mkStandardFeature: fix method of overriding home-manager option

This reverts commit 6f0af993ba.

flake.nix

@@ -15,7 +15,7 @@
 
     mkSymlinkActivationScript = {target, source}: ''
       if [ -e ${source} ]; then
-        if [ -e ${target} ]; then
+        if [ -L ${target} ] || [ -e ${target} ]; then
           rm -rf ${target}
         fi
         ln -s ${source} ${target}
@@ -51,12 +51,30 @@
       flake.homeModules.${moduleName} = func;
     };
 
+    mkStandardFeature = {
+      flakeModule = moduleName: optionName: optionString: (mkMirroredModulesFlakeModule "${moduleName}Options" ({ lib, ... }: {
+        options = setAttrByStrPath optionName (lib.mkEnableOption optionString);
+      }));
+
+      nixosModule = { config, optionName }: systemConfig: {
+        config = lib.mkIf (attrByStrPath optionName config) (mkIfElse (config.features.nixos.home-manager.enable) {
+          home-manager.users.${config.info.userName} = setAttrByStrPath optionName (lib.mkDefault true);
+        } systemConfig);
+      };
+
+      homeModule = { config, optionName }: homeConfig: {
+        config = lib.mkIf (attrByStrPath optionName config) homeConfig;
+      };
+    };
+
     mkRedundantOptionDescription = name: value: "The functionality of this option completely depends on `${name}` being `${value}`, and will not be evaluated otherwise.";
 
-    mkRedundantOptionAttrs = name: value: attrs: {
+    mkRedundantOption = name: value: attrs: lib.mkOption {
       inherit (attrs) type default;
       description = ''
         ${attrs.description}
+        
+        
         ${mkRedundantOptionDescription name value}
       '';
     };