Add multivm archive download script for buildbot use.

tools/dartium/download_multivm.py

Index: tools/dartium/download_multivm.py
diff --git a/tools/dartium/download_multivm.py b/tools/dartium/download_multivm.py
new file mode 100755
index 0000000000000000000000000000000000000000..fd86c623c94fa13802f809d06ff8d7287739b577
--- /dev/null
+++ b/tools/dartium/download_multivm.py
@@ -0,0 +1,60 @@
+#!/usr/bin/python
+
+# 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.
+
+"""Download archived multivm or dartium builds.
+
+  Usage: download_multivm.py revision target_directory
+"""
+
+import imp
+import os
+import platform
+import shutil
+import subprocess
+import sys
+
+# We are in [checkout dir]/src/dart/tools/dartium in a dartium/multivm checkout
+TOOLS_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+SRC_DIR = os.path.dirname(os.path.dirname(TOOLS_DIR))
+GS_BUCKET = 'gs://dartium-archive'
+if platform.system() == 'Windows':
+  GSUTIL = 'e:\\b\\build\\scripts\\slave\\gsutil.bat'
+else:
+  GSUTIL = '/b/build/scripts/slave/gsutil'
+if not os.path.exists(GSUTIL):
+  GSUTIL = 'gsutil'
+
+def ExecuteCommand(cmd):
+  print 'Executing: ' + ' '.join(cmd)
+  subprocess.check_output(cmd)
+
+def main():
+  revision = sys.argv[1]
+  target_dir = sys.argv[2]
+  archive_dir = (os.environ['BUILDBOT_BUILDERNAME']
+                   .replace('linux', 'lucid64')
+                   .replace('multivm', 'multivm-dartium'))
+  utils = imp.load_source('utils', os.path.join(TOOLS_DIR, 'utils.py'))
+  with utils.TempDir() as temp_dir:
+    archive_file = archive_dir + '-' + revision + '.zip'
+    gs_source = '/'.join([GS_BUCKET, archive_dir, archive_file])
+    zip_file = os.path.join(temp_dir, archive_file)
+    ExecuteCommand([GSUTIL, 'cp', gs_source, zip_file])
+
+    unzip_dir = zip_file.replace('.zip', '')
+    if platform.system() == 'Windows':
+      executable = os.path.join(SRC_DIR, 'third_party', 'lzma_sdk',
+                                'Executable', '7za.exe')
+      ExecuteCommand([executable, 'x', '-aoa', '-o' + temp_dir, zip_file])
+    else:
+      ExecuteCommand(['unzip', zip_file, '-d', temp_dir])
+
+    if os.path.exists(target_dir):
+      shutil.rmtree(target_dir)
+    shutil.move(unzip_dir, target_dir)
+
+if __name__ == '__main__':
+  sys.exit(main())