Share the first error messages.

pkg/dart_messages/bin/publish.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';
-import 'dart:io';
+import 'dart:io' as io;
 
 import '../lib/shared_messages.dart';
 
 const String jsonPath = '../lib/generated/shared_messages.json';
 const String dart2jsPath =
     '../../compiler/lib/src/diagnostics/generated/shared_messages.dart';
 const String analyzerPath =
     '../../analyzer/lib/src/generated/generated/shared_messages.dart';
 
 final String dontEditWarning = """
@@ skipping 11 matching lines @@
 // 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.''';
 
 void markAsReadonly(String path) {
   // TODO(15078): mark as read-only. Currently not possible:
   // http://dartbug.com/15078.
 }
 
 void emitJson() {
   var input = MESSAGES;
-  var outPath = Platform.script.resolve(jsonPath).toFilePath();
+  var outPath = io.Platform.script.resolve(jsonPath).toFilePath();
   print("Emitting JSON:");
   print("  Input: ${input.length} entries");
   print("  Output: $outPath");
-  new File(outPath).writeAsStringSync(messagesAsJson);
+  new io.File(outPath).writeAsStringSync(messagesAsJson);
   print("Emitting JSON done.");
 }
 
 /// Escapes the given string [str].
 ///
 /// The parameter [str] may be `null` in which case the result is "null".
 String escapeString(String str) {
   return JSON.encode(str);
 }
 
@@ skipping 22 matching lines @@
 ///       EXAMPLE_MESSAGE: const MessageTemplate(
 ///         EXAMPLE_MESSAGE,
 ///         "Don't use #foo with #bar",
 ///         howToFix: "Just don't do it",
 ///         options: const ['--some-flag']),
 ///         examples: const ['''
 ///     some example with bad code;'''],
 ///     };
 void emitDart2js() {
   var input = MESSAGES;
-  var outPath = Platform.script.resolve(dart2jsPath).toFilePath();
+  var outPath = io.Platform.script.resolve(dart2jsPath).toFilePath();
   print("Emitting dart2js:");
   print("  Input: ${input.length} entries");
   print("  Output: $outPath");
 
-  var enumIds = input.keys.toList();
-
   StringBuffer out = new StringBuffer();
   out.writeln(copyrightHeader);
   out.writeln(dontEditWarning);
-  out.writeln("import '../messages.dart' show MessageTemplate;");
+  out.writeln("import '../messages.dart' show MessageKind, MessageTemplate;");
   out.writeln();
-  out.write(("enum SharedMessageKind {\n  "));
-  // We generate on one line on purpose, so that users are less likely to
-  // modify the generated file.
-  out.writeln(enumIds.join(",\n  "));
-  out.writeln("}");
-  out.writeln();
-  out.writeln("const Map<SharedMessageKind, MessageTemplate> TEMPLATES = "
-      "const <SharedMessageKind, MessageTemplate>{ ");
+  out.writeln("const Map<MessageKind, MessageTemplate> TEMPLATES = "
+      "const <MessageKind, MessageTemplate>{ ");
   input.forEach((name, message) {
-    out.writeln("  SharedMessageKind.$name: const MessageTemplate(");
+    if (!message.usedBy.contains(Platform.dart2js)) return;
+
+    out.writeln("  MessageKind.$name: const MessageTemplate(");
     // TODO(floitsch): include id.
-    out.writeln("    SharedMessageKind.$name,");
+    out.writeln("    MessageKind.$name,");
     out.write("    ");
     out.write(escapeString(message.template));
     if (message.howToFix != null) {
       out.write(",\n    howToFix: ${escapeString(message.howToFix)}");
     }
     if (message.options != null) {
       out.write(",\n    options: const [");
       out.write(message.options.map(escapeString).join(","));
       out.writeln("]");
     }
@@ skipping 14 matching lines @@
           out.write("      }");
         }
         out.writeln(",");
       }
       out.writeln("    ]");
     }
     out.writeln("  ),  // Generated. Don't edit.");
   });
   out.writeln("};");
 
-  new File(outPath).writeAsStringSync(out.toString());
+  new io.File(outPath).writeAsStringSync(out.toString());
   print("Emitting dart2js done.");
 }
 
 String convertToAnalyzerTemplate(String template, holeOrder) {
   var holeMap;
   if (holeOrder != null) {
     holeMap = {};
     for (int i = 0; i < holeOrder.length; i++) {
       holeMap[holeOrder[i]] = i;
     }
@@ skipping 21 matching lines @@
 /// All instances are stored as top-level const variables.
 ///
 /// A sample output looks as follows:
 ///
 ///     const FooCategoryErrorCode EXAMPLE_MESSAGE = const FooCategoryErrorCode(
 ///         "EXAMPLE_MESSAGE",
 ///         "Don't use {0} with {1}",
 ///         "Just don't do it");
 void emitAnalyzer() {
   var input = MESSAGES;
-  var outPath = Platform.script.resolve(analyzerPath).toFilePath();
+  var outPath = io.Platform.script.resolve(analyzerPath).toFilePath();
   print("Emitting analyzer:");
   print("  Input: ${input.length} entries");
   print("  Output: $outPath");
 
   StringBuffer out = new StringBuffer();
   out.writeln(copyrightHeader);
   out.writeln(dontEditWarning);
   out.writeln("import 'package:analyzer/src/generated/error.dart';");
-  out.writeln();
+  out.writeln("import 'package:analyzer/src/generated/parser.dart' "
+      "show ParserErrorCode;");
   input.forEach((name, message) {
+    if (!message.usedBy.contains(Platform.analyzer)) return;
+
     Category category = message.category;
     String className = category.name + "Code";
+    out.writeln();
     out.writeln("const $className $name = const $className(");
     out.writeln("    '$name',");
 
     String template = message.template;
     List holeOrder = message.templateHoleOrder;
     String analyzerTemplate = convertToAnalyzerTemplate(template, holeOrder);
     out.write("    ");
     out.write(escapeString(analyzerTemplate));
     out.write(",\n    ");
     out.write(escapeString(message.howToFix));
     out.writeln(");  // Generated. Don't edit.");
   });
 
-  new File(outPath).writeAsStringSync(out.toString());
+  new io.File(outPath).writeAsStringSync(out.toString());
   print("Emitting analyzer done.");
 }
 
 /// Translates the shared messages in `../lib/shared_messages.dart` to JSON,
 /// dart2js, and analyzer formats.
 ///
 /// Emits the json-output to [jsonPath], the dart2js-output to [dart2jsPath],
 /// and the analyzer-output to [analyzerPath].
 void main() {
   emitJson();
   emitDart2js();
   emitAnalyzer();
 }