proxyquireify/lib/transform.js

Proxies browserify's require in order to allow overriding dependencies during testing.

'use strict';

var through          =  require('through')
  , requireDeps      =  require('require-deps')
  , findDependencies =  require('./find-dependencies')
    ;

function requireDependencies(src) {
  var deps = findDependencies(src);
  if (!deps.length) return '';
  return '/* proxyquireify injected requires to make browserify include dependencies in the bundle */ /* istanbul ignore next */; (function __makeBrowserifyIncludeModule__() { ' +
    requireDeps(deps) + '});';
}

module.exports = function (file) {
  if (file === require.resolve('../index')) return through();
  if (/\.json$/.test(file)) return through();
  var data = '';

  return through(write, end);
    
  function write (buf) { data += buf; }
  function end() {
    var deps = requireDependencies(data);
    this.queue(deps);
    this.queue(data);
    this.queue(null);
  }
};