From 6dbd5c26e6c853f302cd9d3ed171d134ff24ffe1 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Tue, 4 Jun 2019 19:10:35 +0200
Subject: Make flake input fetching lazy

As long as the flake input is locked, it is now only fetched when it
is evaluated (e.g. "nixpkgs" is fetched when
"inputs.nixpkgs.<something>" is evaluated).

This required adding an "id" attribute to the members of "inputs" in
lockfiles, e.g.

  "inputs": {
    "nixpkgs/release-19.03": {
      "id": "nixpkgs",
      "inputs": {},
      "narHash": "sha256-eYtxncIMFVmOHaHBtTdPGcs/AnJqKqA6tHCm0UmPYQU=",
      "nonFlakeInputs": {},
      "uri": "github:edolstra/nixpkgs/e9d5882bb861dc48f8d46960e7c820efdbe8f9c1"
    }
  }

because the flake ID needs to be known beforehand to construct the
"inputs" attrset.

Fixes #2913.
---
 src/nlohmann/json_fwd.hpp | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 src/nlohmann/json_fwd.hpp

(limited to 'src/nlohmann')

diff --git a/src/nlohmann/json_fwd.hpp b/src/nlohmann/json_fwd.hpp
new file mode 100644
index 000000000..ae6e4c64f
--- /dev/null
+++ b/src/nlohmann/json_fwd.hpp
@@ -0,0 +1,10 @@
+#pragma once
+
+namespace nlohmann {
+
+struct json : basic_json<>
+{
+    using basic_json<>::basic_json;
+};
+
+}
-- 
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