Introduce "platform configurations" to replace categories and libraries.dart.

tools/create_sdk.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2012, 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.
 #
 # A script which will be invoked from gyp to create an SDK.
 #
 # Usage: create_sdk.py sdk_directory
 #
@@ skipping 21 matching lines @@
 #...........dartdoc/
 #..............packages
 #.............resources/
 #.............templates/
 # ....include/
 # ......dart_api.h
 # ......dart_mirrors_api.h
 # ......dart_native_api.h
 # ......dart_tools_api.h
 # ....lib/
+# ......dart_client.platform
+# ......dart_server.platform
+# ......dart_shared.platform
+# ......dart2dart.platform
 # ......_internal/
 # ......async/
 # ......collection/
 # ......convert/
 # ......core/
 # ......html/
 # ......internal/
 # ......io/
 # ......isolate/
 # ......js/
@@ skipping 182 matching lines @@
                   join('indexed_db', 'dart2js'), join('indexed_db', 'dartium'),
                   'js', 'math', 'mirrors', 'typed_data',
                   join('svg', 'dart2js'), join('svg', 'dartium'),
                   join('web_audio', 'dart2js'), join('web_audio', 'dartium'),
                   join('web_gl', 'dart2js'), join('web_gl', 'dartium'),
                   join('web_sql', 'dart2js'), join('web_sql', 'dartium')]:
     copytree(join(HOME, 'sdk', 'lib', library), join(LIB, library),
              ignore=ignore_patterns('*.svn', 'doc', '*.py', '*.gypi', '*.sh',
                                     '.gitignore'))
 
+  # Copy the platform descriptors.
+  for file_name in ["dart_client.platform",
+                    "dart_server.platform",
+                    "dart_shared.platform",
+                    "dart2dart.platform"]:
+    copyfile(join(HOME, 'sdk', 'lib', file_name), join(LIB, file_name));
+
   # Copy libraries.dart to lib/_internal/libraries.dart for backwards
   # compatibility.
   #
   # TODO(sigmund): stop copying libraries.dart. Old versions (<=0.25.1-alpha.4)
   # of the analyzer package do not support the new location of this file. We
   # should be able to remove the old file once we release a newer version of
   # analyzer and popular frameworks have migrated to use it.
   copyfile(join(HOME, 'sdk', 'lib', '_internal',
                 'sdk_library_metadata', 'lib', 'libraries.dart'),
            join(LIB, '_internal', 'libraries.dart'))
@@ skipping 35 matching lines @@
       f.close()
 
   Copy(join(HOME, 'README.dart-sdk'), join(SDK_tmp, 'README'))
   Copy(join(HOME, 'LICENSE'), join(SDK_tmp, 'LICENSE'))
   Copy(join(HOME, 'sdk', 'api_readme.md'), join(SDK_tmp, 'lib', 'api_readme.md'))
 
   move(SDK_tmp, SDK)
 
 if __name__ == '__main__':
   sys.exit(Main())