Function _require

src/main/js/lib/require.js:195–353

(parentFile, path, options)

   require() function implementation
   */
  function _require(parentFile, path, options) {
    var file,
      canonizedFilename,
      moduleInfo,
      buffered,
      code = '',
      line = null;

    if (typeof options == 'undefined') {
      options = { cache: true };
    } else {
      if (typeof options.cache == 'undefined') {
        options.cache = true;
      }
    }

    file = resolveModuleToFile(path, parentFile);
    if (!file) {
      var errMsg =
        '' +
        _format(
          "require() failed to find matching file for module '%s' " +
            "in working directory '%s' ",
          [path, parentFile.canonicalPath]
        );
      if (!('' + path).match(/^\./)) {
        errMsg =
          errMsg + ' and not found in paths ' + JSON.stringify(modulePaths);
      }
      var find = _require(parentFile, 'find').exports;
      var allJS = [];
      for (var i = 0; i < modulePaths.length; i++) {
        var js = find(modulePaths[i]);
        for (var j = 0; j < js.length; j++) {
          if (js[j].match(/\.js$/)) {
            allJS.push(js[j].replace(modulePaths[i], ''));
          }
        }
      }
      var pathL = path.toLowerCase();
      var candidates = [];
      for (i = 0; i < allJS.length; i++) {
        var filenameparts = allJS[i];
        var candidate = filenameparts.replace(/\.js/, '');
        var lastpart = candidate.toLowerCase();
        if (pathL.indexOf(lastpart) > -1 || lastpart.indexOf(pathL) > -1) {
          candidates.push(candidate);
        }
      }
      if (candidates.length > 0) {
        errMsg +=
          '\nBut found module/s named: ' +
          candidates.join(',') +
          ' - is this what you meant?';
      }
      throw new Error(errMsg);
    }
    canonizedFilename = _canonize(file);