First stab at implementing token.activate.

endpoints/trigger.py

@@ -47,11 +47,12 @@ class BuildTrigger(object):
 
   def is_active(self, config):
     """
-    Returns True if the current build trigger is active. Inactive means further setup is needed.
+    Returns True if the current build trigger is active. Inactive means further
+    setup is needed.
     """
     raise NotImplementedError
 
-  def activate(self, auth_token, config):
+  def activate(self, trigger_uuid, standard_webhook_url, auth_token, config):
     """ 
     Activates the trigger for the service, with the given new configuration.
     """
@@ -90,9 +91,23 @@ class GithubBuildTrigger(BuildTrigger):
   def is_active(self, config):
     return 'build_source' in config and len(config['build_source']) > 0
 
-  def activate(self, auth_token, config):
-    # TODO: Add the callback web hook to the github repository.
-    pass
+  def activate(self, trigger_uuid, standard_webhook_url, auth_token, config):
+    new_build_source = config['build_source']
+    gh_client = self._get_client(auth_token)
+
+    try:
+      to_add_webhook = gh_client.get_repo(new_build_source)
+
+      webhook_config = {
+        'url': standard_webhook_url,
+        'content_type': 'json',
+      }
+
+      to_add_webhook.create_hook('web', webhook_config)
+
+
+    except Exception:
+      pass
 
   def list_build_sources(self, auth_token):
     gh_client = self._get_client(auth_token)