#!/bin/sh
# postinst script for openmpi
#
# see: dh_installdeb(1)

set -e

xcatd_init_compat=/opt/xcat/share/xcat/scripts/xcatd-init-compat
xcatd_init_state=/opt/xcat/share/xcat/scripts/xcatd-init-state
xcatd_state_dir=/var/lib/xcat/xcatd-init-state
xcatd_context_file=$xcatd_state_dir/context

if [ -L "$xcatd_state_dir" ] || \
   { [ -e "$xcatd_state_dir" ] && [ ! -d "$xcatd_state_dir" ]; }; then
    echo "Invalid xcatd init state directory: $xcatd_state_dir" >&2
    exit 1
fi

if "$xcatd_init_compat" uses-systemd --explicit-target; then
    xcatd_uses_systemd=yes
else
    xcatd_uses_systemd=no
fi

if [ -r "$xcatd_context_file" ]; then
    xcatd_transition_context=$(cat "$xcatd_context_file")
    case "$xcatd_transition_context" in
        fresh|upgrade) ;;
        *)
            echo "Invalid xcatd package transition context: $xcatd_transition_context" >&2
            exit 1
            ;;
    esac
elif [ "$1" = configure ] && [ -n "${2:-}" ]; then
    # Preserve state when invoked for an already configured package even if a
    # prior packaging tool did not provide the explicit preinst context.
    xcatd_transition_context=upgrade
else
    xcatd_transition_context=fresh
fi

if [ "$xcatd_uses_systemd" = yes ]; then
    if [ "$1" = configure ]; then
        "$xcatd_init_state" prepare-systemd "$xcatd_transition_context"
    fi
    if command -v dpkg-maintscript-helper >/dev/null 2>&1 && \
       dpkg-maintscript-helper supports rm_conffile; then
        dpkg-maintscript-helper rm_conffile /etc/init.d/xcatd -- "$@"
    fi
fi

# summary of how this script can be called:
#        * <postinst> `configure' <most-recently-configured-version>
#        * <old-postinst> `abort-upgrade' <new version>
#        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
#          <new-version>
#        * <postinst> `abort-remove'
#        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
#          <failed-install-package> <version> `removing'
#          <conflicting-package> <version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package


case "$1" in
    configure)
        . /etc/profile.d/xcat.sh

        if [ "$xcatd_uses_systemd" = yes ]; then
            if command -v update-rc.d >/dev/null 2>&1; then
                update-rc.d -f xcatd remove
            fi

            "$xcatd_init_compat" configure --explicit-target
            if "$xcatd_init_compat" can-use-systemctl; then
                systemctl daemon-reload
            fi
            desired_enabled=$("$xcatd_init_state" get enabled)
            transition_origin=$("$xcatd_init_state" get origin)
            if command -v systemctl >/dev/null 2>&1; then
                case "$transition_origin:$desired_enabled" in
                    fresh:yes|legacy:yes) systemctl enable xcatd.service ;;
                    legacy:no|legacy:unregistered) systemctl disable xcatd.service ;;
                esac
            fi
            "$xcatd_init_state" commit-systemd
        else
            "$xcatd_init_state" configure-legacy "$xcatd_transition_context"
        fi

        ln -sf /opt/xcat/sbin/xcatd /usr/sbin/xcatd
    ;;

    abort-upgrade)
        rm -f "$xcatd_context_file" "$xcatd_context_file.tmp."*
    ;;

    abort-remove|abort-deconfigure)
    ;;

    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

#DEBHELPER#

if [ "$1" = configure ]; then
    # Keep explicit context across every fallible postinst step. A retry after
    # this point is a completed configuration and may safely drop it.
    rm -f "$xcatd_context_file" "$xcatd_context_file.tmp."*
fi

exit 0