function transform()

in packages/fbjs-scripts/gulp/module-map.js [31:60]

• 27 lines of code
• 5 McCabe index (conditional complexity)

  function transform(file, enc, cb) {
    if (file.isNull()) {
      cb(null, file);
      return;
    }

    if (file.isStream()) {
      cb(new PluginError('module-map', 'Streaming not supported'));
      return;
    }

    // Get the @providesModule piece of out the file and save that.
    var matches = file.contents.toString().match(PM_REGEXP);
    if (matches) {
      var name = matches[1];
      if (moduleMap.hasOwnProperty(name)) {
        this.emit(
          'error',
          new PluginError(
            PLUGIN_NAME,
            'Duplicate module found: ' + name + ' at ' + file.path + ' and ' +
              moduleMap[name]
          )
        );
      }
      moduleMap[name] = file.path;
    }
    this.push(file);
    cb();
  }