From 2aab84453d9517a8a954905b3f2ce372dfd01266 Mon Sep 17 00:00:00 2001
From: Sebastien Bourdeauducq <sb@m-labs.hk>
Date: Sat, 9 Feb 2019 14:44:32 +0800
Subject: [PATCH] nix: commit missing file

---
 nix/fetchcargo.nix | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 nix/fetchcargo.nix

diff --git a/nix/fetchcargo.nix b/nix/fetchcargo.nix
new file mode 100644
index 000000000..6195a7238
--- /dev/null
+++ b/nix/fetchcargo.nix
@@ -0,0 +1,35 @@
+{ stdenv, cacert, git, cargo, cargo-vendor }:
+{ name, src, sha256 }:
+stdenv.mkDerivation {
+  name = "${name}-vendor";
+  nativeBuildInputs = [ cacert git cargo cargo-vendor ];
+  inherit src;
+
+  phases = "unpackPhase patchPhase installPhase";
+
+  installPhase = ''
+    if [[ ! -f Cargo.lock ]]; then
+        echo
+        echo "ERROR: The Cargo.lock file doesn't exist"
+        echo
+        echo "Cargo.lock is needed to make sure that cargoSha256 doesn't change"
+        echo "when the registry is updated."
+        echo
+
+        exit 1
+    fi
+
+    export CARGO_HOME=$(mktemp -d cargo-home.XXX)
+
+    cargo vendor
+
+    cp -ar vendor $out
+  '';
+
+  outputHashAlgo = "sha256";
+  outputHashMode = "recursive";
+  outputHash = sha256;
+
+  impureEnvVars = stdenv.lib.fetchers.proxyImpureEnvVars;
+  preferLocalBuild = true;
+}