Refer to data-files from parent directory

[shivaraj-bh]

For a project with the following structure:

 .
├──  cabal.project
├──  data.txt
├──  pkg1
│   └──  pkg1.cabal
└──  pkg2
    └──  pkg2.cabal

IIUC sub-packages cannot access files in parent directory by design, what are the alternatives that doesn’t involve copying the data.txt to every sub-package?

[roberth]

Such a project structure is not compatible with hackage either, if that is a goal for you.
Is cabal-install happy about something like data-files: ../data.txt?
If so, I wouldn't be surprised if cabal2nix needs changes to support that.
I haven't tried this.

[shivaraj-bh]

cabal-install doesn’t complain about it

[srid]

doesn’t involve copying the data.txt to every sub-package?

You don't need to duplicate it in git repo, but you can copy it as part of the source derivations, by overriding:

haskell-flake/nix/modules/project/packages/package.nix

Lines 16 to 24 in 66dcee2

	source = mkOption {
	type = with types; either path str;
	description = ''
	Source refers to a Haskell package defined by one of the following:
	- Path containing the Haskell package's `.cabal` file.
	- Hackage version string
	'';
	};