Grinder wrapper for doc generation.

tool/doc.dart

 // Copyright (c) 2015, 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.
 
 import 'dart:io';
 
 import 'package:args/args.dart';
 import 'package:linter/src/linter.dart';
 import 'package:linter/src/rules.dart';
 import 'package:markdown/markdown.dart';
 
 /// Generates lint rule docs for publishing to http://dart-lang.github.io/
 void main([List<String> args]) {
   var parser = new ArgParser(allowTrailingOptions: true);
 
   parser.addOption('out', abbr: 'o', help: 'Specifies output directory.');
 
   var options;
   try {
     options = parser.parse(args);
   } on FormatException catch (err) {
     printUsage(parser, err.message);
     return;
   }
 
   var outDir = options['out'];
-
-  if (outDir != null) {
-    Directory d = new Directory(outDir);
-    if (!d.existsSync()) {
-      print("Directory '${d.path}' does not exist");
-      return;
-    }
-  }
-
-  // Generate index
-  new Indexer(ruleRegistry).generate(outDir);
-
-  // Generate rule files
-  rules.forEach((l) => new Generator(l).generate(outDir));
-
-  // Generate options samples.
-  new OptionsSample(rules).generate(outDir);
+  generateDocs(outDir);
 }
 
 const ruleFootMatter = '''
 In addition, rules can be further distinguished by *maturity*.  Unqualified
 rules are considered stable, while others may be marked **experimental**
 to indicate that they are under review.
 
 Rules can be selectively enabled in the analyzer using
 [analysis options](https://pub.dartlang.org/packages/analyzer).  An
 auto-generated list enabling all options is provided
@@ skipping 26 matching lines @@
     .map((r) => '${toDescription(r)}')
     .join('\n\n');
 
 String get enumerateStyleRules => rules
     .where((r) => r.group == Group.style)
     .map((r) => '${toDescription(r)}')
     .join('\n\n');
 
 List<String> get sortedRules => rules.map((r) => r.name).toList()..sort();
 
+void generateDocs(String outDir) {
+  if (outDir != null) {
+    Directory d = new Directory(outDir);
+    if (!d.existsSync()) {
+      print("Directory '${d.path}' does not exist");
+      return;
+    }
+  }
+
+  // Generate index
+  new Indexer(ruleRegistry).generate(outDir);
+
+  // Generate rule files
+  rules.forEach((l) => new Generator(l).generate(outDir));
+
+  // Generate options samples.
+  new OptionsSample(rules).generate(outDir);
+}
+
 void printUsage(ArgParser parser, [String error]) {
   var message = 'Generates lint docs.';
   if (error != null) {
     message = error;
   }
 
   stdout.write('''$message
 Usage: doc
 ${parser.usage}
 ''');
@@ skipping 244 matching lines @@
       <script type="text/javascript">
          try {
            var pageTracker = _gat._getTracker("UA-34425814-2");
          pageTracker._trackPageview();
          } catch(err) {}
       </script>
    </body>
 </html>
 ''';
 }