bromote/index.js

Tool to setup and require remote scripts with browserify.

'use strict';

var xtend        =  require('xtend');
var runnel       =  require('runnel');
var cleanLoaders =  require('./lib/clean-loaders');
var genRemote    =  require('./lib/gen-remote');
var genIndex     =  require('./lib/gen-index'); 

/**
 * Generates all remote loaders and adds them to browserify instance if it is given.
 * Calls back with paths to generated loaders.
 *
 * @name exports
 * @function
 * @param bify {Object} browserify instance (optional) but recommended
 * @param remote {Object} hashtable containing information about remote scripts for which to generate and add loaders
 * @param cb {Function} called back with paths to generated loaders
 */
module.exports = function addRemoteScripts(bify, remote, cb) {

  if (typeof remote == 'function') {
    cb = remote;
    remote = bify;
    bify = null;
  }

  cleanLoaders(function (err) {
    if (err) return cb(err);  
    if (!remote) return cb(null, []);

    var keys = Object.keys(remote); 
    if (!keys.length) return cb(null, []);
    
    var tasks = [ runnel.seed([]) ]
      .concat(keys.map(
        function (k) {
          var rem = remote[k];
          rem.key = k;

          return function (acc, cb) { 
            genRemote(rem, function (err, gen) {
              if (err) return cb(err);
              acc.push(gen);
              cb(null, acc);
            });
          };
        })
      )
      .concat(genIndex)
      .concat(function done (err, acc) {
        if (err) return cb(err);
        if (bify) acc.forEach(bify.add.bind(bify));

        cb(null, acc);
      });

    runnel(tasks);
  });
};