I dived into the [hex.pm](https://hex.pm/) (Erlang package manager) ecosystem and found that we can list it like this:
- Iterate through the package API https://hex.pm/api/packages/ (pass `?page=n` for pagination)
- To get a list of released versions for each pkg, extract `pkg["releases"][i]["version"]` where `i` is the ith release.
- Now combine these versions with the package name in based on the format: `https://repo.hex.pm/tarballs/{pkg_name}-{pkg_version}.tar`
- Send these urls to the tar loader along with extra metadata.
- For the `last_update` value, we can use `pkg["updated_at"]`
Sample tar link: https://repo.hex.pm/tarballs/jason-1.4.0.tar
References:
- [Hex.pm specs](https://github.com/hexpm/specifications)
- [Hex CLI source code](https://github.com/hexpm/hex)
- [Hex.pm source code](https://github.com/hexpm/hexpm)