Fix .flags deprecation

Author: viperML

modules/common-wrapper.nix

@@ -34,9 +34,14 @@ in
       type = flagsType;
       default = [ ];
       description = "(Deprecated) Flags passed before any arguments to the wrapped program. Use prependFlags instead";
-      apply = throw "The option `${lib.showOption [ "flags" ]}' used in ${lib.showFiles options.flags.files} is deprecated. Use `${
-        lib.showOption [ "prependFlags" ]
-      }' instead.";
+      apply =
+        flags:
+        if flags == [ ] then
+          [ ]
+        else
+          throw "The option `${lib.showOption [ "flags" ]}' used in ${lib.showFiles options.flags.files} is deprecated. Use `${
+            lib.showOption [ "prependFlags" ]
+          }' instead.";
     };
     prependFlags = mkOption {
       type = flagsType;

tests/multi.nix

@@ -15,6 +15,9 @@ wrapper-manager.lib {
         basePackage = pkgs.discord;
 
         env.NIXOS_OZONE_WL.value = "1";
+        prependFlags = [
+          "--disable-gpu"
+        ];
       };
 
       wrappers.hello = {
@@ -36,13 +39,13 @@ wrapper-manager.lib {
         basePackage = pkgs.zellij;
       };
 
-      # wrappers.hello-bad = {
-      #   basePackage = pkgs.hello;
-      #   flags = [
-      #     "-g"
-      #     "g"
-      #   ];
-      # };
+      wrappers.hello-bad = {
+        basePackage = pkgs.hello;
+        flags = [
+          "-g"
+          "g"
+        ];
+      };
 
       wrappers.neofetch = {
         basePackage = pkgs.neofetch.override { x11Support = false; };