[NaCl SDK] Update sdk_tools to 160493->174973. Also added script to make updating sdk_tools easier.

native_client_sdk/src/build_tools/update_sdktools.py

Index: native_client_sdk/src/build_tools/update_sdktools.py
diff --git a/native_client_sdk/src/build_tools/update_sdktools.py b/native_client_sdk/src/build_tools/update_sdktools.py
new file mode 100755
index 0000000000000000000000000000000000000000..95f08b85f739663de3ed2249ba37deed33d8d9eb
--- /dev/null
+++ b/native_client_sdk/src/build_tools/update_sdktools.py
@@ -0,0 +1,128 @@
+#!/usr/bin/env python
+# Copyright (c) 2012 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.
+
+"""Script that reads omahaproxy and gsutil to determine a version of the
+sdk_tools bundle to use.
+
+Please note the differences between this script and update_nacl_manifest.py:
+
+update_sdktools.py is run by a SDK-team developer to assist in updating to a
+new sdk_tools bundle. A file on the developer's hard drive is modified, and
+must be checked in for the new sdk_tools bundle to be used.
+
+update_nacl_manifest.py is customarily run by a cron job, and does not check in
+any changes. Instead it modifies the manifest file in commondatastorage."""
+
+
+import collections
+import difflib
+import json
+from manifest_util import DownloadAndComputeHash
+import optparse
+import re
+import sys
+from update_nacl_manifest import RealDelegate
+import urllib2
+
+
+SDK_TOOLS_DESCRIPTION_FORMAT = 'Native Client SDK Tools, revision %d'
+BUCKET_PATH = 'nativeclient-mirror/nacl/nacl_sdk/'
+GS_BUCKET_PATH = 'gs://' + BUCKET_PATH
+HTTPS_BUCKET_PATH = 'https://commondatastorage.googleapis.com/' + BUCKET_PATH
+
+
+def GetSdkToolsUrl(revision):
+  return HTTPS_BUCKET_PATH + 'trunk.%d/sdk_tools.tgz' % revision
+
+
+def GetTrunkRevisions(delegate):
+  urls = delegate.GsUtil_ls(GS_BUCKET_PATH)
+  revisions = []
+  for url in urls:
+    m = re.match(GS_BUCKET_PATH + 'trunk\.(\d+)', url)
+    if m:
+      revisions.append((int(m.group(1)), url))
+  return sorted(revisions)
+
+
+def FindMostRecentSdkTools(delegate):
+  for revision, url in reversed(GetTrunkRevisions(delegate)):
+    sdktools_url = url + 'sdk_tools.tgz'
+    if delegate.GsUtil_ls(sdktools_url):
+      return revision, sdktools_url
+  return None
+
+
+def JsonLoadFromString(json_string):
+  if sys.version_info > (2, 7):
+    return json.loads(json_string, object_pairs_hook=collections.OrderedDict)
+  else:
+    return json.loads(json_string)
+
+
+def GetBundleByName(bundles, name):
+  for bundle in bundles:
+    if bundle['name'] == name:
+      return bundle
+  return None
+
+
+def UpdateSdkToolsBundle(sdk_tools_bundle, revision, url, sha1, size):
+  sdk_tools_bundle['description'] = SDK_TOOLS_DESCRIPTION_FORMAT % revision
+  sdk_tools_bundle['revision'] = revision
+  # Update archive for each OS
+  for archive in sdk_tools_bundle['archives']:
+    archive['url'] = url
+    archive['checksum']['sha1'] = sha1
+    archive['size'] = size
+
+
+def UpdateManifest(manifest, revision):
+  sdk_tools_bundle = GetBundleByName(manifest['bundles'], 'sdk_tools')
+  url = GetSdkToolsUrl(revision)
+  sha1, size = DownloadAndComputeHash(urllib2.urlopen(url))
+  UpdateSdkToolsBundle(sdk_tools_bundle, revision, url, sha1, size)
+
+
+def UpdateManifestFileToRevision(filename, revision):
+  with open(filename) as stream:
+    manifest_string = stream.read()
+
+  manifest = JsonLoadFromString(manifest_string)
+  UpdateManifest(manifest, revision)
+  new_manifest_string = json.dumps(manifest, indent=2)
+
+  diff_string = ''.join(difflib.unified_diff(manifest_string.splitlines(1),
+                                             new_manifest_string.splitlines(1)))
+
+  print 'diff %s' % filename
+  print diff_string
+  print
+
+  with open(filename, 'w') as stream:
+    stream.write(new_manifest_string)
+
+
+def main(args):
+  parser = optparse.OptionParser()
+  parser.add_option('-r', '--revision',
+      help='set revision manually, rather than using the latest version')
+  options, args = parser.parse_args(args[1:])
+  if len(args) != 0:
+    parser.error('Unexpected args: %s' % ', '.join(args))
+
+  # TODO(binji): http://crbug.com/169047. Rename RealDelegate to something else.
+  delegate = RealDelegate()
+  if not options.revision:
+    revision, _ = FindMostRecentSdkTools(delegate)
+  else:
+    revision = int(options.revision)
+
+  UpdateManifestFileToRevision('json/naclsdk_manifest0.json', revision)
+  UpdateManifestFileToRevision('json/naclsdk_manifest2.json', revision)
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))