#!/bin/bash

#  helper script: builds the dependencies that coreboot needs before building a ROM image
#
#	Copyright (C) 2014, 2015, 2016 Leah Rowe <info@minifree.org>
#	Copyright (C) 2015 Klemens Nanni <contact@autoboot.org>
#
#    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 git or release archive

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

# Build utilities needed in coreboot directory
# --------------------------------------------------------------------

printf "Building the utilities in coreboot\n"

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

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

		reused_coreboot_patches="resources/libreboot/patch/coreboot/${cbrevision}/${payload}/${boardname}/reused.list"
		reused_vboot_patches="resources/libreboot/patch/vboot/${vbootrevision}/${payload}/${boardname}/reused.list"
		for reused_patches in "${reused_coreboot_patches}" "${reused_vboot_patches}"; do
			if [ -f "${reused_patches}" ]; then
				for patch in $(cat "${reused_patches}"); do
					if [ ! -f "./${patch}" ]; then
						printf "%s listed in %s does not exist\n" "${patch}" "${reused_patches}"
						exit 1
					fi
				done
			fi
		done

	done
done

# sanity check (check for invalid paths in the reused.list patch lists before proceeding)
# in ascending filename order, apply patches from a directory
apply_patches_from_directory() {
	patch_directory="${1}" # directory containing the patch files

	if [ -d "${patch_directory}" ]; then
		for patch in ${patch_directory}/*.patch;  do

			if [ "${patch##*/}" = "*.patch" ]; then # oh so ugly
				continue # ugly ugly ugly ugly ugly
			fi # most hideous thing you've ever seen

			git am "${patch}" || return 1
		done
	fi
}
# files listed in the file (if found) are absolute paths, relative to the root of the libreboot src directory
# the file lists patches patches that should be applied
apply_patches_from_file() {
	patch_list="${1}" # file listing the paths to all the patches
	libreboot_src_root="${2}" # path to the root of the libreboot_src directory

	if [ -f "${patch_list}" ]; then
		for patchname in $(cat "${patch_list}"); do
			git am "${libreboot_src_root}/${patchname}" || return 1
		done
	fi
}

create_branch() {
	branchname="${1}"
    git branch ${branchname}
    git checkout ${branchname}
    git checkout master
}

# use git-init on everything
# this is so that we can then apply patche
# for these revisions of vboot and coreboot
for i in coreboot/*; do
    if [ ! -d "${i}/" ]; then
        continue
    fi
    for revision in ${i}/*; do
        if [ ! -d "${revision}/" ]; then
            continue
        fi
        (
        cd "${revision}/"
        git init
        git add -A .
        git commit -m "coreboot revision ${revision##*/}"
        cd "3rdparty/vboot/"
        git init
        git add -A .
        git commit -m "coreboot revision ${revision##*/}"
        )
    done
done

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

		boardname="${boardconfig##*/}"
		cbrevision=$(cat "${boardconfig}/cbrevision")
		vbootrevision=$(cat "${boardconfig}/vbootrevision")
        branchname="${payload}_${boardname}"

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

		# patch that version
		(

			cd "coreboot/${cbrevision}/${cbrevision}/"
			create_branch ${branchname}

            git checkout ${branchname}

			# apply patches (coreboot, common to all systems using this revision)
			apply_patches_from_directory "../../../resources/libreboot/patch/common/coreboot/${cbrevision}"
			# apply patches re-used from other boards, before applying main patches (common patches for similar boards)
			apply_patches_from_file "../../../resources/libreboot/patch/coreboot/${cbrevision}/${payload}/${boardname}/reused.list" ../../..
			# apply patches (coreboot, machine-specific for this revision)
			apply_patches_from_directory "../../../resources/libreboot/patch/coreboot/${cbrevision}/${payload}/${boardname}"

            git checkout master

			cd "3rdparty/vboot/"
			# reset to known revision (vboot)
			create_branch ${branchname}

            git checkout ${branchname}

			# apply patches (vboot, common to all systems using this revision)
			apply_patches_from_directory "../../../../../resources/libreboot/patch/common/vboot/${vbootrevision}"
			# apply patches re-used from other boards, before applying main patches (common patches for similar boards)
			apply_patches_from_file "../../../../../resources/libreboot/patch/vboot/${vbootrevision}/${payload}/${boardname}/reused.list" ../../../../..
			# apply patches (vboot, machine-specific for this revision)
			apply_patches_from_directory "../../../../../resources/libreboot/patch/vboot/${vbootrevision}/${payload}/${boardname}"

            git checkout master

		)
	done
done

# build coreboot utilities (in each revision) and
# create symlinks to the crossgcc archive
for payload in coreboot/*; do
	for board in "${payload}/"*; do

	# cbfstool, cbmem, nvramtool
	for util in {cbfs,nvram}tool cbmem; do
		make -BC "${board}/util/${util}"
	done
	# create symlink to crossgcc
	(
	cd "${board}/util/"
	ln -s "../../../../crossgcc/util/crossgcc/" crossgcc
	)

	done
done