From c32617fd88fce776fa2331f34fceda79e40011f7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sandro=20J=C3=A4ckel?= <sandro.jaeckel@gmail.com>
Date: Fri, 13 Dec 2024 17:31:24 +0100
Subject: [PATCH] paperless-ngx: re-add xdist

Without it the tests run in ~12 1/2 minutes. With it and max 8 cores
they only take 2 1/2 minutes but sometimes fail. Lets max at 4 which
takes 3 1/2 minutes. Upstream maxes at 16 by default which doesn't work for us.
---
 pkgs/by-name/pa/paperless-ngx/package.nix | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/pkgs/by-name/pa/paperless-ngx/package.nix b/pkgs/by-name/pa/paperless-ngx/package.nix
index 3fcf619c7921..4005d852a895 100644
--- a/pkgs/by-name/pa/paperless-ngx/package.nix
+++ b/pkgs/by-name/pa/paperless-ngx/package.nix
@@ -161,9 +161,12 @@ python.pkgs.buildPythonApplication rec {
   ];
 
   postPatch = ''
-    # pytest-xdist makes the tests flaky
+    # pytest-xdist with to many threads makes the tests flaky
+    if (( $NIX_BUILD_CORES > 4)); then
+      NIX_BUILD_CORES=4
+    fi
     substituteInPlace src/setup.cfg \
-      --replace-fail "--numprocesses auto --maxprocesses=16" ""
+      --replace-fail "--numprocesses auto --maxprocesses=16" "--numprocesses $NIX_BUILD_CORES"
   '';
 
   nativeBuildInputs = [
@@ -277,9 +280,13 @@ python.pkgs.buildPythonApplication rec {
     pytest-httpx
     pytest-mock
     pytest-rerunfailures
+    pytest-xdist
     pytestCheckHook
   ];
 
+  # manually managed in postPatch
+  dontUsePytestXdist = false;
+
   pytestFlagsArray = [
     "src"
   ];