From 52419f8db3ed4806f8114a98f94a68f3b249f065 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Mon, 11 Feb 2019 13:01:39 +0100
Subject: [PATCH] Add flake registry

This will eventually be moved to nixos.org.
---
 flake-registry.json          | 11 +++++++++++
 local.mk                     |  2 ++
 src/libexpr/primops/flake.cc |  8 ++++++--
 3 files changed, 19 insertions(+), 2 deletions(-)
 create mode 100644 flake-registry.json

diff --git a/flake-registry.json b/flake-registry.json
new file mode 100644
index 000000000..b850daa74
--- /dev/null
+++ b/flake-registry.json
@@ -0,0 +1,11 @@
+{
+    "version": 1,
+    "flakes": {
+        "dwarffs": {
+            "uri": "github:edolstra/dwarffs/flake"
+        },
+        "nixpkgs": {
+            "uri": "github:edolstra/nixpkgs/flake"
+        }
+    }
+}
diff --git a/local.mk b/local.mk
index 4b380176f..11ed9c0a6 100644
--- a/local.mk
+++ b/local.mk
@@ -10,3 +10,5 @@ GLOBAL_CXXFLAGS += -I . -I src -I src/libutil -I src/libstore -I src/libmain -I
 
 $(foreach i, config.h $(call rwildcard, src/lib*, *.hh), \
   $(eval $(call install-file-in, $(i), $(includedir)/nix, 0644)))
+
+$(eval $(call install-data-in,$(d)/flake-registry.json,$(datadir)/nix))
diff --git a/src/libexpr/primops/flake.cc b/src/libexpr/primops/flake.cc
index 81e912402..1367fa420 100644
--- a/src/libexpr/primops/flake.cc
+++ b/src/libexpr/primops/flake.cc
@@ -17,15 +17,19 @@ const EvalState::FlakeRegistry & EvalState::getFlakeRegistry()
 
         if (!evalSettings.pureEval) {
 
+#if 0
             auto registryUri = "file:///home/eelco/Dev/gists/nix-flakes/registry.json";
 
             auto registryFile = getDownloader()->download(DownloadRequest(registryUri));
+#endif
 
-            auto json = nlohmann::json::parse(*registryFile.data);
+            auto registryFile = readFile(settings.nixDataDir + "/nix/flake-registry.json");
+
+            auto json = nlohmann::json::parse(registryFile);
 
             auto version = json.value("version", 0);
             if (version != 1)
-                throw Error("flake registry '%s' has unsupported version %d", registryUri, version);
+                throw Error("flake registry '%s' has unsupported version %d", registryFile, version);
 
             auto flakes = json["flakes"];
             for (auto i = flakes.begin(); i != flakes.end(); ++i) {