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feat(nightlight): persistent off via state marker

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A manual `off` now drops ~/.local/state/nomarchy/nightlight-off and the
hyprsunset unit refuses to (re)start while it exists
(Unit.ConditionPathExists=!%h/...), so the off survives logout/reboot
until toggled back on. `on`/toggle-on remove the marker before starting
(a failed condition would otherwise no-op the start). Without the marker
behaviour is unchanged: the service stays WantedBy=graphical-session.target
and resumes its schedule at login, so persistence is opt-in via the toggle.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Bernardo Magri
2026-06-20 20:09:22 +01:00
parent d1344712b8
commit 5747dc9839
2 changed files with 29 additions and 14 deletions
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23
modules/home/nightlight.nix
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@@ -21,6 +21,12 @@ let
# module hides itself — same pattern as the power-profile indicator.
nomarchy-nightlight = pkgs.writeShellScriptBin "nomarchy-nightlight" ''
unit=hyprsunset.service
# Persistent-off marker — mirrors the unit's ConditionPathExists below.
# Present => night-light stays off across logout/reboot until toggled on.
# Path is literal (not XDG_STATE_HOME) so it matches the unit's %h check.
marker="$HOME/.local/state/nomarchy/nightlight-off"
mark_off() { mkdir -p "$(dirname "$marker")"; : > "$marker"; }
mark_on() { rm -f "$marker"; }
if ! systemctl --user cat "$unit" >/dev/null 2>&1; then
[ "''${1:-}" = status ] && exit 0
notify-send "Night light" "Not enabled — set nomarchy.nightlight.enable."
@@ -33,14 +39,14 @@ let
else
printf '{"text":"󰖙","tooltip":"Night light off (click to enable)","class":"off"}\n'
fi ;;
on) systemctl --user start "$unit" ;;
off) systemctl --user stop "$unit" ;;
on) mark_on; systemctl --user start "$unit" ;;
off) mark_off; systemctl --user stop "$unit" ;;
toggle)
if systemctl --user is-active --quiet "$unit"; then
systemctl --user stop "$unit"
notify-send "Night light off" "Screen back to true colours."
mark_off; systemctl --user stop "$unit"
notify-send "Night light off" "Screen back to true colours (stays off until re-enabled)."
else
systemctl --user start "$unit"
mark_on; systemctl --user start "$unit"
notify-send "Night light on" "Warm filter follows your schedule."
fi ;;
*) echo "usage: nomarchy-nightlight [toggle|status|on|off]" >&2; exit 64 ;;
@@ -59,6 +65,13 @@ in
];
};
# Persistent off: a manual `off` drops ~/.local/state/nomarchy/nightlight-off,
# and this Condition makes the unit refuse to (re)start while it exists — so
# an off survives logout/reboot. `nomarchy-nightlight on` removes it first
# (a failed condition would otherwise no-op the start). %h = $HOME.
systemd.user.services.hyprsunset.Unit.ConditionPathExists =
lib.mkIf cfg.enable "!%h/.local/state/nomarchy/nightlight-off";
# Always on PATH (it self-gates at runtime), so a static whole-swap Waybar
# can exec it even when night-light is off without the call failing.
home.packages = [ nomarchy-nightlight ];