edit: for the solution, see my comment below

I’m trying to package a go application (beszel) that bundles a bunch of html stuff built with bun (think, npm).

The html is generated by running bun install and bun run and then embedded in the go binary with //go:embed.

Being completely ignorant of the javascript ecosystem, my first idea was to just replicate what they do in the Makefile

postConfigure = ''
bun install --cwd ./site
bun run     --cwd ./site build
''

but, since bun install downloads dependencies from the net, that fails.

I guess the “clean” solution would be to look for buildNpmPackage or similar (assuming that exists) and let nix manage all the dependencies, but… it’s some 800+ dependencies (at least, bun install ... --dry-run lists 800+ things) so that’s a hard pass.

I then tried to look at how buildGoPackage handles the vendoring of dependencies, with the idea of replicating that (it dowloads what’s needed and then compare a hash of what was downloaded with a hash provided in the nix package definition), but… I can’t for the life of me decipher how nixpkgs’ pkgs/build-support/go/module.nix works.

Do you know how to implement this kind of vendoring in a nix derivation?

  • Buckshot@programming.devEnglish
    2·
    5 days ago

    Maybe someone else will have a better answer but in similar situations I’ve seen the derivation simply downloads a compiled release directly.

    I ran into the same issue trying to package silverbullet which uses deno and I gave up, later I saw it was added to nixpkgs by just downloading the github release.

    • gompOPEnglish
      1·
      5 days ago

      Found the solution (I think): basically it should just work as expected if you just add outputHashAlgo, outputHashMode and outputHash to your derivation.

      documentation
      article

      • AtemuEnglish
        2·
        5 days ago

        That will only work if it is reproducible. Given that it downloads random shit from the internet, that’s unlikely.

        To package this properly, you need to build a derivation that can use a lock file to bundle the deps into some sort of stable format. This is how go’s vendoring works.

        • gompOPEnglish
          1·
          5 days ago

          Given that it downloads random shit from the internet

          You seem to trust the javascript ecosystem just as much as I do :)

          Jokes aside, the repo has a lock file so it should actually be fine (time will tell)