Using Gems with MacRuby

Question

How do you use gems from a MacRuby .5 application on Snow Leopard? Do I need to specify the gem path? If so, how do I do this?

Best scenario is to package the gems inside the application so the user would not have to install them when the app is distributed.

UPDATE: Rb-appscript does not work with MacRuby. Still not understanding why nokogiri is not though. — Craig Williams, Oct 18 '09 at 00:54

score 12 · Answer 1 · answered Oct 20 '09 at 15:15

12

To use gems in a MacRuby project you need to use:

$ sudo macgem install gem_name

Not all gems are compatible with MacRuby, yet.

answered Oct 20 '09 at 15:15

Craig Williams

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score 5 · Accepted Answer · edited May 08 '11 at 22:00

5

Yehuda Katz gem bundler is a very good option IMHO:

http://github.com/wycats/bundler

Anyway, there are many other options such as creating a vendor/ directory in your app bundle adding each vendor subdir to the ruby library search path in rb_main.rb:

$:.unshift File.join(File.dirname(__FILE__), 'vendor/rest-client/lib')
$:.unshift File.join(File.dirname(__FILE__), 'vendor/crack/lib')
require 'rest-client'
require 'crack'

I'm using the latter approach here:

http://github.com/rubiojr/canasto

edited May 08 '11 at 22:00

erik

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answered Dec 04 '09 at 14:47

rubiojr

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This is nice, but very inconvenient for requiring a gem with many other dependencies. – Overbryd Feb 02 '12 at 16:24

score 4 · Answer 3 · edited Sep 28 '11 at 21:01

4

If you're packaging a MacRuby application you can also add the --gem flag with macruby_deploy under the "Info" tab for your Deployment target.

This puts the specified gem in the site_ruby folder deep within your package.

The arguments I'm passing macruby_deploy for my app are:

--compile --embed --gem sequel --gem sqlite3

edited Sep 28 '11 at 21:01

user229044

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answered May 08 '11 at 20:36

jpoz

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Victor Jalencas · Answer 4 · 2010-05-03T16:44:06.877

2

Gems that are written in C are not usable from MacRuby yet. So, no nokogiri for the time being.

To package the gems, the just released MacRuby 0.5 beta 2 includes the tool macrubyc, which packages the MacRuby framework inside your bundle. They also added support for doing this directly from Xcode in just one step.

edited May 03 '10 at 16:44

answered Nov 17 '09 at 08:17

Victor Jalencas

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score -5 · Answer 5 · answered Oct 17 '09 at 22:01

-5

1st u will have to install the gem:

$ sudo gem install gem_name

then simply require it on your program, u will have to require the 'rubygems' also:

require 'rubygems'
require 'gem_name'

answered Oct 17 '09 at 22:01

Raafat

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Hi Raafat, Thanks for the reply. I have the gems installed and use them everyday in normal scripting. I am requiring rubygems and the gems after that. The error is a load error. These are working: require 'rubygems' require 'bacon' require 'net/http' require 'uri' This is not. require 'nokogiri' require 'appscript' – Craig Williams Oct 18 '09 at 00:31

Using Gems with MacRuby

5 Answers5