working on harmonia

modules/dynamicism/harmonia.nix

@@ -0,0 +1,26 @@
+{ pkgs, lib, config, ... }:
+let
+  cfg = config.dynamicism.for.harmonia;
+  settingsFormat = pkgs.formats.toml { };
+
+  # FIXME: referring to config.dynamicism.finalSettings.* in here
+  # makes lib.checkAssertWarn in the generic module cause infinite recursion.
+  finalSettings = config.services.harmonia.settings;
+
+  configFile = settingsFormat.generate "harmonia-override.toml" finalSettings;
+in
+{
+  dynamicism.for.harmonia = {
+    source-options = [ "services.harmonia.settings" ];
+
+    unitDropins."harmonia.service" = pkgs.writeTextFile {
+      name = "harmonia-override.conf";
+      text = ''
+        [Service]
+        Environment=CONFIG_FILE=${configFile}
+      '';
+
+      passthru = { inherit configFile; };
+    };
+  };
+}