sources-of-light/index.mjs

import fs from 'fs';
import path from 'path';
import puppeteer from 'puppeteer-core';
import {fileURLToPath} from 'url';

const filename = fileURLToPath(import.meta.url);
const dirname = path.dirname(filename);
const renderedDir = path.join(dirname, 'rendered');

fs.mkdirSync(renderedDir, { recursive: true });

const files = fs.readdirSync(path.join(dirname, 'pages'))
    .sort()
    .map(file => path.join(dirname, 'pages', file));

const browser = await puppeteer.launch({
    browser: 'firefox',
    executablePath: '/usr/bin/firefox',
});
const page = await browser.newPage();

for (const file of files) {
    const targetFile = path.join(renderedDir, path.basename(file, '.html') + '.pdf');

    console.log(`processing ${path.basename(file)}...`);

    await page.goto(`file://${file}`);

    await page.pdf({
        width: '9.25in',
        height: '12.25in',
        path: targetFile,
        printBackground: true,
    });

    console.log(`  generated PDF at ${targetFile}`);
}

await browser.close();