#!/bin/sh
#
# 2010-2011 Nico Schottelius (nico-cdist at schottelius.org)
# 2014 Steven Armstrong (steven-cdist at armstrong.cc)
#
# This file is part of cdist.
#
# cdist 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 3 of the License, or
# (at your option) any later version.
#
# cdist 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 cdist. If not, see <http://www.gnu.org/licenses/>.
#
#
# All os variables are lower case.  Keep this file in alphabetical
# order by os variable except in cases where order otherwise matters,
# in which case keep the primary os and its derivatives together in
# a block (see Debian and Redhat examples below).
#

chroot="$(cat "$__object/parameter/chroot")"

if grep -q ^Amazon "$chroot/etc/system-release" 2>/dev/null; then
   echo amazon
   exit 0
fi

if [ -f "$chroot/etc/arch-release" ]; then
   echo archlinux
   exit 0
fi

if [ -f "$chroot/etc/cdist-preos" ]; then
   echo cdist-preos
   exit 0
fi

### Debian and derivatives
if grep -q ^DISTRIB_ID=Ubuntu "$chroot/etc/lsb-release" 2>/dev/null; then
   echo ubuntu
   exit 0
fi

if [ -f "$chroot/etc/debian_version" ]; then
   echo debian
   exit 0
fi
###

if [ -f "$chroot/etc/gentoo-release" ]; then
   echo gentoo
   exit 0
fi

if [ -f "$chroot/etc/openwrt_version" ]; then
    echo openwrt
    exit 0
fi

if [ -f "$chroot/etc/owl-release" ]; then
   echo owl
   exit 0
fi

### Redhat and derivatives
if grep -q ^AlmaLinux "$chroot/etc/redhat-release" 2>/dev/null; then
    echo almalinux
    exit 0
fi

if grep -q ^CentOS "$chroot/etc/redhat-release" 2>/dev/null; then
    echo centos
    exit 0
fi

if grep -q ^Fedora "$chroot/etc/redhat-release" 2>/dev/null; then
   echo fedora
   exit 0
fi

if [ -f "$chroot/etc/redhat-release" ]; then
   echo redhat
   exit 0
fi
###

if [ -f "$chroot/etc/SuSE-release" ]; then
   echo suse
   exit 0
fi

if [ -f "$chroot/etc/slackware-version" ]; then
   echo slackware
   exit 0
fi

echo "Unknown OS" >&2
exit 1