Re: [MIT-Scheme-devel] Reading command-line arguments from MIT-Scheme.

[giorgio xyzb]

Hello again,

I managed to find a solution, which seems to work.

I have created a file init.scm with the following content:

  (define command-line-args '())

  (define parse-argument-list
    (lambda (arg-list)
      (set! command-line-args
        (if (null? arg-list)
            (list)
            (cdr arg-list)))))

  (set-command-line-parser! "args" parse-argument-list)

In this way, when the command line option --args is found, the function
parse-argument-list is invoked.

I have loaded this file into the mit-scheme interpreter and saved a world image
(init.com) using the procedure disk.save.

I have then written a shell script (bash) that invokes my main Scheme script as 
follows:

  mit-scheme --band "init.com" --interactive --batch-mode --args $* < 
myscript.scm

Finally, in my main script I can access the command line arguments through the 
variable

  command-line-args

I hope this is the standard / correct way to do this.

Best regards
Giorgio
>
> Hello,
>
> a few days ago I have installed MIT Scheme (MIT/GNU Scheme running under 
> Ubuntu 
> Linux 10.04)
> and I have started experimenting with it.
>
> One thing I would like to do is start a Scheme application from the 
> command-line and pass it some
> parameters, like so:
> 
>  $ mit-scheme myapplication.scm par1 par2 par3
>
> I have searched the documentation at http://www.gnu.org/software/mit-scheme/ 
> but I could not find
> any information on this topic.
>
> I wanted to ask if it is possible to access command-line parameters from 
> MIT-Scheme and how.
>
> Thank you in advance and best regards
> Giorgio
>