Clean the $PATH then return it to normal. Make homebrew more harmonious with Fink et al.

gistfile1.diff

diff --git a/bin/brew b/bin/brew
index 4ec64f0..79a1fb4 100755
--- a/bin/brew
+++ b/bin/brew
@@ -11,7 +11,11 @@ require 'pathname'
 HOMEBREW_LIBRARY_PATH = (Pathname.new(__FILE__).realpath.dirname.parent+"Library/Homebrew").to_s
 $:.unshift(HOMEBREW_LIBRARY_PATH)
 require 'global'
-
+def path_clean
+  oldpath = ENV['PATH']
+  ENV['PATH'] = '/usr/bin:/bin:/sbin:/usr/sbin:/opt/X11/bin:/usr/X11/bin:/usr/X11R6/bin:/usr/local/bin:/usr/local/sbin/' + ':' + HOMEBREW_PREFIX + '/bin:' + HOMEBREW_PREFIX + '/share/npm/bin'
+  oldpath
+end
 case ARGV.first
 when '-h', '--help', '--usage', '-?', 'help', nil
   puts ARGV.usage
@@ -72,7 +76,7 @@ MacPorts or Fink? #{macports_or_fink_installed?}
 X11 installed? #{x11_installed?}
 EOS
 end
-
+oldpath = path_clean
 begin
   require 'brew.h'
 
@@ -403,3 +407,4 @@ rescue Exception => e
   puts e.backtrace
   exit 1
 end
+ENV['PATH'] = oldpath