#!/bin/sh
# This script can be called in the following ways:
#
# After the package was installed:
#	<postinst> configure <old-version>
#
# After the package was triggered:
#	<postinst> triggered <trigger-name>…
#
#
# If prerm fails during upgrade or fails on failed upgrade:
#	<old-postinst> abort-upgrade <new-version>
#
# If prerm fails during removal:
#	<old-postinst> abort-remove
#
# If prerm fails during deconfiguration of a package:
#	<postinst> abort-deconfigure in-favour <new-package> <version>
#		   removing <old-package> <version>
#
# If prerm fails during replacement due to conflict:
#	<postinst> abort-remove in-favour <new-package> <version>

set -e

# Create the database files if they don't already exist
create_database() {
    admindir=${DPKG_ADMINDIR:-/var/lib/dpkg}

    for file in diversions statoverride status; do
	if [ ! -f "$admindir/$file" ]; then
	    touch "$admindir/$file"
	fi
    done
}


# Move the info directory from /usr/info to /usr/share/info
move_info_directory() {
    if [ -d /usr/info ] && [ ! -L /usr/info ] \
	&& [ -f /usr/info/dir ] && [ ! -L /usr/info/dir ]
    then
	echo "Moving /usr/info/dir to /usr/share/info/dir ..."
	mv /usr/info/dir /usr/share/info/dir
	if [ -f /usr/info/dir.old ]; then
	    mv /usr/info/dir.old /usr/share/info/dir.old
	fi
    fi
}


# Remove the /usr/info symlinks we used to generate
remove_info_symlink() {
    if [ -L /usr/info ]; then
	echo "Removing /usr/info symlink ..."
	rm /usr/info
    elif [ -L /usr/info/dir ]; then
	echo "Removing /usr/info/dir symlink ..."
	rm /usr/info/dir
    fi
}

# Create log file and set default permissions if possible
create_logfile() {
    logfile=/var/log/dpkg.log
    touch $logfile
    chmod 644 $logfile
    chown root:root $logfile 2>/dev/null || chown 0:0 $logfile
}


case "$1" in
    configure)
	create_database
	create_logfile

	move_info_directory
	remove_info_symlink
	;;

    abort-upgrade|abort-deconfigure|abort-remove)
	;;

    *)
	echo "$0 called with unknown argument '$1'" 1>&2
	exit 1
	;;
esac


exit 0