title: Why does my vim command-line path differ from my shell PATH?
body: <p>e.g.,</p>
  
  <pre><code>$ echo $PATH
  /usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/bin:~/bin:/usr/local/Cellar/python3/3.2.3/bin
  
  $ vim 
  :! echo $PATH
  /usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:~/bin:/usr/local/Cellar/python3/3.2.3/bin
  </code></pre>
  
  <p>I expected them to be the same.  Why are they different?</p>
  
  <p>If it makes a difference, here is my shell, vim version and OS version:</p>
  
  <pre><code>$ echo $SHELL
  SHELL=/usr/local/bin/zsh
  
  $ /usr/local/bin/zsh --version
  zsh 5.0.0 (x86_64-apple-darwin12.0.0)
  
  $ vim --version
  VIM - Vi IMproved 7.3 (2010 Aug 15, compiled Jun 20 2012 13:16:02)
  Compiled by root@apple.com
  
  
  $ sw_vers
  ProductName:    Mac OS X
  ProductVersion: 10.8.2
  BuildVersion:   12C60
  
  (Mountain Lion)
  </code></pre>