT_URL/_/\/}

CLICKTHROUGH=0
[ ${TARGET_PRODUCT} == 'snowball' ] && CLICKTHROUGH=1
[ ${TARGET_PRODUCT} == 'origen' ] && CLICKTHROUGH=1

OPTS="d:ht"

[ $CLICKTHROUGH ] && OPTS="c:d:ht"
[ $CLICKTHROUGH ] && CLICKTHROUGH_OPT="-c .config"
[ $CLICKTHROUGH ] && CLICKTHROUGH_OPT_CASE="c   ) CFG=\$OPTARG;;"
[ $CLICKTHROUGH ] && CLICKTHROUGH_MSG="\" -c .config file   The kernel config file from the build. Download from:\n        ${SNAPSHOT_URL}/kernel_config\n                   from a browser with cookies enabled.\""

header()
{
	cat <<EOF
#!/bin/bash

set -e

EXACT=1
DIR=linaro-kernel

CPUS=\`grep -c processor /proc/cpuinfo\`

usage()
{
	echo 'Usage: \$0 ${CLICKTHROUGH_OPT}[ -t -d directory ]'
	echo -e ${CLICKTHROUGH_MSG}
	echo " -t                Reproduce the from the tip of the branch rather than doing"
	echo "                   an exact replica build"
	echo " -d <directory>    The directory to download code and build from"
	echo "                   Default: \${DIR}"
	exit 1
}

while getopts   "${OPTS}" optn; do
	case    \$optn   in
		d   ) DIR=\$OPTARG;;
		t   ) EXACT=0;;
		${CLICKTHROUGH_OPT_CASE}
		h   ) usage; exit 1;;
        esac
done

EOF
if [ $CLICKTHROUGH -eq 1 ] ; then
	echo "[ \$CFG ] || usage"
	echo
fi
}

sync_commands()
{
KERNELNAME=`python -c "import os.path; print os.path.relpath(os.path.realpath('target/product/$TARGET_OUT_DIR/obj/kernel/source'), '../')"`
GITINFO=`PYTHONPATH=../.repo/repo ${BUILD_SCRIPT_ROOT}/repo_project_info.py -d ../ -p ${KERNELNAME}`
#echo "# $GITINFO"
GITURL=`echo $GITINFO | cut -d\| -f1`
GITREV=`echo $GITINFO | cut -d\| -f2`
	cat <<EOF
# download the kernel
if [ -d \${DIR} ] ; then
	echo "Directory \${DIR} exists. If the kernel code exists in this directory you may continue without cloning the git repository for the kernel. Are you sure you want to do this? (y/n) "
	read CONTINUE
	[ \${CONTINUE} == y ] || exit 1
else
	git clone $GITURL \$DIR
fi

cd \$DIR
git checkout $GITREV

EOF
if [ $CLICKTHROUGH -eq 0 ] ; then
	echo "# download the kernel config"
	echo "curl -q $SNAPSHOT_URL/kernel_config> linaro_kernel_config"
	echo
fi
}

build_commands()
{
if [ $CLICKTHROUGH -eq 1 ] ; then
	CP_CMD="cp \$CFG out/.config"
else
	CP_CMD="cp linaro_kernel_config out/.config"
fi
	cat <<EOF
# build the code
CROSS_COMPILE=\`which arm-linux-gnueabi-gcc |sed -e 's,gcc,,'\`
[ -d out ] || mkdir out
[ -f out/.config ] || $CP_CMD
if [[ \`grep 'CONFIG_ARCH_MULTIPLATFORM=y' out/.config\` ]]; then
	KERNEL_IMAGE=zImage
else
	KERNEL_IMAGE=uImage
fi
make -j\${CPUS} O=out ARCH=arm CROSS_COMPILE=\$CROSS_COMPILE \$KERNEL_IMAGE modules
mkdir out/modules_for_android
make O=out ARCH=arm modules_install INSTALL_MOD_PATH=modules_for_android
EOF
}

{
	header
	sync_commands
	build_commands
} > linaro_kernel_build_cmds.sh
chmod +x linaro_kernel_build_cmds.sh