Build sdk.json without source-mirrors

site/try/build_sdk_json.dart

Index: site/try/build_sdk_json.dart
diff --git a/site/try/build_sdk_json.dart b/site/try/build_sdk_json.dart
new file mode 100644
index 0000000000000000000000000000000000000000..b46cc77ade65eb456df48c4c0104a4c9bd6e7b7e
--- /dev/null
+++ b/site/try/build_sdk_json.dart
@@ -0,0 +1,47 @@
+// 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.
+
+import 'dart:io';
+import 'dart:convert';
+import 'package:compiler/src/util/uri_extras.dart' show relativize;
+
+main(List<String> arguments) async {
+  if (arguments.length == 0) {
+    print('usage: jsonify.dart <out-path>');

[Harry Terkelsen, 2016/05/24 16:17:30]

usage: build_sdk_json.dart <out-path>

[Siggi Cherem (dart-lang), 2016/05/24 16:50:34]

Done.

+    exit(1);
+  }
+
+  var out = arguments[0];
+  List<Uri> sdkFiles = await collectSdkFiles();
+  new File(out).writeAsStringSync(emitSdkAsJson(sdkFiles));
+}
+
+Uri sdkRoot = Uri.base.resolveUri(Platform.script).resolve('../../');
+
+/// Collects a list of files that are part of the SDK.
+List<Uri> collectSdkFiles() {
+  var files = <Uri>[];
+  for (var entity in new
+    Directory.fromUri(sdkRoot.resolve('sdk/lib/')).listSync(recursive: true)) {

[Harry Terkelsen, 2016/05/24 16:17:30]

run dartfmt on this?

[Siggi Cherem (dart-lang), 2016/05/24 16:50:34]

Done. Split out subexpression to make it more readable too.

+    if (entity is File &&
+        (entity.path.endsWith('.dart') || entity.path.endsWith('.platform'))) {
+      files.add(entity.uri);
+    }
+  }
+  return files;
+}
+
+/// Creates a string that encodes the contents of the sdk libraries in json.
+///
+/// The keys of the json file are sdk-relative paths to source files, and the
+/// values are the contents of the file.
+String emitSdkAsJson(List<Uri> paths) {
+  var map = <String, String>{};
+  for (var uri in paths) {
+    String filename = relativize(sdkRoot, uri, false);

[Harry Terkelsen, 2016/05/24 16:17:30]

out of scope for this CL but the boolean flag for relativize should be a named
argument, since I have no idea what it does from reading this

[Siggi Cherem (dart-lang), 2016/05/24 16:50:34]

Agree - in the future we should also migrate to use package:path where it makes
sense... 

+    var contents = new File.fromUri(uri).readAsStringSync();
+    map['sdk:/$filename'] = contents;
+  }
+  return JSON.encode(map);
+}