dart2dart: Test cases for better code coverage in dart_tree rewritings.

sdk/lib/_internal/compiler/implementation/dart2js_profile_many.dart

+// Copyright (c) 2014, 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 dart2js.profile_many;
+
+import 'dart2js.dart' as cmdline;
+import 'dart:async';
+
+const String USAGE =
+"""
+Usage: dart2js_profile_many.dart [OPTIONS] [FILES]
+
+Invokes dart2js separately for each file using the given options.
+This for profiling multiple compilations in the Dart Observatory.

[sigurdm, 2014/05/27 12:05:34]

This for => This is for

[asgerf, 2014/05/27 12:25:33]

Done.

+""";
+
+printUsage() {
+  print(USAGE);
+}
+
+void main(List<String> args) {
+
+  List options = [];
+  List files = [];
+
+  for (String arg in args) {
+    if (arg.startsWith('-')) {
+      options.add(arg);
+    } else {
+      files.add(arg);
+    }
+  }
+
+  if (files.length == 0) {
+    printUsage();
+    return;
+  }
+
+  cmdline.exitFunc = (code) {
+    throw "Exit with code $code";
+  };
+
+  compileFile(int index) {

[sigurdm, 2014/05/27 12:05:34]

Maybe iterating through the files and compiling each would be easier with
Future.forEach

[asgerf, 2014/05/27 12:25:33]

Much better, thanks.

+    if (index == files.length) {
+      print("Done");
+      return;
+    }
+    String file = files[index];
+    List subargs = [];
+    subargs.addAll(options);
+    subargs.add(file);
+    Future future = cmdline.compilerMain(subargs);
+    future.catchError((e) {  })
+          .then((_) { compileFile(index+1); });
+  }
+
+  compileFile(0);
+
+}