As some already figured it out, you need to create an application bundle (.app) around your MacRuby script (with an Info.plist file, and so on), then run it from the command-line.

macrubyc can be used to compile your script into a binary executable, but you still need to wrap it inside a .app bundle in order to get your app running as a regular Cocoa app.

On Oct 16, 2010, at 11:04 AM, corey johnson wrote:

I'm trying to figure out how to launch a macruby app (with a cocoa UI)
from the command line without relying on xcode or xcodebuild. The
problem i'm running into is that the NSBundle.mainBundle is not being
set when I run the app from the command line. I've tried using this:

macruby -C. myApp.rb

But that doesn't set the bundle to the current directory and I get this error:

No Info.plist file in application bundle or no NSPrincipalClass in
the Info.plist file, exiting

Is it possible to run a macruby app from the command line? Should I be
using macrubyc to do this?

Thanks,
Corey
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