Create html if needed in server mode

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 37 matching lines @@
   final TypeRules _rules;
   final CodeChecker _checker;
   final SourceGraph _graph;
   final SourceNode _entryNode;
   List<LibraryInfo> _libraries = <LibraryInfo>[];
   final List<CodeGenerator> _generators;
   final bool _hashing;
   bool _failure = false;
 
   factory Compiler(CompilerOptions options,
-      [TypeResolver resolver, CheckerReporter reporter]) {
+      {TypeResolver resolver, CheckerReporter reporter}) {
     if (resolver == null) {
       resolver = options.useMockSdk
           ? new TypeResolver.fromMock(mockSdkSources, options)
           : new TypeResolver.fromDir(options.dartSdkPath, options);
     }
 
     if (reporter == null) {
       reporter = options.dumpInfo
           ? new SummaryReporter()
           : new LogReporter(options.useColors);
     }
     var graph = new SourceGraph(resolver.context, reporter, options);
     var rules =
         new RestrictedRules(resolver.context.typeProvider, options: options);
     var checker = new CodeChecker(rules, reporter, options);
+
     var inputFile = options.entryPointFile;
-    var uri = inputFile.startsWith('dart:') || inputFile.startsWith('package:')
+    var inputUri = inputFile.startsWith('dart:') ||
+            inputFile.startsWith('package:')
         ? Uri.parse(inputFile)
-        : new Uri.file(path.absolute(inputFile));
-    var entryNode = graph.nodeFromUri(uri);
-
+        : new Uri.file(path.absolute(options.useImplicitHtml
+            ? ResolverOptions.implicitHtmlFile
+            : inputFile));
+    var entryNode = graph.nodeFromUri(inputUri);
     var outputDir = options.outputDir;
     var generators = <CodeGenerator>[];
     if (options.dumpSrcDir != null) {
       generators.add(new EmptyDartGenerator(
           options.dumpSrcDir, entryNode.uri, rules, options));
     }
     if (outputDir != null) {
       generators.add(options.outputDart
           ? new DartGenerator(outputDir, entryNode.uri, rules, options)
           : new JSGenerator(outputDir, entryNode.uri, rules, options));
@@ skipping 150 matching lines @@
 
 class CompilerServer {
   final Compiler compiler;
   final String outDir;
   final String host;
   final int port;
   final String _entryPath;
 
   factory CompilerServer(CompilerOptions options) {
     var entryPath = path.basename(options.entryPointFile);
-    if (path.extension(entryPath) != '.html') {
-      print('error: devc in server mode requires an HTML entry point.');
+    var extension = path.extension(entryPath);
+    if (extension != '.html' && !options.useImplicitHtml) {
+      print('error: devc in server mode requires an HTML or Dart entry point.');
       exit(1);
     }
 
     // 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;
     var compiler = new Compiler(options);
     return new CompilerServer._(compiler, outDir, host, port, entryPath);
   }
 
   CompilerServer._(
-      this.compiler, this.outDir, this.host, this.port, this._entryPath);
+      Compiler compiler, this.outDir, this.host, this.port, String entryPath)
+      : this.compiler = compiler,
+        this._entryPath = compiler._options.useImplicitHtml
+            ? ResolverOptions.implicitHtmlFile
+            : 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));
@@ skipping 20 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'] = hash;
     }
     return response.change(headers: headers);
   };
 }
 
 final _log = new Logger('dev_compiler');
 final _earlyErrorResult = new CheckerResults(const [], null, true);