Rbenv

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Revision as of 14:49, 31 March 2013 by Ichimonji10 (Talk | contribs) (Massive rewrite of the "Installation" section. Added directions for installing both rbenv and ruby-build from the AUR.)

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rbenv (Simple Ruby Version Management) lets you easily switch between multiple versions of Ruby. It's simple, unobtrusive, and follows the UNIX tradition of single-purpose tools that do one thing well.

Another tool to be used for the same purpose is rvm.

Comparison with RVM

From the wiki:

rbenv does...

  • Let you change the global Ruby version on a per-user basis.
  • Provide support for per-project Ruby versions.
  • Allow you to override the Ruby version with an environment variable.

In contrast with rvm, rbenv does not...

  • Need to be loaded into your shell. Instead, rbenv's shim approach works by adding a directory to your $PATH.
  • Override shell commands like cd. That's dangerous and error-prone.
  • Have a configuration file. There's nothing to configure except which version of Ruby you want to use.
  • Install Ruby. You can build and install Ruby yourself, or use ruby-build to automate the process.
  • Manage gemsets. Bundler is a better way to manage application dependencies. If you have projects that are not yet using Bundler you can install the rbenv-gemset plugin.
  • Require changes to Ruby libraries for compatibility. The simplicity of rbenv means as long as it's in your $PATH, nothing else needs to know about it.
  • Prompt you with warnings when you switch to a project. Instead of executing arbitrary code, rbenv reads just the version name from each project. There's nothing to "trust."

Installation

You can install rbenvAUR from the AUR.

Plugins

rbenv can be extended via a plugin system, and the rbenv wiki includes a list of useful plugins. The ruby-build plugin is especially useful, as it allows you to install Ruby versions with the rbenv install command. You can install ruby-buildAUR from the AUR.

External links