Why can't Ruby find Rake?

10,052

It looks like rake is trying to run from /usr/bin/rake, the system version of Ruby, while you have a custom install of Ruby in /usr/local.

  1. Make sure you have the rake gem installed for the Ruby installation you're using
  2. Make sure the rake command is in a directory on your $PATH.

which gem should return the rubygems install from /usr/local/bin. If not, that's the first problem to solve. Then you want to make sure you have the rake gem in your /usr/local Ruby installation:

gem list | grep rake

should tell you if the gem is installed. If not, run gem install rake.

At this point, which rake should point to something in your /usr/local path. If it doesn't use find /usr/local | grep rake to figure out where your Ruby install is keeping gem executables and add that directory to your loadpath.

As a side note, if you're using your own install of Ruby, you might find rvm or rbenv helpful for managing installs and gems.

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10,052
jayfallon
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jayfallon

Updated on July 18, 2022

Comments

  • jayfallon
    jayfallon over 1 year

    I was using the Rails 3 beta gem yesterday but went back to 2.3.8, and, after cleaning the system gems, I was trying to run a simple Rake task and got this:

    Peleliu:haml jayfallon$ sudo rake install
    /Library/Ruby/Site/1.8/rubygems.rb:779:in `report_activate_error': Could not find RubyGem rake (>= 0) (Gem::LoadError)
     from /Library/Ruby/Site/1.8/rubygems.rb:214:in `activate'
     from /Library/Ruby/Site/1.8/rubygems.rb:1082:in `gem'
     from /usr/bin/rake:18
    

    I am not sure if it has to do with my path being borked or not.

    RubyGems Environment:
      - RUBYGEMS VERSION: 1.3.7
    
      - RUBY VERSION: 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin10.0.0]
      - INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/1.8
      - RUBY EXECUTABLE: /usr/local/bin/ruby
      - EXECUTABLE DIRECTORY: /usr/local/bin
      - RUBYGEMS PLATFORMS:
        - ruby
        - x86-darwin-10
      - GEM PATHS:
         - /usr/local/lib/ruby/gems/1.8
         - /Users/jayfallon/.gem/ruby/1.8
      - GEM CONFIGURATION:
         - :update_sources => true
         - :verbose => true
         - :benchmark => false
         - :backtrace => false
         - :bulk_threshold => 1000
         - :sources => ["http://gems.rubyforge.org/", "http://gems.github.com", "http://gems.github.com", "http://gems.github.com", "http://gems.github.com", "http://gems.github.com", "http://gems.github.com", "http://gems.github.com", "http://gems.github.com", "http://gems.github.com", "http://gemcutter.org/"]
      - REMOTE SOURCES:
    
         - http://gemcutter.org/