tracing/tracing/value/diagnostics/discover_cmdline.html

<!DOCTYPE html>
<!--
Copyright 2017 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<link rel="import" href="/tracing/value/diagnostics/diagnostic.html">

<script>
'use strict';
/* eslint-disable no-console */

function isDiagnosticSubclass(cls) {
  cls = cls.__proto__;
  while (cls) {
    if (cls === tr.v.d.Diagnostic) return true;
    cls = cls.__proto__;
  }
  return false;
}

function discoverDiagnostics(args) {
  const discoveryMode = args.shift();
  for (const arg of args) HTMLImportsLoader.loadHTML(arg);

  const results = [];
  if (discoveryMode === 'registry') {
    for (const typeInfo of tr.v.d.Diagnostic.getAllRegisteredTypeInfos()) {
      results.push(typeInfo.constructor.name);
    }
  } else if (discoveryMode === 'namespace') {
    for (const cls of Object.values(tr.v.d)) {
      if (isDiagnosticSubclass(cls)) results.push(cls.name);
    }
  } else {
    console.log('First argument must be either "registry" or "namespace".');
    return 1;
  }
  console.log(JSON.stringify(results));
  return 0;
}

if (tr.isHeadless) {
  quit(discoverDiagnostics(sys.argv.slice(1)));
}
</script>