1 files changed, 23 insertions, 0 deletions
diff --git a/third_party/nix/tests/plugins/plugintest.cc b/third_party/nix/tests/plugins/plugintest.cc
new file mode 100644
index 000000000000..5edd28bd099c
--- /dev/null
+++ b/third_party/nix/tests/plugins/plugintest.cc
@@ -0,0 +1,23 @@
+#include "config.hh"
+#include "primops.hh"
+
+using namespace nix;
+
+struct MySettings : Config {
+  Setting<bool> settingSet{this, false, "setting-set",
+                           "Whether the plugin-defined setting was set"};
+};
+
+MySettings mySettings;
+
+static GlobalConfig::Register rs(&mySettings);
+
+static void prim_anotherNull(EvalState& state, const Pos& pos, Value** args,
+                             Value& v) {
+  if (mySettings.settingSet)
+    mkNull(v);
+  else
+    mkBool(v, false);
+}
+
+static RegisterPrimOp rp("anotherNull", 0, prim_anotherNull);