Add annotated steps script for validating that the version on dev and stable is always increasing w…

tools/bots/version_checker.py

+#!/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.
+
+import json
+import re
+import sys
+
+import bot
+import bot_utils
+
+utils = bot_utils.GetUtils()
+
+VERSION_BUILDER = r'version-checker'
+
+def VersionConfig(name, is_buildbot):
+  version_pattern = re.match(VERSION_BUILDER, name)
+  if not version_pattern:
+      return None
+  # We don't really use this, but we create it anyway to use the standard
+  # bot execution model.
+  return bot.BuildInfo('none', 'none', 'release', 'linux')
+
+def GetLatestVersionFromGCS(channel):
+  namer = bot_utils.GCSNamer(channel=channel)
+  gsutil = bot_utils.GSUtil()
+  gcs_version_path = namer.version_filepath('latest')
+  print 'Getting latest version from: %s' % gcs_version_path
+  version_json = gsutil.cat(gcs_version_path)
+  version_map = json.loads(version_json)
+  return version_map['version']
+
+def ValidateChannelVersion(latest_version, channel):
+  repo_version = utils.ReadVersionFile()
+  assert repo_version.channel == channel
+  if channel == bot_utils.Channel.STABLE:
+    assert int(repo_version.prerelease) == 0
+    assert int(repo_version.prerelease_patch) == 0
+
+  version_re = r'(\d+)\.(\d+)\.(\d+)(-dev\.(\d+)\.(\d+))?'
+
+  latest_match = re.match(version_re, latest_version)
+  latest_major = int(latest_match.group(1))
+  latest_minor = int(latest_match.group(2))
+  latest_patch = int(latest_match.group(3))
+  # We don't use these on stable.
+  latest_prerelease = int(latest_match.group(5) or 0)
+  latest_prerelease_patch = int(latest_match.group(6) or 0)
+
+  if latest_major < int(repo_version.major):
+    return True
+  if latest_minor < int(repo_version.minor):
+    return True
+  if latest_patch < int(repo_version.patch):
+    return True
+  if latest_prerelease < int(repo_version.prerelease):
+    return True
+  if latest_prerelease_patch < int(repo_version.prerelease_patch):
+    return True
+  return False
+
+def VersionSteps(build_info):
+  with bot.BuildStep('Version file sanity checking'):
+    bot_name, _ = bot.GetBotName()
+    channel = bot_utils.GetChannelFromName(bot_name)
+    if channel == bot_utils.Channel.BLEEDING_EDGE:
+      print 'No sanity checking on bleeding edge'
+    else:
+      assert (channel == bot_utils.Channel.STABLE or
+              channel == bot_utils.Channel.DEV)
+      latest_version = GetLatestVersionFromGCS(channel)
+      version = utils.GetVersion()
+      print 'Latests version on GCS: %s' % latest_version
+      print 'Version currently building: %s' % version
+      if not ValidateChannelVersion(latest_version, channel):
+        print "Validation failed"
+        sys.exit(1)
+      if latest_version == version:
+        print 'Version file has not been updated'
+        sys.exit(1)
+      else:
+        print 'Version file changed, sanity checks passed'
+
+if __name__ == '__main__':
+  # We pass in None for build_step to avoid building.
+  bot.RunBot(VersionConfig, VersionSteps, build_step=None)