1 files changed, 40 insertions, 0 deletions
diff --git a/third_party/nix/src/nix/show-config.cc b/third_party/nix/src/nix/show-config.cc
new file mode 100644
index 0000000000..86638b50d2
--- /dev/null
+++ b/third_party/nix/src/nix/show-config.cc
@@ -0,0 +1,40 @@
+#include "command.hh"
+#include "common-args.hh"
+#include "shared.hh"
+#include "store-api.hh"
+#include "json.hh"
+
+using namespace nix;
+
+struct CmdShowConfig : Command, MixJSON
+{
+    CmdShowConfig()
+    {
+    }
+
+    std::string name() override
+    {
+        return "show-config";
+    }
+
+    std::string description() override
+    {
+        return "show the Nix configuration";
+    }
+
+    void run() override
+    {
+        if (json) {
+            // FIXME: use appropriate JSON types (bool, ints, etc).
+            JSONObject jsonObj(std::cout);
+            globalConfig.toJSON(jsonObj);
+        } else {
+            std::map<std::string, Config::SettingInfo> settings;
+            globalConfig.getSettings(settings);
+            for (auto & s : settings)
+                std::cout << s.first + " = " + s.second.value + "\n";
+        }
+    }
+};
+
+static RegisterCommand r1(make_ref<CmdShowConfig>());