gnuboot/modify

#!/usr/bin/env bash

#  generic scripts for modifying configs and such
#
#	Copyright (C) 2014, 2015, 2020, 2021 Leah Rowe <info@minifree.org>
#	Copyright (C) 2015 Patrick "P. J." McDermott <pj@pehjota.net>
#	Copyright (C) 2015, 2016 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/>.
#

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

projectname="$(cat projectname)"

. resources/scripts/misc/sysexits.sh

./resources/scripts/misc/versioncheck

list_modify_paths() {
	find resources/packages \
		-mindepth 2 -maxdepth 2 \
		-type d \
		-executable \
		-name "modify" \
		-printf "%P\n"
}

list_packages() {
	list_modify_paths | \
		sed 's#/.*##'
}

# Takes exactly one package as parameter
listoptions() {
	package="${1}"
	find resources/packages/"${package}/modify/" \
		-mindepth 1 -maxdepth 1 \
		-type f \
	        -printf "%P\n"
}

help() {
	cat <<- EOF
	Usage:
	        ./modify <PACKAGE> <OPTION>
	        ./modify --help

	possible values for 'package':
	$(list_packages)

	Example:	./modify coreboot configs
	Example:	./modify coreboot configs x60

	Refer to the ${projectname} documentation for more information.
	EOF
}

die() {
	ret="$1"
	shift 1

	printf 'Error: %s\n' "${@}" 1>&2
	exit "${ret}"
}

if [ $# -lt 1 ]; then
    die "${EX_USAGE}" \
	"Wrong number of arguments specified. See './modify --help'."
fi

package="${1}"

[ "${package}" = "--help" ] && help && exit 0

if [ $# -gt 1 ]; then

	option="${2}"
	shift 2

	case "${option}" in
	list)
		if [ ! -d resources/packages/"${package}" ] ; then
			die "${EX_USAGE}" \
			    "Invalid package '${package}'." \
			    " See './modify help'."
		else
			printf "Available options for package '%s':\n\n" \
			   "${package}"
			listoptions "${package}"
		fi
		;;
	all)
		for option in $(listoptions "${package}"); do
			# shellcheck disable=SC2068
			resources/packages/"${package}"/modify/"${option}" $@
		done
		;;
	*)
		if [ -d resources/packages/"${package}"/modify ]; then
			pkg_dir=resources/packages/"${package}"
			if [ -f "${pkg_dir}"/modify/"${option}" ]; then
				# shellcheck disable=SC2068
				"${pkg_dir}"/modify/"${option}" $@
			else
				help
				die "${EX_USAGE}" \
				    "Invalid option for '${package}'." \
				    " See './modify ${package} list'."
			fi
		else
			help
			die "${EX_USAGE}" \
			    "Invalid package '${package}'. See './modify help'."
		fi
	esac
else
	help
	exit 0
fi