Python Help Window Feature Addition - Use ConfigService for Docs Path (#39201)

* Updates to enable config Service

* Updates made based on comments.

* Fix windows test failure.

* Updates to handle file not found error

Author: darshdinger

qt/python/mantidqt/mantidqt/widgets/helpwindow/helpwindowbridge.py

@@ -1,56 +1,62 @@
-# Mantid Repository : https://github.com/mantidproject/mantid
-#
 # Copyright © 2017 ISIS Rutherford Appleton Laboratory UKRI,
 #   NScD Oak Ridge National Laboratory, European Spallation Source,
 #   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
 # SPDX - License - Identifier: GPL - 3.0 +
-import os
 import sys
-import argparse
 
 from qtpy.QtWidgets import QApplication
 from mantidqt.widgets.helpwindow.helpwindowpresenter import HelpWindowPresenter
 
 _presenter = None
 
 
-def show_help_page(relativeUrl, localDocs=None, onlineBaseUrl="https://docs.mantidproject.org/"):
+def show_help_page(relativeUrl, onlineBaseUrl="https://docs.mantidproject.org/"):
     """
     Show the help window at the given relative URL path.
+    Local docs path is now determined internally via ConfigService.
     """
     global _presenter
     if _presenter is None:
-        # Create a Presenter once. Re-use it on subsequent calls.
-        _presenter = HelpWindowPresenter(localDocs=localDocs, onlineBaseUrl=onlineBaseUrl)
+        _presenter = HelpWindowPresenter(onlineBaseUrl=onlineBaseUrl)
 
-    # Ask the Presenter to load the requested page
     _presenter.show_help_page(relativeUrl)
 
 
 def main(cmdargs=sys.argv):
     """
     Run this script standalone to test the Python-based Help Window.
+    Local docs path is determined from Mantid's ConfigService.
     """
+    import argparse
+
     parser = argparse.ArgumentParser(description="Standalone test of the Python-based Mantid Help Window.")
     parser.add_argument(
         "relativeUrl", nargs="?", default="", help="Relative doc path (e.g. 'algorithms/Load-v1.html'), defaults to 'index.html' if empty."
     )
-    parser.add_argument("--local-docs", default=None, help="Path to local Mantid HTML docs. Overrides environment if set.")
+
     parser.add_argument(
         "--online-base-url",
         default="https://docs.mantidproject.org/",
-        help="Base URL for online docs if local docs are not set or invalid.",
+        help="Base URL for online docs if local docs path from config is invalid or not found.",
     )
     args = parser.parse_args(cmdargs or sys.argv[1:])
 
-    # If user gave no --local-docs, fall back to environment
-    if args.local_docs is None:
-        args.local_docs = os.environ.get("MANTID_LOCAL_DOCS_BASE", None)
+    try:
+        import mantid.kernel
+
+        log = mantid.kernel.Logger("HelpWindowBridge")
+        log.information("Mantid kernel imported successfully.")
+    except ImportError as e:
+        print(f"ERROR: Failed to import Mantid Kernel: {e}", file=sys.stderr)
+        print(
+            "Ensure Mantid is built and PYTHONPATH is set correctly (e.g., export PYTHONPATH=/path/to/mantid/build/bin:$PYTHONPATH)",
+            file=sys.stderr,
+        )
+        sys.exit(1)
 
     app = QApplication(sys.argv)
 
-    # Show the requested help page
-    show_help_page(relativeUrl=args.relativeUrl, localDocs=args.local_docs, onlineBaseUrl=args.online_base_url)
+    show_help_page(relativeUrl=args.relativeUrl, onlineBaseUrl=args.online_base_url)
 
     sys.exit(app.exec_())