Check build status by parsing tryserver buildbot JSON.

tools/post_perf_builder_job.py

 # Copyright 2014 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.
 
 """Post a try job request via HTTP to the Tryserver to produce build."""
 
 import getpass
 import json
 import optparse
 import os
 import sys
 import urllib
 import urllib2
 
 # Link to get JSON data of builds
 BUILDER_JSON_URL = ('%(server_url)s/json/builders/%(bot_name)s/builds/'
                     '%(build_num)s?as_text=1&filter=0')
 
 # Link to display build steps
 BUILDER_HTML_URL = ('%(server_url)s/builders/%(bot_name)s/builds/%(build_num)s')
 
 # Tryserver buildbots status page
 TRY_SERVER_URL = 'http://build.chromium.org/p/tryserver.chromium'
 
 # Hostname of the tryserver where perf bisect builders are hosted. This is used
 # for posting build request to tryserver.
 BISECT_BUILDER_HOST = 'master4.golo.chromium.org'
 # 'try_job_port' on tryserver to post build request.
-BISECT_BUILDER_PORT = '8328'
+BISECT_BUILDER_PORT = 8328
 
 
 # From buildbot.status.builder.
 # See: http://docs.buildbot.net/current/developer/results.html
 SUCCESS, WARNINGS, FAILURE, SKIPPED, EXCEPTION, RETRY, TRYPENDING = range(7)
 
 # Status codes that can be returned by the GetBuildStatus method.
 OK = (SUCCESS, WARNINGS)
 # Indicates build failure.
 FAILED = (FAILURE, EXCEPTION, SKIPPED)
@@ skipping 187 matching lines @@
   Args:
     build_num: A build number on tryserver to determine its status.
     bot_name: Name of the bot where the build information is scanned.
     builder_host: Hostname of the server where the builder is hosted.
     builder_port: Port number of ther server where the builder is hosted.
 
   Returns:
     A tuple consists of build status (SUCCESS, FAILED or PENDING) and a link
     to build status page on the waterfall.
   """
-  # Gets the buildbot url for the given host and port.
-  server_url = _GetBuildBotUrl(builder_host, builder_port)
-  buildbot_url = BUILDER_JSON_URL % {'server_url': server_url,
-                                     'bot_name': bot_name,
-                                     'build_num': build_num
-                                    }
-  build_data = _GetBuildData(buildbot_url)
   results_url = None
-  if build_data:
-    # Link to build on the buildbot showing status of build steps.
-    results_url = BUILDER_HTML_URL % {'server_url': server_url,
-                                      'bot_name': bot_name,
-                                      'build_num': build_num
-                                     }
-    if _IsBuildFailed(build_data):
-      return (FAILED, results_url)
+  if build_num:
+    # Gets the buildbot url for the given host and port.
+    server_url = _GetBuildBotUrl(builder_host, builder_port)
+    buildbot_url = BUILDER_JSON_URL % {'server_url': server_url,
+                                       'bot_name': bot_name,
+                                       'build_num': build_num
+                                      }
+    build_data = _GetBuildData(buildbot_url)
+    if build_data:
+      # Link to build on the buildbot showing status of build steps.
+      results_url = BUILDER_HTML_URL % {'server_url': server_url,
+                                        'bot_name': bot_name,
+                                        'build_num': build_num
+                                       }
+      if _IsBuildFailed(build_data):
+        return (FAILED, results_url)
 
-    elif _IsBuildSuccessful(build_data):
-      return (OK, results_url)
+      elif _IsBuildSuccessful(build_data):
+        return (OK, results_url)
   return (PENDING, results_url)
 
 
 def GetBuildNumFromBuilder(build_reason, bot_name, builder_host, builder_port):
   """Gets build number on build status page for a given build reason.
 
   It parses the JSON data from buildbot page and collect basic information
   about the all the builds and then this uniquely identifies the build based
   on the 'reason' attribute in builds's JSON data.
   The 'reason' attribute set while a build request is posted, and same is used
@@ skipping 96 matching lines @@
   if not options.port:
     raise ServerAccessError('Please use the --port option to specify the try '
                             'server port to connect to.')
   params = _GetQueryParams(options)
   PostTryJob(params)
 
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv))