Add find_timeouts and caching to tools/gardening

tools/gardening/bin/status_summary.dart

 // Copyright (c) 2017, 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.
 
 /// Collects the configurations for all status files in the 'tests' folder that
 /// mention one of the test names given as argument.
 
 import 'dart:async';
 import 'dart:math' hide log;
 import 'dart:io';
 
+import 'package:args/args.dart';
 import 'package:gardening/src/util.dart';
 
 main(List<String> args) async {
-  if (args.length == 0) {
-    print('Usage: status_summary <test-name1> [<test-name2> ...]');
+  ArgParser argParser = createArgParser();
+  ArgResults argResults = argParser.parse(args);
+  processArgResults(argResults);
+  if (argResults.rest.length == 0) {
+    print('Usage: status_summary [options] <test-name1> [<test-name2> ...]');
+    print('where options are:');
+    print(argParser.usage);
     exit(1);
   }
   int maxStatusWidth = 0;
   int maxConfigWidth = 0;
 
   List<Uri> statusFiles = await findStatusFiles('tests');
   Map<String, List<StatusFile>> statusMap = <String, List<StatusFile>>{};
   for (Uri uri in statusFiles) {
     Map<String, StatusFile> currentMap = <String, StatusFile>{};
     log('Scanning $uri');
     String currentConfig = '';
     for (String line in new File.fromUri(uri).readAsLinesSync()) {
       if (line.startsWith('[')) {
         currentConfig = line;
       } else {
         int colonIndex = line.indexOf(':');
         if (colonIndex != -1) {
           String testName = line.substring(0, colonIndex).trim();
           int hashIndex = line.indexOf('#', colonIndex + 1);
           String status;
           String comment;
           if (hashIndex != -1) {
             status = line.substring(colonIndex + 1, hashIndex).trim();
             comment = line.substring(hashIndex + 1).trim();
           } else {
             status = line.substring(colonIndex + 1).trim();
             comment = '';
           }
 
-          for (String arg in args) {
+          for (String arg in argResults.rest) {
             if (testName.contains(arg) || arg.contains(testName)) {
               StatusFile statusFile =
                   currentMap.putIfAbsent(testName, () => new StatusFile(uri));
               statusFile.entries
                   .add(new StatusEntry(currentConfig, status, comment));
 
               maxStatusWidth = max(maxStatusWidth, status.length);
               maxConfigWidth = max(maxConfigWidth, currentConfig.length);
             }
           }
@@ skipping 45 matching lines @@
   /// The status of the entry, e.g. `Pass, Slow`.
   final String status;
 
   /// The comment after the status, if any.
   final String comment;
 
   StatusEntry(this.config, this.status, this.comment);
 
   String toString() => '$status $config $comment';
 }