From b40c9187a4506204a770ab360ba627d698c0a101 Mon Sep 17 00:00:00 2001
From: dalthviz <16781833+dalthviz@users.noreply.github.com>
Date: Mon, 27 Oct 2025 15:52:12 -0500
Subject: [PATCH] Prevent showing cmd on Windows when running flake8

---
 .gitignore                   | 1 +
 pylsp/plugins/flake8_lint.py | 9 ++++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index 3c4093d1..fe35f067 100644
--- a/.gitignore
+++ b/.gitignore
@@ -100,6 +100,7 @@ ENV/
 
 # Spyder project settings
 .spyderproject
+.spyproject
 
 # Rope project settings
 .ropeproject
diff --git a/pylsp/plugins/flake8_lint.py b/pylsp/plugins/flake8_lint.py
index 0ac91855..b0a71b88 100644
--- a/pylsp/plugins/flake8_lint.py
+++ b/pylsp/plugins/flake8_lint.py
@@ -34,6 +34,13 @@
     | {"E999"}
 )
 
+if sys.platform == "win32":
+    from subprocess import CREATE_NO_WINDOW
+else:
+    # CREATE_NO_WINDOW flag only available on Windows.
+    # Set constant as default `Popen` `creationflag` kwarg value (`0`)
+    CREATE_NO_WINDOW = 0
+
 
 @hookimpl
 def pylsp_settings():
@@ -128,7 +135,7 @@ def run_flake8(flake8_executable, args, document, source):
         )
 
     log.debug("Calling %s with args: '%s'", flake8_executable, args)
-    popen_kwargs = {}
+    popen_kwargs = {"creationflags": CREATE_NO_WINDOW}
     if cwd := document._workspace.root_path:
         popen_kwargs["cwd"] = cwd
     try: