#!/bin/sh

set -e

syssite=/usr/lib/@PVER@/site-packages
oldsite=/usr/lib/@PVER@/old-site-packages
localsite=/usr/local/lib/@PVER@/dist-packages
syslink=../../${localsite#/usr/*}

move_site_packages()
{
    if [ ! -d $localsite ]; then
	if ! mkdir -p $localsite; then
	    echo >&2 "unable to create $localsite. Skip moving $syssite contents to new location"
	    exit 1
	fi
    fi

    if [ -h $syssite ]; then
	:
    elif [ -d $syssite ]; then
	for i in $(find $syssite -mindepth 1 -maxdepth 1 -printf '%P\n'); do
	    echo "Moving $syssite/$i to new location:"
	    if [ ! -e $localsite/$i ]; then
		echo "  --> $localsite/$i"
		mv $syssite/$i $localsite/
	    elif [ ! -e $oldsite/$i ]; then
		echo "  --> $oldsite/$i (already exist in $localsite/"
		mv $syssite/$i $oldsite/
	    else
		echo "  already exists in $localsite/ and $oldsite/"
		echo "  please proceed manually"
		exit 1
	    fi
	done
	echo "removing $syssite"
	rmdir $syssite
	#echo "symlinking $syssite to $localsite"
	#ln -s $syslink $syssite
    else
	:
	#ln -sf $syslink $syssite
    fi
}

case "$1" in
    install)
	# there never was a python2.6 package using site-packages.
        #if [ -n "$2" ] && dpkg --compare-versions "$2" lt '2.6.1-0'; then
	#    move_site_packages
	#fi
	if [ -z "$2" ] && [ -d $syssite ] && [ ! -h $syssite ]; then
	    echo "new installation of @PVER@-minimal; $syssite is a directory"
	    echo "which is expected a symlink to $localsite."
	    echo "please find the package shipping files in $syssite and"
	    echo "file a bug report to ship these in /usr/lib/@PVER@/dist-packages instead"
	    echo "aborting installation of @PVER@-minimal"
	    exit 1
	fi

	# remember newly installed runtime
	mkdir -p /var/lib/python
	touch /var/lib/python/@PVER@_installed
    ;;
    upgrade)
	# there never was a python2.6 package using site-packages.
        #if [ -n "$2" ] && dpkg --compare-versions "$2" lt '2.6.1-0'; then
	#    move_site_packages
	#fi
	:
    ;;

    abort-upgrade)
    ;;

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

#DEBHELPER#

exit 0