Parse escapes in analyzer machine output and handle Windows file names.

pkg/testing/lib/src/analyze.dart

 // Copyright (c) 2016, 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.md file.
 
 library testing.analyze;
 
 import 'dart:async' show Stream, Future;
 
 import 'dart:convert' show LineSplitter, UTF8;
 
@@ skipping 50 matching lines @@
   final Uri uri;
 
   final int line;
 
   final int startColumn;
 
   final int endColumn;
 
   final String message;
 
+  static final Pattern unescapePattern = new RegExp(r"\\(.)");
+
   AnalyzerDiagnostic(this.kind, this.detailedKind, this.code, this.uri,
       this.line, this.startColumn, this.endColumn, this.message);
 
   factory AnalyzerDiagnostic.fromLine(String line) {
-    List<String> parts = line.split("|");
+    List<String> parts = <String>[];
+    int start = 0;
+    int index = line.indexOf("|");
+    while (index != -1) {
+      if (index > 0 && line[index - 1] == "\\") {

[ahe, 2017/04/19 04:05:28]

This is not correct for cases like this:

\\|

+        index = line.indexOf("|", index + 1);
+      } else {
+        parts.add(line
+            .substring(start, index)
+            .replaceAllMapped(unescapePattern, (Match m) => m[1]));
+        start = index + 1;
+        index = line.indexOf("|", start);
+      }
+    }
+    parts.add(line
+        .substring(start)
+        .replaceAllMapped(unescapePattern, (Match m) => m[1]));
     if (parts.length != 8) {
-      throw "Malformed output: $line";
+      throw "Malformed output: $line $parts";
     }
     return new AnalyzerDiagnostic(
         parts[0],
         parts[1],
         parts[2],
-        Uri.base.resolve(parts[3]),
+        Uri.base.resolveUri(new Uri.file(parts[3])),
         int.parse(parts[4]),
         int.parse(parts[5]),
         int.parse(parts[6]),
         parts[7]);
   }
 
   String toString() {
-    return "$uri:$line:$startColumn: "
+    return "${uri.toFilePath()}:$line:$startColumn: "
         "${kind == 'INFO' ? 'warning: hint' : kind.toLowerCase()}:\n"
         "[$code] $message";
   }
 }
 
 Stream<AnalyzerDiagnostic> parseAnalyzerOutput(
     Stream<List<int>> stream) async* {
   Stream<String> lines =
       stream.transform(UTF8.decoder).transform(new LineSplitter());
   await for (String line in lines) {
@@ skipping 44 matching lines @@
       hasOutput = true;
       print(message);
     }
   }
   if (hasOutput) {
     throw "Non-empty output from analyzer.";
   }
   sw.stop();
   print("Running analyzer took: ${sw.elapsed}.");
 }