From b86f4d52cf83890cb8d2558cf7010efe90ef8323 Mon Sep 17 00:00:00 2001
From: Martin Milata <martin@martinmilata.cz>
Date: Tue, 11 Feb 2020 00:09:53 +0100
Subject: [PATCH] gunicorn: add 19.x branch for python2.7 support

The nixos/moinmoin module uses gunicorn, however the 20.0 version
dropped python2 support which broke the module as there's no python3
port planned for moinmoin: http://moinmo.in/Python3
---
 .../python-modules/gunicorn/19.nix            | 39 +++++++++++++++++++
 pkgs/top-level/python-packages.nix            |  5 ++-
 2 files changed, 43 insertions(+), 1 deletion(-)
 create mode 100644 pkgs/development/python-modules/gunicorn/19.nix

diff --git a/pkgs/development/python-modules/gunicorn/19.nix b/pkgs/development/python-modules/gunicorn/19.nix
new file mode 100644
index 00000000000..f9681eef97e
--- /dev/null
+++ b/pkgs/development/python-modules/gunicorn/19.nix
@@ -0,0 +1,39 @@
+{ stdenv, buildPythonPackage, fetchPypi
+, coverage
+, mock
+, pytest
+, pytestcov
+, setuptools
+}:
+
+buildPythonPackage rec {
+  pname = "gunicorn";
+  version = "19.10.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1080jk1ly8j0rc6lv8i33sj94rxjaskd1732cdq5chdqb3ij9ppr";
+  };
+
+  propagatedBuildInputs = [ setuptools ];
+
+  checkInputs = [ pytest mock pytestcov coverage ];
+
+  prePatch = ''
+    substituteInPlace requirements_test.txt --replace "==" ">=" \
+      --replace "coverage>=4.0,<4.4" "coverage"
+  '';
+
+  # better than no tests
+  checkPhase = ''
+    $out/bin/gunicorn --help > /dev/null
+  '';
+
+  pythonImportsCheck = [ "gunicorn" ];
+
+  meta = with stdenv.lib; {
+    homepage = "https://github.com/benoitc/gunicorn";
+    description = "WSGI HTTP Server for UNIX";
+    license = licenses.mit;
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index de926517fbc..04fd9e76192 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3802,7 +3802,10 @@ in {
 
   rebulk = callPackage ../development/python-modules/rebulk { };
 
-  gunicorn = callPackage ../development/python-modules/gunicorn { };
+  gunicorn = if isPy27 then
+          callPackage ../development/python-modules/gunicorn/19.nix { }
+        else
+          callPackage ../development/python-modules/gunicorn { };
 
   hawkauthlib = callPackage ../development/python-modules/hawkauthlib { };