From 684496cfb64cd17faf676ea5f6b021a9938f5be7 Mon Sep 17 00:00:00 2001
From: Erik Arvstedt <erik.arvstedt@gmail.com>
Date: Sun, 6 Sep 2020 12:53:49 +0200
Subject: [PATCH] paperless: fix build

Paperless was dependent on older older versions of recently updated
Python packages.
---
 .../applications/office/paperless/default.nix | 26 ++++++++--------
 .../paperless/python-modules/default.nix      | 30 +++++++++++++++++++
 2 files changed, 43 insertions(+), 13 deletions(-)
 create mode 100644 pkgs/applications/office/paperless/python-modules/default.nix

diff --git a/pkgs/applications/office/paperless/default.nix b/pkgs/applications/office/paperless/default.nix
index c549b107c54..ebd057da5ce 100644
--- a/pkgs/applications/office/paperless/default.nix
+++ b/pkgs/applications/office/paperless/default.nix
@@ -106,26 +106,26 @@ let
   };
 
   python = python3.override {
-    packageOverrides = self: super: {
-      # Paperless only supports Django 2.0
-      django = django_2_0 super;
+    packageOverrides = self: super: let
+      customPkgs = import ./python-modules super fetchFromGitHub; in
+    {
       pyocr = pyocrWithUserTesseract super;
+
+      # Paperless only supports Django 2.0
+      django = customPkgs.django_2_0;
+
+      # Paperless is incompatible with factory_boy >= 3
+      factory_boy = customPkgs.factory_boy_2_12_0;
+
+      # The current version of django_extensions is incompatible with django 2.0
+      django_extensions = customPkgs.django_extensions_2_2_8;
+
       # These are pre-release versions, hence they are private to this pkg
       django-filter = self.callPackage ./python-modules/django-filter.nix {};
       django-crispy-forms = self.callPackage ./python-modules/django-crispy-forms.nix {};
     };
   };
 
-  django_2_0 = pyPkgs: pyPkgs.django_2_2.overrideDerivation (_: rec {
-    pname = "Django";
-    version = "2.0.12";
-    name = "${pname}-${version}";
-    src = pyPkgs.fetchPypi {
-      inherit pname version;
-      sha256 = "15s8z54k0gf9brnz06521bikm60ddw5pn6v3nbvnl47j1jjsvwz2";
-    };
-  });
-
   runtimePackages = with python.pkgs; [
     dateparser
     dateutil
diff --git a/pkgs/applications/office/paperless/python-modules/default.nix b/pkgs/applications/office/paperless/python-modules/default.nix
new file mode 100644
index 00000000000..40a496312fa
--- /dev/null
+++ b/pkgs/applications/office/paperless/python-modules/default.nix
@@ -0,0 +1,30 @@
+pyPkgs: fetchFromGitHub:
+{
+  django_2_0 = pyPkgs.django_2_2.overridePythonAttrs (old: rec {
+    version = "2.0.12";
+    src = pyPkgs.fetchPypi {
+      inherit (old) pname;
+      inherit version;
+      sha256 = "15s8z54k0gf9brnz06521bikm60ddw5pn6v3nbvnl47j1jjsvwz2";
+    };
+  });
+
+  django_extensions_2_2_8 = pyPkgs.django_extensions.overridePythonAttrs (old: rec {
+    version = "2.2.8";
+    src = fetchFromGitHub {
+      owner = old.pname;
+      repo = old.pname;
+      rev = version;
+      sha256 = "1gd3nykwzh3azq1p9cvgkc3l5dwrv7y86sfjxd9llbyj8ky71iaj";
+    };
+  });
+
+  factory_boy_2_12_0 = pyPkgs.factory_boy.overridePythonAttrs (old: rec {
+    version = "2.12.0";
+    src = pyPkgs.fetchPypi {
+      inherit (old) pname;
+      inherit version;
+      sha256 = "0w53hjgag6ad5i2vmrys8ysk54agsqvgbjy9lg8g0d8pi9h8vx7s";
+    };
+  });
+}