PREIN

/bin/sh

if [ $1 -gt 1 ]; then
    # Upgrade => deregister old extension
    unopkg remove --shared org.openoffice.da.writer2xhtml.oxt || :
fi

PREUN

/bin/sh

if [ $1 -eq 0 ]; then
    # not upgrading => deregister
    unopkg remove --shared org.openoffice.da.writer2xhtml.oxt || :
fi

POSTIN

/bin/sh

    # register extension
    unopkg add --shared --force --link /usr/share/openoffice.org/extensions/writer2xhtml.oxt || :