deluge-1_x: Remove older version of Deluge

Deluge 1.x requires Python 2 which upstream has end-of-lifed.  Deluge depends
on pythonPackages.twisted, Python 2 support for which upstream has
nowdropped.  If pythonPackages.twisted is upgraded then Deluge 1.x breaks.
So, remove it instead of leaving it broken.

Deluge 2.x (deluge-2_x) is available and continues to work.

nixos/modules/services/torrent/deluge.nix

@@ -149,7 +149,7 @@ in {
 
         package = mkOption {
           type = types.package;
-          example = literalExample "pkgs.deluge-1_x";
+          example = literalExample "pkgs.deluge-2_x";
           description = ''
             Deluge package to use.
           '';
@@ -184,6 +184,13 @@ in {
       if versionAtLeast config.system.stateVersion "20.09" then
         pkgs.deluge-2_x
       else
+        # deluge-1_x is no longer packaged and this will resolve to an error
+        # thanks to the alias for this name.  This is left here so that anyone
+        # using NixOS older than 20.09 receives that error when they upgrade
+        # and is forced to make an intentional choice to switch to deluge-2_x.
+        # That might be slightly inconvenient but there is no path to
+        # downgrade from 2.x to 1.x so NixOS should not automatically perform
+        # this state migration.
         pkgs.deluge-1_x
     );
 

nixos/tests/deluge.nix

@@ -5,41 +5,6 @@ import ./make-test-python.nix ({ pkgs, ...} : {
   };
 
   nodes = {
-    simple1 = {
-      services.deluge = {
-        enable = true;
-        package = pkgs.deluge-1_x;
-        web = {
-          enable = true;
-          openFirewall = true;
-        };
-      };
-    };
-
-    declarative1 = {
-      services.deluge = {
-        enable = true;
-        package = pkgs.deluge-1_x;
-        openFirewall = true;
-        declarative = true;
-        config = {
-          allow_remote = true;
-          download_location = "/var/lib/deluge/my-download";
-          daemon_port = 58846;
-          listen_ports = [ 6881 6889 ];
-        };
-        web = {
-          enable = true;
-          port =  3142;
-        };
-        authFile = pkgs.writeText "deluge-auth" ''
-          localclient:a7bef72a890:10
-          andrew:password:10
-          user3:anotherpass:5
-        '';
-      };
-    };
-
     simple2 = {
       services.deluge = {
         enable = true;

pkgs/applications/networking/p2p/deluge/1.nix

@@ -1,42 +0,0 @@
-{ lib, stdenv, fetchurl, fetchpatch, intltool, libtorrent-rasterbar, pythonPackages }:
-
-pythonPackages.buildPythonPackage rec {
-  pname = "deluge";
-  version = "1.3.15";
-
-  src = fetchurl {
-    url = "http://download.deluge-torrent.org/source/${pname}-${version}.tar.bz2";
-    sha256 = "1467b9hmgw59gf398mhbf40ggaka948yz3afh6022v753c9j7y6w";
-  };
-
-  patches = [
-    # Fix preferences when built against libtorrent >=0.16
-    (fetchpatch {
-      url = "https://git.deluge-torrent.org/deluge/patch/?id=38d7b7cdfde3c50d6263602ffb03af92fcbfa52e";
-      sha256 = "0la3i0lkj6yv4725h4kbd07mhfwcb34w7prjl9gxg12q7px6c31d";
-    })
-  ];
-
-  propagatedBuildInputs = with pythonPackages; [
-    pyGtkGlade twisted Mako chardet pyxdg pyopenssl service-identity
-    libtorrent-rasterbar.dev libtorrent-rasterbar.python setuptools
-  ];
-
-  nativeBuildInputs = [ intltool ];
-
-  postInstall = ''
-     mkdir -p $out/share/applications
-     cp -R deluge/data/pixmaps $out/share/
-     cp -R deluge/data/icons $out/share/
-     cp deluge/data/share/applications/deluge.desktop $out/share/applications
-  '';
-
-  meta = with lib; {
-    homepage = "https://deluge-torrent.org";
-    description = "Torrent client";
-    license = licenses.gpl3Plus;
-    maintainers = with maintainers; [ domenkozar ebzzry ];
-    broken = stdenv.isDarwin;
-    platforms = platforms.all;
-  };
-}

pkgs/top-level/aliases.nix

@@ -183,6 +183,14 @@ mapAliases ({
   deepin = throw "deepin was a work in progress and it has been canceled and removed https://github.com/NixOS/nixpkgs/issues/94870"; # added 2020-08-31
   deepspeech = throw "deepspeech was removed in favor of stt. https://github.com/NixOS/nixpkgs/issues/119496"; # added 2021-05-05
   deltachat-electron = deltachat-desktop; # added 2021-07-18
+  deluge-1_x = throw ''
+    Deluge 1.x (deluge-1_x) is no longer supported.
+    Please use Deluge 2.x (deluge-2_x) instead, for example:
+
+        services.deluge.package = pkgs.deluge-2_x;
+
+    Note that it is NOT possible to switch back to Deluge 1.x after this change.
+  ''; # added 2021-08-18
   desktop_file_utils = desktop-file-utils; # added 2018-02-25
   devicemapper = lvm2; # added 2018-04-25
   digikam5 = digikam; # added 2017-02-18

pkgs/top-level/all-packages.nix

@@ -4195,10 +4195,6 @@ with pkgs;
     pythonPackages = python3Packages;
     libtorrent-rasterbar = libtorrent-rasterbar-1_2_x.override { python = python3; };
   };
-  deluge-1_x = callPackage ../applications/networking/p2p/deluge/1.nix {
-    pythonPackages = python2Packages;
-    libtorrent-rasterbar = libtorrent-rasterbar-1_1_x;
-  };
   deluge = deluge-2_x;
 
   desktop-file-utils = callPackage ../tools/misc/desktop-file-utils { };