distrobox

#!/bin/sh
# SPDX-License-Identifier: GPL-3.0-only
#
# This file is part of the distrobox project:
#    https://github.com/89luca89/distrobox
#
# Copyright (C) 2021 distrobox contributors
#
# distrobox is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 3
# as published by the Free Software Foundation.
#
# distrobox 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 distrobox; if not, see <http://www.gnu.org/licenses/>.

# POSIX
set -o errexit
set -o nounset

trap '[ "$?" -ne 0 ] && printf "\nAn error occurred\n"' EXIT

version="1.3.2"

# Print usage to stdout.
# Arguments:
#   None
# Outputs:
#   print usage with examples.
show_help() {
	cat << EOF
distrobox version: ${version}

Choose one of the available commands:
	create
	enter
	ephemeral
	list
	rm
	stop
	version
EOF
}

if [ $# -eq 0 ]; then
	show_help
	exit
fi

distrobox_path="$(dirname "${0}")"
distrobox_command="${1}"
shift

# Simple wrapper to the distrobox utilities.
# We just detect the 1st argument and launch the matching distrobox utility.
case "${distrobox_command}" in
	create)
		"${distrobox_path}"/distrobox-create "$@"
		;;
	enter)
		"${distrobox_path}"/distrobox-enter "$@"
		;;
	list)
		"${distrobox_path}"/distrobox-list "$@"
		;;
	stop)
		"${distrobox_path}"/distrobox-stop "$@"
		;;
	rm)
		"${distrobox_path}"/distrobox-rm "$@"
		;;
	generate-entry)
		"${distrobox_path}"/distrobox-generate-entry "$@"
		;;
	ephemeral)
		"${distrobox_path}"/distrobox-ephemeral "$@"
		;;
	-V | --version | version)
		printf "distrobox: %s\n" "${version}"
		exit 0
		;;
	help | --help | -h)
		if command -v man > /dev/null; then
			man distrobox || show_help
			exit 0
		fi
		show_help
		exit 0
		;;
	*) # Default case: If no more options then break out of the loop.
		printf >&2 "Error: invalid command\n"
		show_help
		exit 1
		;;
esac