homebrew not working on OSX

Question

Getting this error when i run the brew command on terminal. Need help resolving.

 /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- utils/popen (LoadError)
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/local/Library/Homebrew/utils.rb:6:in `<top (required)>'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/local/Library/Homebrew/global.rb:9:in `<top (required)>'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/local/Library/brew.rb:16:in `<main>'

here are my env gem settings:

• RUBYGEMS VERSION: 2.0.14
• RUBY VERSION: 2.0.0 (2014-02-24 patchlevel 451) [universal.x86_64-darwin13]
• INSTALLATION DIRECTORY: /Library/Ruby/Gems/2.0.0
• RUBY EXECUTABLE: /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby
• EXECUTABLE DIRECTORY: /usr/bin
• RUBYGEMS PLATFORMS:
  • ruby
  • universal-darwin-13
• GEM PATHS:
  • /Library/Ruby/Gems/2.0.0
  • /Users/ronaldkwan/.gem/ruby/2.0.0
  • /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0
• GEM CONFIGURATION:
  • :update_sources => true
  • :verbose => true
  • :backtrace => false
  • :bulk_threshold => 1000

Answer 1

First, open terminal and cd /usr/local/, and git status to see if Homebrew is clean.

if dirty, git reset --hard && git clean -df

then brew doctor, brew update

If still broken, try this in your terminal:

$ sudo rm /System/Library/Frameworks/Ruby.framework/Versions/Current
$ sudo ln -s /System/Library/Frameworks/Ruby.framework/Versions/1.8 /System/Library/Frameworks/Ruby.framework/Versions/Current

This will force Homebrew to use ruby 1.8 from system