sxmo: get gesture support working

hosts/modules/gui/sxmo.nix

@@ -1,5 +1,8 @@
 # this work derives from noneucat's sxmo service/packages, found via NUR
 # - <repo:nix-community/nur-combined:repos/noneucat/modules/pinephone/sxmo.nix>
+# other nix works:
+# - <https://github.com/wentam/sxmo-nix>
+# - <https://github.com/chuangzhu/nixpkgs-sxmo>
 #
 # sxmo documentation:
 # - <repo:anjan/sxmo-docs-next>
@@ -15,10 +18,14 @@
 #     - list available daemons: `sxmo_daemons.sh list`
 #     - query if a daemon is active: `sxmo_daemons.sh running <my-daemon>`
 #     - start daemon: `sxmo_daemons.sh start <my-daemon>`
+#   - managable by `superctl`
+#     - `superctl status`
 # - user hooks:
 #   - live in ~/.config/sxmo/hooks/
 # - logs:
 #   - live in ~/.local/state/sxmo.log
+#   - ~/.local/state/superd.log
+#   - ~/.local/state/superd/logs/<daemon>.log
 #   - `journalctl --user --boot`  (lightm redirects the sxmo session stdout => systemd)
 #
 # - default components:
@@ -31,7 +38,7 @@
 
 with lib;
 let
-  cfg = config.sane.gui.phosh;
+  cfg = config.sane.gui.sxmo;
 in
 {
   options = {
@@ -39,6 +46,38 @@ in
       default = false;
       type = types.bool;
     };
+    sane.gui.sxmo.hooks = mkOption {
+      type = types.package;
+      default = pkgs.runCommand "sxmo-hooks" { } ''
+        mkdir -p $out
+        ln -s ${pkgs.sxmo-utils}/share/sxmo/default_hooks $out/bin
+      '';
+      description = ''
+        hooks to make visible to sxmo.
+        a hook is a script generally of the name sxmo_hook_<thing>.sh
+        which is called by sxmo at key moments to proide user programmability.
+      '';
+    };
+    sane.gui.sxmo.deviceHooks = mkOption {
+      type = types.package;
+      default = pkgs.runCommand "sxmo-device-hooks" { } ''
+        mkdir -p $out
+        ln -s ${pkgs.sxmo-utils}/share/sxmo/default_hooks/unknown $out/bin
+      '';
+      description = ''
+        device-specific hooks to make visible to sxmo.
+        this package supplies things like `sxmo_hook_inputhandler.sh`.
+        a hook is a script generally of the name sxmo_hook_<thing>.sh
+        which is called by sxmo at key moments to proide user programmability.
+      '';
+    };
+    sane.gui.sxmo.terminal = mkOption {
+      type = types.nullOr (types.enum [ "foot" "st" "vte" ]);
+      default = "st";
+      description = ''
+        name of terminal to use for sxmo_terminal.sh
+      '';
+    };
   };
 
   config = mkMerge [
@@ -51,7 +90,7 @@ in
       };
     }
 
-    (mkIf config.sane.gui.sxmo.enable {
+    (mkIf cfg.enable {
       sane.programs.sxmoApps.enableFor.user.colin = true;
 
       # TODO: probably need to enable pipewire
@@ -101,15 +140,37 @@ in
         inotify-tools
         libnotify
         lisgd
+        mako
         superd
         sway
         sxmo-utils
+        cfg.deviceHooks
+        cfg.hooks
         xdg-user-dirs
-      ];
-      environment.sessionVariables.XDG_DATA_DIRS = [
-        # TODO: only need the share/sxmo directly linked
-        "${pkgs.sxmo-utils}/share"
-      ];
+      ] ++ lib.optionals (cfg.terminal != null) [ pkgs."${cfg.terminal}" ];
+      environment.sessionVariables = {
+        XDG_DATA_DIRS = [
+          # TODO: only need the share/sxmo directly linked
+          "${pkgs.sxmo-utils}/share"
+        ];
+        # XXX: make sure the user is part of the `input` group!
+        SXMO_LISGD_INPUT_DEVICE = "/dev/input/by-id/usb-Wacom_Co._Ltd._Pen_and_multitouch_sensor-event-if00";
+        # sxmo tries to determine device type from /proc/device-tree/compatible,
+        # but that doesn't seem to exist on NixOS?  (or maybe it just doesn't exist
+        # on non-aarch64 builds).
+        # the device type informs (at least):
+        # - SXMO_WIFI_MODULE
+        # - SXMO_RTW_SCAN_INTERVAL
+        # - SXMO_SYS_FILES
+        # - SXMO_TOUCHSCREEN_ID
+        # - SXMO_MONITOR
+        # - SXMO_ALSA_CONTROL_NAME
+        # - SXMO_SWAY_SCALE
+        # see <repo:mil/sxmo-utils:scripts/deviceprofiles>
+        # SXMO_DEVICE_NAME = "pine64,pinephone-1.2";
+      } // lib.optionalAttrs (cfg.terminal != null) {
+        TERMCMD = lib.mkDefault (if cfg.terminal == "vte" then "vte-2.91" else cfg.terminal);
+      };
     })
   ];
 }