CODEWITHSUNDEEP
rubyrubygems
user2526527
user2526527

Reputation:

New to Ruby and am having trouble with LOAD_PATH

I recently installed Ruby 2.0.0 on OS X 10.8.3 by compiling from source code. I checked the version with

$ ruby --version
ruby 2.0.0p195 (2013-05-14 revision 40734) [x86_64-darwin12.3.0]

And I checked my gem version with

$ gem env
RubyGems Environment:
  - RUBYGEMS VERSION: 2.0.3
  - RUBY VERSION: 1.8.7 (2012-02-08 patchlevel 358) [universal-darwin12.0]
  - INSTALLATION DIRECTORY: /Library/Ruby/Gems/1.8
  - RUBY EXECUTABLE: /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
  - EXECUTABLE DIRECTORY: /usr/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - universal-darwin-12
  - GEM PATHS:
     - /Library/Ruby/Gems/1.8
     - /Users/ehartsuyker/.gem/ruby/1.8
     - /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :backtrace => false
     - :bulk_threshold => 1000
     - :benchmark => false
     - :sources => ["http://rubygems.org/", "http://gemcutter.org"]
  - REMOTE SOURCES:
     - http://rubygems.org/
     - http://gemcutter.org

I noticed that the reported version of Ruby here does not match the version I installed. I don't know if this matters or not.

I have a simple piece of code called encrypy.rb that I'm running. After installing the 'rsa' gem with gem install rsa. 

require 'rubygems'
require 'rsa'

key = RSA::KeyPair.generate(128)
ciphertext = key.encrypt("message")
puts(ciphertext)

When I run it, it gives an error saying it can't find the gem.

$ ruby encrypt.rb -Idirectory '/Library/Ruby/Gems/1.8'
/usr/local/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require': cannot load such file -- rsa (LoadError)
    from /usr/local/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
    from encrypt.rb:2:in `<main>'

So the question is, why isn't Ruby finding the gem despite seeming to know where it is? And how can I fix it?

Upvotes: 2

Views: 7807

Answers (1)

mario
mario

Reputation: 1248

Ruby 1.8.7 is shipped with OS X. It seems that gem is seeing that version instead of your manually installed 2.0.0. As others already suggested, using RVM or rbenv (which one depends on personal preference) makes handling different ruby environments much easier. You can find those tools and descriptions for them in the following places:

RVM: https://rvm.io/

rbenv: https://github.com/sstephenson/rbenv

Upvotes: 1

Related Questions