lib/generators: toSwayConf init

modules/lib/generators.nix

@@ -1,6 +1,35 @@
 { lib }:
 
 {
+  toSwayConf = { outerBlock ? true, indent ? "", indentSpace ? "  " }@args:
+    v:
+    let
+      outroSpace = "\n" + lib.strings.removeSuffix indentSpace indent;
+      outro = outroSpace + lib.optionalString (!outerBlock) "}";
+      intro = lib.optionalString (!outerBlock) ''
+        {
+      '' + indent;
+
+      innerArgs = args // {
+        outerBlock = false;
+        indent = indent + indentSpace;
+      };
+      genInner = key: value:
+        builtins.toString key + indentSpace
+        + lib.hm.generators.toSwayConf innerArgs value;
+      concatItems = lib.concatStringsSep ''
+
+        ${indent}'';
+    in if lib.isInt v || lib.isFloat v || lib.isString v then
+      (builtins.toString v)
+    else if lib.isAttrs v then
+      (if v == { } then
+        abort "toSwayConfig: empty attribute set is unsupported"
+      else
+        intro + concatItems (lib.mapAttrsToList genInner v) + outro)
+    else
+      (abort "toSwayConfig: type ${builtins.typeOf v} is unsupported");
+
   toHyprconf = { attrs, indentLevel ? 0, importantPrefixes ? [ "$" ], }:
     let
       inherit (lib)