postinst is in lyskom-elisp-client 0.48+cvs20100715-3.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | #!/bin/sh
set -e
case "$1" in
    configure)
        # Load debconf library.
        . /usr/share/debconf/confmodule
        db_get lyskom-elisp-client/server-list-query
        if [ "$RET" = "true" ]; then
            foo=english
        else
            foo=full
        fi
        ln -sf ${foo}serverlist.el /usr/share/emacs/site-lisp/lyskom-elisp-client/serverlist.el
        /usr/lib/emacsen-common/emacs-package-install lyskom-elisp-client
        ;;
    abort-upgrade|abort-remove|abort-deconfigure)
        exit 0
        ;;
    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 0
        ;;
esac
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