added mac support to command-not-found module

modules/command-not-found/README.md

@@ -4,12 +4,23 @@ Command-Not-Found
 Displays installation information for not found commands by loading the
 [command-not-found][1] tool on Debian-based and Arch Linux-based distributions.
 
+For users of Mac OS X, if homebrew and [homebrew-command-not-found][2] are properly installed, this module will provide similar information as is presented to Linux users.
+
+For example... (on OSX with Homebrew)
+
+```bash
+$ when
+The program 'when' is currently not installed. You can install it by typing:
+  brew install when
+```
+  
 Authors
 -------
 
-*The authors of this module should be contacted via the [issue tracker][2].*
+*The authors of this module should be contacted via the [issue tracker][3].*
 
   - [Joseph Booker](https://github.com/sargas)
 
 [1]: https://code.launchpad.net/command-not-found
-[2]: https://github.com/sorin-ionescu/prezto/issues
+[2]: https://github.com/bfontaine/homebrew-command-not-found
+[3]: https://github.com/sorin-ionescu/prezto/issues

modules/command-not-found/init.zsh

@@ -3,6 +3,7 @@
 #
 # Authors:
 #   Joseph Jon Booker <joe@neoturbine.net>
+#   Alex Gray <alex@mrgray.com> (Mac Support)
 #
 
 # Load command-not-found on Debian-based distributions.
@@ -11,6 +12,9 @@ if [[ -s '/etc/zsh_command_not_found' ]]; then
 # Load command-not-found on Arch Linux-based distributions.
 elif [[ -s '/usr/share/doc/pkgfile/command-not-found.zsh' ]]; then
   source '/usr/share/doc/pkgfile/command-not-found.zsh'
+# Load command-not-found on Mac OS X with https://github.com/bfontaine/homebrew-command-not-found installed
+elif [[ $(type -f brew) ]] && [[ -s ${HANDLER=$(brew --prefix)/Library/Taps/bfontaine/homebrew-command-not-found/handler.sh} ]]; then
+  source "${HANDLER}"
 # Return if requirements are not found.
 else
   return 1