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tools/html_json_doc/bin/html_json_doc.dart

Index: tools/html_json_doc/bin/html_json_doc.dart
diff --git a/tools/html_json_doc/bin/html_json_doc.dart b/tools/html_json_doc/bin/html_json_doc.dart
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+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/**
+ * TODO(amouravski): Document stuff here.
+ */
+
+import 'dart:io';
+
+import '../lib/html_to_json.dart' as html_to_json;
+import '../lib/json_to_html.dart' as json_to_html;
+import '../../../pkg/args/lib/args.dart';
+
+// Need this because ArgParser.getUsage doesn't show command invocation.
+const USAGE = 'Usage htmlJsonDoc [options] --mode=<mode> <HTML.dart directory> '
+    '<json path>\n[options] include:';
+final argParser = new ArgParser();
+
+main() {
+  final args = new Options().arguments;
+
+  if (args.isEmpty) {
+    printUsage('No arguments provided.');
+    return;
+  }
+
+  var mode;
+  argParser.addOption('mode', abbr: 'm',
+      help: '(Required) Convert from HTML docs to JSON or vice versa.',
+      allowed: ['html-to-json', 'json-to-html'], allowedHelp: {
+        'html-to-json': 'Processes all HTML .dart files at given\n'
+          'location and outputs JSON.',
+          'json-to-html': 'Takes JSON file at location and inserts docs into\n'
+      'HTML .dart files.'},
+      callback: (m) => mode = m
+  );
+  
+  final argResults = argParser.parse(args);
+
+  if (mode == null) {
+    printUsage('Mode is a required option.');
+    return;
+  } else if (argResults.rest.length < 2) {
+    printUsage('Insufficient arguments.');
+    return;
+  }
+
+  var htmlPath = new Path.fromNative(argResults.rest[0]);
+  var jsonPath = new Path.fromNative(argResults.rest[1]);
+
+  var convertFuture;
+  if (mode == 'html-to-json') {
+    convertFuture = html_to_json.convert(htmlPath, jsonPath);
+  } else {
+    convertFuture = json_to_html.convert(htmlPath, jsonPath);
+  }
+
+  convertFuture.then((anyErrors) {
+    print('Completed ${anyErrors ? "with" : "without"} errors.');
+  });
+}
+
+/// Prints the usage of the tool. [message] is printed if provided.
+void printUsage([String message]) {
+  print(message);
+  print(USAGE);
+  print(argParser.getUsage());
+}