I just pushed the second alpha release of Rip. What’s new?

• C extensions are now built automatically during installation.
• Rip can now uninstall itself using sudo rip uninstall rip.
• Added ruby command for running Ruby within a specific ripenv: rip ruby some_ripenv file.rb
• Add RUBYBIN env support to rip ruby: RUBYBIN=/path/to/jruby rip ruby cheat_env cheat.rb
• Rip also respects the RAKEBIN and GEMBIN env variables.
• Improved zshell support.
• Support for the fish shell.
• Added rip setup command.
• Can pass --bindir, --libdir and/or --ripdir as to setup.
• More friendly and informative rip check.
• Rip now installs into /usr by default on OS X (not /usr/local)
• Rogue plugins can no longer break Rip.
• Packages may now respond to hooks in the installation process.
• Added upgrade to setup.rb.

And, of course, bug fixes. Thanks to everyone who contributed!