Bernardo Magri
00f5311499
Adds a `nomarchy.system.power.*` surface (modules/nixos/power.nix), replacing the bare `services.upower` (Waybar reporting only) baseline: - power-profiles-daemon ships by default; switched through polkit (no root prompt). TLP is the opt-in `backend = "tlp"` for deeper battery tuning — the two are mutually exclusive (asserted). - thermald behind `power.thermal.enable` (Intel-only). - `power.batteryChargeLimit` (e.g. 80): a backend-independent sysfs oneshot writes charge_control_end_threshold; gated on `power.laptop`. Switcher + indicator live home-side and self-gate on a battery being present + powerprofilesctl running, so they hide on desktops and under TLP — no system->home wiring (like the Waybar battery widget): - rofi.nix: `nomarchy-menu power-profile` module + a picker entry shown only on laptops with PPD. - waybar.nix: first `custom/*` module — click cycles the profile. Installer writes `power.laptop = true` (battery probe) and `power.thermal.enable` (GenuineIntel) into the generated system.nix, and scaffolds the charge limit commented-out. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
61 lines
2.5 KiB
Nix
61 lines
2.5 KiB
Nix
# Active power management. One concern, one file: this is the system
|
|
# side — the power daemon (power-profiles-daemon by default, or TLP),
|
|
# thermald, and the battery charge limit. The profile *switcher* and the
|
|
# Waybar *indicator* live home-side (rofi.nix / waybar.nix); they self-
|
|
# gate on powerprofilesctl being present, so there's no system→home wiring
|
|
# to keep in sync (the same way the Waybar battery widget auto-hides on
|
|
# desktops). See the roadmap in README.md.
|
|
{ config, lib, ... }:
|
|
|
|
let
|
|
cfg = config.nomarchy.system.power;
|
|
ppd = cfg.backend == "ppd";
|
|
tlp = cfg.backend == "tlp";
|
|
chargeLimit = cfg.laptop && cfg.batteryChargeLimit != null;
|
|
in
|
|
{
|
|
config = lib.mkIf cfg.enable {
|
|
# PPD and TLP both drive CPU/platform power — running both fights.
|
|
# `backend` selects exactly one; this assertion only fires if a
|
|
# downstream force-enables the other service directly.
|
|
assertions = [{
|
|
assertion = !(config.services.power-profiles-daemon.enable
|
|
&& config.services.tlp.enable);
|
|
message = ''
|
|
nomarchy: power-profiles-daemon and TLP are mutually exclusive.
|
|
Pick one with nomarchy.system.power.backend ("ppd" or "tlp").
|
|
'';
|
|
}];
|
|
|
|
# Unprivileged profile switching (the menu/Waybar) goes through
|
|
# polkit, already enabled distro-wide in default.nix.
|
|
services.power-profiles-daemon.enable = lib.mkDefault ppd;
|
|
services.tlp.enable = lib.mkDefault tlp;
|
|
|
|
# thermald is Intel-only, so off unless asked (the installer enables
|
|
# it on a GenuineIntel CPU). Sits happily next to either backend.
|
|
services.thermald.enable = lib.mkDefault cfg.thermal.enable;
|
|
|
|
# Battery charge limit via sysfs. PPD can't cap charge at all, and
|
|
# TLP's own knob only applies under TLP — so a tiny oneshot writes
|
|
# the threshold directly, independent of the backend. Boot-time only:
|
|
# some firmwares reset the threshold on unplug; revisit with a udev
|
|
# hook if that bites. `-` paths that don't exist are skipped, so this
|
|
# is a clean no-op on hardware without the control.
|
|
systemd.services.nomarchy-battery-charge-limit = lib.mkIf chargeLimit {
|
|
description = "Cap battery charging at ${toString cfg.batteryChargeLimit}%";
|
|
wantedBy = [ "multi-user.target" ];
|
|
serviceConfig = {
|
|
Type = "oneshot";
|
|
RemainAfterExit = true;
|
|
};
|
|
script = ''
|
|
for thresh in /sys/class/power_supply/BAT*/charge_control_end_threshold; do
|
|
[ -w "$thresh" ] && echo ${toString cfg.batteryChargeLimit} > "$thresh"
|
|
done
|
|
exit 0
|
|
'';
|
|
};
|
|
};
|
|
}
|