uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/interpreters/lua-5/wrapper.nix

@@ -0,0 +1,76 @@
+{ lib, stdenv, lua, buildEnv, makeWrapper
+, extraLibs ? []
+, extraOutputsToInstall ? []
+, postBuild ? ""
+, ignoreCollisions ? false
+, requiredLuaModules
+, makeWrapperArgs ? []
+}:
+
+# Create a lua executable that knows about additional packages.
+let
+  env = let
+    paths =  requiredLuaModules (extraLibs ++ [ lua ] );
+  in buildEnv {
+    name = "${lua.name}-env";
+
+    inherit paths;
+    inherit ignoreCollisions;
+    extraOutputsToInstall = [ "out" ] ++ extraOutputsToInstall;
+
+    nativeBuildInputs = [
+      makeWrapper
+      (lua.pkgs.lua-setup-hook lua.LuaPathSearchPaths lua.LuaCPathSearchPaths)
+    ];
+
+    # we create wrapper for the binaries in the different packages
+    postBuild = ''
+      if [ -L "$out/bin" ]; then
+          unlink "$out/bin"
+      fi
+      mkdir -p "$out/bin"
+
+      addToLuaPath "$out"
+
+      # take every binary from lua packages and put them into the env
+      for path in ${lib.concatStringsSep " " paths}; do
+        nix_debug "looking for binaries in path = $path"
+        if [ -d "$path/bin" ]; then
+          cd "$path/bin"
+          for prg in *; do
+            if [ -f "$prg" ]; then
+              rm -f "$out/bin/$prg"
+              if [ -x "$prg" ]; then
+                nix_debug "Making wrapper $prg"
+                makeWrapper "$path/bin/$prg" "$out/bin/$prg" \
+                  --set-default LUA_PATH ";;" \
+                  --suffix LUA_PATH ';' "$LUA_PATH" \
+                  --set-default LUA_CPATH ";;" \
+                  --suffix LUA_CPATH ';' "$LUA_CPATH" \
+                  ${lib.concatStringsSep " " makeWrapperArgs}
+              fi
+            fi
+          done
+        fi
+      done
+    '' + postBuild;
+
+    inherit (lua) meta;
+
+    passthru = lua.passthru // {
+      interpreter = "${env}/bin/lua";
+      inherit lua;
+      env = stdenv.mkDerivation {
+        name = "interactive-${lua.name}-environment";
+        nativeBuildInputs = [ env ];
+
+        buildCommand = ''
+          echo >&2 ""
+          echo >&2 "*** lua 'env' attributes are intended for interactive nix-shell sessions, not for building! ***"
+          echo >&2 ""
+          exit 1
+        '';
+    };
+    };
+  };
+in env