From 6418e349710762b834d91d56da8fc5d8eae04f51 Mon Sep 17 00:00:00 2001
From: Samuel Dionne-Riel <samuel@dionne-riel.com>
Date: Wed, 23 Jan 2019 13:32:09 -0500
Subject: [PATCH] nix-universal-prefetch: init at 0.2.0 (#53436)

---
 .../nix-universal-prefetch/default.nix        | 32 +++++++++++++++++++
 pkgs/top-level/all-packages.nix               |  2 ++
 2 files changed, 34 insertions(+)
 create mode 100644 pkgs/tools/package-management/nix-universal-prefetch/default.nix

diff --git a/pkgs/tools/package-management/nix-universal-prefetch/default.nix b/pkgs/tools/package-management/nix-universal-prefetch/default.nix
new file mode 100644
index 000000000000..a4e43f149677
--- /dev/null
+++ b/pkgs/tools/package-management/nix-universal-prefetch/default.nix
@@ -0,0 +1,32 @@
+{ stdenv
+, fetchFromGitHub
+, ruby
+}:
+
+# No gems used, so mkDerivation is fine.
+stdenv.mkDerivation rec {
+  pname = "nix-universal-prefetch";
+  version = "0.2.0";
+
+  src = fetchFromGitHub {
+    owner = "samueldr";
+    repo = "nix-universal-prefetch";
+    rev = "v${version}";
+    sha256 = "1id9iaibrm2d3fa9dkcxnb3sd0j1vh502181gdd199a1cfsmzh1i";
+  };
+
+  installPhase = ''
+    mkdir -pv $out/bin
+    cp nix-universal-prefetch $out/bin/nix-universal-prefetch
+    substituteInPlace "$out/bin/nix-universal-prefetch" \
+      --replace "/usr/bin/env nix-shell" "${ruby}/bin/ruby"
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Uses nixpkgs fetchers to figure out hashes";
+    homepage = https://github.com/samueldr/nix-universal-prefetch;
+    license = licenses.mit;
+    maintainers = with maintainers; [ samueldr ];
+    platforms = platforms.linux ++ platforms.darwin;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b85d742b5c33..474778afa5d5 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -22689,6 +22689,8 @@ in
 
   nix-top = callPackage ../tools/package-management/nix-top { };
 
+  nix-universal-prefetch = callPackage ../tools/package-management/nix-universal-prefetch { };
+
   nix-repl = throw (
     "nix-repl has been removed because it's not maintained anymore, " +
     (lib.optionalString (! lib.versionAtLeast "2" (lib.versions.major builtins.nixVersion))