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 Forum index » DIY Hardware and Software » ChucK programming language
Command line arguments to the VM
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Antimon



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PostPosted: Thu May 21, 2009 2:39 am    Post subject:  Command line arguments to the VM Reply with quote  Mark this post and the followings unread
I feel kind of stupid here, but if you don't ask you'll never know...

A lot of the examples (e.g. gomidi.ck) have lines like this:

Code:
if( me.args() ) me.arg(0) => Std.atoi => device;


which I interpret as reading an argument that the user provides when running the VM. Thinking I should make a hack a bit more user friendly before submitting to the monome forum, I wanted the user to be able to add such an argument when running my chuck program. And sure, I can add a line like the one above, but I have no idea how I am supposed to set this argument when running the chuck program!

I have browsed the ChucK docs up and down, and searched around a bit here, but I'm damned if I can find example where someone runs chuck with application arguments. Is this only supported in the MiniAudicle? Is there a text here right under my nose that says how it works?

and, just to be clear, this doesn't work:

Code:
chuck test.ck hej


this will output:

Code:
[hej]: no such file or directory


because chuck assumes that hej is a chuck source file that I want to run.

I'm running on OSX, can that be the issue?

/Stefan
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Kassen
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PostPosted: Thu May 21, 2009 3:06 am    Post subject: Re: Command line arguments to the VM Reply with quote  Mark this post and the followings unread
Antimon wrote:
I'm wise enough to ask questions; if you don't ask you'll never know...


Fixed a typo there. :¬p

Quote:

I have browsed the ChucK docs up and down, and searched around a bit here, but I'm damned if I can find example where someone runs chuck with application arguments.


Oh, yes, that's underdocumented and should be in the VM commandline options reference, I feel. Right now I think it might only be documented in the VERSIONS text and maybe a example. Let me quote from VERSIONS;

Quote:

1.2.0.8
- (added) command line argument support
e.g. %> chuck foo.ck:1:hello bar:2.5:"with space"
also works with OTF commands
e.g. %> chuck + foo:1:yo
also works with Machine.add( ... )
e.g. // code
Machine.add( "foo:1:2:yo" );
(see examples/basic/args.ck for accessing from code)


Does that clarify?
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Antimon



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PostPosted: Thu May 21, 2009 3:27 am    Post subject: Reply with quote  Mark this post and the followings unread
He he Smile Perfect, thanks! That syntax makes sense, so it can be used with Machine.add() also.

I think this info would fit in the VM options page, or in the "Running ChucK" section in the language spec.

/Stefan
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