Node script for migrating all images in markdown posts into figure tags.

migrate.js

/**
 * usage:
 * 
 * 	$ node migrate.js path/to/posts/dir
 */
var fs = require('fs');
var path = require('path');

var ENCODING = 'utf8';

var target = process.argv[2];

fs.readdirSync(target).forEach(function (file) {
  var filePath = path.join(__dirname, target, file);
	var content = fs.readFileSync(filePath, ENCODING)
		.replace(/\[!\[\]\((.+)\)\].+\n([^\s]+)/g, function (matcher, url, caption) {
			// console.log('>>>', url);
			return '<figure>' +
				'<img src="' + url.replace(/\/s\d+\//, '/s800/') + '" height="267" width="400" data-origin-width="600" data-origin-height="400" />' +
				'<figcaption>' + caption + '</figcaption>' +
				'</figure>';
		});
	// console.log(content);
	fs.writeFileSync(filePath, content);
});