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Add the following to the /etc/profile.d/chruby.sh, ~/.bash_profile or
~/.zprofile file:

source %%PREFIX%%/share/chruby/chruby.sh

By default chruby will search for Rubies installed into /opt/rubies/ or
~/.rubies/. For non-standard installation locations, simply set the RUBIES
variable:

RUBIES=(
  /opt/jruby-1.7.0
  $HOME/src/rubinius
)

If you are migrating from another Ruby manager, set `RUBIES` accordingly:

RVM: RUBIES=(~/.rvm/rubies/*)
rbenv: RUBIES=(~/.rbenv/versions/*)
rbfu: RUBIES=('~/.rbfu/rubies/*)

To enable auto-switching of Rubies specified by .ruby-version files:

source %%PREFIX%%/share/chruby/auto.sh

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