feat(hass): extend options of services with configFiles

devices/homie/modules/home-assistant/default.nix

@@ -1,4 +1,4 @@
-{pkgs, ...}: {
+{pkgs, self, ...}: {
   imports = [
     ./assist.nix
     ./bluetooth.nix
@@ -7,9 +7,9 @@
     ./netdaemon
     ./spotify.nix
     ./timer.nix
-  ];
 
-  # TODO: nix: add HA options for custom_sentences and stuff
+    self.nixosModules.ha-plus
+  ];
 
   services.home-assistant = {
     enable = true;

devices/homie/modules/home-assistant/frontend.nix

@@ -3,31 +3,18 @@
   dracul-ha-src,
   material-rounded-theme-src,
   material-symbols-src,
-  lib,
   pkgs,
   ...
 }: let
-  inherit (lib) concatStringsSep getExe;
   inherit (pkgs.writers) writeYAML;
-
-  themes = [
-    "${caule-themes-src}/themes/caule-themes-pack-1.yaml"
-    "${dracul-ha-src}/themes/dracul-ha.yaml"
-    "${material-rounded-theme-src}/themes/material_rounded.yaml"
-  ];
 in {
-  systemd.services.home-assistant.preStart = let
-    WorkingDirectory = "/var/lib/hass";
-  in
-    getExe (pkgs.writeShellApplication {
-      name = "ha-themes";
-      text = ''
-        mkdir -p ${WorkingDirectory}/themes
-        cp -f ${concatStringsSep " " themes} ${WorkingDirectory}/themes
-      '';
-    });
-
   services.home-assistant = {
+    configFiles = {
+      "themes/caule.yaml".source = "${caule-themes-src}/themes/caule-themes-pack-1.yaml";
+      "themes/dracul-ha.yaml".source = "${dracul-ha-src}/themes/dracul-ha.yaml";
+      "themes/material_rounded.yaml".source = "${material-rounded-theme-src}/themes/material_rounded.yaml";
+    };
+
     customLovelaceModules = builtins.attrValues {
       inherit
         (pkgs.home-assistant-custom-lovelace-modules)

devices/homie/modules/home-assistant/spotify.nix

@@ -1,27 +1,9 @@
 {
   config,
-  lib,
   pkgs,
   self,
   ...
-}: let
-  inherit (lib) getExe;
-  inherit (pkgs.writers) writeYAML;
-in {
-  systemd.services.home-assistant.preStart = let
-    WorkingDirectory = "/var/lib/hass";
-    creds = config.sops.secrets.spotifyd.path;
-    spotify = writeYAML "assist_spotify.yaml" (import ./spotify-sentences.nix);
-  in
-    getExe (pkgs.writeShellApplication {
-      name = "spotify-files";
-      text = ''
-        mkdir -p ${WorkingDirectory}/custom_sentences/en
-        cp -f ${spotify} ${WorkingDirectory}/custom_sentences/en/assist_spotify.yaml
-        cp -f ${creds} ${WorkingDirectory}/.storage/SpotifyWebApiPython_librespot_credentials.json
-      '';
-    });
-
+}: {
   services.home-assistant = {
     customComponents = builtins.attrValues {
       inherit
@@ -34,6 +16,12 @@ in {
       "spotify"
     ];
 
+    customSentences."assist_spotify" = import ./spotify-sentences.nix;
+
+    configFiles.
+      ".storage/SpotifyWebApiPython_librespot_credentials.json"
+      .source = config.sops.secrets.spotifyd.path;
+
     config.intent_script = {
       PlayAlbum = {
         async_action = "false";

devices/homie/modules/home-assistant/timer.nix

@@ -1,11 +1,6 @@
 # From https://github.com/don86nl/ha_intents/blob/main/config/packages/assist_timers.yaml
-{
-  lib,
-  pkgs,
-  ...
-}: let
-  inherit (lib) concatStrings concatStringsSep getExe;
-  inherit (pkgs.writers) writeYAML;
+{lib, ...}: let
+  inherit (lib) concatStrings concatStringsSep;
 
   mkTimer = id: {
     "assist_timer${toString id}" = {
@@ -43,20 +38,9 @@
     timer_media_location = "/path/to/file.mp3";
   };
 in {
-  systemd.services.home-assistant.preStart = let
-    WorkingDirectory = "/var/lib/hass";
-
-    timer = writeYAML "assist_timers.yaml" (import ./timer-sentences.nix);
-  in
-    getExe (pkgs.writeShellApplication {
-      name = "timer-files";
-      text = ''
-        mkdir -p ${WorkingDirectory}/custom_sentences/en
-        cp -f ${timer} ${WorkingDirectory}/custom_sentences/en/assist_timers.yaml
-      '';
-    });
-
   services.home-assistant = {
+    customSentences."assist_timers" = import ./timer-sentences.nix;
+
     config = {
       homeassistant.customize."script.assist_timerstart" = {inherit settings;};
 

nixosModules/default.nix

@@ -4,6 +4,7 @@ self: {
   desktop = import ./desktop self;
   docker = import ./docker self.inputs.khepri;
   esphome-plus = import ./esphome-plus;
+  ha-plus = import ./ha-plus;
   kmscon = import ./kmscon;
   nvidia = import ./nvidia;
   plymouth = import ./plymouth;

nixosModules/ha-plus/default.nix

@@ -0,0 +1,104 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  inherit (lib) any attrValues concatMapStringsSep getExe mapAttrs' mkDefault mkDerivedConfig mkIf mkOption nameValuePair replaceStrings types;
+
+  cfg = config.services.home-assistant;
+  format = pkgs.formats.yaml {};
+  configFilesList = attrValues cfg.configFiles;
+in {
+  options.services.home-assistant = {
+    configFiles = mkOption {
+      default = {};
+      description = ''
+        Set of files that have to be linked in the configuration directory.
+      '';
+
+      type = types.attrsOf (types.submodule (
+        {
+          name,
+          config,
+          options,
+          ...
+        }: {
+          options = {
+            enable = mkOption {
+              type = types.bool;
+              default = true;
+              description = ''
+                Whether this file should be generated.  This
+                option allows specific files to be disabled.
+              '';
+            };
+
+            target = mkOption {
+              type = types.str;
+              description = ''
+                Name of symlink (relative to config directory).
+                Defaults to the attribute name.
+              '';
+            };
+
+            text = mkOption {
+              default = null;
+              type = types.nullOr types.lines;
+              description = "Text of the file.";
+            };
+
+            source = mkOption {
+              type = types.path;
+              description = "Path of the source file.";
+            };
+          };
+
+          config = {
+            target = mkDefault name;
+            source = mkIf (config.text != null) (
+              let
+                name' = "haConf-" + replaceStrings ["/"] ["-"] name;
+              in
+                mkDerivedConfig options.text (pkgs.writeText name')
+            );
+          };
+        }
+      ));
+    };
+
+    customSentences = mkOption {
+      type = types.attrsOf (types.submodule {
+        freeformType = format.type;
+        options.language = mkOption {
+          type = types.str;
+        };
+      });
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.home-assistant =
+      mkIf (
+        cfg.configFiles != {} && any (c: c.enable) configFilesList
+      ) {
+        preStart = let
+          inherit (cfg) configDir;
+          mkLink = configFile: ''
+            mkdir -p ${configDir}/${dirOf configFile.target}
+            cp -rf ${configFile.source} ${configDir}/${configFile.target}
+          '';
+        in
+          getExe (pkgs.writeShellApplication {
+            name = "home-assistant-pre-start";
+            text = concatMapStringsSep "\n" mkLink configFilesList;
+          });
+      };
+
+    services.home-assistant.configFiles = mapAttrs' (n: v:
+      nameValuePair "custom_sentences/${v.language}/${n}.yaml" {
+        source = format.generate n v;
+      })
+    cfg.customSentences;
+  };
+}