#! /bin/sh
#
# Update link-library symlinks after a Python default runtime change

set -e

die() {
    echo "$@" >&2
    exit 1
}

update_linklibs() {
    py=$1
    suf=$2

    cd /usr/lib
    for base in libboost_python; do
	target=${base}-${py}.${suf}
	link=${base}.${suf} 
	if test -e $target ; then
	    ln -s -f $target $link
	fi
    done
}

remove_linklibs() {
    suf=$1

    cd /usr/lib
    for thread in "" -mt; do
	rm -f libboost_python${thread}.${suf}
    done
}

rtupdate() {
    case "$1" in
	python2.4)  py=py24 ;;
	python2.5)  py=py25 ;;
	python2.6)  py=py26 ;;
	python2.7)  py=py27 ;;
	*)          remove ; return ;;
    esac

    update_linklibs $py a
    update_linklibs $py so
}

remove() {
    remove_linklibs a
    remove_linklibs so
}


action="$1"
shift

case "$action" in
    pre-rtupdate)  ;;
    post-rtupdate) ;;
    rtupdate)      rtupdate $2 ;;
    remove)        remove ;;
    *)             die "$0 called with unknown argument '$action'" ;;
esac