Linter Demo

Errors: 1

Warnings: 4

File: /home/fstrocco/Dart/dart/benchmark/analyzer/lib/src/error_formatter.dart

// Copyright (c) 2013, 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. library error_formatter; import 'package:analyzer/src/analyzer_impl.dart'; import '../options.dart'; import 'generated/engine.dart'; import 'generated/error.dart'; import 'generated/source_io.dart'; /// Allows any [AnalysisError]. bool _anyError(AnalysisError error) => true; /// Returns `true` if [AnalysisError] should be printed. typedef bool _ErrorFilter(AnalysisError error); /** * Helper for formatting [AnalysisError]s. * The two format options are a user consumable format and a machine consumable format. */ class ErrorFormatter { final StringSink out; final CommandLineOptions options; final _ErrorFilter errorFilter; ErrorFormatter(this.out, this.options, [this.errorFilter = _anyError]); void formatError( Map<AnalysisError, LineInfo> errorToLine, AnalysisError error) { Source source = error.source; LineInfo_Location location = errorToLine[error].getLocation(error.offset); int length = error.length; ErrorSeverity severity = AnalyzerImpl.computeSeverity(error, options.enableTypeChecks); if (options.machineFormat) { if (severity == ErrorSeverity.WARNING && options.warningsAreFatal) { severity = ErrorSeverity.ERROR; } out.write(severity); out.write('|'); out.write(error.errorCode.type); out.write('|'); out.write(error.errorCode.name); out.write('|'); out.write(escapePipe(source.fullName)); out.write('|'); out.write(location.lineNumber); out.write('|'); out.write(location.columnNumber); out.write('|'); out.write(length); out.write('|'); out.write(escapePipe(error.message)); } else { String errorType = severity.displayName; if (error.errorCode.type == ErrorType.HINT || error.errorCode.type == ErrorType.LINT) { errorType = error.errorCode.type.displayName; } // [warning] 'foo' is not a... (/Users/.../tmp/foo.dart, line 1, col 2) out.write('[$errorType] ${error.message} '); out.write('(${source.fullName}'); out.write(', line ${location.lineNumber}, col ${location.columnNumber})'); } out.writeln(); } void formatErrors(List<AnalysisErrorInfo> errorInfos) { var errors = new List<AnalysisError>(); var errorToLine = new Map<AnalysisError, LineInfo>(); for (AnalysisErrorInfo errorInfo in errorInfos) { for (AnalysisError error in errorInfo.errors) { if (errorFilter(error)) { errors.add(error); errorToLine[error] = errorInfo.lineInfo; } } } // sort errors errors.sort((AnalysisError error1, AnalysisError error2) { // severity ErrorSeverity severity1 = AnalyzerImpl.computeSeverity(error1, options.enableTypeChecks); ErrorSeverity severity2 = AnalyzerImpl.computeSeverity(error2, options.enableTypeChecks); int compare = severity2.compareTo(severity1); if (compare != 0) { return compare; } // path compare = Comparable.compare(error1.source.fullName.toLowerCase(), error2.source.fullName.toLowerCase()); if (compare != 0) { return compare; } // offset return error1.offset - error2.offset; }); // format errors int errorCount = 0; int warnCount = 0; int hintCount = 0; int lintCount = 0; for (AnalysisError error in errors) { ErrorSeverity severity = AnalyzerImpl.computeSeverity(error, options.enableTypeChecks); if (severity == ErrorSeverity.ERROR) { errorCount++; } else if (severity == ErrorSeverity.WARNING) { if (options.warningsAreFatal) { errorCount++; } else { if (error.errorCode.type == ErrorType.HINT) { hintCount++; } else { warnCount++; } } } else if (error.errorCode.type == ErrorType.LINT) { lintCount++; } formatError(errorToLine, error); } // print statistics if (!options.machineFormat) { var hasErrors = errorCount != 0; var hasWarns = warnCount != 0; var hasHints = hintCount != 0; var hasLints = lintCount != 0; bool hasContent = false; if (hasErrors) { out.write(errorCount); out.write(' '); out.write(pluralize("error", errorCount)); hasContent = true; } if (hasWarns) { if (hasContent) { if (!hasHints && !hasLints) { out.write(' and '); } else { out.write(", "); } } out.write(warnCount); out.write(' '); out.write(pluralize("warning", warnCount)); hasContent = true; } if (hasHints) { if (hasContent) { if (!hasLints) { out.write(' and '); } else { out.write(", "); } } out.write(hintCount); out.write(' '); out.write(pluralize("hint", hintCount)); hasContent = true; } if (hasLints) { if (hasContent) { out.write(" and "); } out.write(lintCount); out.write(' '); out.write(pluralize("lint", lintCount)); hasContent = true; } if (hasContent) { out.writeln(" found."); } else { out.writeln("No issues found"); } } } static String escapePipe(String input) { var result = new StringBuffer(); for (var c in input.codeUnits) { if (c == '\\' || c == '|') { result.write('\\'); } result.writeCharCode(c); } return result.toString(); } static String pluralize(String word, int count) { if (count == 1) { return word; } else { return word + "s"; } } }