asciidoctor-chunker/src/index.mjs

Creates chunked (multi-page) HTML from Asciidoctor's single HTML file with supporting the fine-tuned splits in chapters, sections and any depth of subsections.

#!/usr/bin/env node

/*
 * This file is a part of Asciidoctor Chunker project.
 * Copyright (c) 2021 Wataru Shito (@waterloo_jp)
 */

'use strict';

import fsp from 'node:fs/promises';
import { makeChunks } from './Page.mjs';
import Node from './Node.mjs';
import { makeConfig } from './CommandOptions.mjs';
import getFilenameMaker from './FilenameMaker.mjs';
import { exists, copyRelativeFiles, mkdirs } from './Files.mjs';
import path from 'path';

const sampleHTML = 'test/resources/output/single/sample.html';
const sampleConfig = {
  outdir: 'html_chunks',
  depth: {
    default: 1, // the default extracton is chapter level
    2: 4, // extracts subsubsections in chap2
    3: 2 // extracts sections in chap 3
  },
  css: ['asciidoctor-chunker.css'],
  strictMode: true,
  titlePage: 'Titlepage',
};

const defaultConfig = {
  depth: 1, // the default extracton is chapter level
  outdir: 'html_chunks',
  css: ['asciidoctor-chunker.css'],
  strictMode: true,
  titlePage: 'Titlepage',
};

const _printer = outDir => (fnamePrefix, dom) => {
  const fname = path.format({
    dir: outDir,
    base: `${fnamePrefix}.html`
  });
  fsp.writeFile(fname, dom.html()).catch(err =>
    console.log("File write error:", fname));
}

const main = async (adocHtmlFile, config = defaultConfig) => {
  const { outdir } = config;
  if (!await exists(outdir)) await mkdirs(outdir);
  const writer = _printer(outdir);
  const node = Node.getInstanceFromFile(adocHtmlFile, null, true);
  copyRelativeFiles(adocHtmlFile, outdir)(node);
  makeChunks(writer, node, config, getFilenameMaker()); // passing the basenameMaker

  console.log(`Successfully chunked! => ${path.join(outdir, 'index.html')}\n`);
}

console.log();
const { singleHTML, config } = makeConfig(process.argv, defaultConfig);

main(singleHTML, config);