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?

  • gomp@lemmy.mlOPEnglish
    1·
    1 month 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

    • Atemu@lemmy.mlEnglish
      2·
      1 month 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.

      • gomp@lemmy.mlOPEnglish
        1·
        1 month 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)

        • Atemu@lemmy.mlEnglish
          1·
          1 month ago

          Having a record which defines exactly what to fetch is the necessary condition, not the sufficient condition.

          The actual artifacts fetched to disk must be stable, not just the record.

          • Atemu@lemmy.mlEnglish
            1·
            1 month ago

            That’d hit the source fetcher just as much. That’s an issue on a different layer.