Examine sub-bundles when detecting changes.

project/util/lambda_pool.py

@@ -3,6 +3,7 @@
 import logging
 import subprocess
 import json
+import glob
 from dataclasses import dataclass
 from typing import List, Any, BinaryIO, Optional
 from threading import RLock
@@ -92,7 +93,7 @@ def __get_process(self) -> subprocess.Popen:
 
         with self.__lock:
             if self.restart_on_script_change:
-                mtime = self.script_path.stat().st_mtime
+                mtime = get_latest_mtime_for_bundle(self.script_path)
                 if mtime != self.__script_path_mtime:
                     self.__script_path_mtime = mtime
                     logger.debug(
@@ -186,6 +187,20 @@ def run_handler(self,
             )
 
 
+def get_latest_mtime_for_bundle(path: Path) -> float:
+    '''
+    Get the most recent modified time for the given source
+    bundle and any of its loadable sub-bundles. It is assumed
+    the sub-bundles all end with the name of the original source
+    bundle, e.g. if the source bundle is called "foo.js",
+    a source bundle would be "bar.foo.js".
+    '''
+
+    filenames = [str(path)] + glob.glob(str(path.with_name(f"*.{path.name}")))
+    latest_mtime = max(Path(filename).stat().st_mtime for filename in filenames)
+    return latest_mtime
+
+
 class MalformedResponseError(Exception):
     '''
     This error is raised if a lambda process' response is not valid