`inputs.self` has no `outPath` attribute

[acid-bong]

AFAIU, flakes generate self.outPath by using either "${dirOf ./flake.nix}" or fetch[Git|Mercurial] (dirOf ./flake.nix) (or analogies of such). Would it be possible/make sense for with-inputs to add this?

[vic]

I don't currently have much access to my laptop, but I'd be surprised if we did not have self.outPath, can you verify and a failing test ? We should have a test that checks self.outPath is present, if that is not currently the case, PR is very welcome :)

[acid-bong]

wdym surprised? currently with-inputs isn't even supposed to resolve self as a flake, only outputs top-level with separate outputs and inputs:

with-inputs/with-inputs.nix

Lines 146 to 150 in dae6b81

	# self exposes .inputs and .outputs like a real flake self, with all
	# output attributes merged at top level for direct attribute access.
	self = outputs // {
	inherit inputs outputs;
	};

funnily enough, the workaround is to set a top-level output outPath = ./.;; or, in flake-parts:

          options.flake.outPath = inputs.nixpkgs.lib.mkOption {
            type = inputs.nixpkgs.lib.types.path;
            default = ./.;
          };

[jbgi]

Fix (at least for the from.* api cases) in #18.