#!/bin/bash

#  helper script: downloads coreboot and patches/deblobs it
#
#	Copyright (C) 2014, 2015, 2016 Francis Rowe <info@gluglug.org.uk>
#	Copyright (C) 2015 Paul Kocialkowski <contact@paulk.fr>
#
#    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

if [ -f "version" ]; then
	# _src release archive is being used
	version="libreboot-$(cat version)"
else
	# git repo is being used
	version="libreboot-$(git describe --tags HEAD)"
fi

make_coreboot_src_directory() {
    payload="${1}"
    cbrevision="${2}"
    vbootrevision="${3}"
    firmwarepath="${4}" # libreboot_src/coreboot/
(
    cd "${firmwarepath}/"
    # copy coreboot directory there
    rm -Rf "${payload:?}/${cbrevision:?}/"
    if [ ! -d "${payload}/" ]; then
        mkdir -p "${payload}/"
    fi
    cp -R "coreboot/" "${payload}/${cbrevision}/"

    # We need to reset that revision of coreboot to the specified revision
    cd "${payload}/${cbrevision}/"
    git reset --hard ${cbrevision}

    if [ "${vbootrevision}" != "no_vboot_revision" ]; then
        # reset vboot revision. in practise, we always use the same
        # vboot revision on all boards that use a given coreboot revision
        cd "3rdparty/vboot/"
        git reset --hard ${vbootrevision}
    fi
)
}


# coreboot revisios used for crossgcc
crossgccrevision="4351ace145c4069f9c93ca7541d6dfaf8300b53b"

printf "Downloading coreboot, patching coreboot and deblobbing coreboot\n"

# This grabs current base used, and applies patches
# This is also used to run the deblob scripts.

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

rm -Rf "coreboot/"

mkdir "coreboot/"

cd "coreboot/"

# Get latest coreboot:
# ------------------------------------------------------------------------------

# download it using git
git clone https://review.coreboot.org/coreboot

# there are modifications required
cd "coreboot/"

# Define a common version (based on the libreboot version)
# Most likely redundant, because the build system needs to update
# this every time when building a ROM image anyway
printf '%s\n' "${version}" >".coreboot-version"

# vboot submodule is needed
# ------------------------------------------------------------------------------

git submodule update --init --checkout -- 3rdparty/vboot/

# Create branches, with patches in each branch
# Create separate coreboot source directories *for each board*
# ------------------------------------------------------------------------------

for payloads in ../../resources/libreboot/config/*; do

	if [ ! -d "${payloads}/" ]; then
		continue
	fi

	payload="${payloads##*/}"

	for boardconfig in ../../resources/libreboot/config/${payload}/*; do

		if [ ! -d "${boardconfig}/" ]; then
			continue
		fi

		cbrevision=$(cat "${boardconfig}/cbrevision")
		vbootrevision=$(cat "${boardconfig}/vbootrevision")

        # the same vboot revision is always used for coreboot revision,
        # so we don't need to wworry about checking for that here

        if [ -d "../${cbrevision}/${cbrevision}" ]; then
            continue
            # the directory already exists, no need to recreate it
        fi

		make_coreboot_src_directory ${cbrevision} ${cbrevision} ${vbootrevision} ..
	done
done



# prepare directory for crossgcc
rm -Rf "../../crossgcc/"
make_coreboot_src_directory crossgcc ${crossgccrevision} "no_vboot_revision" ..
(
    cd "../crossgcc/${crossgccrevision}"
    reset_at_revision ${crossgccrevision}
    rm -Rf "3rdparty/"

    # Put this in its own separate directory 
    rm -Rf "../../../crossgcc"
    cd ../
    mv "${crossgccrevision}/" "crossgcc/"
    mv "crossgcc/" ../../
    cd ../
    rm -Rf "crossgcc/"
)

# go back to _src/coreboot/ (containing all coreboot directories)
cd "../"
# delete the gitted one (not needed anymore)
rm -Rf "coreboot/"

# Run coreboot-libre deblob scripts
# ------------------------------------------------------------------------------

printf "Deleting .git* in coreboot/ (history inside .git contains the blobs that were deleted)\n"
rm -Rf */*/.git* ../crossgcc/*.git
rm -Rf */*/3rdparty/*/.git*

# Delete crossgcc from non-crossgcc coreboot archives
# (the build system will create symlinks later when building the ROM images)
for payload in *; do
	if [ "${payload##*/}" != "crossgcc" ]; then
		rm -Rf ${payload:?}/*/util/crossgcc/
	fi
done
cd "../"

printf "Deblobbing coreboot\n"
./resources/utilities/coreboot-libre/deblob

printf "\n\n"