#!/usr/bin/env bash
# Copyright (C) 2018  Luke Shumaker
# Copyright (C) 2023-2024  Umorpha Systems
# SPDX-License-Identifier: AGPL-3.0-or-later
declare -r NAME=osi-extract
declare -r VERSION=20231023

set -euE

install_prefix="$(realpath --logical --canonicalize-missing -- "${BASH_SOURCE[0]}/../..")"
readonly install_prefix

source "${install_prefix}/lib/osi.sh"
source "${install_prefix}/lib/argparse.sh"

main() {
	local arg_image=
	local arg_src=
	local arg_dst=
	opt_positional() {
		if (( $# != 3 )); then
			argparse:error "Expected 3 positional arguments, got %d: %s" "$#" "${*@Q}"
			return
		fi
		arg_image=$1
		arg_src=$2
		arg_dst=$(realpath -ms -- "$3")
	}
	argparse copy "$@"

	case "$opt_mode" in
		error)
			osi.sh:print "Try '%q --help' for more information" "${0##*/}" >&2
			return $EXIT_INVALIDARGUMENT
			;;
		version)
			osi.sh:print "%s (osi-tools) %s" "$NAME" "$VERSION"
			return $EXIT_SUCCESS
			;;
		help)
			osi.sh:print 'Usage: sudo %s [OPTIONS] FILENAME.img IMAGE_SRC_DIR HOST_DST_DIR' "${0##*/}"
			osi.sh:print 'Operating System Image: Extract Files'
			echo
			osi.sh:print 'OPTIONS:'
			echo "${opt_flaghelp}"
			return $EXIT_SUCCESS
			;;

		# main code starts here
		copy)
			local mountpoint
			mountpoint=$(mktemp -dt -- "${0##*/}.XXXXXXXXXX")
			trap "rmdir -- ${mountpoint@Q}" EXIT

			osi.sh:sudo -- "${install_prefix}/bin/osi-mount" --user -- "$arg_image" "$mountpoint" cp -aT -- "$mountpoint/$arg_src" "$arg_dst"
			;;

		*) osi.sh:bug 'unknown opt_mode: %s' "$opt_mode";;
	esac
}

main "$@"