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The bar colored the battery at 25/10% but nothing notified. New shellcheck-gated watcher (pkgs/nomarchy-battery-notify, overlay) polls the same sysfs the bar reads — type=Battery, scope!=Device — and fires one toast per downward crossing (normal at 25%, critical at 10%; swaync keeps critical up until dismissed), re-armed by charging. Self-gates on battery presence (the powerprofile pattern), so desktops get a silent no-op. HM user unit behind nomarchy.batteryNotify.enable (default on) with libnotify on the unit PATH; notify-send resolves from PATH so the VM check can shim it. poweralertd rejected: its UPower thresholds (20/5) wouldn't match the bar, and it toasts every plug/unplug. Verified: V0 (flake check, bash -n); V1 (template-home builds, unit in the generation); V2 GREEN (new checks.battery-notify, test_power fake battery: self-gate, silence at 80%, one toast per crossing, critical urgency, charging re-arms). Remains: V3 — real swaync toast on a draining laptop (HARDWARE-QUEUE). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
59 lines
2.1 KiB
Bash
59 lines
2.1 KiB
Bash
# Low-battery notifications — the session-side complement to the bar's
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# battery colors: Waybar paints the module @warn at 25% and @bad at 10%
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# (waybar.nix battery.states) but nothing *notified*. This watcher polls
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# the same sysfs state the bar reads and fires exactly one notification
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# per downward crossing — normal at 25%, critical at 10% (swaync keeps
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# critical toasts up until dismissed) — re-arming once the charger lands.
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#
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# notify-send is resolved from PATH on purpose (not a runtimeInput): the
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# unit (battery-notify.nix) provides libnotify; the VM check shims it to
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# capture the calls.
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#
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# usage: nomarchy-battery-notify [poll-interval-seconds]
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interval="${1:-30}"
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warn=25
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crit=10
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# System batteries only: type Battery, and not scope=Device (how
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# peripheral batteries — mice, headsets — report). Name-agnostic on
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# purpose: BAT0, dual-battery BAT0+BAT1, CMB0, test_battery all match.
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batteries() {
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local d
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for d in /sys/class/power_supply/*/; do
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[ "$(cat "$d/type" 2>/dev/null)" = Battery ] || continue
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[ "$(cat "$d/scope" 2>/dev/null || echo System)" = Device ] && continue
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printf '%s\n' "$d"
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done
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}
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# Self-gate: no battery, not a laptop — a clean no-op on desktops.
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[ -n "$(batteries)" ] || exit 0
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state=ok # ok → warn → crit, one notification per downward crossing
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while :; do
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sum=0 n=0 discharging=
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while IFS= read -r d; do
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cap=$(cat "$d/capacity" 2>/dev/null) || continue
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sum=$((sum + cap)); n=$((n + 1))
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[ "$(cat "$d/status" 2>/dev/null)" = Discharging ] && discharging=1
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done < <(batteries)
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if [ "$n" -gt 0 ] && [ -n "$discharging" ]; then
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cap=$((sum / n))
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if [ "$cap" -le "$crit" ] && [ "$state" != crit ]; then
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notify-send -u critical -a Nomarchy "Battery critical: ${cap}%" \
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"Plug in now."
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state=crit
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elif [ "$cap" -le "$warn" ] && [ "$state" = ok ]; then
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notify-send -u normal -a Nomarchy "Battery low: ${cap}%" \
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"Consider plugging in."
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state=warn
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fi
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else
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# On the charger (or nothing readable): re-arm for the next drain.
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state=ok
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fi
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sleep "$interval"
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done
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