A simple front matter (YAML) with Handlebars template. Pass the name of the file into the program.

frontmatter.js

yaml = require('js-yaml');
fs   = require('fs');
Handlebars = require('hbs');

Handlebars.registerHelper("sep", function(options){
    if(options.data.last) {
        return options.inverse();
    } else {
        return options.fn();
    }
});

try {
  var fileStr = fs.readFileSync(process.argv[2], {encoding:'utf8'});
  var docStruct = fileStr.match(/^---\n([\s\S]+)---([\s\S]+)$/);
  var frontMatterStr = docStruct[1];
  var frontMatter = yaml.safeLoad(frontMatterStr);
  var template = docStruct[2];

  var cTemplate = Handlebars.compile(template);
  var result = cTemplate(frontMatter);
  console.log(result);

} catch (e) {
  console.log(e);
}