# Sherpa

Watch files in a directory for changes/updates.

I know that this might not be the best way to do this but it seems to work for right now so I am putting it out there. Simply create a file to execute in the terminal (example below) and point it at the directory you would like to watch. When a file is changed the callback you pass in will execute and you can do whatever you want with the change.

I have started using this in conjunction with Grunt.js so I don't have to grunt with each change to my files while developing.

## Basic Usage

Create a file in the root of your project with the contents below; don't forget chmod +x <filename>.

    #!/usr/bin/env node
    /*jshint laxcomma:true strict:false*/
    /*globals require*/
    var sherpa = require("sherpa");

    var backpack = {
          js    : function (filename) {
            sherpa.exec(filename, "grunt js");
          }
          ,less : function (filename) {
            sherpa.exec(filename, "grunt less");
          }
        };

    sherpa("src", 300, function (filename, curr, prev) {
      if (+curr.mtime !== +prev.mtime) {
        try {
          backpack[/.*\.(.*)$/.exec(filename)[1]](filename);
        } catch (e) {
          sherpa.exec(filename + "\n But I don't know what to do with it. :-(");
        }
      }
    });

## Testing

I have started some simple tests using expresso. To run tests simply ensure that the npm modules are installed by executing `npm install` in the root directory. Then execute `expresso` in the root. Hopefully all tests should pass.