rollup-plugin-angular/dist/rollup-plugin-angular.esm.js

import fs from 'fs';
import path from 'path';
import MagicString from 'magic-string';
import { createFilter } from 'rollup-pluginutils';

var componentRegex = /@Component\({([\s\S]*)}\)$/gm;
var templateUrlRegex = /templateUrl\s*:(.*)/g;
var styleUrlsRegex = /styleUrls\s*:(\s*\[[\s\S]*?\])/g;
var stringRegex = /(['"])((?:[^\\]\\\1|.)*?)\1/g;

function insertText(str, dir, preprocessor) {
  if ( preprocessor === void 0 ) preprocessor = function (res) { return res; };

  return str.replace(stringRegex, function (match, quote, url) {
    var includePath = path.join(dir, url);
    var text = fs.readFileSync(includePath).toString();
    return '`' + preprocessor(text, includePath) + '`';
  });
}

function angular(options) {
  if ( options === void 0 ) options = {};

  options.preprocessors = options.preprocessors || {};

  // ignore @angular/** modules
  options.exclude = options.exclude || [];
  if (typeof options.exclude === 'string' || options.exclude instanceof String) { options.exclude = [options.exclude]; }
  if (options.exclude.indexOf('node_modules/@angular/**') === -1) { options.exclude.push('node_modules/@angular/**'); }

  var filter = createFilter(options.include, options.exclude);

  return {
    name: 'angular',
    transform: function transform(source, map) {
      if (!filter(map)) { return; }

      var magicString = new MagicString(source);
      var dir = path.parse(map).dir;

      var hasReplacements = false;
      var match;
      var start, end, replacement;

      while ((match = componentRegex.exec(magicString)) !== null) {
        start = match.index;
        end = start + match[0].length;

        replacement = match[0]
          .replace(templateUrlRegex, function (match, url) {
            hasReplacements = true;
            return 'template:' + insertText(url, dir, options.preprocessors.template);
          })
          .replace(styleUrlsRegex, function (match, urls) {
            hasReplacements = true;
            return 'styles:' + insertText(urls, dir, options.preprocessors.style);
          });

        if (hasReplacements) { magicString.overwrite(start, end, replacement); }
      }

      if (!hasReplacements) { return null; }

      var result = { code: magicString.toString() };
      if (options.sourceMap !== false) { result.map = magicString.generateMap({ hires: true }); }

      return result;
    }
  };
}

export default angular;