#!/usr/bin/env sh

# Generic script for downloading programs used by the build system
#
#	Copyright (C) 2014,2015,2020,2021,2023 Leah Rowe <info@minifree.org>
#	Copyright (C) 2015 Patrick "P. J." McDermott <pj@pehjota.net>
#	Copyright (C) 2015, 2016 Klemens Nanni <contact@autoboot.org>
#	Copyright (C) 2022 Caleb La Grange <thonkpeasant@protonmail.com>
#	Copyright (C) 2022 Alper Nebi Yasak <alpernebiyasak@gmail.com>
#
#	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/>.
#

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

download=resources/scripts/download
program=""

main()
{
	./.gitcheck
	./resources/scripts/misc/versioncheck

	rm -f "build_error"

	if [ $# -lt 1 ]; then
		help
		die "Please specify arguments."
	fi

	program="${1}"
	shift 1

	if [ "${program}" = help ]; then
		help
		exit 0
	elif [ "${program}" = "all" ]; then
		for downloadProgram in ${download}/*; do
			if [ ! -f "${downloadProgram}" ]; then
				continue
			fi
			"${downloadProgram}"
		done
		exit 0
	elif [ ! -f "${download}/${program}" ]; then
		help
		die "Invalid argument '${program}'. See: './download help'."
	elif [ $# -lt 1 ]; then	
		"${download}/${program}"
	else	
		"${download}/${program}" $@
	fi

	./.gitcheck clean
}

help() {
	cat <<- EOF
	USAGE:	./download <PROGRAM> <OPTIONS>

	possible values for 'program':
	$(listprograms)

	Example:	./download flashrom
	Example:	./download coreboot

	Some program options allow for additional parameters:
	Example:	./download coreboot default
	Example:	./download coreboot x60

	Each program download script should work without extra paramaters, but
	they can be used. For example, './download coreboot' will download all
	coreboot trees by default, but './download coreboot x60' will only
	download the coreboot tree required for the target: x60

	Each program download script should also accept the --help parameter to
	display the usage of the script.
	
	Refer to the documentation for more information.
	EOF
}

listprograms() {
	for program in "${download}"/*; do
		printf '%s\n' "${program##*/}"
	done
}

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

main $@