From a58404485592b22983e080c711136c8c20a1e37b Mon Sep 17 00:00:00 2001
From: Michael Weiss <dev.primeos@gmail.com>
Date: Mon, 27 Jan 2020 19:02:50 +0100
Subject: [PATCH] python38Packages.tatsu: 4.4.0 -> 5.0.0

Changelog: https://github.com/neogeny/TatSu/blob/v5.0.0/CHANGELOG.rst#500--2020-01-26

I've successfully tested the Python 3.7 support with
python3Packages.ics.
---
 pkgs/development/python-modules/tatsu/default.nix | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/python-modules/tatsu/default.nix b/pkgs/development/python-modules/tatsu/default.nix
index 539cbdca3ee1..922ca1b9b957 100644
--- a/pkgs/development/python-modules/tatsu/default.nix
+++ b/pkgs/development/python-modules/tatsu/default.nix
@@ -6,15 +6,23 @@
 
 buildPythonPackage rec {
   pname = "TatSu";
-  version = "4.4.0";
+  version = "5.0.0";
 
   src = fetchFromGitHub {
     owner = "neogeny";
     repo = pname;
     rev = "v${version}";
-    sha256 = "1jjd73yr3x56ij2ggxf6s62mf90i9v7wn3i0h67zxys55hlp2yh4";
+    sha256 = "1c16fcxf0xjkh5py9bnj6ljb9krhrj57mkwayl1w1dvzwl5lkgj3";
   };
 
+  # Since version 5.0.0 only >=3.8 is officially supported, but ics is not
+  # compatible with Python 3.8 due to aiohttp:
+  disabled = pythonOlder "3.7";
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace "python_requires='>=3.8'," "python_requires='>=3.7',"
+  '';
+
   nativeBuildInputs = [ pytestrunner ];
   propagatedBuildInputs = [ colorama mypy pyyaml regex ]
     ++ stdenv.lib.optionals (pythonOlder "3.7") [ dataclasses ]