Store the async-await compiled pub code directly in the repo.

tools/create_pub_snapshot.py

-#!/usr/bin/env python
-
-# Copyright (c) 2014 The Dart Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""
-This script runs the async/await compiler on pub and then compiles the output
-of that to a snapshot.
-
-Usage: create_pub_snapshot.py <dart> <compiler> <package root> <output dir>
-
-When #104 is fixed, this script is no longer needed. Instead, replace the
-generate_pub_snapshot action in utils/pub.gyp with:
-
-    'action': [
-      '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)dart<(EXECUTABLE_SUFFIX)',
-      '--package-root=<(PRODUCT_DIR)/pub_packages/',
-      '--snapshot=<(SHARED_INTERMEDIATE_DIR)/pub.dart.snapshot',
-      '../../sdk/lib/_internal/pub/bin/pub.dart',
-    ]
-"""
-
-import os
-import subprocess
-import sys
-
-
-def Main():
-  if len(sys.argv) < 5:
-    raise Exception("""Not enough arguments.
-
-Usage: create_pub_snapshot.py <dart> <compiler> <package root> <output file>""")
-
-  dart_path = sys.argv[1]
-  compiler = sys.argv[2]
-  package_root = sys.argv[3]
-  output_dir = sys.argv[4]
-
-  # Run the async compiler.
-  status = subprocess.call([
-    dart_path,
-    '--package-root=' + package_root,
-    compiler,
-    output_dir,
-    '--silent'
-  ])
-  if status != 0: return status
-
-  # Generate the snapshot from the output of that.
-  status = subprocess.call([
-    dart_path,
-    '--package-root=' + package_root,
-    '--snapshot=' + os.path.join(output_dir, 'pub.dart.snapshot'),
-    os.path.join(output_dir, 'pub_async/bin/pub.dart')
-  ])
-  if status != 0: return status
-
-
-if __name__ == '__main__':
-  sys.exit(Main())