Remove cleanSourceWith from features list

[lukateras]

gitignoreSource does not compose with cleanSourceWith as of 6e75696.

See discussion in #11. Another way to resolve this is to make cleanSourceWith compose one way only, with gitignoreSource always having to be the final filter (based on @yorickvP's workaround):

{ lib ? import <nixpkgs/lib> }:
let
  find-files = import ./find-files.nix { inherit lib; };

  constantSource = path:
    if path ? _isLibCleanSourceWith
    then builtins.path {
      name = "source";
      inherit (path) filter;
      path = path.origSrc;
    }
    else builtins.path {
      name = "source";
      inherit path;
    };
in
{
  inherit (find-files) gitignoreFilter;

  gitignoreSource = path:
    constantSource (lib.cleanSourceWith {
      filter = find-files.gitignoreFilter path;
      src = path;
    });
}

The problem with this is that it's not intuitive and still results in API breakage, while there are other ways to compose filters that are more explicit and work with deterministic source names.

[roberth]

Thanks! I've merged it to reflect the current situation.
I'm confident that this can be fixed properly, see #15

[lukateras]

Sounds great! I assume the general idea is to make sure that cleanSourceWith produces deterministic store paths or works with builtins.path in its src. Looking forward to #15 :3