convert Pinboard JSON export to Markdown

pinboard-to-markdown.js

const fs = require('fs'),
	  data = fs.readFileSync('pinboard.json', { encoding: 'utf8', flag: 'r' }),
	  bookmarks = JSON.parse(data);

const dir = 'pinboard';
if (fs.existsSync(dir))
    fs.rmSync(dir, { recursive: true, force: true });
if (!fs.existsSync(dir))
    fs.mkdirSync(dir);

for (bookmark in bookmarks) {
	// if ( bookmark > 0 ) continue;
	let b = bookmarks[bookmark],
		title = b.description ? b.description : 'untitled',
		read = b.toread == 'no' ? '- [x] ' : '- [ ] ',
		tagsArray = b.tags.split(' '),
		tags = tagsArray.join(' #'),
		description = b.extended ? `\n	${b.extended}` : '',
		date = b.time.slice(0,-10),
		file = dir + '/' + date + '.md';

	output = `${read}[${title}](${b.href}) #${tags}${description}\n`;

	if ( !fs.existsSync(file) ) fs.writeFileSync(file, output);
	else fs.appendFileSync(file, output);
}