Add dotfiles

modules/core/nix.nix

@@ -0,0 +1,98 @@
+{
+  config,
+  pkgs,
+  lib,
+  inputs,
+  ...
+}: {
+  environment = {
+    # set channels (backwards compatibility)
+    etc = {
+      "nix/flake-channels/nixpkgs".source = inputs.nixpkgs;
+      "nix/flake-channels/home-manager".source = inputs.home-manager;
+    };
+
+    systemPackages = with pkgs; [git deadnix alejandra statix];
+    defaultPackages = [];
+  };
+
+  nixpkgs = {
+    config = {
+      allowUnfree = false;
+      allowBroken = true;
+    };
+  };
+
+  # faster rebuilding
+  documentation = {
+    enable = true;
+    doc.enable = false;
+    man.enable = true;
+    dev.enable = false;
+  };
+
+  nix = {
+    gc = {
+      automatic = true;
+      dates = "daily";
+      options = "--delete-older-than 3d";
+    };
+    package = pkgs.nixUnstable;
+
+    # Make builds run with low priority so my system stays responsive
+    daemonCPUSchedPolicy = "idle";
+    daemonIOSchedClass = "idle";
+
+    # pin the registry to avoid downloading and evaling a new nixpkgs version every time
+    registry = lib.mapAttrs (_: v: {flake = v;}) inputs;
+
+    # This will additionally add your inputs to the system's legacy channels
+    # Making legacy nix commands consistent as well, awesome!
+    nixPath = lib.mapAttrsToList (key: value: "${key}=${value.to.path}") config.nix.registry;
+
+    # Free up to 1GiB whenever there is less than 100MiB left.
+    extraOptions = ''
+      experimental-features = nix-command flakes
+      keep-outputs = true
+      warn-dirty = false
+      keep-derivations = true
+      min-free = ${toString (100 * 1024 * 1024)}
+      max-free = ${toString (1024 * 1024 * 1024)}
+      use-xdg-base-directories = true
+    '';
+    settings = {
+      auto-optimise-store = true;
+      # use binary cache, its not gentoo
+      builders-use-substitutes = true;
+      # allow sudo users to mark the following values as trusted
+      allowed-users = ["@wheel"];
+      # only allow sudo users to manage the nix store
+      trusted-users = ["@wheel"];
+      sandbox = true;
+      max-jobs = "auto";
+      # continue building derivations if one fails
+      keep-going = true;
+      log-lines = 20;
+      extra-experimental-features = ["flakes" "nix-command" "recursive-nix" "ca-derivations"];
+
+      # use binary cache, its not gentoo
+      substituters = [
+        "https://cache.nixos.org"
+        "https://nix-community.cachix.org"
+        "https://nixpkgs-unfree.cachix.org"
+        "https://oxalica.cachix.org"
+        "https://hyprland.cachix.org"
+      ];
+
+      trusted-public-keys = [
+        "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+        "nixpkgs-unfree.cachix.org-1:hqvoInulhbV4nJ9yJOEr+4wxhDV4xq2d1DK7S6Nj6rs="
+        "oxalica.cachix.org-1:h0iRBw6tQD8+51ZvnNEBPbwLR58UD7klauDBWzBdugQ="
+        "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
+      ];
+    };
+  };
+  system.autoUpgrade.enable = false;
+  system.stateVersion = "23.05"; # DONT TOUCH THIS
+}