95 lines
3.4 KiB
Nix
95 lines
3.4 KiB
Nix
{ lib, pkgs, ... }:
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{
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imports = [
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./feeds.nix
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./fs.nix
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./hardware
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./home
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./hosts.nix
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./ids.nix
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./machine-id.nix
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./net.nix
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./nix-path
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./persist.nix
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./programs
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./secrets.nix
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./ssh.nix
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./users
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./vpn.nix
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];
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sane.nixcache.enable-trusted-keys = true;
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sane.nixcache.enable = lib.mkDefault true;
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sane.persist.enable = lib.mkDefault true;
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sane.programs.sysadminUtils.enableFor.system = lib.mkDefault true;
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sane.programs.consoleUtils.enableFor.user.colin = lib.mkDefault true;
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nixpkgs.config.allowUnfree = true;
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nixpkgs.config.allowBroken = true; # NIXPKGS_ALLOW_BROKEN
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# time.timeZone = "America/Los_Angeles";
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time.timeZone = "Etc/UTC"; # DST is too confusing for me => use a stable timezone
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# allow `nix flake ...` command
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# TODO: is this still required?
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nix.extraOptions = ''
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experimental-features = nix-command flakes
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'';
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# hardlinks identical files in the nix store to save 25-35% disk space.
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# unclear _when_ this occurs. it's not a service.
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# does the daemon continually scan the nix store?
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# does the builder use some content-addressed db to efficiently dedupe?
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nix.settings.auto-optimise-store = true;
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systemd.services.nix-daemon.serviceConfig = {
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# the nix-daemon manages nix builders
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# kill nix-daemon subprocesses when systemd-oomd detects an out-of-memory condition
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# see:
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# - nixos PR that enabled systemd-oomd: <https://github.com/NixOS/nixpkgs/pull/169613>
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# - systemd's docs on these properties: <https://www.freedesktop.org/software/systemd/man/systemd.resource-control.html#ManagedOOMSwap=auto%7Ckill>
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#
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# systemd's docs warn that without swap, systemd-oomd might not be able to react quick enough to save the system.
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# see `man oomd.conf` for further tunables that may help.
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#
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# alternatively, apply this more broadly with `systemd.oomd.enableSystemSlice = true` or `enableRootSlice`
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# TODO: also apply this to the guest user's slice (user-1100.slice)
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# TODO: also apply this to distccd
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ManagedOOMMemoryPressure = "kill";
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ManagedOOMSwap = "kill";
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};
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system.activationScripts.nixClosureDiff = {
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supportsDryActivation = true;
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text = ''
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# show which packages changed versions or are new/removed in this upgrade
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# source: <https://github.com/luishfonseca/dotfiles/blob/32c10e775d9ec7cc55e44592a060c1c9aadf113e/modules/upgrade-diff.nix>
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${pkgs.nvd}/bin/nvd --nix-bin-dir=${pkgs.nix}/bin diff /run/current-system "$systemConfig"
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'';
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};
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# disable non-required packages like nano, perl, rsync, strace
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environment.defaultPackages = [];
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# dconf docs: <https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/desktop_migration_and_administration_guide/profiles>
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# this lets programs temporarily write user-level dconf settings (aka gsettings).
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# they're written to ~/.config/dconf/user, unless `DCONF_PROFILE` is set to something other than the default of /etc/dconf/profile/user
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# find keys/values with `dconf dump /`
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programs.dconf.enable = true;
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programs.dconf.packages = [
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(pkgs.writeTextFile {
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name = "dconf-user-profile";
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destination = "/etc/dconf/profile/user";
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text = ''
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user-db:user
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system-db:site
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'';
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})
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];
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# sane.programs.glib.enableFor.user.colin = true; # for `gsettings`
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# link debug symbols into /run/current-system/sw/lib/debug
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# hopefully picked up by gdb automatically?
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environment.enableDebugInfo = true;
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}
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