From a456630a5a93db170bbc5570ae0e1a48a16cbe09 Mon Sep 17 00:00:00 2001
From: Benoit de Chezelles <benoit.dechezelles@gmail.com>
Date: Thu, 28 Oct 2021 00:56:36 +0200
Subject: Allow to disable global flake-registry with ""

---
 src/libfetchers/fetch-settings.hh | 7 ++++++-
 src/libfetchers/registry.cc       | 3 +++
 2 files changed, 9 insertions(+), 1 deletion(-)

(limited to 'src/libfetchers')

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;
-- 
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