infra/modules/core/nix.nix
teutat3s e48fe612e2
core: add activationScript to show closure diff
This is useful when updating a host, by doing a dry-run with deploy-rs
we get a list of changed package versions.
2024-11-11 18:02:47 +01:00

67 lines
1.6 KiB
Nix

{
config,
pkgs,
lib,
flake,
...
}:
{
nixpkgs.config = lib.mkDefault {
allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [ ];
permittedInsecurePackages = [ "olm-3.2.16" ];
};
system.activationScripts.diff-closures = {
text = ''
if [[ -e /run/current-system ]]; then
${config.nix.package}/bin/nix store diff-closures \
/run/current-system "$systemConfig" \
--extra-experimental-features nix-command
fi
'';
supportsDryActivation = true;
};
nix = {
# Use default version alias for nix package
package = pkgs.nix;
gc.automatic = true;
optimise.automatic = true;
registry = {
nixpkgs.flake = flake.inputs.nixpkgs;
unstable.flake = flake.inputs.unstable;
system.flake = flake.self;
};
settings = {
# Improve nix store disk usage
auto-optimise-store = true;
# Prevents impurities in builds
sandbox = true;
# Give root and @wheel special privileges with nix
trusted-users = [
"root"
"@wheel"
];
# Allow only group wheel to connect to the nix daemon
allowed-users = [ "@wheel" ];
};
# Generally useful nix option defaults
extraOptions = lib.mkForce ''
experimental-features = flakes nix-command
min-free = 536870912
keep-outputs = true
keep-derivations = true
fallback = true
'';
nixPath = [
"nixpkgs=${flake.inputs.nixpkgs}"
"nixos-config=${../../lib/compat/nixos}"
"home-manager=${flake.inputs.home-manager}"
];
};
}