[racket] How to prevent code from running when `required`?

Unfortunately, not. (I think that's part of what Matthias misses.)

Robby

On Fri, Jun 3, 2011 at 8:41 AM, Rodolfo Carvalho <rhcarvalho at gmail.com> wrote:
> Good to know about the -m switch.
> Is there a similar trick to use with DrRacket?
> For now I have one module from where I want to demonstrate some
> functionality running it from DrRacket (with out using the Interactions
> window).
> And I would use this same module as a "library" from another one.
>
> []'s
> Rodolfo Carvalho
>
>
> On Thu, Jun 2, 2011 at 19:51, Robby Findler <robby at eecs.northwestern.edu>
> wrote:
>>
>> You can get close if you use 'racket' to run the file; define a main
>> function that has the code that should only run in standalone and then
>> use the -m flag on the commandline.
>>
>> Robby
>>
>> On Thu, Jun 2, 2011 at 4:45 PM, Matthias Felleisen <matthias at ccs.neu.edu>
>> wrote:
>> >
>> > Not available yet, but thanks for asking: I requested this feature a
>> > month ago on our 'dev' list.
>> >
>> >
>> >
>> >
>> > On Jun 2, 2011, at 5:42 PM, Rodolfo Carvalho wrote:
>> >
>> >> Sorry if I didn't find it somewhere obvious, but I don't know how to do
>> >> the following.
>> >>
>> >> I would like a have a file that when run standalone executes some code,
>> >> and when "required" by another module just provides some definitions.
>> >>
>> >> Example:
>> >>
>> >> ;-------------------------------------------------------
>> >> ; my-lib.rkt
>> >> (provide make-milk-shake)
>> >>
>> >> (define (make-milk-shake flavor)
>> >>   ...)
>> >>
>> >> ; run this only when run standalone
>> >> (magic-thing
>> >>   (make-milk-shake 'banana)
>> >>
>> >>
>> >> ;-------------------------------------------------------
>> >> ; some-other.rkt
>> >> (require "my-lib.rkt")
>> >>
>> >> (make-milk-shake 'strawberry)
>> >> ; only make 1 milk shake of strawberry...
>> >>
>> >>
>> >>
>> >> That is, I am searching for an equivalent idiom for what in Python I'd
>> >> write:
>> >>
>> >> if __name__ == "__main__":
>> >>     do_things()
>> >>
>> >>
>> >>
>> >>
>> >> []'s
>> >>
>> >> Rodolfo Carvalho
>> >> _________________________________________________
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>> >
>> >
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>
>