duster/js/dustjs_shim.js

var dust = require('dustjs-linkedin');
var fs = require('fs');
const path = require('path');

var argv = process.argv.slice(2);
if (argv.length < 1) {
  console.error("Expecting only 1 argument (a path to a template)");
  process.exit(1);
}
var context = JSON.parse(fs.readFileSync(0, 'utf-8'));
var main_template = path.parse(argv[0])["name"];

for (var i = 0, len = argv.length; i < len; ++i) {
  var filename = path.parse(argv[i])["name"];

  try {
    var template_source = fs.readFileSync(argv[i], 'utf-8');
  } catch (err) {
    console.error(err);
    process.exit(1);
  }

  var compiled_template = dust.compile(template_source, filename);
  dust.loadSource(compiled_template);

}

dust.render(main_template, context, function(err, out) {
  if(err) {
    console.error(err);
    process.exit(1);
  } else {
    console.log(out);
    process.exit(0);
  }
});