distrobox-ephemeral

#!/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
# Optional env variables:
#	DBX_CONTAINER_MANAGER
#   DBX_CONTAINER_NAME
#   DBX_NON_INTERACTIVE
#	DBX_SUDO_PROGRAM

# Dont' run this command as sudo.
if [ "$(id -u)" -eq 0 ]; then
	printf >&2 "Running %s as sudo is not supported.\n" "$(basename "${0}")"
	printf >&2 " try instead running:\n"
	printf >&2 "	%s --root %s\n" "$(basename "${0}")" "$*"
	exit 1
fi

container_command=""
create_flags=""
distrobox_path="$(dirname "${0}")"
extra_flags=""
rootful=0
verbose=0
version="1.4.1"

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

Usage:

	distrobox-ephemeral --name container-name [--force]

Options:

	--root/-r:		launch podman/docker with root privileges. Note that if you need root this is the preferred
				way over "sudo distrobox" (note: if using a program other than 'sudo' for root privileges is necessary,
				specify it through the DBX_SUDO_PROGRAM env variable, or 'distrobox_sudo_program' config variable)
	--verbose/-v:		show more verbosity
	--help/-h:		show this message
	--/-e:			end arguments execute the rest as command to execute at login	default: bash -l
	--version/-V:		show version

See also:

	distrobox-create --help

	for a list of additional flags to specify during the creation.
	distrobox-ephemeral can use all flags from distrobox-create.

EOF
}

# Parse arguments
while :; do
	case $1 in
		-h | --help)
			# Call a "show_help" function to display a synopsis, then exit.
			show_help
			exit 0
			;;
		-r | --root)
			shift
			rootful=1
			;;
		-v | --verbose)
			verbose=1
			shift
			;;
		-V | --version)
			printf "distrobox: %s\n" "${version}"
			exit 0
			;;
		-e | --exec | --)
			shift
			container_command="-- $*"
			break
			;;
		*) # Default case: If no more options then break out of the loop.
			# If we have a flagless option and container_name is not specified
			# then let's accept argument as container_name
			if [ -n "$1" ]; then
				create_flags="${create_flags} $1"
				shift
			else
				break
			fi
			;;
	esac
done

set -o nounset
# set verbosity
if [ "${verbose}" -ne 0 ]; then
	set -o xtrace
	extra_flags="${extra_flags} --verbose"
fi

# prepend sudo (or the specified sudo program) if we want podman or docker to be rootful
if [ "${rootful}" -ne 0 ]; then
	extra_flags="${extra_flags} --root"
fi

name=$(mktemp -u distrobox-XXXXXXXXXX)
# shellcheck disable=SC2086
"${distrobox_path}"/distrobox-create --name ${name} --yes ${create_flags} ${extra_flags}
# shellcheck disable=SC2086
"${distrobox_path}"/distrobox-enter "${name}" ${container_command} ${extra_flags}
# shellcheck disable=SC2086
"${distrobox_path}"/distrobox-stop "${name}" --yes ${extra_flags}
# shellcheck disable=SC2086
"${distrobox_path}"/distrobox-rm --force "${name}" --yes ${extra_flags}