systemd: start unit after multi-user.target (#37)

* systemd: start unit after multi-user.targer.

Start the flatpak-managed-install service after
multi-user.target.
This should ensure that network interfaces are up,
and connectivity has been established.

* nixos: home-manager: remove RemainAfterExit

This is not really needed, since state changes
will be handled by a timer.

modules/home-manager.nix

@@ -18,16 +18,16 @@ in
     systemd.user.services."flatpak-managed-install" = {
       Unit = {
         After = [
-          "network.target"
+          "multi-user.target" # ensures that network & connectivity have been setup.
         ];
       };
       Install = {
         WantedBy = [
-          "default.target"
+          "default.target" # multi-user target with a GUI. For a desktop, this is typically going to be the graphical.target
         ];
       };
       Service = {
-        Type = "oneshot";
+        Type = "oneshot"; # TODO: should this be an async startup, to avoid blocking on network at boot ?
         ExecStart = import ./installer.nix { inherit cfg pkgs lib installation; };
       };
     };

modules/nixos.nix

@@ -8,14 +8,14 @@ in
 
   config = lib.mkIf config.services.flatpak.enable {
     systemd.services."flatpak-managed-install" = {
-      wants = [
-        "network-online.target"
-      ];
       wantedBy = [
-        "multi-user.target"
+        "default.target" # multi-user target with a GUI. For a desktop, this is typically going to be the graphical.target
+      ];
+      after = [
+        "multi-user.target" # ensures that network & connectivity have been setup.
       ];
       serviceConfig = {
-        Type = "oneshot";
+        Type = "oneshot"; # TODO: should this be an async startup, to avoid blocking on network at boot ?
         ExecStart = import ./installer.nix { inherit cfg pkgs lib installation; };
       };
     };