Add multivm archive download script for buildbot use.

tools/dartium/download_multivm.py

+#!/usr/bin/python
+
+# Copyright (c) 2014 The Chromium Authors. All rights reserved.

[ricow1, 2014/05/22 12:40:19]

use dart copyright notice?

[Bill Hesse, 2014/05/22 12:59:37]

Done.

+# 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 build_directory target_directory
+"""
+
+import os
+import platform
+import shutil
+import subprocess
+import sys
+
+BUILDER_NAME = 'BUILDBOT_BUILDERNAME'
+
+if platform.system() == 'Windows':
+  GSUTIL = 'e:\\b\\build\\scripts\\slave\\gsutil.bat'
+else:
+  GSUTIL = '/b/build/scripts/slave/gsutil'
+
+GS_SITE = 'gs://'
+GS_BUCKET = 'dartium-archive'
+# We are in [checkout dir]/src/dart/tools/dartium in a dartium/multivm checkout
+SRC_DIR = os.path.dirname(
+          os.path.dirname(
+          os.path.dirname(
+          os.path.dirname(__file__))))
+
+def DownloadArchive(bucket, revision, build_dir, target_dir):
+  dartium_bucket = bucket.replace('multivm', 'multivm-dartium')
+  dartium_archive = dartium_bucket + '-' + revision + '.zip'
+
+  source = '/'.join([GS_SITE + GS_BUCKET, dartium_bucket, dartium_archive])
+  zip_file = '/'.join([build_dir, dartium_archive])
+
+  if not os.path.exists(GSUTIL):
+    print('download_multivm.py must be run in a dartium or multivm checkout'
+          ' on a buildbot slave.  Could not find gsutil at %s' % GSUTIL)
+  cmd = [GSUTIL, 'cp', source, zip_file]
+  (status, output) = ExecuteCommand(cmd)
+  if status:
+    print output
+    return status
+  unzip_result_dir = zip_file.replace('.zip', '')
+  if os.path.exists(unzip_result_dir):
+    shutil.rmtree(unzip_result_dir)
+
+  if platform.system() == 'Windows':
+    executable = os.path.join(SRC_DIR, 'third_party', 'lzma_sdk',
+                              'Executable', '7za.exe')
+    cmd = [executable, 'x', '-aoa', '-o%s' % build_dir, zip_file]
+  else:
+    cmd = ['unzip', zip_file, '-d', build_dir]
+  (status, output) = ExecuteCommand(cmd)
+  if status:
+    print output
+    return status
+  os.remove(zip_file)
+  if os.path.exists(target_dir):
+    shutil.rmtree(target_dir)
+  shutil.move(zip_file.replace('.zip', ''), target_dir)
+  return 0
+
+
+def ExecuteCommand(cmd):
+  """Execute a command in a subprocess.
+  """
+  print 'Executing: ' + ' '.join(cmd)

[ricow1, 2014/05/22 12:40:19]

I suggest that we just use
subprocess.check_output
instead.

That will eliminate most of this function, and you can remove all of the if
status above.

[Bill Hesse, 2014/05/22 12:59:37]

Done.

+  try:
+    pipe = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    (output, error) = pipe.communicate()
+    if pipe.returncode != 0:
+      print 'Execution failed: ' + str(error)
+    return (pipe.returncode, output)
+  except:
+    import traceback
+    print 'Execution raised exception:', traceback.format_exc()
+    return (-1, '')
+
+def main():
+  revision = sys.argv[1]
+  build_dir = sys.argv[2]
+  target_dir = sys.argv[3]
+  bucket = os.environ[BUILDER_NAME].replace('linux', 'lucid64')
+  return DownloadArchive(bucket, revision, build_dir, target_dir)
+
+if __name__ == '__main__':
+  sys.exit(main())