Add status_summary and current_summary to tools/gardening

tools/gardening/lib/status_summary.dart

Index: tools/gardening/lib/status_summary.dart
diff --git a/tools/gardening/lib/status_summary.dart b/tools/gardening/lib/status_summary.dart
new file mode 100644
index 0000000000000000000000000000000000000000..97c6bcd8e484aba64e33579e49bf53058454d207
--- /dev/null
+++ b/tools/gardening/lib/status_summary.dart
@@ -0,0 +1,110 @@
+// Copyright (c) 2017, 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.
+
+/// Collects the configurations for all status files in the 'tests' folder that
+/// mention one of the test names given as argument.
+
+import 'dart:async';
+import 'dart:math' hide log;
+import 'dart:io';
+
+import 'src/util.dart';
+
+main(List<String> args) async {
+  if (args.length == 0) {
+    print('Usage: status_summary <test-name1> [<test-name2> ...]');
+    exit(1);
+  }
+  int maxStatusWidth = 0;
+  int maxConfigWidth = 0;
+
+  List<Uri> statusFiles = await findStatusFiles('tests');
+  Map<String, List<StatusFile>> statusMap = <String, List<StatusFile>>{};
+  for (Uri uri in statusFiles) {
+    Map<String, StatusFile> currentMap = <String, StatusFile>{};
+    log('Scanning $uri');
+    String currentConfig = '';
+    for (String line in new File.fromUri(uri).readAsLinesSync()) {
+      if (line.startsWith('[')) {
+        currentConfig = line;
+      } else {
+        int colonIndex = line.indexOf(':');
+        if (colonIndex != -1) {
+          String testName = line.substring(0, colonIndex).trim();
+          int hashIndex = line.indexOf('#', colonIndex + 1);
+          String status;
+          String comment;
+          if (hashIndex != -1) {
+            status = line.substring(colonIndex + 1, hashIndex).trim();
+            comment = line.substring(hashIndex + 1).trim();
+          } else {
+            status = line.substring(colonIndex + 1).trim();
+            comment = '';
+          }
+
+          for (String arg in args) {
+            if (testName.contains(arg) || arg.contains(testName)) {

[karlklose, 2017/03/15 14:06:25]

Use startsWith like above?

[Johnni Winther, 2017/03/15 14:32:17]

That wouldn't support test names that include the test suite (searching for
language/arithmetic_test in the language.status file).

+              StatusFile statusFile =
+                  currentMap.putIfAbsent(testName, () => new StatusFile(uri));
+              statusFile.entries
+                  .add(new StatusEntry(currentConfig, status, comment));
+
+              maxStatusWidth = max(maxStatusWidth, status.length);
+              maxConfigWidth = max(maxConfigWidth, currentConfig.length);
+            }
+          }
+        }
+      }
+    }
+    currentMap.forEach((String testName, StatusFile configFile) {
+      statusMap.putIfAbsent(testName, () => <StatusFile>[]).add(configFile);
+    });
+  }
+  statusMap.forEach((String arg, List<StatusFile> statusFiles) {
+    print('$arg');
+    for (StatusFile statusFile in statusFiles) {
+      print('  ${statusFile.uri}');
+      statusFile.entries.forEach((StatusEntry entry) {
+        print('    ${padRight(entry.status, maxStatusWidth)}'
+            ' ${padRight(entry.config, maxConfigWidth)} ${entry.comment}');
+      });
+    }
+  });
+}
+
+/// Returns the [Uri]s for all `.status` files in [path] and subdirectories.
+Future<List<Uri>> findStatusFiles(String path) async {
+  List<Uri> statusFiles = <Uri>[];
+  await for (FileSystemEntity entity
+      in new Directory(path).list(recursive: true)) {
+    if (entity.path.endsWith('.status')) {
+      statusFiles.add(entity.uri);
+    }
+  }
+  return statusFiles;
+}
+
+/// The entries collected for a single status file.
+class StatusFile {
+  final Uri uri;
+  final List<StatusEntry> entries = <StatusEntry>[];
+
+  StatusFile(this.uri);
+}
+
+/// A single entry in a status file.
+class StatusEntry {
+  /// The preceding config line, i.e. `[...]` line that contained this entry.

[karlklose, 2017/03/15 14:06:25]

Add that it can be null (if it did not encounter a config line). 

[Johnni Winther, 2017/03/15 14:32:17]

It's will empty in that case. Added.

+  final String config;
+
+  /// The status of the entry, e.g. `Pass, Slow`.
+  final String status;
+
+  /// The comment after the status, if any.
+  final String comment;
+
+  StatusEntry(this.config, this.status, this.comment);
+
+  String toString() => '$status $config $comment';
+}