Support multiple categories per message.

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' as io;
 
 import '../lib/shared_messages.dart';
 
 const String jsonPath = '../lib/generated/shared_messages.json';
@@ skipping 154 matching lines @@
       if (index == null) {
         throw "Couldn't find hole-position for $holeName $holeMap";
       }
       return "{$index}";
     } else {
       return "{${seenHoles++}}";
     }
   });
 }
 
+String camlToAllCaps(String input) {
+  StringBuffer out = new StringBuffer();
+  for (int i = 0; i < input.length; i++) {
+    String c = input[i];
+    if (c.toUpperCase() == c) {
+      out.write("_$c");
+    } else {
+      out.write(c.toUpperCase());
+    }
+  }
+  return out.toString();
+}
+
 /// Emits the messages in analyzer format.
 ///
 /// Messages are encoded as instances of `ErrorCode` classes where the
 /// corresponding class is given by the `category` field of the Message.
 ///
 /// 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 = 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("import 'package:analyzer/src/generated/parser.dart' "
       "show ParserErrorCode;");
   input.forEach((name, message) {
     if (!message.usedBy.contains(Platform.analyzer)) return;
+    List<Category> categories = message.categories;
+    bool hasMultipleCategories = categories.length != 1;
+    for (Category category in categories) {
+      String className = category.name + "Code";
+      String analyzerName =
+          hasMultipleCategories ? "$name${camlToAllCaps(category.name)}" : name;
+      out.writeln();
+      out.writeln("const $className $analyzerName = const $className(");
+      out.writeln("    '$name',");
 
-    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.");
+      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 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();
 }