pkg/analyzer/tool/messages/generate.dart - sdk.git - Git at Google

 /**
  * This file contains code to generate scanner and parser message
  * based on the information in pkg/front_end/messages.yaml.
  *
  * For each message in messages.yaml that contains an 'index:' field,
  * this tool generates an error with the name specified by the 'analyzerCode:'
  * field and an entry in the fastaAnalyzerErrorList for that generated error.
  * The text in the 'analyzerCode:' field must contain the name of the class
  * containing the error and the name of the error separated by a `.`
  * (e.g. ParserErrorCode.EQUALITY_CANNOT_BE_EQUALITY_OPERAND).
  *
  * It is expected that 'pkg/front_end/tool/fasta generate-messages'
  * has already been successfully run.
  */
 import 'dart:io';

 import 'package:analyzer/error/error.dart';
 import 'package:analysis_tool/tools.dart';
 import 'package:analyzer/src/dart/error/syntactic_errors.dart';
 import 'package:front_end/src/testing/package_root.dart' as pkgRoot;
 import 'package:front_end/src/fasta/scanner.dart';
 import 'package:path/path.dart';
 import 'package:yaml/yaml.dart' show loadYaml;

 main() async {
   String analyzerPkgPath = normalize(join(pkgRoot.packageRoot, 'analyzer'));
   String frontEndPkgPath = normalize(join(pkgRoot.packageRoot, 'front_end'));

   Map<dynamic, dynamic> messagesYaml = loadYaml(
       new File(join(frontEndPkgPath, 'messages.yaml')).readAsStringSync());
   String errorConverterSource = new File(join(analyzerPkgPath,
           joinAll(posix.split('lib/src/fasta/error_converter.dart'))))
       .readAsStringSync();
   String syntacticErrorsSource = new File(join(analyzerPkgPath,
           joinAll(posix.split('lib/src/dart/error/syntactic_errors.dart'))))
       .readAsStringSync();
   String parserSource = new File(join(frontEndPkgPath,
           joinAll(posix.split('lib/src/fasta/parser/parser.dart'))))
       .readAsStringSync();

   final codeGenerator = new _SyntacticErrorGenerator(
       messagesYaml, errorConverterSource, syntacticErrorsSource, parserSource);

   await GeneratedContent.generateAll(analyzerPkgPath, <GeneratedContent>[
     new GeneratedFile('lib/src/dart/error/syntactic_errors.g.dart',
         (String pkgPath) async {
       codeGenerator.generateFormatCode();
       return codeGenerator.out.toString();
     }),
   ]);

   codeGenerator
     ..checkForManualChanges()
     ..printSummary();
 }

 const invalidAnalyzerCode = """
 Error: Expected the text in the 'analyzerCode:' field to contain
        the name of the class containing the error
        and the name of the error separated by a `.`
        (e.g. ParserErrorCode.EQUALITY_CANNOT_BE_EQUALITY_OPERAND).
 """;

 const shouldRunFastaGenerateMessagesFirst = """
 Error: After modifying message.yaml, run this first:
        pkg/front_end/tool/fasta generate-messages
 """;

 /// Return an entry containing 2 strings,
 /// the name of the class containing the error and the name of the error,
 /// or throw an exception if 'analyzerCode:' field is invalid.
 List<String> nameForEntry(Map entry) {
   final analyzerCode = entry['analyzerCode'];
   if (analyzerCode is String) {
     if (!analyzerCode.startsWith('ParserErrorCode.')) {
       throw invalidAnalyzerCode;
     }
     List<String> name = analyzerCode.split('.');
     if (name.length != 2 || name[1].isEmpty) {
       throw invalidAnalyzerCode;
     }
     return name;
   }
   throw invalidAnalyzerCode;
 }

 class _SyntacticErrorGenerator {
   final Map messagesYaml;
   final String errorConverterSource;
   final String syntacticErrorsSource;
   final String parserSource;
   final translatedEntries = <Map>[];
   final translatedFastaErrorCodes = new Set<String>();
   final out = new StringBuffer('''
 //
 // THIS FILE IS GENERATED. DO NOT EDIT.
 //
 // Instead modify 'pkg/front_end/messages.yaml' and run
 // 'dart pkg/analyzer/tool/messages/generate.dart' to update.

 part of 'syntactic_errors.dart';

 ''');

   _SyntacticErrorGenerator(this.messagesYaml, this.errorConverterSource,
       this.syntacticErrorsSource, this.parserSource);

   void checkForManualChanges() {
     // Check for ParserErrorCodes that could be removed from
     // error_converter.dart now that those ParserErrorCodes are auto generated.
     int converterCount = 0;
     for (Map entry in translatedEntries) {
       final name = nameForEntry(entry);
       final errorCode = name[1];
       if (errorConverterSource.contains('"$errorCode"')) {
         if (converterCount == 0) {
           print('');
           print('The following ParserErrorCodes could be removed'
               ' from error_converter.dart:');
         }
         print('  $errorCode');
         ++converterCount;
       }
     }
     if (converterCount > 3) {
       print('  $converterCount total');
     }

     // Check that the public ParserErrorCodes have been updated
     // to reference the generated codes.
     int publicCount = 0;
     for (Map entry in translatedEntries) {
       final name = nameForEntry(entry);
       final errorCode = name[1];
       if (!syntacticErrorsSource.contains('_$errorCode')) {
         if (publicCount == 0) {
           print('');
           print('The following ParserErrorCodes should be updated'
               ' in syntactic_errors.dart');
           print('to reference the associated generated error code:');
         }
         print('  static const ParserErrorCode $errorCode = _$errorCode;');
         ++publicCount;
       }
     }

     // Fail if there are manual changes to be made, but do so
     // in a fire and forget manner so that the files are still generated.
     if (converterCount > 0 || publicCount > 0) {
       print('');
       throw 'Error: missing manual code changes';
     }
   }

   void generateErrorCodes() {
     final sortedErrorCodes = <String>[];
     final entryMap = <String, Map>{};
     for (var entry in translatedEntries) {
       final name = nameForEntry(entry);
       final errorCode = name[1];
       sortedErrorCodes.add(errorCode);
       if (entryMap[errorCode] == null) {
         entryMap[errorCode] = entry;
       } else {
         throw 'Error: Duplicate error code $errorCode';
       }
     }
     sortedErrorCodes.sort();
     for (var errorCode in sortedErrorCodes) {
       final entry = entryMap[errorCode];
       final className = nameForEntry(entry)[0];
       out.writeln();
       out.writeln('const $className _$errorCode =');
       out.writeln('const $className(');
       out.writeln("'$errorCode',");
       out.writeln('r"${entry['template']}"');
       final tip = entry['tip'];
       if (tip is String) {
         out.writeln(',correction: "$tip"');
       }
       out.writeln(');');
     }
   }

   void generateFastaAnalyzerErrorCodeList() {
     final sorted = new List<Map>(translatedEntries.length);
     for (var entry in translatedEntries) {
       var index = entry['index'];
       if (index is int && index >= 1 && index <= sorted.length) {
         if (sorted[index - 1] == null) {
           sorted[index - 1] = entry;
           continue;
         }
       }
       throw shouldRunFastaGenerateMessagesFirst;
     }
     out.writeln('final fastaAnalyzerErrorCodes = <ErrorCode>[null,');
     for (var entry in sorted) {
       List<String> name = nameForEntry(entry);
       out.writeln('_${name[1]},');
     }
     out.writeln('];');
   }

   void generateFormatCode() {
     messagesYaml.forEach((name, entry) {
       if (entry is Map) {
         if (entry['index'] is int && entry['analyzerCode'] is String) {
           translatedFastaErrorCodes.add(name);
           translatedEntries.add(entry);
         }
       }
     });
     generateFastaAnalyzerErrorCodeList();
     generateErrorCodes();
   }

   void printSummary() {
     // Build a map of error message to ParserErrorCode
     final messageToName = <String, String>{};
     for (ErrorCode errorCode in errorCodeValues) {
       if (errorCode is ParserErrorCode) {
         String message =
             errorCode.message.replaceAll(new RegExp(r'\{\d+\}'), '');
         messageToName[message] = errorCode.name;
       }
     }

     String messageFromEntryTemplate(Map entry) {
       String template = entry['template'];
       String message = template.replaceAll(new RegExp(r'#\w+'), '');
       return message;
     }

     // Remove entries that have already been translated
     for (Map entry in translatedEntries) {
       messageToName.remove(messageFromEntryTemplate(entry));
     }

     // Print the # of autogenerated ParserErrorCodes.
     print('${translatedEntries.length} of ${messageToName.length}'
         ' ParserErrorCodes generated.');

     // List the ParserErrorCodes that could easily be auto generated
     // but have not been already.
     final analyzerToFasta = new Map<String, List<String>>();
     messagesYaml.forEach((fastaName, entry) {
       if (entry is Map) {
         final analyzerName = messageToName[messageFromEntryTemplate(entry)];
         if (analyzerName != null) {
           analyzerToFasta
               .putIfAbsent(analyzerName, () => <String>[])
               .add(fastaName);
         }
       }
     });
     if (analyzerToFasta.isNotEmpty) {
       print('');
       print('The following ParserErrorCodes could be auto generated:');
       for (String analyzerName in analyzerToFasta.keys.toList()..sort()) {
         List<String> fastaNames = analyzerToFasta[analyzerName];
         if (fastaNames.length == 1) {
           print('  $analyzerName = ${fastaNames.first}');
         } else {
           print('  $analyzerName = $fastaNames');
         }
       }
       if (analyzerToFasta.length > 3) {
         print('  ${analyzerToFasta.length} total');
       }
     }

     // List error codes in the parser that have not been translated.
     final untranslatedFastaErrorCodes = new Set<String>();
     Token token = scanString(parserSource).tokens;
     while (!token.isEof) {
       if (token.isIdentifier) {
         String fastaErrorCode;
         String lexeme = token.lexeme;
         if (lexeme.length > 7) {
           if (lexeme.startsWith('message')) {
             fastaErrorCode = lexeme.substring(7);
           } else if (lexeme.length > 8) {
             if (lexeme.startsWith('template')) {
               fastaErrorCode = lexeme.substring(8);
             }
           }
         }
         if (fastaErrorCode != null &&
             !translatedFastaErrorCodes.contains(fastaErrorCode)) {
           untranslatedFastaErrorCodes.add(fastaErrorCode);
         }
       }
       token = token.next;
     }
     if (untranslatedFastaErrorCodes.isNotEmpty) {
       print('');
       print('The following error codes in the parser are not auto generated:');
       final sorted = untranslatedFastaErrorCodes.toList()..sort();
       for (String fastaErrorCode in sorted) {
         String analyzerCode = '';
         String template = '';
         var entry = messagesYaml[fastaErrorCode];
         if (entry is Map) {
           if (entry['index'] is! int && entry['analyzerCode'] is String) {
             analyzerCode = entry['analyzerCode'];
             template = entry['template'];
           }
         }
         print('  ${fastaErrorCode.padRight(30)} --> $analyzerCode'
             '\n      $template');
       }
     }
   }
 }
	/**
	* This file contains code to generate scanner and parser message
	* based on the information in pkg/front_end/messages.yaml.
	*
	* For each message in messages.yaml that contains an 'index:' field,
	* this tool generates an error with the name specified by the 'analyzerCode:'
	* field and an entry in the fastaAnalyzerErrorList for that generated error.
	* The text in the 'analyzerCode:' field must contain the name of the class
	* containing the error and the name of the error separated by a `.`
	* (e.g. ParserErrorCode.EQUALITY_CANNOT_BE_EQUALITY_OPERAND).
	*
	* It is expected that 'pkg/front_end/tool/fasta generate-messages'
	* has already been successfully run.
	*/
	import 'dart:io';

	import 'package:analyzer/error/error.dart';
	import 'package:analysis_tool/tools.dart';
	import 'package:analyzer/src/dart/error/syntactic_errors.dart';
	import 'package:front_end/src/testing/package_root.dart' as pkgRoot;
	import 'package:front_end/src/fasta/scanner.dart';
	import 'package:path/path.dart';
	import 'package:yaml/yaml.dart' show loadYaml;

	main() async {
	String analyzerPkgPath = normalize(join(pkgRoot.packageRoot, 'analyzer'));
	String frontEndPkgPath = normalize(join(pkgRoot.packageRoot, 'front_end'));

	Map<dynamic, dynamic> messagesYaml = loadYaml(
	new File(join(frontEndPkgPath, 'messages.yaml')).readAsStringSync());
	String errorConverterSource = new File(join(analyzerPkgPath,
	joinAll(posix.split('lib/src/fasta/error_converter.dart'))))
	.readAsStringSync();
	String syntacticErrorsSource = new File(join(analyzerPkgPath,
	joinAll(posix.split('lib/src/dart/error/syntactic_errors.dart'))))
	.readAsStringSync();
	String parserSource = new File(join(frontEndPkgPath,
	joinAll(posix.split('lib/src/fasta/parser/parser.dart'))))
	.readAsStringSync();

	final codeGenerator = new _SyntacticErrorGenerator(
	messagesYaml, errorConverterSource, syntacticErrorsSource, parserSource);

	await GeneratedContent.generateAll(analyzerPkgPath, <GeneratedContent>[
	new GeneratedFile('lib/src/dart/error/syntactic_errors.g.dart',
	(String pkgPath) async {
	codeGenerator.generateFormatCode();
	return codeGenerator.out.toString();
	}),
	]);

	codeGenerator
	..checkForManualChanges()
	..printSummary();
	}

	const invalidAnalyzerCode = """
	Error: Expected the text in the 'analyzerCode:' field to contain
	the name of the class containing the error
	and the name of the error separated by a `.`
	(e.g. ParserErrorCode.EQUALITY_CANNOT_BE_EQUALITY_OPERAND).
	""";

	const shouldRunFastaGenerateMessagesFirst = """
	Error: After modifying message.yaml, run this first:
	pkg/front_end/tool/fasta generate-messages
	""";

	/// Return an entry containing 2 strings,
	/// the name of the class containing the error and the name of the error,
	/// or throw an exception if 'analyzerCode:' field is invalid.
	List<String> nameForEntry(Map entry) {
	final analyzerCode = entry['analyzerCode'];
	if (analyzerCode is String) {
	if (!analyzerCode.startsWith('ParserErrorCode.')) {
	throw invalidAnalyzerCode;
	}
	List<String> name = analyzerCode.split('.');
	if (name.length != 2 \|\| name[1].isEmpty) {
	throw invalidAnalyzerCode;
	}
	return name;
	}
	throw invalidAnalyzerCode;
	}

	class _SyntacticErrorGenerator {
	final Map messagesYaml;
	final String errorConverterSource;
	final String syntacticErrorsSource;
	final String parserSource;
	final translatedEntries = <Map>[];
	final translatedFastaErrorCodes = new Set<String>();
	final out = new StringBuffer('''
	//
	// THIS FILE IS GENERATED. DO NOT EDIT.
	//
	// Instead modify 'pkg/front_end/messages.yaml' and run
	// 'dart pkg/analyzer/tool/messages/generate.dart' to update.

	part of 'syntactic_errors.dart';

	''');

	_SyntacticErrorGenerator(this.messagesYaml, this.errorConverterSource,
	this.syntacticErrorsSource, this.parserSource);

	void checkForManualChanges() {
	// Check for ParserErrorCodes that could be removed from
	// error_converter.dart now that those ParserErrorCodes are auto generated.
	int converterCount = 0;
	for (Map entry in translatedEntries) {
	final name = nameForEntry(entry);
	final errorCode = name[1];
	if (errorConverterSource.contains('"$errorCode"')) {
	if (converterCount == 0) {
	print('');
	print('The following ParserErrorCodes could be removed'
	' from error_converter.dart:');
	}
	print(' $errorCode');
	++converterCount;
	}
	}
	if (converterCount > 3) {
	print(' $converterCount total');
	}

	// Check that the public ParserErrorCodes have been updated
	// to reference the generated codes.
	int publicCount = 0;
	for (Map entry in translatedEntries) {
	final name = nameForEntry(entry);
	final errorCode = name[1];
	if (!syntacticErrorsSource.contains('_$errorCode')) {
	if (publicCount == 0) {
	print('');
	print('The following ParserErrorCodes should be updated'
	' in syntactic_errors.dart');
	print('to reference the associated generated error code:');
	}
	print(' static const ParserErrorCode $errorCode = _$errorCode;');
	++publicCount;
	}
	}

	// Fail if there are manual changes to be made, but do so
	// in a fire and forget manner so that the files are still generated.
	if (converterCount > 0 \|\| publicCount > 0) {
	print('');
	throw 'Error: missing manual code changes';
	}
	}

	void generateErrorCodes() {
	final sortedErrorCodes = <String>[];
	final entryMap = <String, Map>{};
	for (var entry in translatedEntries) {
	final name = nameForEntry(entry);
	final errorCode = name[1];
	sortedErrorCodes.add(errorCode);
	if (entryMap[errorCode] == null) {
	entryMap[errorCode] = entry;
	} else {
	throw 'Error: Duplicate error code $errorCode';
	}
	}
	sortedErrorCodes.sort();
	for (var errorCode in sortedErrorCodes) {
	final entry = entryMap[errorCode];
	final className = nameForEntry(entry)[0];
	out.writeln();
	out.writeln('const $className _$errorCode =');
	out.writeln('const $className(');
	out.writeln("'$errorCode',");
	out.writeln('r"${entry['template']}"');
	final tip = entry['tip'];
	if (tip is String) {
	out.writeln(',correction: "$tip"');
	}
	out.writeln(');');
	}
	}

	void generateFastaAnalyzerErrorCodeList() {
	final sorted = new List<Map>(translatedEntries.length);
	for (var entry in translatedEntries) {
	var index = entry['index'];
	if (index is int && index >= 1 && index <= sorted.length) {
	if (sorted[index - 1] == null) {
	sorted[index - 1] = entry;
	continue;
	}
	}
	throw shouldRunFastaGenerateMessagesFirst;
	}
	out.writeln('final fastaAnalyzerErrorCodes = <ErrorCode>[null,');
	for (var entry in sorted) {
	List<String> name = nameForEntry(entry);
	out.writeln('_${name[1]},');
	}
	out.writeln('];');
	}

	void generateFormatCode() {
	messagesYaml.forEach((name, entry) {
	if (entry is Map) {
	if (entry['index'] is int && entry['analyzerCode'] is String) {
	translatedFastaErrorCodes.add(name);
	translatedEntries.add(entry);
	}
	}
	});
	generateFastaAnalyzerErrorCodeList();
	generateErrorCodes();
	}

	void printSummary() {
	// Build a map of error message to ParserErrorCode
	final messageToName = <String, String>{};
	for (ErrorCode errorCode in errorCodeValues) {
	if (errorCode is ParserErrorCode) {
	String message =
	errorCode.message.replaceAll(new RegExp(r'\{\d+\}'), '');
	messageToName[message] = errorCode.name;
	}
	}

	String messageFromEntryTemplate(Map entry) {
	String template = entry['template'];
	String message = template.replaceAll(new RegExp(r'#\w+'), '');
	return message;
	}

	// Remove entries that have already been translated
	for (Map entry in translatedEntries) {
	messageToName.remove(messageFromEntryTemplate(entry));
	}

	// Print the # of autogenerated ParserErrorCodes.
	print('${translatedEntries.length} of ${messageToName.length}'
	' ParserErrorCodes generated.');

	// List the ParserErrorCodes that could easily be auto generated
	// but have not been already.
	final analyzerToFasta = new Map<String, List<String>>();
	messagesYaml.forEach((fastaName, entry) {
	if (entry is Map) {
	final analyzerName = messageToName[messageFromEntryTemplate(entry)];
	if (analyzerName != null) {
	analyzerToFasta
	.putIfAbsent(analyzerName, () => <String>[])
	.add(fastaName);
	}
	}
	});
	if (analyzerToFasta.isNotEmpty) {
	print('');
	print('The following ParserErrorCodes could be auto generated:');
	for (String analyzerName in analyzerToFasta.keys.toList()..sort()) {
	List<String> fastaNames = analyzerToFasta[analyzerName];
	if (fastaNames.length == 1) {
	print(' $analyzerName = ${fastaNames.first}');
	} else {
	print(' $analyzerName = $fastaNames');
	}
	}
	if (analyzerToFasta.length > 3) {
	print(' ${analyzerToFasta.length} total');
	}
	}

	// List error codes in the parser that have not been translated.
	final untranslatedFastaErrorCodes = new Set<String>();
	Token token = scanString(parserSource).tokens;
	while (!token.isEof) {
	if (token.isIdentifier) {
	String fastaErrorCode;
	String lexeme = token.lexeme;
	if (lexeme.length > 7) {
	if (lexeme.startsWith('message')) {
	fastaErrorCode = lexeme.substring(7);
	} else if (lexeme.length > 8) {
	if (lexeme.startsWith('template')) {
	fastaErrorCode = lexeme.substring(8);
	}
	}
	}
	if (fastaErrorCode != null &&
	!translatedFastaErrorCodes.contains(fastaErrorCode)) {
	untranslatedFastaErrorCodes.add(fastaErrorCode);
	}
	}
	token = token.next;
	}
	if (untranslatedFastaErrorCodes.isNotEmpty) {
	print('');
	print('The following error codes in the parser are not auto generated:');
	final sorted = untranslatedFastaErrorCodes.toList()..sort();
	for (String fastaErrorCode in sorted) {
	String analyzerCode = '';
	String template = '';
	var entry = messagesYaml[fastaErrorCode];
	if (entry is Map) {
	if (entry['index'] is! int && entry['analyzerCode'] is String) {
	analyzerCode = entry['analyzerCode'];
	template = entry['template'];
	}
	}
	print(' ${fastaErrorCode.padRight(30)} --> $analyzerCode'
	'\n $template');
	}
	}
	}
	}