message: Temporarily disable cleaning out the source dir.
diff: @@ -18,9 +18,9 @@ require('source-map-support').install();
  import * as path from 'path';
  import {exec} from 'mz/child_process';
  import {convertPackage} from '../convert-package';
  -import rimraf = require('rimraf');
  +// import rimraf = require('rimraf');
  -const repoUrl = 'https://github.com/Polymer/polymer.git';
  +// const repoUrl = 'https://github.com/Polymer/polymer.git';
  const fixturesDirPath =
  path.resolve(__dirname, '../../fixtures/generated/polymer');
  const sourceDir = path.join(fixturesDirPath, 'source');
  @@ -29,11 +29,11 @@ const convertedDir = path.join(fixturesDirPath, 'expected');
  (async () => {
  await exec(`mkdir -p ${fixturesDirPath}`);
  - console.log(`Cloning ${repoUrl} to ${sourceDir}...`);
  - rimraf.sync(sourceDir);
  - await exec(
  - 'git clone https://github.com/Polymer/polymer.git source --depth=1',
  - {cwd: fixturesDirPath});
  + // console.log(`Cloning ${repoUrl} to ${sourceDir}...`);
  + // rimraf.sync(sourceDir);
  + // await exec(
  + // 'git clone https://github.com/Polymer/polymer.git source --depth=1',
  + // {cwd: fixturesDirPath});
  console.log(`Converting...`);
  await convertPackage({
  