scripts/build/generate_html_entrypoint.js

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import fs from 'node:fs';
import path from 'node:path';
import yargs from 'yargs';
import {hideBin} from 'yargs/helpers';

import {writeIfChanged} from './ninja/write-if-changed.js';

const {template, outDirectory, entrypoints} = yargs(
                                                  hideBin(process.argv),
                                                  )
                                                  .parseSync();

if (!template) {
  throw new Error(
      'Must specify --template location with the location of the HTML entrypoint template.',
  );
}

if (!outDirectory) {
  throw new Error(
      'Must specify --out-directory location where the outputs must live.',
  );
}

if (!entrypoints) {
  throw new Error('Must specify at least one entrypoint name.');
}

if (!Array.isArray(entrypoints)) {
  throw new Error('Must specify multiple entrypoints as array');
}

const templateContent = fs.readFileSync(template, 'utf-8');

for (const entrypoint of entrypoints) {
  const rewrittenTemplateContent = templateContent.replace(
      new RegExp('%ENTRYPOINT_NAME%', 'g'),
      entrypoint,
  );
  writeIfChanged(
      path.join(outDirectory, `${entrypoint}.html`),
      rewrittenTemplateContent,
  );
}