pulseeffects: add module

Pulseeffects is an advanced mixer for PulseAudio.

PR #1182

.github/CODEOWNERS

@@ -129,6 +129,8 @@
 
 /modules/services/pasystray.nix                       @pltanton
 
+/modules/services/pulseeffects.nix                    @jonringer
+
 /modules/services/random-background.nix               @rycee
 
 /modules/services/redshift.nix                        @rycee

modules/misc/news.nix

@@ -1481,6 +1481,14 @@ in
           A new module is available: 'programs.lf'
         '';
       }
+
+      {
+        time = "2020-04-26T13:46:28+00:00";
+        condition = hostPlatform.isLinux;
+        message = ''
+          A new module is available: 'services.pulseeffects'
+        '';
+      }
     ];
   };
 }

modules/modules.nix

@@ -146,6 +146,7 @@ let
     (loadModule ./services/pasystray.nix { })
     (loadModule ./services/picom.nix { })
     (loadModule ./services/polybar.nix { })
+    (loadModule ./services/pulseeffects.nix { condition = hostPlatform.isLinux; })
     (loadModule ./services/random-background.nix { })
     (loadModule ./services/redshift.nix { })
     (loadModule ./services/rsibreak.nix { condition = hostPlatform.isLinux; })

modules/services/pulseeffects.nix

@@ -0,0 +1,52 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.pulseeffects;
+
+  presetOpts = optionalString (cfg.preset != "") "--load-preset ${cfg.preset}";
+
+in {
+  meta.maintainers = [ maintainers.jonringer ];
+
+  options.services.pulseeffects = {
+    enable = mkEnableOption "Pulseeffects daemon";
+
+    preset = mkOption {
+      type = types.str;
+      default = "";
+      description = ''
+        Which preset to use when starting pulseeffects.
+        Will likely need to launch pulseeffects to initially create preset.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    # running pulseeffects will just attach itself to gapplication service
+    # at-spi2-core is to minimize journalctl noise of:
+    # "AT-SPI: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files"
+    home.packages = [ pkgs.pulseeffects pkgs.at-spi2-core ];
+
+    # Will need to add `services.dbus.packages = with pkgs; [ gnome3.dconf ];`
+    # to /etc/nixos/configuration.nix for daemon to work correctly
+
+    systemd.user.services.pulseeffects = {
+      Unit = {
+        Description = "Pulseeffects daemon";
+        Requires = [ "pulseaudio.service" "dbus.service" ];
+        After = [ "graphical-session.target" ];
+      };
+
+      Service = {
+        ExecStart =
+          "${pkgs.pulseeffects}/bin/pulseeffects --gapplication-service ${presetOpts}";
+        ExecStop = "${pkgs.pulseeffects}/bin/pulseeffects --quit";
+        Restart = "on-failure";
+        RestartSec = 5;
+      };
+    };
+  };
+}