[NaCl SDK] The auto-updater should only mark one version as stable, everything

native_client_sdk/src/build_tools/update_nacl_manifest.py

 #!/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 version of SDK to put
 in manifest.
 """
 
 # pylint is convinced the email module is missing attributes
@@ skipping 461 matching lines @@
       channel: The stability of the pepper bundle, e.g. 'beta'
       archives: A sequence of archive URLs for this bundle."""
     self.versions_to_update.append((bundle_name, version, channel, archives))
 
   def Update(self, manifest):
     """Update a manifest and upload it.
 
     Args:
       manifest: The manifest used as a template for updating. Only pepper
       bundles that contain no archives will be considered for auto-updating."""
+    # Make sure there is only one stable branch: the one with the max version.
+    # All others are post-stable.
+    stable_major_versions = [SplitVersion(version)[0] for _, version, channel, _
+                             in self.versions_to_update if channel == 'stable']
+    # Add 0 in case there are no stable versions.
+    max_stable_version = max([0] + stable_major_versions)
+
     for bundle_name, version, channel, archives in self.versions_to_update:
       self.delegate.Print('Updating %s to %s...' % (bundle_name, version))
       bundle = manifest.GetBundle(bundle_name)
       for archive in archives:
         platform_bundle = self._GetPlatformArchiveBundle(archive)
         # Normally the manifest snippet's bundle name matches our bundle name.
         # pepper_canary, however is called "pepper_###" in the manifest
         # snippet.
         platform_bundle.name = bundle_name
         bundle.MergeWithBundle(platform_bundle)
-      bundle.stability = channel
+
+      major_version = SplitVersion(version)[0]
+      if major_version < max_stable_version and channel == 'stable':
+        bundle.stability = 'post_stable'
+      else:
+        bundle.stability = channel
       # We always recommend the stable version.
       if channel == 'stable':
         bundle.recommended = 'yes'
       else:
         bundle.recommended = 'no'
       manifest.MergeBundle(bundle)
     self._UploadManifest(manifest)
     self.delegate.Print('Done.')
 
   def _GetPlatformArchiveBundle(self, archive):
@@ skipping 154 matching lines @@
         raise
   except manifest_util.Error as e:
     if options.debug:
       raise
     print e
     sys.exit(1)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))