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

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'));

try {
  var template_source = fs.readFileSync(argv[0], 'utf-8');
} catch (err) {
  console.error(err);
  process.exit(1);
}

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

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