This rbenv plugin allows easier switching between Ruby versions without having to keep patchlevels in mind.

Pro tip: Alias rbenv to rvm to ease transition. The --global option is aliased to --default exactly for that purpose.

Usage examples

Switch current shell to latest stable JRuby:

rbenv use jruby

Switch to whatever would be default (global or local):

rbenv use default

Make latest stable 1.9.3 global default and switch to using it:

rbenv use 1.9.3 --global

Make whatever the current Ruby is the global default:

rbenv use current --global

Make whatever the current Ruby is the local default:

rbenv use current --local

Make whatever the local Ruby is the global default:

rbenv use local --global

Use 2.0 development version:

rbenv use 2.0

Use rbx development version:

rbenv use rbx

Installation

Run these commands:

mkdir -p "$(rbenv root)/plugins"
git clone https://github.com/rkh/rbenv-whatis.git "$(rbenv root)/plugins/rbenv-whatis"
git clone https://github.com/rkh/rbenv-use.git "$(rbenv root)/plugins/rbenv-use"

Skip the first git clone if you already installed rbenv-whatis.