Allow to disable global flake-registry with ""

2 files changed, 9 insertions, 1 deletions

diff --git a/src/libfetchers/fetch-settings.hh b/src/libfetchers/fetch-settings.hh
index 6452143a1..f33cbdcfc 100644
--- a/src/libfetchers/fetch-settings.hh
+++ b/src/libfetchers/fetch-settings.hh
@@ -71,7 +71,12 @@ struct FetchSettings : public Config
         "Whether to warn about dirty Git/Mercurial trees."};
 
     Setting<std::string> flakeRegistry{this, "https://channels.nixos.org/flake-registry.json", "flake-registry",
-        "Path or URI of the global flake registry."};
+        R"(
+          Path or URI of the global flake registry.
+
+          When empty, disables the global flake registry.
+        )"};
+
 
     Setting<bool> useRegistries{this, true, "use-registries",
         "Whether to use flake registries to resolve flake references."};
diff --git a/src/libfetchers/registry.cc b/src/libfetchers/registry.cc
index acd1ff866..43c03beec 100644
--- a/src/libfetchers/registry.cc
+++ b/src/libfetchers/registry.cc
@@ -153,6 +153,9 @@ static std::shared_ptr<Registry> getGlobalRegistry(ref<Store> store)
 {
     static auto reg = [&]() {
         auto path = fetchSettings.flakeRegistry.get();
+        if (path == "") {
+            return std::make_shared<Registry>(Registry::Global); // empty registry
+        }
 
         if (!hasPrefix(path, "/")) {
             auto storePath = downloadFile(store, path, "flake-registry.json", false).storePath;