#!/usr/bin/env zsh
# Copyright (c) 2016-2017 Dyne.org Foundation
# arm-sdk is written and maintained by Ivan J. <parazyd@dyne.org>
#
# This file is part of arm-sdk
#
# This source code is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This software is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this source code. If not, see <http://www.gnu.org/licenses/>.

## helper functions for arm-sdk

get-kernel-sources() {
	fn get-kernel-sources
	req=(R device_name gitkernel gitbranch)
	ckreq || return 1

	notice "grabbing kernel sources"

	if [[ $gitkernel = mainline ]]; then
		clone-git "$linuxmainline" "$R/tmp/kernels/$device_name/${device_name}-linux"
	else
		clone-git "$gitkernel" "$R/tmp/kernels/$device_name/${device_name}-linux" "$gitbranch"
	fi
}

get-kernel-firmware() {
	fn get-kernel-firmware
	req=(linuxfirmware R)
	ckreq || return 1

	notice "grabbing latest linux-firmware"

	clone-git "$linuxfirmware" "$R/tmp/linux-firmware"
}

clone-git() {
	fn clone-git "$@"
	req=(giturl clonepath)
	local giturl="$1"
	local clonepath="$2"
	local gitbr="$3"
	ckreq || return 1

	notice "grabbing $(basename $clonepath)"

	if [[ -d $clonepath ]]; then
		pushd $clonepath
			git pull
		popd
	else
		[[ -n $gitbr ]] && gitbr="$gitbr" || gitbr="master"
		git clone --depth 1 -b "$gitbr" "$giturl" "$clonepath"
	fi
}

copy-kernel-config() {
	fn copy-kernel-config
	req=(device_name)
	ckreq || return 1

	notice "copying available kernel config"
	cp -f $R/boards/kernel-configs/${device_name}.config \
		$R/tmp/kernels/$device_name/${device_name}-linux/.config
}

copy-root-overlay() {
	fn copy-root-overlay
	req=(strapdir device_name R)
	ckreq || return 1

	[[ -d $R/extra/generic-root ]] && \
		notice "copying generic-root" && \
		sudo cp -rfv $R/extra/generic-root/* $strapdir

	[[ -d $R/extra/$device_name ]] && \
		notice "copying ${device_name}-root" && \
		sudo cp -rfv $R/extra/$device_name/* $strapdir

	return 0
}

postbuild-clean() {
	fn postbuild-clean
	req=(qemu_bin strapdir)
	ckreq || return 1

	cat <<EOF | sudo tee ${strapdir}/postbuild >/dev/null
#!/bin/sh
apt-get update

# backports e2fsprogs because 4.x kernels
apt-get --yes --force-yes -t jessie-backports install e2fsprogs

apt-get --yes --force-yes upgrade
apt-get --yes --force-yes autoremove
#apt-get clean

updatedb
EOF

	chroot-script -d postbuild || zerr
	sudo rm -f $strapdir/$qemu_bin
}