Remove code that requires whole-program compile

lib/src/codegen/js_printer.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:convert' show JSON, JsonEncoder;
 import 'dart:io' show Directory, File, Platform, Process;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:path/path.dart' as path;
 import 'package:source_maps/source_maps.dart' as srcmaps show Printer;
 import 'package:source_maps/source_maps.dart' show SourceMapSpan;
 import 'package:source_span/source_span.dart' show SourceLocation;
 
 import '../js/js_ast.dart' as JS;
 import '../utils.dart' show FileSystem, computeHash, locationForOffset;
 
 import 'js_names.dart' show TemporaryNamer;
 
-String writeJsLibrary(
-    JS.Program jsTree, String outputPath, String inputDir, Uri serverUri,
+void writeJsLibrary(JS.Program jsTree, String outputPath, String inputDir,
     {bool emitSourceMaps: false,
     bool emitTypes: false,
     FileSystem fileSystem}) {
   var outFilename = path.basename(outputPath);
   var outDir = path.dirname(outputPath);
 
   JS.JavaScriptPrintingContext context;
   if (emitSourceMaps) {
     var printer = new srcmaps.Printer(outFilename);
-    context =
-        new SourceMapPrintingContext(printer, outDir, inputDir, serverUri);
+    context = new SourceMapPrintingContext(printer, outDir, inputDir, null);
   } else {
     context = new JS.SimpleJavaScriptPrintingContext();
   }
 
   var opts = new JS.JavaScriptPrintingOptions(
       emitTypes: emitTypes,
       allowKeywordsInProperties: true,
       allowSingleLineIfStatements: true);
   var jsNamer = new TemporaryNamer(jsTree);
   jsTree.accept(new JS.Printer(opts, context, localNamer: jsNamer));
@@ skipping 20 matching lines @@
     fileSystem.writeAsStringSync('$outputPath.map', '$sourceMapText\n');
   } else {
     text = (context as JS.SimpleJavaScriptPrintingContext).getText();
   }
   fileSystem.writeAsStringSync(outputPath, text);
   if (jsTree.scriptTag != null) {
     // Mark executable.
     // TODO(jmesserly): should only do this if the input file was executable?
     if (!Platform.isWindows) Process.runSync('chmod', ['+x', outputPath]);
   }
-
-  return computeHash(text);
 }
 
 class SourceMapPrintingContext extends JS.JavaScriptPrintingContext {
   final srcmaps.Printer printer;
   final String outputDir;
   final String inputDir;
 
-  // TODO(vsm): we could abstract this out and have a generic Uri mapping
-  // instead of hardcoding a notion of a server uri.
-  final Uri serverUri;
+  final Uri baseUri;
 
   CompilationUnit unit;
   Uri uri;
 
   SourceMapPrintingContext(
-      this.printer, this.outputDir, this.inputDir, this.serverUri);
+      this.printer, this.outputDir, this.inputDir, this.baseUri);
 
   void emit(String string) {
     printer.add(string);
   }
 
   AstNode _currentTopLevelDeclaration;
 
   void enterNode(JS.Node jsNode) {
     AstNode node = jsNode.sourceInformation;
     if (node == null || node.offset == -1) return;
@@ skipping 17 matching lines @@
       printer.mark(new SourceMapSpan(loc, end, name, isIdentifier: true));
     } else {
       printer.mark(loc);
     }
   }
 
   SourceLocation _location(int offset) =>
       locationForOffset(unit.lineInfo, uri, offset);
 
   Uri _makeRelativeUri(Uri src) {
-    if (serverUri == null) {
+    if (baseUri == null) {
       return new Uri(path: path.relative(src.path, from: outputDir));
     } else {
       if (src.path.startsWith('/')) {
-        return serverUri.resolve(path.relative(src.path, from: inputDir));
+        return baseUri.resolve(path.relative(src.path, from: inputDir));
       } else {
-        return serverUri.resolve(path.join('packages', src.path));
+        return baseUri.resolve(path.join('packages', src.path));
       }
     }
   }
 
   void exitNode(JS.Node jsNode) {
     AstNode node = jsNode.sourceInformation;
     if (unit == null || node == null || node.offset == -1) return;
 
     // TODO(jmesserly): in many cases marking the end will be unnecessary.
     printer.mark(_location(node.end));
 
     if (_currentTopLevelDeclaration == node) {
       unit = null;
       uri = null;
       _currentTopLevelDeclaration == null;
       return;
     }
   }
 
   String _getIdentifier(AstNode node) {
     if (node is SimpleIdentifier) return node.name;
     return null;
   }
 }