kraftkit: new module

modules/programs/kraftkit.nix

@@ -0,0 +1,50 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  inherit (lib)
+    mkEnableOption
+    mkPackageOption
+    mkOption
+    mkIf
+    literalExpression
+    ;
+
+  cfg = config.programs.kraftkit;
+  yamlFormat = pkgs.formats.yaml { };
+in
+{
+  meta.maintainers = [ lib.hm.maintainers.folliehiyuki ];
+
+  options.programs.kraftkit = {
+    enable = mkEnableOption "kraftkit - CLI to build and use customized unikernel VMs";
+
+    package = mkPackageOption pkgs "kraft" { nullable = true; };
+
+    settings = mkOption {
+      type = yamlFormat.type;
+      default = { };
+      description = ''
+        Configuration written to {file}`$XDG_CONFIG_HOME/kraftkit/config.yaml`.
+      '';
+      example = literalExpression ''
+        no_prompt = true;
+        log = {
+          level = "info";
+          type = "fancy";
+        };
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    home.packages = mkIf (cfg.package != null) [ cfg.package ];
+
+    xdg.configFile."kraftkit/config.yaml" = mkIf (cfg.settings != { }) {
+      source = yamlFormat.generate "kraftkit-config" cfg.settings;
+    };
+  };
+}