Show message that server is running when it really is (fixes #133)

lib/devc.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.
 
 /// Command line tool to run the checker on a Dart program.
 library dev_compiler.devc;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
@@ skipping 243 matching lines @@
 
     // TODO(sigmund): allow running without a dir, but keep output in memory?
     var outDir = options.outputDir;
     if (outDir == null) {
       print('error: devc in server mode also requires specifying and '
           'output location for generated code.');
       exit(1);
     }
     var port = options.port;
     var host = options.host;
-    _log.fine('Serving $entryPath at http://$host:$port/');
     var compiler = new Compiler(options);
     return new CompilerServer._(compiler, outDir, host, port, entryPath);
   }
 
   CompilerServer._(
       this.compiler, this.outDir, this.host, this.port, this._entryPath);
 
   Future start() async {
     // Create output directory if needed. shelf_static will fail otherwise.
     var out = new Directory(outDir);
     if (!await out.exists()) await out.create(recursive: true);
 
     var handler = const shelf.Pipeline()
         .addMiddleware(rebuildAndCache)
         .addHandler(shelf_static.createStaticHandler(outDir,
             defaultDocument: _entryPath));
     await shelf.serve(handler, host, port);
+    _log.fine('Serving $_entryPath at http://$host:$port/');
     compiler.run();
   }
 
   shelf.Handler rebuildAndCache(shelf.Handler handler) => (request) {
     _log.fine('requested $GREEN_COLOR${request.url}$NO_COLOR');
     // Trigger recompile only when requesting the HTML page.
     var segments = request.url.pathSegments;
     bool isEntryPage = segments.length == 0 || segments[0] == _entryPath;
     if (isEntryPage) compiler._runAgain();
 
@@ skipping 14 matching lines @@
       // Note: the cache-control header should be enough, but this doesn't hurt
       // and can help renew the policy after it expires.
       headers['ETag'] = segments[1];
     }
     return response.change(headers: headers);
   };
 }
 
 final _log = new Logger('dev_compiler');
 final _earlyErrorResult = new CheckerResults(const [], null, true);