Add augeas, configuration editing tool

pkgs/tools/system/augeas/default.nix

···
+{ stdenv, fetchurl, pkgconfig, readline, libxml2 }:
+
+stdenv.mkDerivation rec {
+  name = "augeas-${version}";
+  version = "1.2.0";
+
+  src = fetchurl {
+    url = "http://download.augeas.net/${name}.tar.gz";
+    sha256 = "1q41yilxc0nvjz5h9phm38k2b73k2v0b9jg11y92228bps7b5bpl";
+  };
+
+  buildInputs = [ pkgconfig readline libxml2 ];
+
+  meta = with stdenv.lib; {
+    description = "Configuration editing tool.";
+    license = licenses.lgpl2;
+    homepage = http://augeas.net/;
+    maintainers = with maintainers; [offline];
+    platforms = with platforms; unix;
+  };
+}

pkgs/top-level/all-packages.nix

···
 
   ### DEVELOPMENT / TOOLS
 
+  augeas = callPackage ../tools/system/augeas { };
+
   ansible = callPackage ../tools/system/ansible { };
 
   antlr = callPackage ../development/tools/parsing/antlr/2.7.7.nix { };