Make the fuchsia mojo/public repo the source of truth.

mojo/public/tools/download_dart_snapshotter.py

-#!/usr/bin/env python
-# Copyright 2014 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-import argparse
-import os
-import subprocess
-import sys
-import tempfile
-import zipfile
-
-BINARY_FOR_PLATFORM = {
-    "linux-x64" : "dart_snapshotter",
-    "mac-x64": "dart_snapshotter",
-}
-
-CURRENT_PATH = os.path.dirname(os.path.realpath(__file__))
-sys.path.insert(0, os.path.join(CURRENT_PATH, "pylib"))
-import gs
-
-PREBUILT_FILE_PATH = os.path.join(CURRENT_PATH, "prebuilt", "dart_snapshotter")
-
-
-def download(tools_directory, version_file):
-  stamp_path = os.path.join(PREBUILT_FILE_PATH, "VERSION")
-
-  version_path = os.path.join(CURRENT_PATH, version_file)
-  with open(version_path) as version_file:
-    version = version_file.read().strip()
-
-  try:
-    with open(stamp_path) as stamp_file:
-      current_version = stamp_file.read().strip()
-      if current_version == version:
-        return 0  # Already have the right version.
-  except IOError:
-    pass  # If the stamp file does not exist we need to download new binaries.
-
-  if sys.platform.startswith("linux"):
-    platforms = ["linux-x64"]
-  elif sys.platform.startswith("darwin"):
-    platforms = ["mac-x64"]
-  else:
-    print "No prebuilt dart_snapshotter available for %s" % sys.platform
-    return 0
-
-  for platform in platforms:
-    download_version_for_platform(version, platform, tools_directory)
-
-  with open(stamp_path, 'w') as stamp_file:
-    stamp_file.write(version)
-  return 0
-
-def download_version_for_platform(version, platform, tools_directory):
-  find_depot_tools_path = os.path.join(CURRENT_PATH, tools_directory)
-  sys.path.insert(0, find_depot_tools_path)
-  # pylint: disable=F0401
-  import find_depot_tools
-  depot_tools_path = find_depot_tools.add_depot_tools_to_path()
-
-  basename = platform + ".zip"
-  gs_path = "gs://mojo/dart_snapshotter/" + version + "/" + basename
-
-  with tempfile.NamedTemporaryFile() as temp_zip_file:
-    gs.download_from_public_bucket(gs_path, temp_zip_file.name,
-                                   depot_tools_path)
-    binary_name = BINARY_FOR_PLATFORM[platform]
-    output_dir = os.path.join(PREBUILT_FILE_PATH, platform)
-    with zipfile.ZipFile(temp_zip_file.name) as z:
-      zi = z.getinfo(binary_name)
-      mode = zi.external_attr >> 16
-      z.extract(zi, output_dir)
-      os.chmod(os.path.join(output_dir, binary_name), mode)
-
-
-def main():
-  parser = argparse.ArgumentParser(
-      description="Download dart_snapshotter binaries from google storage")
-  parser.add_argument("--tools-directory",
-                      dest="tools_directory",
-                      metavar="<tools-directory>",
-                      type=str,
-                      required=True,
-                      help="Path to the directory containing "
-                           "find_depot_tools.py, specified as a relative path "
-                           "from the location of this file.")
-  parser.add_argument("--version-file",
-                      dest="version_file",
-                      metavar="<version-file>",
-                      type=str,
-                      default="../VERSION",
-                      help="Path to the file containing the version of the "
-                           "dart_snapshotter to be fetched, specified as a"
-                           "relative path from the location of this file "
-                           "(default: %(default)s).")
-  args = parser.parse_args()
-  return download(args.tools_directory, args.version_file)
-
-if __name__ == "__main__":
-  sys.exit(main())