is there a nicer way to set the Tcl module path?

I like using Tcl modules for my apps.
I also often use soft links so that for example, an app in, say,
~/app/tcl/myapp
will be soft linked to a dir in my $PATH e.g.,
cd ~/bin ; ln -s ~/app/tcl/myapp/myapp.tcl

This means that [info script] will return different paths depending
on whether the app is run in its own dir, ./myapp.tcl or via the
soft link.

So I begin my apps like this:

#!/usr/bin/env tclsh9

if {![catch {file readlink [info script]} name]} {
    const APPPATH [file dirname $name]
} else {
    const APPPATH [file normalize [file dirname [info script]]]
}
tcl::tm::path add $APPPATH

package require app

app::main

Is there a nicer (and more compact) way to set APPPATH?