From: wvdbos@...
Date: 2006-01-26T17:36:54+09:00
Subject: Re: Some troubles with an embedded ruby interpreter

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Hi Matt,

I always load the file with the complete path, but the next should work
without it.

rb_load_file is a routine called from within rb_f_load (the routine calle=
d
by a Ruby-cript if you use 'load "afile.rb"')
But this routine is static, if you look at the source it calls rb_load:

So try calling rb_load (static VALUE rb_load(VALUE fileName,int wrap) )
should be something like:

VALUE f =3D rb_str_new2("cocoabug.rb");
rb_load(f,0);

Hope this helps
Wim van den Bos.


Matt Mower <matt.mower@gmail.com> wrote on 25/01/2006 22:13:21:

> Hi folks,
>
> I posted this message to ruby-talk yesterday but didn't receive any
> responses. I hope you don't mind if I repost it here since I hope it
> is more likely that people here have experience of embedding the ruby
> interpreter and likely things that might be done wrong in the attempt.
>
> I have embedded a Ruby 1.8.4 interpreter (compiled last night) into a
> Cocoa application built using the latest version of the XCode
> development tool on MacOSX. I embedded it by copying the
> libruby-static.a file into the XCode project and marking it to be
> included in the application bundle.
>
> Using the instructions in the 2nd edition of Programming Ruby I have
> managed to get the interpreter working and can execute Ruby statements
> using rb_eval_string(). In particular by using ruby_init_loadpath and
> rb_eval_string() to output $: I can be sure it is loaded the prepared
> ruby and not the system ruby.
>
> However I am having some problems when it comes to executing ruby
> scripts using rb_load_file with a script included in the App bundle. I
> don't think bundling is the issue since a bundle is just a directory
> as far as the underlying OS (and Ruby) are concerned.
>
> If I try to preload $: with the path to the Ruby scripts in my app bund=
le
>
>    NSBundle* mainBundle =3D [NSBundle mainBundle];
>    NSString* scriptPath =3D [mainBundle pathForResource:@"cocoabug"
> ofType:@"rb"];
>    NSString* scriptFolder =3D [scriptPath
stringByDeletingLastPathComponent];
>    NSString* operation =3D @"$: << \"";
>    operation =3D [operation stringByAppendingString:scriptFolder];
>    operation =3D [operation stringByAppendingString:@"\""];
>    rb_eval_string( [operation fileSystemRepresentation] );
>
> This code works and sets the $: correctly (as verified by printing it
> us rb_eval_string( "puts $:" );. However attempts to do:
>
>    rb_load_file( "cocoabug" )
> or
>    rb_load_file( "cocoabug.rb" )
>
> Both raise load errors.
>
>    [Session started at 2006-01-24 21:52:29 +0000.]
>    Load script: cocoabug.rb
>    From Folder:
/Users/matt/Projects/RiC/build/Debug/RiC.app/Contents/Resources
>    Ruby =3D 1.8.4
>    Path =3D /Users/matt/Projects/RiC/build/Debug/RiC.app/Contents/Resou=
rces
>    (eval): No such file or directory -- cocoabug.rb (LoadError)
>
>    RiC has exited with status -1.
>    [Session started at 2006-01-24 21:52:46 +0000.]
>    Load script: cocoabug
>    From Folder:
/Users/matt/Projects/RiC/build/Debug/RiC.app/Contents/Resources
>    Ruby =3D 1.8.4
>    Path =3D /Users/matt/Projects/RiC/build/Debug/RiC.app/Contents/Resou=
rces
>    (eval): No such file or directory -- cocoabug (LoadError)
>
> However attempting the same thing from IRB using:
>
>    $:.clear
>    $: <<
"/Users/matt/Projects/RiC/build/Debug/RiC.app/Contents/Resources"
>    require "cocoabug"
>
> Works fine.
>
> The alternative approach that I tried was to load the file using the
> complete path, i.e.
>
>    rb_load_file( [scriptPath fileSystemRepresentation] );
>
> Does not raise a LoadError, but doesn't appear to work either.
> Whatever I put in cocoabug.rb does not get executed including raising
> Exception.new which should (taking the discussion of rb_protect into
> account) have terminated the whole process.
>
> I'm kinda stumped as to what's wrong but I'm so new to Cocoa/XCode and
> the inner workings of the Ruby interpreter that I'm not sure where to
> look next for the problem.
>
> The source code to my app is available from:
>    http://matt.blogs.it/share/source/main.txt
>
> If anyone could help me out I'd be much obliged.
>
> Regards,
>
> Matt
>
> --
> Matt Mower :: http://matt.blogs.it/
>

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