From e4ba360f342137e6449c6b0cbacfd2b106d8b474 Mon Sep 17 00:00:00 2001
From: "Dr.Lt.Data" <dr.lt.data@gmail.com>
Date: Tue, 18 Jun 2024 21:08:03 +0900
Subject: [PATCH] fix: Fix for the issue of pip version not upgrading

https://github.com/ltdrdata/ComfyUI-Manager/issues/772
---
 prestartup_script.py | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/prestartup_script.py b/prestartup_script.py
index 2be36c80..22a0d082 100644
--- a/prestartup_script.py
+++ b/prestartup_script.py
@@ -429,7 +429,20 @@ def is_installed(name):
                     print(f"[ComfyUI-Manager] skip black listed pip installation: '{name}'")
                     return True
 
-    return name.lower() in get_installed_packages()
+    pkg = get_installed_packages().get(name.lower())
+    if pkg is None:
+        return False  # update if not installed
+
+    if match is None:
+        return True   # don't update if version is not specified
+
+    if match.group(2) in ['>', '>=']:
+        if StrictVersion(pkg) < StrictVersion(match.group(3)):
+            return False
+        elif StrictVersion(pkg) > StrictVersion(match.group(3)):
+            print(f"[SKIP] Downgrading pip package isn't allowed: {name.lower()} (cur={pkg})")
+
+    return True       # prevent downgrade
 
 
 if os.path.exists(restore_snapshot_path):