From: oren <orengolan@...>
Date: 2009-08-16T06:20:05+09:00
Subject: Re: ruby 1.9 side by side with 1.8

I found a solution:
sudo ~/.ruby_versions/ruby-1.9.1-p129/bin/gem uninstall <gem>

but I am looking for a way to simply use: 'sudo gem', so i can use my
'rake gems:insall'
I found this gem - http://github.com/lsegal/gem-sane-binary/tree/master
but not sure it's the right direction.

I started following the steps:
sudo mv /usr/bin/ruby /usr/bin/ruby18
sudo mv /usr/bin/irb /usr/bin/irb18
sudo mv /usr/bin/gem /usr/bin/gem18

but i am not sure what to do in the next step:
"Then create your ruby/irb/gem symlinks to point to whichever Ruby
install you're using:
ln -fs /usr/local/bin/ruby19 /usr/local/bin/ruby"

btw, here is the output of gem env:
RubyGems Environment:
  - RUBYGEMS VERSION: 1.3.1
  - RUBY VERSION: 1.9.1 (2009-05-12 patchlevel 129) [i686-linux]
  - INSTALLATION DIRECTORY: /home/oren/.gem/ruby/1.9
  - RUBY EXECUTABLE: /home/oren/.ruby_versions/ruby-1.9.1-p129/bin/
ruby
  - EXECUTABLE DIRECTORY: /home/oren/.gem/ruby/1.9/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86-linux
  - GEM PATHS:
     - /home/oren/.gem/ruby/1.9
     - /home/oren/.gem/ruby/1.9.1
     - /home/oren/.ruby_versions/ruby-1.9.1-p129/lib/ruby/gems/1.9.1
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
     - :sources => ["http://gems.rubyforge.org/", "http://
gems.github.com"]
  - REMOTE SOURCES:
     - http://gems.rubyforge.org/
     - http://gems.github.com

and when i switch back to 1.8 with use_ruby_187:
RubyGems Environment:
  - RUBYGEMS VERSION: 1.3.3
  - RUBY VERSION: 1.8.7 (2008-08-11 patchlevel 72) [i486-linux]
  - INSTALLATION DIRECTORY: /home/oren/.gem/ruby/1.8
  - RUBY EXECUTABLE: /usr/bin/ruby1.8
  - EXECUTABLE DIRECTORY: /home/oren/.gem/ruby/1.8/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86-linux
  - GEM PATHS:
     - /home/oren/.gem/ruby/1.8
     - /usr/lib/ruby/gems/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"]
  - REMOTE SOURCES:
     - http://gems.rubyforge.org/
     - http://gems.github.com