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copied!<p>I see two things:</p> <p>Your <code>which ruby</code> says the default is <code>/usr/bin/ruby</code>, but your Autotest is calling <code>/usr/local/bin/ruby</code>.</p> <blockquote> <p>sh: /usr/local/bin/unit_diff: /usr/local/bin/ruby: bad interpreter: No such file or directory</p> </blockquote> <p>Also, your path is not organized well because you have duplicated entries. I split it on ':' then sorted it to look for duplicates:</p> <pre><code>/bin /Library/Frameworks/Python.framework/Versions/Current/bin /opt/local/bin # <-- /opt/local/bin # <-- /opt/local/sbin /sbin /Users/ethan/bin /usr/bin /usr/local/bin # <-- /usr/local/bin # <-- /usr/local/git/bin /usr/local/mysql/bin /usr/local/oracle/instantclient_10_2 /usr/local/pgsql/bin /usr/sbin </code></pre> <p>Notice that you have duplicated <code>/opt/local/bin</code> and <code>/usr/local/bin</code> directories. Those should appear ahead of the default <code>/usr/bin</code> directory in order for your "personally" installed apps to be located first, so you should do some housekeeping. Once you have done that close your terminal session(s). Open a new session and try rerunning your test and see if anything has changed/improved.</p> <p>The path organization is part of the problem and explains why <code>which ruby</code> points to the system Ruby. I suspect another part of this puzzle is that you are using <code>#!/usr/local/bin/ruby</code> as the "bang slash" in your scripts, or explicitly pointing to that Ruby when you call things on the command-line. That will confuse tests no end. In my scripts I use this to invoke Ruby:</p> <pre><code>#!/usr/bin/env ruby </code></pre> <p>which works nicely because it uses whatever Ruby is defined first in my path, and with this next part...</p> <p>I'm a big proponent for using <a href="http://rvm.beginrescueend.com" rel="nofollow">RVM</a> to manage Ruby installations on Mac OS and Linux. It makes it so you don't have to install anything in your default <code>/usr/bin</code> ruby or even bother with adding one in <code>/usr/local/bin</code>. RVM puts everything in <code>~/.rvm</code> and makes it really easy to install/manage/remove Ruby versions along with their associated gems, or even blow it all away by deleting that directory. <a href="http://rvm.beginrescueend.com/rvm/install/" rel="nofollow">Installing RVM</a> and <a href="http://rvm.beginrescueend.com/gemsets/" rel="nofollow">Gemsets</a> are good starting places if you want to give it a try. </p>

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