Docserver overhaul: Gitiles away from me.

chrome/common/extensions/docs/server2/environment.py

 # Copyright 2013 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 re
 import os
 import sys
 
 from app_yaml_helper import AppYamlHelper
 from third_party.json_schema_compiler.memoize import memoize
@@ skipping 13 matching lines @@
   # Not running on appengine, get it from the app.yaml file ourselves.
   app_yaml_path = os.path.join(os.path.split(__file__)[0], 'app.yaml')
   with open(app_yaml_path, 'r') as app_yaml:
     return AppYamlHelper.ExtractVersion(app_yaml.read())
 
 
 def _IsServerSoftware(name):
   return os.environ.get('SERVER_SOFTWARE', '').find(name) == 0
 
 
+def IsComputeEngine():
+  return _IsServerSoftware('Compute Engine')

[Ken Rockot(use gerrit already), 2015/05/26 00:26:24]

Not a real thing, but there were no obvious environment variables I could glean
to ask the question synchronously and quickly. So we manually set
SERVER_SOFTWARE='Compute Engine' on the instance in order to make this work.

+
+
 def IsDevServer():
   return _IsServerSoftware('Development')
 
 
 def IsReleaseServer():
   return _IsServerSoftware('Google App Engine')
 
 
 def IsPreviewServer():
   return sys.argv and os.path.basename(sys.argv[0]) == 'preview.py'
+
+
+def IsAppEngine():
+  return IsDevServer() or IsReleaseServer()
+
+
+def IsTest():
+  return sys.argv and os.path.basename(sys.argv[0]).endswith('_test.py')

[Ken Rockot(use gerrit already), 2015/05/26 00:26:24]

Added this because it's no longer true that !IsAppEngine() == (IsTest() ||
IsPreview())

+
+
+class UnknownEnvironmentError(Exception):
+  pass
+