Have the build manager sleep if the requested manager is external

buildman/builder.py

@@ -1,6 +1,7 @@
 import logging
 import os
 import features
+import time
 
 from app import app, userfiles as user_files, build_logs, dockerfile_build_queue
 
@@ -15,6 +16,8 @@ BUILD_MANAGERS = {
   'enterprise': EnterpriseManager
 }
 
+EXTERNALLY_MANAGED = 'external'
+
 def run_build_manager():
   if not features.BUILD_SUPPORT:
     logger.debug('Building is disabled. Please enable the feature flag')
@@ -24,6 +27,13 @@ def run_build_manager():
   if build_manager_config is None:
     return
 
+  # If the build system is externally managed, then we just sleep this process.
+  if build_manager_config[0] == EXTERNALLY_MANAGED:
+    logger.debug('Builds are externally managed.')
+    while True:
+      time.sleep(1000)
+    return
+
   logger.debug('Asking to start build manager with lifecycle "%s"', build_manager_config[0])
   manager_klass = BUILD_MANAGERS.get(build_manager_config[0])
   if manager_klass is None: