linux/.config/bash/module/pack.sh

_UNPACK_SUPPORTED=".tar$|.tgz$|.txz$|.tar.gz$|.tar.xz$|.zip$|.iso$|.rar$"

# Pack files into desired format.
# Usage: pack <TARGET.ext> [FILES]
pack() {
	local IFS=$'\n'
	local output="${1}"
	local targets=("${@:2}")
	local format="${output##*.}"
	local name="${output%.*}"

	# report no output.
	if [[ "${output}" = "" ]]; then
		echo "Usage: pack <TARGET.ext> [FILES]"
		return 2
	fi

	# report no format.
	if [[ "${format}" = "" ]]; then
		echo "Could not determine output format."
		echo "Usage: pack <TARGET.ext> [FILES]"
		return 2
	fi

	# All targets by default.
	if [[ "${targets}" = "" ]]; then
		targets=($(ls))
	fi

	# process.
	case "${format}" in
		"tgz")
			_pack_tgz "${output}" "${targets[@]}"
			;;
		"txz")
			_pack_txz "${output}" "${targets[@]}"
			;;
		"tar")
			_pack_tar "${output}" "${targets[@]}"
			;;
		"zip")
			_pack_zip "${output}" "${targets[@]}"
			;;
		"gz")
			_pack_gz "${output}" "${targets[@]}"
			;;
		"xz")
			_pack_xz "${output}" "${targets[@]}"
			;;
		*)
			echo -e "${color_bred}${target}: Format not supported.${color_default}"
			return 1
			;;
	esac

	# Show error.
	if [[ $? != 0 ]]; then
		echo -e "${color_bred}${target}: Failed.${color_default}"
	fi
}

# attempt to unpack everything.
# usage: unpack [FILES]
unpack() {
	local IFS=$'\n'
	local targets=("${@}")
	local count=0
	local total=${#targets[@]}
	local failed=0

	# All targets by default.
	if [[ "${targets}" = "" ]]; then
		targets=($(ls | grep -E ${_UNPACK_SUPPORTED}))
		total=${#targets[@]}
	fi

	# process all files.
	for target in "${targets[@]}"; do
		# increment counter.
		((count++))

		# prepare status.
		local status="[${count}/${total}] ${target}"

		# show status.
		echo -e "${status}"

		# unpack file type.
		local type="${target##*.}"

		[[ "${target}" =~ .tar.gz$ ]] && type="tar.gz"
		[[ "${target}" =~ .tar.xz$ ]] && type="tar.xz"

		# unpack content.
		case "${type,,}" in
			"zip")
				_unpack_zip "${target}"
				;;
			"7z")
				_unpack_7z "${target}"
				;;
			"tgz"|"tar.gz")
				_unpack_tgz "${target}"
				;;
			"txz"|"tar.xz")
				_unpack_txz "${target}"
				;;
			"tar")
				_unpack_tar "${target}"
				;;
			"iso")
				_unpack_iso "${target}"
				;;
			"rar")
				_unpack_rar "${target}"
				;;
			"xz")
				_unpack_xz "${target}"
				;;
			"gz")
				_unpack_gz "${target}"
				;;
			*)
				echo -e "${color_bred}${target}: Format not supported.${color_default}"
				((failed++))
				continue
				;;
		esac

		# actions on error.
		if [[ $? != 0 ]]; then
			echo -e "${color_bred}${target}: Failed.${color_default}"
			((failed++))
		fi
	done

	if [[ ${failed} != 0 ]]; then
		echo -e "${color_bred}Failed: ${failed}.${color_default}"
		false
	fi
}

_pack_zip() {
	zip -9 -r "${@}"
}

_pack_tgz() {
	tar -c "${@:2}" | pv -s $(du -csb "${@:2}" | sed -n -e '$p' | awk '{print $1}') | gzip -1 > "${1}"
}

_pack_txz() {
	tar -c "${@:2}" | pv -s $(du -csb "${@:2}" | sed -n -e '$p' | awk '{print $1}') | xz -9e > "${1}"
}

_pack_tar() {
	tar -c "${@:2}" | pv -s $(du -csb "${@:2}" | sed -n -e '$p' | awk '{print $1}') > "${1}"
}

_pack_gz() {
	pv "${2}" | gzip -1 > "${1}"
}

_pack_xz() {
	pv "${2}" | xz -9e > "${1}"
}

_unpack_zip() {
	unzip "${1}"
}

_unpack_7z() {
	7za x "${1}"
}

_unpack_tgz() {
	pv "${1}" | gzip -d | tar -xf -
}

_unpack_txz() {
	pv "${1}" | xz -d | tar -xf -
}

_unpack_tar() {
	pv "${1}" | tar -xf -
}

_unpack_iso() {
	7za x "${1}"
}

_unpack_rar() {
	unrar x "${1}"
}

_unpack_gz() {
	pv "${1}" | gzip -d > "${1%.gz}"
}

_unpack_xz() {
	pv "${1}" | xz -d > "${1%.xz}"
}

# export functions.
export -f pack unpack _pack_tgz _pack_txz _pack_tar _pack_zip _unpack_zip _unpack_7z _unpack_tgz _unpack_txz _unpack_tar _unpack_iso _unpack_rar _pack_gz _pack_xz _unpack_gz _unpack_xz