feat(deps_nix): Add rustler precompiled overrides to deps_nix

[ferrine]

fix #20

mixNixDeps = pkgs.callPackages ./deps.nix {
    rustlerPrecompiledOverrides = {
      vega_lite_convert = {
        env.RUSTY_V8_ARCHIVE = pkgs.fetchurl {
          url = "https://github.com/denoland/rusty_v8/releases/download/v0.105.1/librusty_v8_release_x86_64-unknown-linux-gnu.a.gz";
          hash = "sha256-f7aDA74Jn2h4rp9sACGHX4DBbN6yevgWCEKdfI1fJDU=";
        };
        postInstall = ''
          # this package does not expect lib prefix
          ln -s libex_vl_convert.so $out/lib/ex_vl_convert.so
        '';
      };
    };
  };

[camelpunch]

Would you mind rebasing and resolving conflicts? Thanks for your contribution!

[ferrine]

sure

[ferrine]

just did that but the snippet concerning vega lite appeared to not just that... There is also a name of library mismatch. I do not know if it is very common, but the nif expects ex_vl_convert.so, not libex_vl_convert.so. It is possible to find a workaround using the proposed patch, but I suppose this might come from how build is organised

UPD:

I found this workaround makes the nif work

        postInstall = ''
          ln -s libex_vl_convert.so $out/lib/ex_vl_convert.so
        '';

[camelpunch]

I don't understand. Is this PR ready, or is there an issue with it that requires a workaround? Or is the issue with the current main branch?

[ferrine]

The pr is ready, the problem is package specific as far as I understand it now

[ferrine]

hi! any next steps?

[camelpunch]

I just need to get off my arse and re-read what this is about.

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[camelpunch]

So the point of this is to fix vega_lite_convert? Shouldn't we fix it so that the package 'just works', rather than requiring the user to override?

[ferrine]

This PR provides a broader perspective rather than fixing a single package, it will help to tweak any rustler binding. To fix vega specifically we need to come up with how to choose the version for v8 package since each vega version might require its own

[ferrine]

I saw there is another approach too #20 (comment)
@Makesesama wdyt?

[camelpunch]

TBH I've been focusing on making the latest versions of packages work and encouraging upgrades. I think it'll be a mammoth task to support older versions of every package.

Adding support for overrides in general makes sense to me, but will wait to hear what others think.