gistfile1.rb

Mustache.to_javascript("Hello {{planet}}")

gistfile2.js

function (obj) {
  var out, l1, stack, fetch, escape, isFunction;
  out = [];
  stack = [];
  stack.push(obj);
  fetch = function fetch(key) {
    var i, v;
    for (i = stack.length - 1; i >= 0; i -= 1) {
      v = stack[i][key];
      if (v) {
        return v;
      }
    }
  };
  escape = function escape(value) {
    return ('' + value)
      .replace(/&/g, '&')
      .replace(/</g, '&lt;')
      .replace(/>/g, '&gt;')
      .replace(/"/g, '&quot;');
  };
  isFunction = function isFunction(obj) {
    return !!(obj && obj.constructor && obj.call && obj.apply);
  };
  out.push("Hello ");
  l1 = fetch("planet");
  if (isFunction(l1)) {
    l1 = l1();
  }
  out.push(escape(l1));
  return out.join("");
}