infat: add module

modules/programs/infat.nix

@@ -0,0 +1,81 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.programs.infat;
+  tomlFormat = pkgs.formats.toml { };
+
+  configDir =
+    if config.xdg.enable then
+      config.xdg.configHome
+    else
+      "${config.home.homeDirectory}/Library/Application Support";
+
+  configFile = "${configDir}/infat/config.toml";
+in
+{
+  meta.maintainers = with lib.maintainers; [
+    mirkolenz
+  ];
+
+  options = {
+    programs.infat = {
+      enable = lib.mkEnableOption "infat";
+      package = lib.mkPackageOption pkgs "infat" { nullable = true; };
+      settings = lib.mkOption {
+        type = tomlFormat.type;
+        default = { };
+        example = lib.literalExpression ''
+          {
+            extensions = {
+              md = "TextEdit";
+              html = "Safari";
+              pdf = "Preview";
+            };
+            schemes = {
+              mailto = "Mail";
+              web = "Safari";
+            };
+            types = {
+              plain-text = "VSCode";
+            };
+          }
+        '';
+        description = ''
+          Configuration written to
+          {file}`$XDG_CONFIG_HOME/infat/config.toml`.
+        '';
+      };
+      autoActivate = lib.mkEnableOption "auto-activate infat" // {
+        default = true;
+        example = false;
+        description = ''
+          Automatically activate infat on startup.
+          This is useful if you want to use infat as a
+          default application handler for certain file types.
+          If you don't want this, set this to false.
+          This option is only effective if `settings` is set.
+        '';
+      };
+    };
+  };
+  config = lib.mkIf cfg.enable {
+    assertions = [
+      (lib.hm.assertions.assertPlatform "programs.infat" pkgs lib.platforms.darwin)
+    ];
+    home = {
+      packages = lib.mkIf (cfg.package != null) [ cfg.package ];
+      file.${configFile} = lib.mkIf (cfg.settings != { }) {
+        source = tomlFormat.generate "infat-settings.toml" cfg.settings;
+      };
+      activation = lib.mkIf (cfg.settings != { } && cfg.package != null && cfg.autoActivate) {
+        infat = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
+          run ${lib.getExe cfg.package} --config "${configFile}" $VERBOSE_ARG
+        '';
+      };
+    };
+  };
+}