clivers

https://github.com/maoueh/clivers

This gem has been built to ease usage of multiple versions of command line tools like Ruby, Python, Vagrant, etc. It is not installer, it's a tool to switch between already installed versions of a software. By using a configuration file and some conventions, the tool will be able to locate your program and switch between multiple version of it be tweaking your environment variables, usually simply the PATH one.