Re: Warning when defining variables on the command line

[Aaron Hill]

On 2019-11-19 3:37 am, Matt Wallis wrote:
> I want to pass the subtitle into lilypond on the command line because
> it is also required by other programmes (e.g. sox needs the subtitle
> to create a tag for the mp3 it creates).
> [ . . . ]
> But I now get the warning:
>
>     Parsing...WARNING: #f: imported module (guile-user) overrides core
> binding `%module-public-interface'
>
> Should I be concerned? Is it safe to ignore? Can I suppress this 
> warning?

With a little more work, you can peek into the guile-user module and 
grab out what you need without importing the entire module into the 
current environment:

%%%%
\version "2.19.83"

#(define (guile-user-lookup sym def)
  (let ((mod (resolve-module '(guile-user))))
    (if (module-defined? mod sym) (eval sym mod) def)))

#(format #t "\nHello, ~a!" (guile-user-lookup 'hello "..."))
%%%%

====
$ wsl lilypond guile-user.ly
GNU LilyPond 2.19.83
Processing `guile-user.ly'
Parsing...
Hello, ...!
Success: compilation successfully completed

$ wsl lilypond -e '(define hello "World")' guile-user.ly
GNU LilyPond 2.19.83
Processing `guile-user.ly'
Parsing...
Hello, World!
Success: compilation successfully completed
====


-- Aaron Hill