working on harmonia

modules/dynamicism/default.nix

@@ -4,6 +4,9 @@ let
     mkOption
     showOption
   ;
+  inherit (lib.asserts)
+    checkAssertWarn
+  ;
   t = lib.types;
 
   inherit (import ./lib.nix { inherit lib; })
@@ -19,7 +22,6 @@ let
   opts = options.dynamicism;
 
   subOpts = lib.mapAttrs (_: metaAttr: metaAttr.configuration.options) options.dynamicism.for.valueMeta.attrs;
-  settingsFormat = pkgs.formats.yaml { };
 
   finalSettingsFor = { ... }@submod: recUpdateFoldl (optPath:
     lib.setAttrByPath optPath (lib.getAttrFromPath optPath config)
@@ -82,45 +84,62 @@ in
   #
   # Generic implementation.
   #
-  config.dynamicism.doChange = {
-    option,
-    value,
-    configuration ? builtins.getEnv "NIXOS_CONFIG",
-  }: let
-    loc = opts.doChange.loc ++ [ "(function argument)" "value" ];
-    option' = typeCheck loc convenientAttrPath option;
-    nixosAfter = evalNixos {
-      configuration = { config, ... }: {
-        imports = [
-          configuration
-          (lib.setAttrByPath option' (lib.mkOverride (-999) value))
-        ];
+  config.system.activationScripts."dynamicism-reset" = {
+    deps = [ "etc" "stdio" "specialfs" ];
+    text = ''
+      echo "DYNIX: removing existing systemd dropins"
+      # FIXME: do for each enabled submodule
+      if [[ -d /run/systemd/system ]]; then
+        rm -v /run/systemd/system/*/dynix-*.conf || true
+      fi
+    '';
+  };
+  config.dynamicism = {
+    doChange = {
+      option,
+      value,
+      configuration ? builtins.getEnv "NIXOS_CONFIG",
+    }: let
+      loc = opts.doChange.loc ++ [ "(function argument)" "value" ];
+      option' = typeCheck loc convenientAttrPath option;
+      nixosAfter = evalNixos {
+        configuration = { config, ... }: {
+          imports = [
+            configuration
+            (lib.setAttrByPath option' (lib.mkOverride (-999) value))
+          ];
 
-        environment.systemPackages = [
-          config.dynamicism.for.gotosocial.activate
-        ];
+          environment.systemPackages = [
+            config.dynamicism.for.gotosocial.activate
+          ];
+        };
       };
-    };
 
-    allActivations = lib.mapAttrsToList (name: submod: submod.activate) config.dynamicism.for;
-    allActivationScripts = pkgs.writeShellApplication {
-      name = "dynamicism-activate";
-      runtimeInputs = allActivations;
-      text = nixosAfter.config.dynamicism.for
-      |> lib.mapAttrsToList (name: submod: ''
-        echo "Activating dynamicism for ${name}"
-        ${lib.getExe submod.activate}
-      '')
-      |> lib.concatStringsSep "\n";
-    };
-  in allActivationScripts;
+      allActivations = config.dynamicism.for
+      |> lib.filterAttrs (name: submod: submod.enable)
+      |> lib.mapAttrsToList (name: submod: submod.activate);
+      allActivationScripts = pkgs.writeShellApplication {
+        name = "dynamicism-activate";
+        runtimeInputs = allActivations;
+        text = nixosAfter.config.dynamicism.for
+        |> lib.filterAttrs (name: submod: submod.enable)
+        |> lib.mapAttrsToList (name: submod: ''
+          echo "Activating dynamicism for ${name}"
+          ${lib.getExe submod.activate}
+        '')
+        |> lib.concatStringsSep "\n";
+      };
+    in allActivationScripts;
 
-  config.dynamicism.finalSettings = lib.asserts.checkAssertWarn ourAssertions [ ] (
-    recUpdateFoldlAttrs (name: { ... }@submod: finalSettingsFor submod) config.dynamicism.for
-  );
+    finalSettings = config.dynamicism.for
+    |> recUpdateFoldlAttrs (name: { ... }@submod: finalSettingsFor submod)
+    |> checkAssertWarn ourAssertions [ ];
+  };
 
   # Implementations.
   imports = [
     ./gotosocial.nix
+    ./harmonia.nix
+    #./tzupdate.nix
   ];
 }

modules/dynamicism/gotosocial.nix

@@ -3,17 +3,20 @@ let
   cfg = config.dynamicism.for.gotosocial;
 
   settingsFormat = pkgs.formats.yaml { };
+  configFile = settingsFormat.generate "gotosocial-override.yml" config.services.gotosocial.settings;
 in
 {
   dynamicism.for.gotosocial = {
     source-options = [ "services.gotosocial.settings" ];
 
-    configFile = settingsFormat.generate "gotosocial-overrde.yml" config.services.gotosocial.settings;
-
-    unitDropins."gotosocial.service" = pkgs.writeText "gotosocial-override.conf" ''
-      [Service]
-      ExecStart=
-      ExecStart=${lib.getExe' pkgs.gotosocial "gotosocial"} --config-path ${cfg.configFile} start
-    '';
+    unitDropins."gotosocial.service" = pkgs.writeTextFile {
+      name = "gotosocial-override.conf";
+      text = ''
+        [Service]
+        ExecStart=
+        ExecStart=${lib.getExe' pkgs.gotosocial "gotosocial"} --config-path ${configFile} start
+      '';
+      passthru = { inherit configFile; };
+    };
   };
 }

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; };
+    };
+  };
+}

modules/dynamicism/submodule.nix

@@ -65,7 +65,7 @@ in
     };
 
     unitDropins = mkOption {
-      type = t.attrsOf t.pathInStore;
+      type = t.attrsOf t.package;
       internal = true;
     };
 
@@ -82,7 +82,7 @@ in
       text = let
         doEdits = config.unitDropins
           |> lib.mapAttrsToList (service: dropin: ''
-            cat "${dropin}" | systemctl edit "${service}" --runtime --stdin
+            cat "${dropin}" | systemctl edit "${service}" --runtime --drop=dynix-${dropin.name} --stdin
           '');
         doReloads = config.unitDropins
         |> lib.mapAttrsToList (service: _: ''

modules/dynamicism/tzupdate.nix

@@ -0,0 +1,20 @@
+{ pkgs, lib, config, ... }: let
+  cfg = config.dynamicism.for.tzupdate;
+
+
+  # FIXME: referring to config.dynamicism.finalSettings.* in here
+  # makes lib.checkAssertWarn in the generic module cause infinite recursion.
+  #finalSettings = config.dynamicism.finalSettings.tzupdate;
+  finalSettings = config.services.tzupdate.timer;
+in
+{
+  dynamicism.for.tzupdate = {
+    source-options = [ "services.tzupdate.timer" ];
+
+    unitDropins."tzupdate.timer" = pkgs.writeText "tzupdate-timer-override.conf" ''
+      [Timer]
+      OnCalendar=
+      OnCalendar=${finalSettings.interval}
+    '';
+  };
+}