Adding a Common Lisp wrapper.

Features:
  + configurable via environment variables
  + can skip the actual launching of the lisp implementation (source it
  with NIX_LISP_SKIP_CODE=1 to get all the settings)
  + currently supports SBCL, CLisp, ECL
  + determines lisp implementation from NIX_LISP_COMMAND variable or
  from buildInputs
  + sets ASDF search path for packages using buildInputs

pkgs/development/lisp-modules/clwrapper/default.nix

@@ -0,0 +1,28 @@
+{stdenv, fetchurl, asdf, lisp ? null}:
+stdenv.mkDerivation {
+  name = "cl-wrapper-script";
+
+  buildPhase="";
+
+  installPhase=''
+    mkdir -p "$out"/bin
+    cp ${./cl-wrapper.sh} "$out"/bin/cl-wrapper.sh
+    cp ${./common-lisp.sh} "$out"/bin/common-lisp.sh
+    chmod a+x "$out"/bin/*
+  '';
+
+  inherit asdf lisp;
+
+  setupHook = ./setup-hook.sh;
+
+  phases="installPhase fixupPhase";
+
+  passthru = {
+    inherit lisp;
+  };
+
+  meta = {
+    description = ''Script used to wrap Common Lisp implementations'';
+    maintainers = [stdenv.lib.maintainers.raskin];
+  };
+}