Move enabled experimental feature to libutil struct

This is needed in subsequent commits to allow the settings and CLI args
infrastructure itself to read this setting.

6 files changed, 10 insertions, 7 deletions

diff --git a/src/nix/develop.cc b/src/nix/develop.cc
index f06ade008..17993874b 100644
--- a/src/nix/develop.cc
+++ b/src/nix/develop.cc
@@ -208,7 +208,7 @@ static StorePath getDerivationEnvironment(ref<Store> store, ref<Store> evalStore
     drv.name += "-env";
     drv.env.emplace("name", drv.name);
     drv.inputSrcs.insert(std::move(getEnvShPath));
-    if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations)) {
+    if (experimentalFeatureSettings.isEnabled(Xp::CaDerivations)) {
         for (auto & output : drv.outputs) {
             output.second = DerivationOutput::Deferred {},
             drv.env[output.first] = hashPlaceholder(output.first);
diff --git a/src/nix/flake.cc b/src/nix/flake.cc
index 0a6616396..395180267 100644
--- a/src/nix/flake.cc
+++ b/src/nix/flake.cc
@@ -1328,7 +1328,7 @@ struct CmdFlake : NixMultiCommand
     {
         if (!command)
             throw UsageError("'nix flake' requires a sub-command.");
-        settings.requireExperimentalFeature(Xp::Flakes);
+        experimentalFeatureSettings.require(Xp::Flakes);
         command->second->run();
     }
 };
diff --git a/src/nix/main.cc b/src/nix/main.cc
index 7b715f281..da920615f 100644
--- a/src/nix/main.cc
+++ b/src/nix/main.cc
@@ -297,7 +297,10 @@ void mainWrapped(int argc, char * * argv)
     }
 
     if (argc == 2 && std::string(argv[1]) == "__dump-builtins") {
-        settings.experimentalFeatures = {Xp::Flakes, Xp::FetchClosure};
+        experimentalFeatureSettings.experimentalFeatures = {
+            Xp::Flakes,
+            Xp::FetchClosure,
+        };
         evalSettings.pureEval = false;
         EvalState state({}, openStore("dummy://"));
         auto res = nlohmann::json::object();
@@ -366,7 +369,7 @@ void mainWrapped(int argc, char * * argv)
     if (args.command->first != "repl"
         && args.command->first != "doctor"
         && args.command->first != "upgrade-nix")
-        settings.requireExperimentalFeature(Xp::NixCommand);
+        experimentalFeatureSettings.require(Xp::NixCommand);
 
     if (args.useNet && !haveInternet()) {
         warn("you don't have Internet access; disabling some network-dependent features");
diff --git a/src/nix/realisation.cc b/src/nix/realisation.cc
index 13db80282..e19e93219 100644
--- a/src/nix/realisation.cc
+++ b/src/nix/realisation.cc
@@ -45,7 +45,7 @@ struct CmdRealisationInfo : BuiltPathsCommand, MixJSON
 
     void run(ref<Store> store, BuiltPaths && paths) override
     {
-        settings.requireExperimentalFeature(Xp::CaDerivations);
+        experimentalFeatureSettings.require(Xp::CaDerivations);
         RealisedPath::Set realisations;
 
         for (auto & builtPath : paths) {
diff --git a/src/nix/registry.cc b/src/nix/registry.cc
index 1f4f820ac..cb94bbd31 100644
--- a/src/nix/registry.cc
+++ b/src/nix/registry.cc
@@ -224,7 +224,7 @@ struct CmdRegistry : virtual NixMultiCommand
 
     void run() override
     {
-        settings.requireExperimentalFeature(Xp::Flakes);
+        experimentalFeatureSettings.require(Xp::Flakes);
         if (!command)
             throw UsageError("'nix registry' requires a sub-command.");
         command->second->run();
diff --git a/src/nix/repl.cc b/src/nix/repl.cc
index 51d3074b4..1b329f1a6 100644
--- a/src/nix/repl.cc
+++ b/src/nix/repl.cc
@@ -37,7 +37,7 @@ struct CmdRepl : RawInstallablesCommand
 
     void applyDefaultInstallables(std::vector<std::string> & rawInstallables) override
     {
-        if (!settings.isExperimentalFeatureEnabled(Xp::ReplFlake) && !(file) && rawInstallables.size() >= 1) {
+        if (!experimentalFeatureSettings.isEnabled(Xp::ReplFlake) && !(file) && rawInstallables.size() >= 1) {
             warn("future versions of Nix will require using `--file` to load a file");
             if (rawInstallables.size() > 1)
                 warn("more than one input file is not currently supported");