Adds bot_update to depot_tools.

infra/recipe_modules/hacky_tryserver_detection/api.py

Index: infra/recipe_modules/hacky_tryserver_detection/api.py
diff --git a/infra/recipe_modules/hacky_tryserver_detection/api.py b/infra/recipe_modules/hacky_tryserver_detection/api.py
new file mode 100644
index 0000000000000000000000000000000000000000..5cd4e18aeb4dede51e24b26074c6d946d2a44a69
--- /dev/null
+++ b/infra/recipe_modules/hacky_tryserver_detection/api.py
@@ -0,0 +1,46 @@
+# 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.
+
+from recipe_engine import recipe_api
+
+PATCH_STORAGE_GIT = 'git'
+
+class HackyTryserverDetectionApi(recipe_api.RecipeApi):
+  @property
+  def patch_url(self):
+    """Reads patch_url property and corrects it if needed."""
+    url = self.m.properties.get('patch_url')
+    return url
+
+  @property
+  def is_tryserver(self):
+    """Returns true iff we can apply_issue or patch."""
+    return (self.can_apply_issue or self.is_patch_in_svn or
+            self.is_patch_in_git or self.is_gerrit_issue)
+
+  @property
+  def can_apply_issue(self):
+    """Returns true iff the properties exist to apply_issue from rietveld."""
+    return (self.m.properties.get('rietveld')
+            and 'issue' in self.m.properties
+            and 'patchset' in self.m.properties)
+
+  @property
+  def is_gerrit_issue(self):
+    """Returns true iff the properties exist to match a Gerrit issue."""
+    return ('event.patchSet.ref' in self.m.properties and
+            'event.change.url' in self.m.properties and
+            'event.change.id' in self.m.properties)
+
+  @property
+  def is_patch_in_svn(self):
+    """Returns true iff the properties exist to patch from a patch URL."""
+    return self.patch_url
+
+  @property
+  def is_patch_in_git(self):
+    return (self.m.properties.get('patch_storage') == PATCH_STORAGE_GIT and
+            self.m.properties.get('patch_repo_url') and
+            self.m.properties.get('patch_ref'))
+