applyPatches: passthru common src attributes (#404702)

    if patches == [ ] && prePatch == "" && postPatch == "" then

      src # nothing to do, so use original src to avoid additional drv

    else

      let

        keepAttrs = names: lib.filterAttrs (name: val: lib.elem name names);

        # enables tools like nix-update to determine what src attributes to replace

        extraPassthru = keepAttrs [

          "rev"

          "tag"

          "url"

          "outputHash"

        ] src;

      in

      stdenvNoCC.mkDerivation (

        {

          inherit

          phases = "unpackPhase patchPhase installPhase";

          installPhase = "cp -R ./ $out";

        }

        # Carry `meta` information from the underlying `src` if present.

        // (optionalAttrs (src ? meta) { inherit (src) meta; })

        # Carry and merge information from the underlying `src` if present.

        // (optionalAttrs (src ? meta || args ? meta) {

          meta = src.meta or { } // args.meta or { };

        })

        // (optionalAttrs (extraPassthru != { } || src ? passthru || args ? passthru) {

          passthru = extraPassthru // src.passthru or { } // args.passthru or { };

        })

        # Forward any additional arguments to the derviation

        // (removeAttrs args [

          "src"

          "name"

          "meta"

          "passthru"

          "patches"

          "prePatch"

          "postPatch"