#!/bin/bash

#  helper script: Downloads GRUB and patches it.
#
#	Copyright (C) 2014, 2015 Francis Rowe <info@gluglug.org.uk>
#
#    This program 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 program 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 program.  If not, see <http://www.gnu.org/licenses/>.
#

# This script assumes that the working directory is the
# root of libreboot_src or libreboot git.

[ "x${DEBUG+set}" = 'xset' ] && set -v
set -u -e

# Get GRUB, revert to commit last used and apply patches.

# Remove the old version that may still exist
# ------------------------------------------------------------------------------

printf "Downloading GRUB\n"

rm -Rf grub

# Get latest GRUB
# ------------------------------------------------------------------------------

# download it using git
git clone git://git.savannah.gnu.org/grub.git

# modifications are required
cd grub

# Reset to the last commit that was tested
# ------------------------------------------------------------------------------

git reset --hard fa07d919d1ff868b18d8a42276d094b63a58e299

# Apply patches
# ------------------------------------------------------------------------------

# Replace "GNU GRUB version" in GRUB screen with "FREE AS IN FREEDOM"
git am "../resources/grub/patch/0001-grub-core-normal-main.c-Display-FREE-AS-IN-FREEDOM-n.patch"

# See 0002-lib-syslinux_parse-add-support-for-vesa-menu.c32.patch
# Wait for it or an improved version of it to be merged, then update GRUB and delete the patch file
# https://people.torproject.org/~lunar/volatile/2015-03-17-e3Yp1d7FifQ/0001-lib-syslinux_parse-add-support-for-vesa-menu.c32.patch
git am "../resources/grub/patch/0002-lib-syslinux_parse-add-support-for-vesa-menu.c32.patch"

cd ../
printf "\n\n"

# ------------------- DONE ----------------------