Don't include nlohmann/json.hpp in config.hh

Instead make a separate header with the template implementation of
`BaseSetting<T>::toJSONObj` that can be included where needed

1 files changed, 15 insertions, 0 deletions

diff --git a/src/libutil/abstractsettingtojson.hh b/src/libutil/abstractsettingtojson.hh
new file mode 100644
index 000000000..b3fbc84f7
--- /dev/null
+++ b/src/libutil/abstractsettingtojson.hh
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <nlohmann/json.hpp>
+#include "config.hh"
+
+namespace nix {
+template<typename T>
+std::map<std::string, nlohmann::json> BaseSetting<T>::toJSONObject()
+{
+    auto obj = AbstractSetting::toJSONObject();
+    obj.emplace("value", value);
+    obj.emplace("defaultValue", defaultValue);
+    return obj;
+}
+}