gpsd: deploy via sane.programs interface

hosts/by-name/moby/gps.nix

@@ -40,10 +40,6 @@
 
 { config, lib, ... }:
 {
-  # test gpsd with `gpspipe -w -n 10 2> /dev/null | grep -m 1 TPV | jq '.lat, .lon' | tr '\n' ' '`
-  # ^ should return <lat> <long>
-  services.gpsd.enable = true;
-  services.gpsd.devices = [ "/dev/ttyUSB1" ];
 
   users.users.geoclue.extraGroups = [
     "dialout"  # TODO: figure out if dialout is required. that's for /dev/ttyUSB1, but geoclue probably doesn't read that?

hosts/common/programs/default.nix

@@ -63,6 +63,7 @@
     ./gnome-weather.nix
     ./go2tv.nix
     ./gpodder.nix
+    ./gpsd.nix
     ./grimshot.nix
     ./gst-device-monitor.nix
     ./gthumb.nix

hosts/common/programs/gpsd.nix

@@ -0,0 +1,15 @@
+# test gpsd with `gpspipe -w -n 10 2> /dev/null | grep -m 1 TPV | jq '.lat, .lon' | tr '\n' ' '`
+# ^ should return <lat> <long>
+#
+# TODO(2024/06/19): nixpkgs' gpsd service isn't sandboxed at ALL. i should sandbox that, or remove this integration.
+{ config, lib, ... }:
+let
+  cfg = config.sane.programs.gpsd;
+in
+{
+  sane.programs.gpsd = {};
+  services.gpsd = lib.mkIf cfg.enabled {
+    enable = true;
+    devices = [ "/dev/ttyUSB1" ];
+  };
+}

hosts/common/programs/mepo.nix

@@ -16,13 +16,11 @@
       { type = "file"; path = ".cache/mepo/savestate"; }
     ];
 
-    # enable geoclue2 integration,
-    # and give mepo access to gpsd for location data, if that's enabled.
-    # TODO: this gpsd stuff should be moved to its own file!
+    # enable geoclue2 and gpsd for location data.
     suggestedPrograms = [
       "geoclue2"
-    ] ++ lib.optional config.services.gpsd.enable "gpsd"
-    ;
+      "gpsd"
+    ];
   };
 
   # programs.mepo = lib.mkIf config.sane.programs.mepo.enabled {