From 7d6468de0c54621f056403e6dae2c97f31700806 Mon Sep 17 00:00:00 2001
From: Frederik Rietdijk <fridh@fridh.nl>
Date: Mon, 30 Nov 2020 18:40:06 +0100
Subject: [PATCH] pythonPackages.isort: fix build system, keep version for
 python 2

---
 pkgs/development/python-modules/isort/4.nix   | 43 +++++++++++++++++++
 .../python-modules/isort/default.nix          |  9 ++--
 pkgs/top-level/python-packages.nix            |  6 ++-
 3 files changed, 50 insertions(+), 8 deletions(-)
 create mode 100644 pkgs/development/python-modules/isort/4.nix

diff --git a/pkgs/development/python-modules/isort/4.nix b/pkgs/development/python-modules/isort/4.nix
new file mode 100644
index 00000000000..b2ef4e66f36
--- /dev/null
+++ b/pkgs/development/python-modules/isort/4.nix
@@ -0,0 +1,43 @@
+{ lib, buildPythonPackage, fetchPypi, setuptools, isPy27, futures
+, backports_functools_lru_cache, mock, pytest
+}:
+
+let
+  skipTests = [ "test_requirements_finder" "test_pipfile_finder" ] ++ lib.optional isPy27 "test_standard_library_deprecates_user_issue_778";
+  testOpts = lib.concatMapStringsSep " " (t: "--deselect test_isort.py::${t}") skipTests;
+in buildPythonPackage rec {
+  pname = "isort";
+  version = "4.3.21"; # Note 4.x is the last version that supports Python2
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "54da7e92468955c4fceacd0c86bd0ec997b0e1ee80d97f67c35a78b719dccab1";
+  };
+
+  propagatedBuildInputs = [
+    setuptools
+  ] ++ lib.optionals isPy27 [ futures backports_functools_lru_cache ];
+
+  checkInputs = [ mock pytest ];
+
+  checkPhase = ''
+    # isort excludes paths that contain /build/, so test fixtures don't work
+    # with TMPDIR=/build/
+    PATH=$out/bin:$PATH TMPDIR=/tmp/ pytest ${testOpts}
+
+    # Confirm that the produced executable script is wrapped correctly and runs
+    # OK, by launching it in a subshell without PYTHONPATH
+    (
+      unset PYTHONPATH
+      echo "Testing that `isort --version-number` returns OK..."
+      $out/bin/isort --version-number
+    )
+  '';
+
+  meta = with lib; {
+    description = "A Python utility / library to sort Python imports";
+    homepage = "https://github.com/timothycrosley/isort";
+    license = licenses.mit;
+    maintainers = with maintainers; [ couchemar nand0p ];
+  };
+}
diff --git a/pkgs/development/python-modules/isort/default.nix b/pkgs/development/python-modules/isort/default.nix
index 4c28ad9cf68..bc11697339e 100644
--- a/pkgs/development/python-modules/isort/default.nix
+++ b/pkgs/development/python-modules/isort/default.nix
@@ -1,10 +1,9 @@
 { lib, buildPythonPackage, fetchFromGitHub
 , colorama
 , hypothesis
-, poetry
+, poetry-core
 , pylama
 , pytestCheckHook
-, setuptools
 }:
 
 let
@@ -20,10 +19,8 @@ in buildPythonPackage rec {
     sha256 = "1m7jpqssnbsn1ydrw1dn7nrcrggqcvj9v6mk5ampxmvk94xd2r2q";
   };
 
-  nativeBuildInputs = [ poetry ];
-
-  propagatedBuildInputs = [
-    setuptools
+  nativeBuildInputs = [
+    poetry-core
   ];
 
   checkInputs = [
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index afa3972bc4d..675ddd869d7 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3056,8 +3056,10 @@ in {
 
   isodate = callPackage ../development/python-modules/isodate { };
 
-  isort = callPackage ../development/python-modules/isort {
-    inherit (pkgs) poetry;
+  isort = if isPy3k then
+    callPackage ../development/python-modules/isort { }
+  else
+    callPackage ../development/python-modules/isort/4.nix {
   };
 
   isoweek = callPackage ../development/python-modules/isoweek { };