From: Phrogz <gavin@...>
Date: 2007-01-22T00:05:08+09:00
Subject: Re: uninstalling the mac tiger version of ruby

libsfan01 wrote:
> My reason for wanting to uninstall is that ive tried to install the
> latest version but terminal is still telling me that the version is
> 1.8.2 not 1.8.5 that i downloaded, so it must have gotten messed up
> somewhere right?

Probably your PATH environment variable is set to use the
tiger-installed version, instead of your new version. Observe:

   slim:~ gavinkistner$ /usr/bin/ruby -v
   ruby 1.8.2 (2004-12-25) [powerpc-darwin8.0]

   slim:~ gavinkistner$ /usr/local/bin/ruby -v
   ruby 1.8.5 (2006-08-25) [powerpc-darwin8.7.0]

   slim:~ gavinkistner$ env
   [...snip...]
   PATH=.:/usr/local/bin:/bin:/sbin:/usr/bin:/usr/sbin
   [...snip...]

   slim:~ gavinkistner$ which ruby
   /usr/local/bin/ruby

In other words, Apple's build lives in /usr/bin, my latest stable build
lives in /usr/local/bin. If I just type "ruby", the PATH environment
variable chooses which directories to look in, and the order to look.
IIRC had to change my PATH to put my local bin directory before
/usr/bin, because I always wanted programs that I had built and
installed to supercede existing installs.

If you really want, you can go in as root and rename /usr/bin/ruby (and
irb and rdoc and others) to have a different name, like ruby182. Or you
could delete them, and hope that nothing relied on them. But I'd just
go with the PATH solution.