#!/bin/sh
# postinst script for qemu-guest-agent
#
# see: dh_installdeb(1)

set -e

# 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 https://www.debian.org/doc/debian-policy/ or
# the debian-policy package


case "$1" in
    configure)
    ;;

    abort-upgrade|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#

# Normal mv_conffile alone would fail due to the new path being a DIR in the old package version (LP: 1820291)
case "$1" in
    configure)
        # From /usr/bin/dpkg-maintscript-helper modified to be able to cope with this edge case
        if [ -n "$2" ] && dpkg --compare-versions -- "$2" le-nl "1:3.1+dfsg-7~"; then
            TMPCONFFILE="/etc/qemu/fsfreeze-hook.old"
            NEWCONFFILE="/etc/qemu/fsfreeze-hook"
            ORIGCONFFILE="/etc/qemu/fsfreeze-hook/fsfreeze-hook"
            rm -f "$TMPCONFFILE.dpkg-remove"
            if [ -e "$TMPCONFFILE" ]; then
                echo "Preserving user changes to $NEWCONFFILE (renamed from $ORIGCONFFILE)..."
                if [ -e "$NEWCONFFILE" ]; then
                    mv -f "$NEWCONFFILE" "$NEWCONFFILE.dpkg-new"
                fi
                mv -f "$TMPCONFFILE" "$NEWCONFFILE"
            fi
        fi
        ;;
esac

exit 0