GruntJS task for minify, handlebars, and JST compilation

jsthb.js

/*global process: true, module: true*/
// JST-HB
//
// Description: Compile handlebars templates to JST file.
//
var fs         = require('fs'),
    path       = require('path'),
    Handlebars = require('handlebars'),
    _          = require('underscore'),
    minify     = require('html-minifier');

module.exports = function(grunt) {
  grunt.task.registerMultiTask("jsthb",
    "Compile handlebars templates to JST file", function() {

    var
      name      = this.target,
      data      = this.data,
      src       = path.resolve(this.data.src),
      dest      = path.resolve(this.data.dest),
      dir       = path.resolve('./'),
      namespace = this.data.namespace || null,
      files     = grunt.file.expand(src);

    // let the developer know where we are writing
    grunt.verbose.or.write('Writing to "' + dest + '"\n');

    // Write the destination file with the contents from the jsthb
    // helper output.
    grunt.file.write(
        dest,
        grunt.task.helper(
            "jsthb", files, namespace, dir
        )
    );

    // If we've had an error, the build needs to stop
    if (this.errorCount) { return false; }

    // Let the process continue, and let the developer know that
    // everything went ok.
    grunt.verbose.or.ok();
  });

  // Build a compiled template file
  grunt.task.registerHelper("jsthb", function(files, namespace, dir) {
    var source, contents;

    // This file should be an anon function that inserts the JST
    // or other namespace into the window namespace.
    contents = "define(['use!handlebars'], function(Handlebars) { JST = {};\n";

    // Compile the template and place it into our compiled template object
    contents += files ? _.map(files, function(filepath) {

      var tpl,
          path = filepath
            .replace(dir + '/app/templates/', '')
            .replace('.html','');
      tpl = minify.minify(grunt.file.read(filepath), {
          removeComments: true,
          collapseWhitespace: true
      });
      return "JST['" + path  + "'] " +
          "= Handlebars.template(" +
          Handlebars.precompile(tpl) +
          ");\n";
    }).join("\n") : "";

    return contents + "\n" + "return JST; });";
  });
};