command line args to guile

command line args to guile

[Rick Taube]

im trying to start guile and have it both eval an expr and load files 
when it starts.
is there a command switch like -c  that will eval an expression but NOT 
exit guile?
when i do guile --help i dont see it. id like to do something like:

% guile -c '(define foo 1)' -l "bar.scm" -l "bif.scm"
guile> foo
1

so that the define happens before the loading.
but the -c  switch exits.


I then tried working with the -e option that takes a function but i 
guess i do not understand
how to notate a lambda expr from the shell:

% guile -e '(lambda args (display args))'
ERROR: Unbound variable: #{\(lambda\ args\ \(display\ args\)\)}#

im not sure how to notate it so that guile reads it as a lambda  expr 
and calls it.
any help would be appreciated!
best,
rick taube




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Re: command line args to guile

[Paul Jarc]

Rick Taube <taube@uiuc.edu> wrote:
> when i do guile --help i dont see it. id like to do something like:
>
> % guile -c '(define foo 1)' -l "bar.scm" -l "bif.scm"
> guile> foo
> 1

You can do this:
$ guile -c '(define foo 1) (load "bar.scm") (load "bif.scm")'
But I don't know how to start the REPL from Scheme code.

If your shell does process substitution, you could avoid -c, so that
guile will start the REPL as usual:
$ guile -l <(echo '(define foo 1)') -l bar.scm -l bif.scm

> I then tried working with the -e option that takes a function but i
> guess i do not understand
> how to notate a lambda expr from the shell:
>
> % guile -e '(lambda args (display args))'
> ERROR: Unbound variable: #{\(lambda\ args\ \(display\ args\)\)}#

-e takes a *name* of an existing function, not an expression that
evaluates to a function.  It's not what you want here.  This works:
$ guile -c '(display (program-arguments)) (newline)'
(guile)

And this will print the arguments, and then start the REPL:
$ guile -e display -- args ...
(guile args ...)guile> 


paul


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Re: command line args to guile

[Rick Taube]

thank you for the nice workaround, unfortunately my shell does not do 
the < substution so i cant use the method you suggest.  Guile could 
really use an additional switch that evals an expr but does not quit!  
I guess ill have to generate a file with my expressions and then -l 
that.



> If your shell does process substitution, you could avoid -c, so that
> guile will start the REPL as usual:
> $ guile -l <(echo '(define foo 1)') -l bar.scm -l bif.scm
>
> id like to do something like:
>
> % guile -c '(define foo 1)' -l "bar.scm" -l "bif.scm"
> guile> foo
> 1

On Friday, Mar 7, 2003, at 12:12 America/Chicago, Paul Jarc wrote:

> Rick Taube <taube@uiuc.edu> wrote:
>> when i do guile --help i dont see it. id like to do something like:
>>
>> % guile -c '(define foo 1)' -l "bar.scm" -l "bif.scm"
>> guile> foo
>> 1
>
> You can do this:
> $ guile -c '(define foo 1) (load "bar.scm") (load "bif.scm")'
> But I don't know how to start the REPL from Scheme code.
>
> If your shell does process substitution, you could avoid -c, so that
> guile will start the REPL as usual:
> $ guile -l <(echo '(define foo 1)') -l bar.scm -l bif.scm
>
>> I then tried working with the -e option that takes a function but i
>> guess i do not understand
>> how to notate a lambda expr from the shell:
>>
>> % guile -e '(lambda args (display args))'
>> ERROR: Unbound variable: #{\(lambda\ args\ \(display\ args\)\)}#
>
> -e takes a *name* of an existing function, not an expression that
> evaluates to a function.  It's not what you want here.  This works:
> $ guile -c '(display (program-arguments)) (newline)'
> (guile)
>
> And this will print the arguments, and then start the REPL:
> $ guile -e display -- args ...
> (guile args ...)guile>
>
>
> paul
>
>
> _______________________________________________
> Guile-user mailing list
> Guile-user@gnu.org
> http://mail.gnu.org/mailman/listinfo/guile-user
>



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Re: command line args to guile

[Marius Vollmer]

prj@po.cwru.edu (Paul Jarc) writes:

> You can do this:
> $ guile -c '(define foo 1) (load "bar.scm") (load "bif.scm")'
> But I don't know how to start the REPL from Scheme code.

Try

  $ guile -c '(begin (define foo 1) (top-repl))'
  guile> foo
  1
  guile>

The function top-repl will run the normal repl.

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