nodeinfo: make extensible

[erikarvstedt]

Copy of commit msg

Module authors can now add extra services via option nix-bitcoin.nodeinfo.services.
Mark as internal because we're not yet providing a user-friendly, stable API.

Test this with:

read -d '' config <<'EOF' || :
{ config, ... }: {
  options = {
    services.myservice.enable = mkOption { default = true; };
  };

  config = {
    services.electrs.enable = true;
    services.clightning.enable = true;

    nix-bitcoin.nodeinfo = {
      enable = true;
      services = {
        myservice = _: _: ''
          infos["myservice"] = "example output"
        '';
      };
    };
  };
}
EOF
run-tests.sh -s "$config" container --run c nodeinfo

[jonasnick]

That's pretty nice!

ACK f17fceb