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strip out a bunch of unused nixpkgs defaults

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Colin 2024-02-19 06:20:06 +00:00
parent 05daf738fc
commit 5666a05ef0
2 changed files with 38 additions and 0 deletions
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1
hosts/common/default.nix
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@ -11,6 +11,7 @@
./net
./nix-path
./persist.nix
./polyunfill.nix
./programs
./secrets.nix
./ssh.nix

37
hosts/common/polyunfill.nix Normal file
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@ -0,0 +1,37 @@
# strictly *decrease* the scope of the default nixos installation/config
{ lib, ... }:
{
# remove all the non-existent default directories from XDG_DATA_DIRS, XDG_CONFIG_DIRS to simplify debugging.
# this is defaulted in <repo:nixos/nixpkgs:nixos/modules/programs/environment.nix>,
# without being gated by any higher config.
environment.profiles = lib.mkForce [
"/etc/profiles/per-user/$USER"
"/run/current-system/sw"
];
# NIXPKGS_CONFIG defaults to "/etc/nix/nixpkgs-config.nix", for idfk why.
# that's never existed on my system and everything does fine without it set empty (no nixpkgs API to forcibly *unset* it).
environment.variables.NIXPKGS_CONFIG = lib.mkForce "";
# XDG_CONFIG_DIRS defaults to "/etc/xdg", which doesn't exist.
# in practice, pam appends the values i want to XDG_CONFIG_DIRS, though this approach causes an extra leading `:`
environment.sessionVariables.XDG_CONFIG_DIRS = lib.mkForce [];
# XCURSOR_PATH: defaults to `[ "$HOME/.icons" "$HOME/.local/share/icons" ]`, neither of which i use, just adding noise.
# see: <repo:nixos/nixpkgs:nixos/modules/config/xdg/icons.nix>
environment.sessionVariables.XCURSOR_PATH = lib.mkForce [];
# xdg.autostart.enable defaults to true, and links /etc/xdg/autostart into the environment, populated with .desktop files.
# see: <repo:nixos/nixpkgs:nixos/modules/config/xdg/autostart.nix>
# .desktop files are a questionable way to autostart things: i generally prefer a service manager for that.
xdg.autostart.enable = false;
# nix.channel.enable: populates `/nix/var/nix/profiles/per-user/root/channels`, `/root/.nix-channels`, `$HOME/.nix-defexpr/channels`
# <repo:nixos/nixpkgs:nixos/modules/config/nix-channel.nix>
# TODO: may want to recreate NIX_PATH, nix.settings.nix-path
nix.channel.enable = false;
# environment.stub-ld: populate /lib/ld-linux.so with an object that unconditionally errors on launch,
# so as to inform when trying to run a non-nixos binary?
# IMO that's confusing: i thought /lib/ld-linux.so was some file actually required by nix.
environment.stub-ld.enable = false;
}