From d531e723977ed1c510b224bd908d3614cb34a213 Mon Sep 17 00:00:00 2001
From: Damien Cassou <damien@cassou.me>
Date: Sun, 3 May 2020 17:23:10 +0200
Subject: [PATCH] nix-direnv: init at 1.0.0

---
 pkgs/tools/misc/nix-direnv/default.nix | 33 ++++++++++++++++++++++++++
 pkgs/top-level/all-packages.nix        |  2 ++
 2 files changed, 35 insertions(+)
 create mode 100644 pkgs/tools/misc/nix-direnv/default.nix

diff --git a/pkgs/tools/misc/nix-direnv/default.nix b/pkgs/tools/misc/nix-direnv/default.nix
new file mode 100644
index 000000000000..2d1337955009
--- /dev/null
+++ b/pkgs/tools/misc/nix-direnv/default.nix
@@ -0,0 +1,33 @@
+{ lib, stdenv, fetchFromGitHub, gnugrep, nix }:
+
+stdenv.mkDerivation rec {
+  pname = "nix-direnv";
+  version = "1.0.0";
+
+  src = fetchFromGitHub {
+    owner = "nix-community";
+    repo = "nix-direnv";
+    rev = "${version}";
+    sha256 = "1lwmg6mn3lf7s0345v53zadxn9v0x8z6pcbj90v5dx3pgrq41gs8";
+  };
+
+  # Substitute instead of wrapping because the resulting file is
+  # getting sourced, not executed:
+  postPatch = ''
+    substituteInPlace direnvrc \
+      --replace "grep" "${gnugrep}/bin/grep" \
+      --replace "nix-shell" "${nix}/bin/nix-shell" \
+      --replace "nix-instantiate" "${nix}/bin/nix-instantiate"
+  '';
+
+  installPhase = ''
+    install -m500 -D direnvrc $out/share/nix-direnv/direnvrc
+  '';
+
+  meta = with stdenv.lib; {
+    description = "A fast, persistent use_nix implementation for direnv";
+    homepage    = "https://github.com/nix-community/nix-direnv";
+    license     = licenses.mit;
+    platforms   = platforms.unix;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b7dda53484ea..7a2043b4cf5c 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2058,6 +2058,8 @@ in
 
   nfstrace = callPackage ../tools/networking/nfstrace { };
 
+  nix-direnv = callPackage ../tools/misc/nix-direnv { };
+
   nixpkgs-pytools = with python3.pkgs; toPythonApplication nixpkgs-pytools;
 
   noteshrink = callPackage ../tools/misc/noteshrink { };