```const Parser = require('tree-sitter');
const AgsScript = require('tree-sitter-ags-script');
const Yargs = require("yargs");
// move all your imports/requires to the top level unless you're doing dynamic loading, but that isn't the case here.
const fs = require('fs');

const parser = new Parser();
parser.setLanguage(AgsScript);

const argv = Yargs.scriptName("ash2doc")
  .usage('Usage: $0 <command> [options]')
  .command('mark', 'Extract .ash comments to Markdown')
  .example('$0 mark -f foo.ash', 'Turns comments in the given .ash file to markdown')
  .alias('f', 'file')
  .nargs('f', 1)
  .describe('f', 'Load a file')
  .alias('l', 'level')
  .nargs('l', 1)
  .describe('l', 'Initial header level')
  .demandOption(['f'])
  .help('h')
  .alias('h', 'help')
  .epilog('copyright 2019')
  .argv;

const hl = () => {
  switch (argv.level) {
    case '1':
      hl = "#";
      break;
    case '2':
      hl = "##";
      break;
    case '3':
      hl = "###"
      break;
    default:
      break;
  }
}

const cursor = fs.readFile(argv.file, (err, data) => {
  if (err) throw err;
  return parser.parse(data.toString()).walk()
})


  let lastComment,
  reportText,
  structName;

  function commentNode(nodeText) {
    nodeText.starsWith('///') ? nodeText.substr(3, nodeText.length - 3) : ''
  }

  function importDeclaration(nodeText) {
    const funcText = nodeText.replace('import', '').replace(';', '')
    return `${reportText}

    ${hl} ${funcText}

    ${lastComment}
    `
  }

  function handleFieldDeclarationList(c2) {
    for (var notEnd_c2 = c2.gotoFirstChild();
      notEnd_c2;
      notEnd_c2 = c2.gotoNextSibling()) {
  }

  function handleStructDeclaration(c1) {
    for (let NotEnd_c1 = c1.gotoFirstChild(); notEnd_c1; notEnd_c1 = c1.gotoNextSibling()) {
      switch (c1.nodeType) {
        case 'type_identifier':
          structName = c1.nodeText;
          reportText = `${reportText}

          ${hl} ${structName}

          `
          break;
        case 'field_declaration_list':
          handleFieldDeclarationList(c1.currentNode.walk())
          break;
      }
    }
  }

  for (var notEnd = cursor.gotoFirstChild();
    notEnd;
    notEnd = cursor.gotoNextSibling()) {

      switch (cursor.nodeType) {
        case 'comment':
          lastComment = commentNode(cursor.nodeText);
          break;
        case 'import_declaration':
          lastComment = '';
          reportText = importDeclaration(cursor.nodeText());
          break;
```