getTemplateComments.js

(function() {
  var out = {};
  var n;
  var walk = document.createTreeWalker(
    document,
    NodeFilter.SHOW_COMMENT,
    { acceptNode: function(n) { return n.nodeValue.substring(1, 7) === './src/'; } },
    false
  );
  while ((n = walk.nextNode()) !== null) {
    out[n.nodeValue.substring(0, n.nodeValue.length - 3)] = true;
  }
  console.log(Object.keys(out).join('\n'));
})();