nix: use rust-overlay for toolchain pinning

To ensure the Nix derivations are using the correct toolchain, defined in the rust-toolchain file, use the rust-overlay library.

Also remove the fenix input, since this was actually never used and was an artefact of some copy-paste shenanigans.

nix: add rad-web app

To allow for Nix users to install rad-web easily, add the package to the set of packages and apps.

Adding rad-web alone does not look useful. rad-web needs radicle-httpd to function and the radicle-httpd output already provides rad-web along with radicle-httpd.

It would be more important to provide a radicle-full output that includes both, radicle and radicle-httpd outputs.

Ya, that’s fair. I just realised I never added radicle-httpd to my NixOS setup and that’s why I was missing rad-web.

Do you have any pointers for how a flake can package multiple binaries under a single name? I’ve tried searching and messing around with it myself but not coming up with anything useful :(

I figured out I’d accidentally run nixos-rebuild boot instead of switch which was why it wasn’t working for me. I’m not sure if there’s a helper for it or not, but you can make a derivation that just copies the results of the other two in installPhase. e.g.

stdenv.mkDerivation {
  pname = "radicle-client";
  version = ...;
  unpackPhase = "true";
  installPhase = ''
    mkdir -p $out/bin
    cp ${radicle-cli}/bin/* $out/bin
    cp ${radicle-httpd}/bin/* $out/bin
  '';
}

Use buildEnv to merge radicle and radicle-httpd outputs

The canonical way to merge multiple packages into one is buildEnv.

Rebase.

Rebase.