Remove code that requires whole-program compile

lib/src/server/server.dart

Index: lib/src/server/server.dart
diff --git a/lib/src/server/server.dart b/lib/src/server/server.dart
deleted file mode 100644
index 2a826a22f70cc963b210eba6be7277eccfb4dd90..0000000000000000000000000000000000000000
--- a/lib/src/server/server.dart
+++ /dev/null
@@ -1,339 +0,0 @@
-// 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.
-
-/// Development server that compiles Dart to JS on the fly.
-
-import 'dart:async';
-import 'dart:convert';
-import 'dart:io';
-
-import 'package:analyzer/file_system/file_system.dart' show ResourceUriResolver;
-import 'package:analyzer/file_system/memory_file_system.dart';
-import 'package:analyzer/src/generated/engine.dart'
-    show AnalysisContext, ChangeSet;
-import 'package:analyzer/src/generated/error.dart';
-import 'package:analyzer/src/generated/source.dart';
-import 'package:logging/logging.dart' show Level, Logger, LogRecord;
-import 'package:path/path.dart' as path;
-import 'package:shelf/shelf.dart' as shelf;
-import 'package:shelf/shelf_io.dart' as shelf;
-import 'package:shelf_static/shelf_static.dart' as shelf_static;
-
-import '../codegen/code_generator.dart' show CodeGenerator;
-import '../codegen/html_codegen.dart' show generateEntryHtml;
-import '../codegen/js_codegen.dart';
-import '../report/html_reporter.dart' show HtmlReporter;
-import '../analysis_context.dart';
-import '../compiler.dart' show AbstractCompiler, createErrorReporter;
-import '../info.dart'
-    show AnalyzerMessage, CheckerResults, LibraryInfo, LibraryUnit;
-import '../options.dart';
-import '../report.dart';
-import '../utils.dart';
-
-import 'dependency_graph.dart';
-
-/// Encapsulates the logic when the compiler is run as a development server.
-class ServerCompiler extends AbstractCompiler {
-  SourceNode _entryNode;
-  List<LibraryInfo> _libraries = <LibraryInfo>[];
-  final _generators = <CodeGenerator>[];
-  bool _hashing;
-  bool _failure = false;
-
-  factory ServerCompiler(AnalysisContext context, CompilerOptions options,
-      {AnalysisErrorListener reporter}) {
-    var srcOpts = options.sourceOptions;
-    var inputFiles = options.inputs;
-    var inputUris = inputFiles.map((String inputFile) =>
-        inputFile.startsWith('dart:') || inputFile.startsWith('package:')
-            ? Uri.parse(inputFile)
-            : new Uri.file(path.absolute(srcOpts.useImplicitHtml
-                ? SourceResolverOptions.implicitHtmlFile
-                : inputFile)));
-    var graph = new SourceGraph(context, reporter, options);
-    var entryNodes =
-        inputUris.map((inputUri) => graph.nodeFromUri(inputUri)).toList();
-
-    return new ServerCompiler._(context, options, reporter, graph, entryNodes);
-  }
-
-  ServerCompiler._(
-      AnalysisContext context,
-      CompilerOptions options,
-      AnalysisErrorListener reporter,
-      SourceGraph graph,
-      List<SourceNode> entryNodes)
-      : super(context, options, reporter) {
-    _entryNode = entryNodes.length == 1
-        ? entryNodes.first
-        : new EntryNode(graph, new Uri.file(inputBaseDir), entryNodes);
-
-    if (outputDir != null) {
-      _generators.add(new JSGenerator(this));
-    }
-    // TODO(sigmund): refactor to support hashing of the dart output?
-    _hashing = options.enableHashing && _generators.length == 1;
-  }
-
-  CheckerResults run() {
-    var clock = new Stopwatch()..start();
-
-    // TODO(sigmund): we are missing a couple failures here. The
-    // dependency_graph now detects broken imports or unsupported features
-    // like more than one script tag (see .severe messages in
-    // dependency_graph.dart). Such failures should be reported back
-    // here so we can mark failure=true in the CheckerResults.
-    rebuild(_entryNode, _buildSource);
-    clock.stop();
-    var time = (clock.elapsedMilliseconds / 1000).toStringAsFixed(2);
-    _log.fine('Compiled ${_libraries.length} libraries in ${time} s\n');
-    return new CheckerResults(
-        _libraries, _failure || options.codegenOptions.forceCompile);
-  }
-
-  bool _buildSource(SourceNode node) {
-    node.clearSummary();
-    if (node is HtmlSourceNode) {
-      _buildHtmlFile(node);
-    } else if (node is DartSourceNode) {
-      _buildDartLibrary(node);
-    } else if (node is ResourceSourceNode) {
-      _buildResourceFile(node);
-    } else {
-      assert(false); // should not get a build request on PartSourceNode
-    }
-
-    // TODO(sigmund): don't always return true.
-    // Use summaries to determine when rebuilding is needed.
-    return true;
-  }
-
-  void _buildHtmlFile(HtmlSourceNode node) {
-    if (outputDir == null) return;
-    var output = generateEntryHtml(node, this);
-    if (output == null) {
-      _failure = true;
-      return;
-    }
-
-    var filepath =
-        resourceOutputPath(node.uri, _entryNode.uri, options.runtimeDir);
-    String outputFile = path.join(outputDir, filepath);
-    new File(outputFile)
-      ..createSync(recursive: true)
-      ..writeAsStringSync(output);
-  }
-
-  void _buildResourceFile(ResourceSourceNode node) {
-    // ResourceSourceNodes files that just need to be copied over to the output
-    // location. These can be external dependencies or pieces of the
-    // dev_compiler runtime.
-    if (outputDir == null) return;
-    var filepath =
-        resourceOutputPath(node.uri, _entryNode.uri, options.runtimeDir);
-    assert(filepath != null);
-    filepath = path.join(outputDir, filepath);
-    var dir = path.dirname(filepath);
-    new Directory(dir).createSync(recursive: true);
-    new File.fromUri(node.source.uri).copySync(filepath);
-    if (_hashing) node.cachingHash = computeHashFromFile(filepath);
-  }
-
-  void _buildDartLibrary(DartSourceNode node) {
-    print('Compiling ${node.uri}');
-    var source = node.source;
-    // TODO(sigmund): find out from analyzer team if there is a better way
-    context.applyChanges(new ChangeSet()..changedSource(source));
-    var entryUnit = context.resolveCompilationUnit2(source, source);
-    var lib = entryUnit.element.enclosingElement;
-    if (!options.checkSdk && lib.source.isInSystemLibrary) return;
-    var current = node.info;
-    if (current != null) {
-      assert(current.library == lib);
-    } else {
-      node.info = current = new LibraryInfo(lib);
-    }
-    _libraries.add(current);
-
-    var resolvedParts = node.parts
-        .map((p) => context.resolveCompilationUnit2(p.source, source))
-        .toList(growable: false);
-    var libraryUnit = new LibraryUnit(entryUnit, resolvedParts);
-    bool failureInLib = false;
-    for (var unit in libraryUnit.libraryThenParts) {
-      var unitSource = unit.element.source;
-      // TODO(sigmund): integrate analyzer errors with static-info (issue #6).
-      failureInLib = computeErrors(unitSource) || failureInLib;
-    }
-    if (failureInLib) {
-      _failure = true;
-      if (!options.codegenOptions.forceCompile) return;
-    }
-
-    for (var cg in _generators) {
-      var hash = cg.generateLibrary(libraryUnit);
-      if (_hashing) node.cachingHash = hash;
-    }
-  }
-
-  void _runAgain() {
-    var clock = new Stopwatch()..start();
-    _libraries = <LibraryInfo>[];
-    int changed = 0;
-
-    // TODO(sigmund): propagate failures here (see TODO in run).
-    rebuild(_entryNode, (n) {
-      changed++;
-      return _buildSource(n);
-    });
-    clock.stop();
-    if (changed > 0) _dumpInfoIfRequested();
-    var time = (clock.elapsedMilliseconds / 1000).toStringAsFixed(2);
-    _log.fine("Compiled ${changed} libraries in ${time} s\n");
-  }
-
-  _dumpInfoIfRequested() {
-    var reporter = this.reporter;
-    if (reporter is HtmlReporter) {
-      reporter.finish(options);
-    } else if (reporter is SummaryReporter) {
-      var result = reporter.result;
-      if (outputDir != null) {
-        var filepath = path.join(outputDir, 'messages.json');
-        new File(filepath).writeAsStringSync(JSON.encode(result.toJsonMap()));
-      } else {
-        print(summaryToString(result));
-      }
-    }
-  }
-}
-
-class DevServer {
-  final ServerCompiler compiler;
-  final String outDir;
-  final String host;
-  final int port;
-  final String _entryPath;
-
-  factory DevServer(CompilerOptions options) {
-    assert(options.inputs.isNotEmpty);
-
-    var fileResolvers = createFileResolvers(options.sourceOptions);
-    if (options.sourceOptions.useImplicitHtml) {
-      fileResolvers.insert(0, _createImplicitEntryResolver(options.inputs[0]));
-    }
-
-    var context = createAnalysisContextWithSources(options.sourceOptions,
-        fileResolvers: fileResolvers);
-
-    var entryPath = path.basename(options.inputs[0]);
-    var extension = path.extension(entryPath);
-    if (extension != '.html' && !options.sourceOptions.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.codegenOptions.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 reporter = createErrorReporter(context, options);
-    var compiler = new ServerCompiler(context, options, reporter: reporter);
-    return new DevServer._(compiler, outDir, host, port, entryPath);
-  }
-
-  DevServer._(ServerCompiler compiler, this.outDir, this.host, this.port,
-      String entryPath)
-      : this.compiler = compiler,
-        // TODO(jmesserly): this logic is duplicated in a few places
-        this._entryPath = compiler.options.sourceOptions.useImplicitHtml
-            ? SourceResolverOptions.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 generatedHandler =
-        shelf_static.createStaticHandler(outDir, defaultDocument: _entryPath);
-    var sourceHandler = shelf_static.createStaticHandler(compiler.inputBaseDir,
-        serveFilesOutsidePath: true);
-    // TODO(vsm): Is there a better builtin way to compose these handlers?
-    var topLevelHandler = (shelf.Request request) {
-      // Prefer generated code
-      var response = generatedHandler(request);
-      if (response.statusCode == 404) {
-        // Fall back on original sources
-        response = sourceHandler(request);
-      }
-      return response;
-    };
-
-    var handler = const shelf.Pipeline()
-        .addMiddleware(rebuildAndCache)
-        .addHandler(topLevelHandler);
-    await shelf.serve(handler, host, port);
-    print('Serving $_entryPath at http://$host:$port/');
-    // Give the compiler a head start. This is not needed for correctness,
-    // but will likely speed up the first load. Regardless of whether compile
-    // succeeds we should still start the server.
-    compiler.run();
-    // Server has started so this future will complete.
-  }
-
-  shelf.Handler rebuildAndCache(shelf.Handler handler) => (request) {
-        // Trigger recompile only when requesting the HTML page.
-        var segments = request.url.pathSegments;
-        bool isEntryPage = segments.length == 0 || segments[0] == _entryPath;
-        if (isEntryPage) compiler._runAgain();
-
-        // To help browsers cache resources that don't change, we serve these
-        // resources by adding a query parameter containing their hash:
-        //    /{path-to-file.js}?____cached={hash}
-        var hash = request.url.queryParameters['____cached'];
-        var response = handler(request);
-        var policy = hash != null ? 'max-age=${24 * 60 * 60}' : 'no-cache';
-        var headers = {'cache-control': policy};
-        if (hash != null) {
-          // 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);
-      };
-}
-
-UriResolver _createImplicitEntryResolver(String entryPath) {
-  var entry = path.toUri(path.absolute(SourceResolverOptions.implicitHtmlFile));
-  var src = path.toUri(path.absolute(entryPath));
-  var provider = new MemoryResourceProvider();
-  provider.newFile(
-      entry.path, '<body><script type="application/dart" src="$src"></script>');
-  return new _ExistingSourceUriResolver(new ResourceUriResolver(provider));
-}
-
-/// A UriResolver that continues to the next one if it fails to find an existing
-/// source file. This is unlike normal URI resolvers, that always return
-/// something, even if it is a non-existing file.
-class _ExistingSourceUriResolver implements UriResolver {
-  final UriResolver resolver;
-  _ExistingSourceUriResolver(this.resolver);
-
-  Source resolveAbsolute(Uri uri, [Uri actualUri]) {
-    var src = resolver.resolveAbsolute(uri, actualUri);
-    return src.exists() ? src : null;
-  }
-
-  Uri restoreAbsolute(Source source) => resolver.restoreAbsolute(source);
-}
-
-final _log = new Logger('dev_compiler.src.server');
-final _earlyErrorResult = new CheckerResults(const [], true);