Add gzrt, gzip Recovery Toolkit

pkgs/tools/compression/gzrt/default.nix

@@ -0,0 +1,23 @@
+{ stdenv, fetchurl, zlib }:
+
+stdenv.mkDerivation rec {
+  name = "gzrt-0.8";
+
+  src = fetchurl {
+    url = "http://www.urbanophile.com/arenn/coding/gzrt/${name}.tar.gz";
+    sha256 = "1vhzazj47xfpbfhzkwalz27cc0n5gazddmj3kynhk0yxv99xrdxh";
+  };
+
+  buildInputs = [ zlib ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp gzrecover $out/bin
+  '';
+
+  meta = {
+    homepage = http://www.urbanophile.com/arenn/hacking/gzrt/;
+    description = "The gzip Recovery Toolkit";
+    license = stdenv.lib.licenses.gpl3;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -1060,6 +1060,8 @@ let
 
   gzip = callPackage ../tools/compression/gzip { };
 
+  gzrt = callPackage ../tools/compression/gzrt { };
+
   partclone = callPackage ../tools/backup/partclone { };
 
   partimage = callPackage ../tools/backup/partimage { };