From aa13521d42bfdb66bb0d89005cbe54a84eaa4fda Mon Sep 17 00:00:00 2001
From: David Lord <davidism@gmail.com>
Date: Tue, 22 Feb 2022 19:04:03 -0800
Subject: [PATCH] lazy loading preserves click context

---
 CHANGES.rst      | 3 +++
 src/flask/cli.py | 8 ++++++++
 2 files changed, 11 insertions(+)

diff --git a/CHANGES.rst b/CHANGES.rst
index aa4b53ea..4b962e58 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -42,6 +42,9 @@ Unreleased
 -   Add an ``--exclude-patterns`` option to the ``flask run`` CLI
     command to specify patterns that will be ignored by the reloader.
     :issue:`4188`
+-   When using lazy loading (the default with the debugger), the Click
+    context from the ``flask run`` command remains available in the
+    loader thread. :issue:`4460`
 
 
 Version 2.0.3
diff --git a/src/flask/cli.py b/src/flask/cli.py
index d59942b8..972698df 100644
--- a/src/flask/cli.py
+++ b/src/flask/cli.py
@@ -301,9 +301,17 @@ class DispatchingApp:
             self._load_in_background()
 
     def _load_in_background(self):
+        # Store the Click context and push it in the loader thread so
+        # script_info is still available.
+        ctx = click.get_current_context(silent=True)
+
         def _load_app():
             __traceback_hide__ = True  # noqa: F841
+
             with self._lock:
+                if ctx is not None:
+                    click.globals.push_context(ctx)
+
                 try:
                     self._load_unlocked()
                 except Exception as e: