prerender.ts

import 'reflect-metadata';
import 'zone.js';

import {renderModule} from '@angular/platform-server';
import {readFileSync, writeFileSync} from 'fs';
import {join} from 'path';
import {runfiles} from '@bazel/runfiles';

import {KitchenSinkRootServerModule} from './kitchen-sink-root';

// Do not enable production mode, because otherwise the `MatCommonModule` won't execute
// the browser related checks that could cause NodeJS issues.

// Resolve the path to the "index.html" through Bazel runfile resolution.
const indexHtmlPath = runfiles.resolvePackageRelative('./index.html');

const result = renderModule(KitchenSinkRootServerModule, {
  document: readFileSync(indexHtmlPath, 'utf-8'),
});
const outDir = process.env.TEST_UNDECLARED_OUTPUTS_DIR as string;

result
  .then(content => {
    const filename = join(outDir, 'index-prerendered.html');

    console.log('Inspect pre-rendered page here:');
    console.log(`file://${filename}`);
    writeFileSync(filename, content, 'utf-8');
    console.log('Prerender done.');
  })
  // If rendering the module factory fails, print the error and exit the process
  // with a non-zero exit code.
  .catch(error => {
    console.error(error);
    process.exit(1);
  });