2019-12-07 16:10:32 +00:00
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#!/usr/bin/env node
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const fs = require('fs');
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const argparse = require('argparse');
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const markdownIt = require('markdown-it');
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const markdownItTaskCheckbox = require('markdown-it-task-checkbox');
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const markdownItEmoji = require('markdown-it-emoji');
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const markdownItHeaderAnchors = require('./markdown-it-header-anchors');
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2020-09-06 16:07:36 +00:00
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const Prism = require('prismjs/components/prism-core');
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2019-12-07 16:10:32 +00:00
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const loadPrismLanguages = require('prismjs/components/');
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2020-09-06 16:07:36 +00:00
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const PRISM_COMPONENTS = require('prismjs/components.js');
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2019-12-07 16:10:32 +00:00
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2020-09-06 08:43:17 +00:00
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// TODO: integrate <https://github.com/PrismJS/prism-themes>
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const PRISM_THEMES = Object.keys(PRISM_COMPONENTS.themes).filter(
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(k) => k !== 'meta',
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);
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2019-12-07 16:10:32 +00:00
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let parser = new argparse.ArgumentParser();
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2020-09-06 08:43:17 +00:00
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parser.addArgument('INPUT_FILE', {
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2019-12-07 16:10:32 +00:00
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nargs: argparse.Const.OPTIONAL,
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help: '(stdin by default)',
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});
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2020-09-06 08:43:17 +00:00
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parser.addArgument('OUTPUT_FILE', {
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2019-12-07 16:10:32 +00:00
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nargs: argparse.Const.OPTIONAL,
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help: '(stdout by default)',
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});
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2020-09-06 08:43:17 +00:00
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parser.addArgument('--input-encoding', {
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defaultValue: 'utf-8',
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help: '(utf-8 by default)',
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});
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parser.addArgument('--output-encoding', {
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defaultValue: 'utf-8',
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help: '(utf-8 by default)',
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});
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parser.addArgument('--no-default-stylesheets', {
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nargs: argparse.Const.SUPPRESS,
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});
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parser.addArgument('--syntax-theme', {
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choices: PRISM_THEMES,
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});
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parser.addArgument('--stylesheet', {
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nargs: argparse.Const.ZERO_OR_MORE,
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});
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parser.addArgument('--script', {
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nargs: argparse.Const.ZERO_OR_MORE,
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});
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2019-12-07 16:10:32 +00:00
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let args = parser.parseArgs();
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let md = markdownIt({
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html: true,
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linkify: true,
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2020-09-06 16:07:36 +00:00
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highlight: (code, lang) => {
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if (lang) {
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2019-12-07 16:10:32 +00:00
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loadPrismLanguages([lang]);
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2019-12-11 21:03:10 +00:00
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if (Object.prototype.hasOwnProperty.call(Prism.languages, lang)) {
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2020-09-06 16:07:36 +00:00
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return Prism.highlight(code, Prism.languages[lang], lang);
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2019-12-11 21:03:10 +00:00
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}
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2019-12-07 16:10:32 +00:00
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}
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2020-09-06 16:07:36 +00:00
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return null;
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2019-12-07 16:10:32 +00:00
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},
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});
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md.use(markdownItTaskCheckbox);
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md.use(markdownItEmoji);
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md.use(markdownItHeaderAnchors);
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2020-09-06 08:43:17 +00:00
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let markdownDocument = fs.readFileSync(
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args.get('INPUT_FILE', 0),
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args.get('input_encoding'),
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2020-07-06 15:51:13 +00:00
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);
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2020-09-06 08:43:17 +00:00
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let renderedMarkdown = md.render(markdownDocument);
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let stylesheetsTexts = [];
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let scriptsTexts = [];
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let syntaxThemeName = null;
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if (!args.get('no_default_stylesheets')) {
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syntaxThemeName = 'prism';
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stylesheetsTexts.push(
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fs.readFileSync(
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require.resolve('github-markdown-css/github-markdown.css'),
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'utf-8',
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),
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fs.readFileSync(
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require.resolve('./github-markdown-additions.css'),
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'utf-8',
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),
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);
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}
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syntaxThemeName = args.get('syntax_theme') || syntaxThemeName;
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if (syntaxThemeName) {
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stylesheetsTexts.push(
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fs.readFileSync(
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require.resolve(`prismjs/themes/${syntaxThemeName}.css`),
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'utf-8',
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),
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);
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}
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for (let stylesheetPath of args.get('stylesheet', [])) {
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stylesheetsTexts.push(fs.readFileSync(stylesheetPath));
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}
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for (let scriptPath of args.get('script', [])) {
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scriptsTexts.push(fs.readFileSync(scriptPath));
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}
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2019-12-07 16:10:32 +00:00
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let renderedHtmlDocument = `
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta http-equiv="X-UA-Compatible" content="ie=edge">
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2020-09-06 08:43:17 +00:00
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${stylesheetsTexts.map((s) => `<style>\n${s}\n</style>`).join('\n')}
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2019-12-07 16:10:32 +00:00
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</head>
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<body>
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<article class="markdown-body">
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${renderedMarkdown}
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</article>
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2020-09-06 08:43:17 +00:00
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${scriptsTexts.map((s) => `<script>\n${s}\n</script>`).join('\n')}
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2019-12-07 16:10:32 +00:00
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</body>
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</html>
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`;
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2020-09-06 08:43:17 +00:00
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fs.writeFileSync(
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args.get('OUTPUT_FILE', 1),
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renderedHtmlDocument,
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args.get('output_encoding'),
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);
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