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#!/bin/sh -e
#
#    byobu-select-backend
#    Copyright (C) 2011-2014 Dustin Kirkland
#
#    Authors: Dustin Kirkland <kirkland@byobu.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, version 3 of the License.
#
#    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/>.


PKG="byobu"
[ -r "$HOME/.byoburc" ] && . "$HOME/.byoburc"
[ -z "${BYOBU_PREFIX}" ] && export BYOBU_PREFIX="/usr" || export BYOBU_PREFIX
. "${BYOBU_PREFIX}/lib/${PKG}/include/common"

usage () {
	cat <<EOT
Usage: $0 [screen|tmux]

    Without any parameters, it runs interactively.
EOT
	exit 1
}

prompt() {
	local choice
	echo
	echo "Select the byobu backend:"
	echo "  1. tmux"
	echo "  2. screen"
	echo
	printf "Choose 1-2 [1]: "
	choice=$(head -n1)
	case $choice in
		1|"") _RET="tmux" ;;
		2) _RET="screen" ;;
		*) prompt ;;
	esac
}

case $1 in
	"")
		prompt
		choice="$_RET"
	;;
	screen|tmux)
		choice="$1"
	;;
	*)
		usage
	;;
esac
echo "BYOBU_BACKEND=$choice" > "$BYOBU_CONFIG_DIR/backend"