services.eww: init

There is no point in making eww a program (as it is now) as it does
nothing more that install eww package.  Eww uses it's own
configuration language, therefore it's not likely going to be
configured via nix settings etc.  Current `programs.eww.config` option
seems to be broken as per: #4595 #4886 .  Personally I think we should
remove eww from programs.

There was a packaging request: #4265

Perhaps `programs.eww` should be removed?

modules/lib/maintainers.nix

@@ -171,6 +171,12 @@
     github = "LucasWagler";
     githubId = 32136449;
   };
+  madnat = {
+    name = "Jakub Kopański";
+    email = "nix@jakub.famisoft.pl";
+    github = "jkopanski";
+    githubId = 611423;
+  };
   matrss = {
     name = "Matthias Riße";
     email = "matrss@users.noreply.github.com";

modules/misc/news.nix

@@ -1443,6 +1443,13 @@ in {
           A new module is available: 'programs.joplin-desktop'.
         '';
       }
+
+      {
+        time = "2024-03-13T17:04:13+00:00";
+        message = ''
+          A new module is available: 'services.eww'.
+        '';
+      }
     ];
   };
 }

modules/modules.nix

@@ -280,6 +280,7 @@ let
     ./services/emacs.nix
     ./services/etesync-dav.nix
     ./services/espanso.nix
+    ./services/eww.nix
     ./services/flameshot.nix
     ./services/fluidsynth.nix
     ./services/fnott.nix

modules/services/eww.nix

@@ -0,0 +1,42 @@
+{ config, lib, pkgs, ... }:
+
+let cfg = config.services.eww;
+
+in {
+  meta.maintainers = [ lib.hm.maintainers.madnat ];
+
+  options = {
+    services.eww = {
+      enable = lib.mkEnableOption "ElKowars wacky widgets daemon";
+
+      package = lib.mkPackageOption pkgs "eww" { };
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    assertions = [
+      (lib.hm.assertions.assertPlatform "services.emacs" pkgs
+        lib.platforms.linux)
+    ];
+
+    home.packages = [ cfg.package ];
+
+    systemd.user.services.eww = {
+      Unit = {
+        Description = "ElKowars wacky widgets daemon";
+        After = [ "graphical-session.target" ];
+        PartOf = [ "graphical-session.target" ];
+      };
+
+      Service = let eww = lib.getExe cfg.package;
+      in {
+        Type = "simple";
+        ExecStart = "${eww} daemon --no-daemonize";
+        ExecStop = "${eww} kill";
+        ExecReload = "${eww} reload";
+      };
+
+      Install.WantedBy = [ "graphical-session.target" ];
+    };
+  };
+}

tests/default.nix

@@ -223,6 +223,7 @@ in import nmtSrc {
     ./modules/services/dropbox
     ./modules/services/emacs
     ./modules/services/espanso
+    ./modules/services/eww
     ./modules/services/flameshot
     ./modules/services/fluidsynth
     ./modules/services/fnott

tests/modules/services/eww/basic-configuration.nix

@@ -0,0 +1,19 @@
+{ config, pkgs, ... }:
+
+{
+  config = {
+    services.eww = {
+      enable = true;
+      package = pkgs.writeScriptBin "dummy-eww" "";
+    };
+
+    nmt.script = ''
+      local serviceFile=home-files/.config/systemd/user/eww.service
+
+      assertFileExists $serviceFile
+      assertFileRegex $serviceFile 'ExecStart=.*/bin/eww --no-daemonize'
+      assertFileRegex $serviceFile 'ExecStop=.*/bin/eww kill'
+      assertFileRegex $serviceFile 'ExecReload=.*/bin/eww reload'
+    '';
+  };
+}

tests/modules/services/eww/default.nix

@@ -0,0 +1 @@
+{ eww-basic-configuration = ./basic-configuration.nix; }