NBash

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#!/usr/bin/env bash
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#
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# Copyright (C) 2023  Etersoft
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# Copyright (C) 2023  Vitaly Lipatov <lav@etersoft.ru>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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PROGDIR=$(dirname "$0")
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PROGNAME=$(basename "$0")
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[ -n "$EPMCURDIR" ] || export EPMCURDIR="$(pwd)"
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CMDSHELL="/usr/bin/env bash"
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# TODO: pwd for ./epm and which for epm
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[ "$PROGDIR" = "." ] && PROGDIR="$EPMCURDIR"
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if [ "$0" = "/dev/stdin" ] || [ "$0" = "sh" ] ; then
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    PROGDIR=""
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    PROGNAME=""
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fi
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# will replaced with /usr/share/eepm during install
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SHAREDIR=$PROGDIR
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load_helper()
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{
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    local shieldname="loaded$(echo "$1" | sed -e 's|-||g')"
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    # already loaded
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    eval "test -n \"\$$shieldname\"" && debug "Already loaded $1" && return
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    local CMD="$SHAREDIR/$1"
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    # do not use fatal() here, it can be initial state
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    [ -r "$CMD" ] || { echo "FATAL: Have no $CMD helper file" ; exit 1; }
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    eval "$shieldname=1"
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    # shellcheck disable=SC1090
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    . $CMD
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}
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load_helper epm-sh-functions
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esu_print_help()
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{
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    cat <<EOF
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esu - get root shell or run a command in root shell
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Usage: esu [-c] [<command>]
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EOF
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}
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if [ "$1" = "-h" ] || [ "$1" = "--help" ] ; then
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    esu_print_help
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    exit
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fi
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# just ignore
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if [ "$1" = "-c" ] ; then
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    shift
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fi
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# just ignore
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if [ "$1" = "-" ] ; then
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    shift
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fi
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esu "$@"
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