Render Markdown files as templates

markdown-express-render.js

'use strict';
var fs = require('fs')
  , marked = require('marked')
  ;

module.exports = function (options) {

  if (!options) {
    options = {};
  }
  marked.setOptions(options);

  if (typeof options.render != 'function') {
    options.render = function (template, data) {
      return template;
    }
  }

  return function (path, locals, cb) {
    if (cb) {
      fs.readFile(path, {encoding: 'utf8', flag: 'r'}, function (err, input) {
          if (err) {
            return cb(err);
          }
          marked(input, function (err, output) {
              if (err) {
                return cb(err);
              }
              cb(null, options.render(output, locals));
            }
          );
        }
      );
    }
    else {
      return options.render(marked(fs.readFileSync(path, {encoding: 'utf8', flag: 'r'})), locals);
    }
  };

}