avizo: add module

PR #3601

.github/CODEOWNERS

@@ -365,6 +365,8 @@ Makefile                                              @thiagokokada
 
 /modules/services/autorandr.nix                       @GaetanLepage
 
+/modules/services/avizo.nix                           @pltanton
+
 /modules/services/barrier.nix                         @Kritnich
 /tests/modules/services/barrier                       @Kritnich
 

modules/misc/news.nix

@@ -923,6 +923,14 @@ in
           A new module is available: 'services.mpd-mpris'.
         '';
       }
+
+      {
+        time = "2023-02-22T22:16:37+00:00";
+        condition = hostPlatform.isLinux;
+        message = ''
+          A new module is available: 'services.avizo'.
+        '';
+      }
     ];
   };
 }

modules/modules.nix

@@ -205,6 +205,7 @@ let
     ./programs/zsh.nix
     ./programs/zsh/prezto.nix
     ./services/autorandr.nix
+    ./services/avizo.nix
     ./services/barrier.nix
     ./services/betterlockscreen.nix
     ./services/blueman-applet.nix

modules/services/avizo.nix

@@ -0,0 +1,75 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.avizo;
+  settingsFormat = pkgs.formats.ini { };
+in {
+  meta.maintainers = [ hm.maintainers.pltanton ];
+
+  options.services.avizo = {
+    enable = mkEnableOption "avizo, a simple notification daemon";
+
+    settings = mkOption {
+      type = (pkgs.formats.ini { }).type;
+      default = { };
+      example = literalExpression ''
+        {
+          default = {
+            time = 1.0;
+            y-offset = 0.5;
+            fade-in = 0.1;
+            fade-out = 0.2;
+            padding = 10;
+          };
+        }
+      '';
+      description = ''
+        The settings that will be written to the avizo configuration file.
+      '';
+    };
+
+    package = mkOption {
+      type = types.package;
+      default = pkgs.avizo;
+      defaultText = literalExpression "pkgs.avizo";
+      example = literalExpression ''
+        pkgs.avizo.overrideAttrs (final: prev: {
+          patchPhase = "cp ''${./images}/*.png data/images/";
+        })
+      '';
+      description = "The <literal>avizo</literal> package to use.";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    assertions =
+      [ (hm.assertions.assertPlatform "services.avizo" pkgs platforms.linux) ];
+
+    home.packages = [ cfg.package ];
+
+    xdg.configFile."avizo/config.ini".source =
+      settingsFormat.generate "avizo-config.ini" cfg.settings;
+
+    systemd.user = {
+      services.avizo = {
+        Unit = {
+          Description = "Volume/backlight OSD indicator";
+          PartOf = [ "graphical-session.target" ];
+          After = [ "graphical-session.target" ];
+          ConditionEnvironment = "WAYLAND_DISPLAY";
+          Documentation = "man:avizo(1)";
+        };
+
+        Service = {
+          Type = "simple";
+          ExecStart = "${cfg.package}/bin/avizo-service";
+          Restart = "always";
+        };
+
+        Install = { WantedBy = [ "graphical-session.target" ]; };
+      };
+    };
+  };
+}