jrnl: add module (#7652)

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>

modules/programs/jrnl.nix

@@ -0,0 +1,36 @@
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}:
+
+let
+  cfg = config.programs.jrnl;
+  yamlFormat = pkgs.formats.yaml { };
+in
+with lib;
+{
+  options.programs.jrnl = {
+    enable = mkEnableOption "jrnl";
+
+    package = lib.mkPackageOption pkgs "jrnl" { nullable = true; };
+
+    settings = mkOption {
+      type = yamlFormat.type;
+      default = { };
+      description = ''
+        Configuration for the jrnl binary.
+        Available configuration options are described in the jrnl documentation:
+        <https://jrnl.sh/en/stable/reference-config-file/>.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    home.packages = mkIf (cfg.package != null) [ cfg.package ];
+    xdg.configFile."jrnl/jrnl.yaml".source = yamlFormat.generate "jrnl.yaml" cfg.settings;
+  };
+
+  meta.maintainers = [ lib.maintainers.matthiasbeyer ];
+}