Move markdown library.

This moves markdown into two places:

- The one under samples/ is intended to be a "real" markdown parser.
  Eventually, it will probably live as a third-party library outside of our
  standard lib but still easily accessible.
- The one inside dartdoc will change to become the parser used to parse
  Gilad's forthcoming dartdoc comment syntax.

Review URL: http://codereview.chromium.org//8953042

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@2606 260f80e4-7a28-3924-810f-c04153c831b5

utils/dartdoc/dartdoc.dart

@@ -18,7 +18,7 @@
 #import('../../frog/lang.dart');
 #import('../../frog/file_system.dart');
 #import('../../frog/file_system_node.dart');
-#import('../markdown/lib.dart', prefix: 'md');
+#import('markdown.dart', prefix: 'md');
 
 #source('classify.dart');
 #source('comment_map.dart');

utils/dartdoc/markdown.dart

@@ -2,9 +2,7 @@
 // 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.
 
-/// Parses text in markdown format. Use this entrypoint if you want to parse
-/// markdown from your own Dart code. To parse markdown by running the script
-/// directly from the command line, see markdown.dart.
+/// Parses text in a markdown-like format and renders to HTML.
 #library('markdown');
 
 #source('ast.dart');

utils/dartdoc/test/markdown_tests.dart

@@ -5,7 +5,7 @@
 /// Unit tests for markdown.
 #library('markdown_tests');
 
-#import('../lib.dart');
+#import('../markdown.dart');
 
 // TODO(rnystrom): Better path to unittest.
 #import('../../../client/testing/unittest/unittest_vm.dart');

utils/markdown/README.txt

@@ -1,4 +0,0 @@
-A markdown parsing library in Dart.
-
-If you want to use this as a library, import "lib.dart". To use it as a
-standalone script, run "markdown.dart".

utils/markdown/markdown.dart

@@ -1,46 +0,0 @@
-// Copyright (c) 2011, 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.
-
-/// Standalone script for parsing markdown from files and converting to HTML.
-#library('markdown_app');
-
-#import('lib.dart');
-
-main() {
-  final args = (new Options()).arguments;
-
-  if (args.length > 2) {
-    print('Usage:');
-    print('  dart markdown.dart <inputfile> [<outputfile>]');
-    print('');
-    print('Reads a file containing markdown and converts it to HTML.');
-    print('If <outputfile> is omitted, prints to stdout.');
-    return;
-  }
-
-  final source = readFile(args[0]);
-  final html = markdownToHtml(source);
-
-  if (args.length == 1) {
-    print(html);
-  } else {
-    writeFile(args[1], html);
-  }
-}
-
-String readFile(String path) {
-  final file = (new File(path)).openSync();
-  final length = file.lengthSync();
-  final buffer = new List<int>(length);
-  final bytes = file.readListSync(buffer, 0, length);
-  file.closeSync();
-  return new String.fromCharCodes(buffer);
-}
-
-void writeFile(String path, String text) {
-  final file = new File(path);
-  final stream = file.openOutputStream();
-  stream.write(text.charCodes());
-  stream.close();
-}