Extension profile generator + benchmark for startup with profile.

tools/perf/profile_creators/update_remote_extensions.py

Index: tools/perf/profile_creators/update_remote_extensions.py
diff --git a/tools/perf/profile_creators/update_remote_extensions.py b/tools/perf/profile_creators/update_remote_extensions.py
new file mode 100644
index 0000000000000000000000000000000000000000..a62ec65df403c12684284ca4279efc59019e9c5f
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+++ b/tools/perf/profile_creators/update_remote_extensions.py
@@ -0,0 +1,207 @@
+# Copyright 2015 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 base64
+import csv
+import json
+import optparse
+import os
+import shutil
+import sys
+import tempfile
+import urllib2
+import zipfile
+
+sys.path.append(os.path.join(os.path.dirname(__file__), os.pardir, os.pardir,
+    'telemetry'))
+
+from catapult_base import cloud_storage
+from telemetry.core import exceptions
+
+# Remote target upload directory in cloud storage for extensions.
+REMOTE_DIR = 'extension_set'
+
+# Target zip file.
+ZIP_NAME = 'extensions.zip'
+
+
+def _DownloadCrxFromCws(ext_id, dst):
+  """Downloads CRX specified from Chrome Web Store.
+
+  Retrieves CRX (Chrome extension file) specified by ext_id from Chrome Web
+  Store, into directory specified by dst.
+
+  Args:
+      ext_id: id of extension to retrieve.
+      dst: directory to download CRX into
+
+  Returns:
+      Returns local path to downloaded CRX.
+      If download fails, return None.
+  """
+  dst_path = os.path.join(dst, '%s.crx' % ext_id)
+  cws_url = ('https://clients2.google.com/service/update2/crx?response='
+             'redirect&prodversion=38.0&x=id%%3D%s%%26installsource%%3D'
+             'ondemand%%26uc' % ext_id)
+  response = urllib2.urlopen(cws_url)
+  if response.getcode() is not 200:
+    return None
+  with open(dst_path, 'w') as f:
+    f.write(response.read())
+  return dst_path
+
+
+def _UpdateExtensionsInCloud(local_extensions_dir, extensions_csv, remote_dir):
+  """Updates set of extensions in Cloud Storage from a CSV of extension ids.
+
+  From well-formatted CSV file containing some set of extensions
+  (extensions_csv), download them, compress into archive, and update
+  the remote extension archive under REMOTE_DIR in CHROME-PARTNER-TELEMETRY
+  bucket. This script expects 2nd column of CSV file to contain extension ids.
+
+  Args:
+      local_extensions_dir: directory to download CRX files into.
+      extension_csv: CSV to pull extension_ids from.
+      remote_dir: remote directory to put extension archive in cloud storage.
+
+  Raises:
+      Exception if a CRX download fails.
+  """
+
+  # Download CRX to temp files and compress into archive
+  zip_path = os.path.join(local_extensions_dir, ZIP_NAME)
+  extension_zip = zipfile.ZipFile(zip_path, 'w')
+  update_csv = False
+  extensions_info = []
+  with open(extensions_csv, 'rb') as csv_file:
+    reader = csv.reader(csv_file)
+    # Stores comments (in case CSV needs to be updated/rewritten)
+    # and skips header line.
+    comments = []
+    line = ','.join(reader.next())
+    while line.startswith('#'):
+      comments.append(line)
+      line = ','.join(reader.next())
+    # Extract info from CSV.
+    for row in reader:
+      extension_info = {
+        'extension_name': row[0],
+        'id': row[1],
+        'hash': row[2],
+        'version': row[3]
+      }
+
+      print 'Fetching extension %s...' % extension_info['id']
+      crx_path = _DownloadCrxFromCws(extension_info['id'], local_extensions_dir)
+      if crx_path is None:
+        raise exceptions.Error('\tCould not fetch %s.\n\n'
+                               'If this extension dl consistently fails, '
+                               'remove this entry from %s.'
+                               % (extension_info['id'], extensions_csv))
+      (new_hash, new_version) = _CrxHashIfChanged(crx_path, extension_info)
+      if new_hash is not None:
+        update_csv = True
+        extension_info['hash'] =  new_hash
+        extension_info['version'] = new_version
+      extensions_info.append(extension_info)
+      extension_zip.write(crx_path, arcname='%s.crx' % extension_info['id'])
+  extension_zip.close()
+
+  if update_csv:
+    print 'Updating CSV...'
+    _UpdateCsv(comments, extensions_csv, extensions_info)
+
+  print 'Uploading extensions to cloud...'
+  remote_zip_path = os.path.join(remote_dir, ZIP_NAME)
+  cloud_storage.Insert(cloud_storage.PARTNER_BUCKET, remote_zip_path, zip_path)
+
+
+def _CrxHashIfChanged(crx_path, extension_info):
+  """Checks whether downloaded Crx has been altered.
+
+  Compares stored hash with hash of downloaded Crx. If different, alerts user
+  that CRX version has changed and will be updated in CSV file.
+
+  Args:
+    crx_path: Path to downloaded CRX.
+    extension_info: Info from CSV (including id and previous hash) about CRX.
+
+  Returns:
+    New hash and version if extension differed. Otherwise, returns (None, None)
+  """
+  downloaded_hash = _Base64Hash(crx_path)
+  new_version = _GetVersionFromCrx(crx_path)
+  if downloaded_hash != extension_info['hash']:
+    if new_version != extension_info['version']:
+      ans = raw_input('\tWarning: Extension %s version from Web Store differs '
+                      'from CSV version.\n\tIf continued, script will write '
+                      'new hash and version to CSV.\n\tContinue? (y/n) '
+                      % extension_info['id']).lower()
+    else:
+      raise exceptions.Error('Extension %s hash from Web Store differs from '
+                             '\nhash stored in CSV, but versions are the same.')
+    if not ans.startswith('y'):
+      sys.exit('Web Store extension %s hash differs from hash in CSV.'
+               % extension_info['id'])
+    return (downloaded_hash, new_version)
+  return (None, None)
+
+def _UpdateCsv(comments, extensions_csv, extensions_info):
+  """Updates CSV with information in extensions_info.
+
+  Original CSV is overwritten with updated information about each extension.
+  Header comments from original CSV are preserved.
+
+  Args:
+    comments: List containing lines of comments found in header of original CSV.
+    extensions_csv: Path to CSV file.
+    extensions_info: List of extension info to write to CSV. Each entry is
+        a dict containing fields extension_name, id, hash, and version.
+  """
+  # Maintain pre-existing comments.
+  with open(extensions_csv, 'w') as csv_file:
+    csv_file.write('\n'.join(comments))
+    csv_file.write('\n')
+  with open(extensions_csv, 'a') as csv_file:
+    writer = csv.DictWriter(
+        csv_file, fieldnames=['extension_name', 'id', 'hash', 'version'])
+    writer.writeheader()
+    writer.writerows(extensions_info)
+
+def _GetCsvFromArgs():
+  """Parse options to retrieve name of CSV file."""
+  parser = optparse.OptionParser()
+  parser.add_option('-e', '--extension-csv', dest='extension_csv',
+                   help='CSV of extensions to load.')
+  (options, _) = parser.parse_args()
+  if not options.extension_csv:
+    parser.error('Must specify --extension-csv option.')
+  return options.extension_csv
+
+def _GetVersionFromCrx(crx_path):
+  """Retrieves extension version from CRX archive.
+
+  Args:
+    crx_path: path to CRX archive to extract version from.
+  """
+  with zipfile.ZipFile(crx_path, 'r') as crx_zip:
+    manifest_contents = crx_zip.read('manifest.json')
+    version = json.loads(manifest_contents)['version']
+  return version
+
+def _Base64Hash(file_path):
+  return base64.b64encode(cloud_storage.CalculateHash(file_path))
+
+def main():
+  extension_csv = _GetCsvFromArgs()
+  local_extensions_dir = tempfile.mkdtemp()
+  try:
+    _UpdateExtensionsInCloud(local_extensions_dir,
+                             extension_csv, REMOTE_DIR)
+  finally:
+    shutil.rmtree(local_extensions_dir)
+
+if __name__ == '__main__':
+  main()
+