Returns the list of modules required to load a YUI module. Doesn't manage triggers and conditionals.

get-requirements.js

/*global YUI*/
YUI.add("get-depenedencies", function (Y) {
  /**
   * Provides a method to recursively lookup YUI module dependencies
   * 
   * @module get-depenedencies
   */

  /**
   Retrieves the entire module dependency list for the given module.
   
   @for YUI
   @method getDependencies
   @param name {String} The module name to look up
   @return {Array} The dependencies required to load the module.
   **/
  Y.getDependencies = function (name) {
    var reqs = {},
      queue = [name],
      module,
      oModule;

    do {
      module = queue.shift();
      reqs[module] = true;
      oModule = Y.Env._loader.moduleInfo[module];
      if (oModule && oModule.requires) 
      queue = queue.concat(oModule.requires);
    } while (queue.length);
    return Y.Object.keys(reqs);
  };

});