#!/usr/bin/env -S nix eval --json --file
let
  caches = {
    # lower ?priority=x numbers go first, will fallback to https://.../nix-cache-info if unset, final fallback is the default 0
    # https://nix.dev/manual/nix/latest/command-ref/conf-file#conf-substituters
    # https://nix.dev/manual/nix/latest/command-ref/conf-file#conf-trusted-public-keys

    # https://cache.nixos.org/nix-cache-info (WantMassQuery: 1, priority: 40)
    "https://cache.nixos.org/" = [
      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
    ];

    # https://nix-community.cachix.org/nix-cache-info (WantMassQuery: 1, priority: 41)
    "https://nix-community.cachix.org/" = [
      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
    ];

    # # dead? https://github.com/numtide/nixpkgs-unfree/commit/399ae17bda97a0318a0c5316edb169d097a776dc
    # # https://numtide.cachix.org/nix-cache-info (WantMassQuery: 1, priority: 41)
    # "https://numtide.cachix.org/" = [
    #   "numtide.cachix.org-1:2ps1kLBUWjxIneOy1Ik6cQjb41X0iXVXeHigGmycPPE="
    # ];

    # https://flox.dev/blog/flox-the-nix-foundation-and-nvidia-partner-for-cuda/
    # https://cache.flox.dev/nix-cache-info (no WantMassQuery, no priority(!!!))
    "https://cache.flox.dev/?priority=45" = [
      "flox-cache-public-1:7F4OyH7ZCnFhcze3fJdfyXYLQw/aV7GEed86nQ7IsOs="
    ];

    # me!
    # "https://cache-proxy.pbsds.net/?priority=35" = [ ];
  };
in

{
  nix.settings = {
    # nixos will add the public binary cache as well with a mkAfter, unless we mkForce these
    substituters = builtins.attrNames caches;
    trusted-substituters = builtins.attrNames caches;
    trusted-public-keys = builtins.concatLists (builtins.attrValues caches);
  };
}