bitlbee service: enable plugins

nixos/modules/services/networking/bitlbee.nix

@@ -21,6 +21,7 @@ let
     DaemonInterface = ${cfg.interface}
     DaemonPort = ${toString cfg.portNumber}
     AuthMode = ${cfg.authMode}
+    Plugindir = ${pkgs.bitlbee-plugins cfg.plugins}/lib/bitlbee
     ${lib.optionalString (cfg.hostName != "") "HostName = ${cfg.hostName}"}
     ${lib.optionalString (cfg.protocols != "") "Protocols = ${cfg.protocols}"}
     ${cfg.extraSettings}
@@ -85,6 +86,15 @@ in
         '';
       };
 
+      plugins = mkOption {
+        type = types.listOf types.package;
+        default = [];
+        example = literalExample "[ pkgs.bitlbee-facebook ]";
+        description = ''
+          The list of bitlbee plugins to install.
+        '';
+      };
+
       configDir = mkOption {
         default = "/var/lib/bitlbee";
         type = types.path;

pkgs/applications/networking/instant-messengers/bitlbee/plugins.nix

@@ -0,0 +1,20 @@
+{ stdenv, bitlbee }:
+
+with stdenv.lib;
+
+plugins:
+
+stdenv.mkDerivation {
+  inherit bitlbee plugins;
+  name = "bitlbee-plugins";
+  buildInputs = [ bitlbee plugins ];
+  phases = [ "installPhase" ];
+  installPhase = ''
+    mkdir -p $out/lib/bitlbee
+    for plugin in $plugins; do
+      for thing in $(ls $plugin/lib/bitlbee); do
+        ln -s $plugin/lib/bitlbee/$thing $out/lib/bitlbee/
+      done
+    done
+  '';
+}

pkgs/top-level/all-packages.nix

@@ -10829,6 +10829,8 @@ let
   bibletime = callPackage ../applications/misc/bibletime { };
 
   bitlbee = callPackage ../applications/networking/instant-messengers/bitlbee { };
+  bitlbee-plugins = callPackage ../applications/networking/instant-messengers/bitlbee/plugins.nix { };
+
   bitlbee-facebook = callPackage ../applications/networking/instant-messengers/bitlbee-facebook { };
 
   bitmeter = callPackage ../applications/audio/bitmeter { };