mtps-setup

#!/usr/bin/bash -efu

# 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; either version 2 of the License, or
# (at your option) any later version.
#
# 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 LICENSE for more details.
#
# Copyright: Red Hat Inc. 2023
# Author: Andrei Stepanov <astepano@redhat.com>

#
# This file is `source` by all mini-tps scripts
#

# What command to used for yum/dnf command defined by next priority:
# 1. Env variable MINITPSYUMDNFCMD
# 2. If /usr/bin/yum is symlink:
#
#   * read this symlink
#   * <=f40, <= c10s, <= rhel10:
#
#      lrwxrwxrwx. 1 root root 5 May 29 00:00 /usr/bin/yum -> dnf-3
#
#   * >=F41:
#
#      lrwxrwxrwx. 1 root root 4 Jul 19 00:00 /usr/bin/yum -> dnf5
#
# 3. If /usr/bin/yum is present then use `yum`
# 4. Else use `dnf`
#

YUMDNFCMD="${MINITPSYUMDNFCMD:-}"

if [ -z "$YUMDNFCMD" ]; then
    if [ -f "/usr/bin/yum" ]; then
        YUMDNFCMD="yum"
        if [ -L "/usr/bin/yum" ]; then
            YUMDNFCMD="$(readlink "/usr/bin/yum")"
        fi
    else
        YUMDNFCMD="dnf"
    fi
fi

debug() {
    if [[ -n "${DEBUG:-}" || -n "${GB_DEBUG:-}" ]]; then
        echo -e "$*" >&2
    fi
}