reap: init at 0.3-unreleased

There are two extra commits on master which this includes in addition
to 0.2.

pkgs/os-specific/linux/reap/default.nix

@@ -0,0 +1,27 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "reap";
+  version = "0.3-unreleased";
+
+  src = fetchFromGitHub {
+    owner = "leahneukirchen";
+    repo = "reap";
+    rev = "0e68d09804fb9ec82af37045fb37c2ceefa391d5";
+    hash = "sha256-4Bv7stW5PKcODQanup37YbiUWrEGR6BuSFXibAHmwn0=";
+  };
+
+  makeFlags = [ "PREFIX=${placeholder "out"}" ];
+
+  postInstall = ''
+    install -dm755 "$out/share/licenses/reap/"
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/leahneukirchen/reap";
+    description = "run process until all its spawned processes are dead ";
+    license = with licenses; [ publicDomain ];
+    platforms = platforms.linux;
+    maintainers = [ maintainers.leahneukirchen ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -23327,6 +23327,8 @@ with pkgs;
 
   raspberrypi-armstubs = callPackage ../os-specific/linux/firmware/raspberrypi/armstubs.nix {};
 
+  reap = callPackage ../os-specific/linux/reap { };
+
   regionset = callPackage ../os-specific/linux/regionset { };
 
   rfkill_udev = callPackage ../os-specific/linux/rfkill/udev.nix { };