Processing 1.0 - Processing Discourse - ruby-processing and custom require

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ruby-processing and custom require (Read 4370 times)

mart

ruby-processing and custom require
May 26^th, 2009, 5:03am

Hi.
I recently started using ruby-processing and I have two questions:

1. How can I require and use another of my gems in a ruby-processing context? When I use 'rp5 run <file>' none of my installed gems are found although I require 'rubygems first.

2. Is it possible to run a ruby-processing class (that inhertis from app) with the vanilla ruby binary?

Grateful for any help /Mart

jashkenas

Re: ruby-processing and custom require
Reply #1 - May 26^th, 2009, 6:11am

Hi Mart.

Ruby-Processing is using the JRuby interpreter to run, and not your standard Ruby interpreter. This means that you can't run it through vanilla MRI, as it needs to run in Java to have access to Processing. This also means that you can't access your gems as usual. If you want to use a gem, the easiest thing to do is unpack it into your sketch, much like you would when you vendor a gem into a Rails project. Then you can require or load it.

Note that this will only work with pure-ruby gems. Gems that depend on native C extensions can't be run directly by JRuby. The JRuby guys are working on FFI for gems to help make Ruby gems more compatible across different Ruby implementations.

mart YaBB Newbies Offline Posts: 5	Re: ruby-processing and custom require Reply #2 - May 30^th, 2009, 2:31pm Gotcha, many thank's! Also thank you for a wonderful work. Ruby-processing is great!

pla

Re: ruby-processing and custom require
Reply #3 - Aug 5^th, 2009, 2:00pm

Hello guys,
I'm using YAML in my sketch and I get following error when exporting as an applet or app:
/var/lib/gems/1.8/gems/ruby-processing-1.0.8/lib/ruby-processing/exporters/base_
exporter.rb:97:in `extract_real_requires': (eval):1:in `extract_real_requires': uninitialized constant Processing::BaseExporter::YAML (NameError)

Then I tried to requre in base_exporter.rb, but that didn't work either..
Can you help?

« Last Edit: Aug 6^th, 2009, 11:59am by pla »

jashkenas

Re: ruby-processing and custom require
Reply #4 - Aug 14^th, 2009, 8:16pm

You've stumbled across one of the wartier parts -- Ruby-Processing trying to figure out which require and load statements are references to actual files that need to be included in the exported sketch. YAML, being part of the standard library, is clearly not one of those, but perhaps you're doing something fancy on that line that's breaking the detection. If you don't mind, please paste the line(s) in question. Otherwise, doing a plain old "require 'yaml'" on a line all by itself should pose no problem.

alec resnick

Re: ruby-processing and custom require
Reply #5 - May 30^th, 2010, 5:19am

jashkenas wrote on May 26^th, 2009, 6:11am:

Note that this will only work with pure-ruby gems. Gems that depend on native C extensions can't be run directly by JRuby. The JRuby guys are working on FFI for gems to help make Ruby gems more compatible across different Ruby implementations.

Do you know when this will change/where I can watch for updates

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