dotfiles @ 5f71ccc

A bin/power-monitor.sh

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                +#!/usr/bin/env bash

              
                
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                +# ~~stolen~~ inspired by https://github.com/linuxmobile/kaku/blob/niri/home/services/system/power-monitor.nix

              
                
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                +

              
                
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                +set -euo pipefail

              
                
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                +

              
                
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                +STARTUP_WAIT=0

              
                
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                +

              
                
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                +log() {

              
                
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                +  echo "[$(date '+%Y-%m-%d %H:%M:%S')] $*" >&2

              
                
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                +}

              
                
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                +

              
                
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                +get_battery_path() {

              
                
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                +  local bat_path

              
                
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                +  bat_path=$(echo /sys/class/power_supply/BAT*)

              
                
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                +  if [[ ! -d "$bat_path" ]]; then

              
                
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                +    log "No battery found"

              
                
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                +    exit 1

              
                
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                +  fi

              
                
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                +  echo "$bat_path"

              
                
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                +}

              
                
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                +

              
                
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                +readonly BAT="$(get_battery_path)"

              
                
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                +readonly BAT_STATUS="$BAT/status"

              
                
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                +readonly BAT_CAP="$BAT/capacity"

              
                
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                +readonly LOW_BAT_PERCENT=30

              
                
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                +

              
                
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                +readonly AC_PROFILE="performance"

              
                
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                +readonly BAT_PROFILE="balanced"

              
                
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                +readonly LOW_BAT_PROFILE="power-saver"

              
                
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                +

              
                
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                +for file in "$BAT_STATUS" "$BAT_CAP"; do

              
                
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                +  if [[ ! -f "$file" ]]; then

              
                
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                +    log "Required file not found: $file"

              
                
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                +    exit 1

              
                
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                +  fi

              
                
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                +done

              
                
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                +

              
                
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                +if ! command -v powerprofilesctl >/dev/null 2>&1; then

              
                
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                +  log "powerprofilesctl not found"

              
                
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                +  exit 1

              
                
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                +fi

              
                
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                +

              
                
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                +if [[ -n "''${STARTUP_WAIT:-}" ]]; then

              
                
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                +  sleep "$STARTUP_WAIT"

              
                
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                +fi

              
                
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                +

              
                
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                +get_power_profile() {

              
                
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                +  local status capacity

              
                
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                +  status=$(cat "$BAT_STATUS")

              
                
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                +  capacity=$(cat "$BAT_CAP")

              
                
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                +

              
                
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                +  if [[ "$status" == "Discharging" ]]; then

              
                
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                +    if [[ "$capacity" -gt $LOW_BAT_PERCENT ]]; then

              
                
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                +      echo "$BAT_PROFILE"

              
                
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                +    else

              
                
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                +      echo "$LOW_BAT_PROFILE"

              
                
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                +    fi

              
                
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                +  else

              
                
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                +    echo "$AC_PROFILE"

              
                
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                +  fi

              
                
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                +}

              
                
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                +

              
                
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                +apply_profile() {

              
                
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                +  local profile=$1

              
                
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                +  log "Setting power profile to $profile"

              
                
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                +  if ! powerprofilesctl set "$profile"; then

              
                
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                +    log "Failed to set power profile"

              
                
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                +    return 1

              
                
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                +  fi

              
                
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                +}

              
                
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                +

              
                
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                +log "Starting power monitor"

              
                
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                +prev_profile=""

              
                
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                +

              
                
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                +while true; do

              
                
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                +  current_profile=$(get_power_profile)

              
                
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                +

              
                
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                +  if [[ "$prev_profile" != "$current_profile" ]]; then

              
                
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                +    apply_profile "$current_profile"

              
                
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                +    prev_profile=$current_profile

              
                
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                +  fi

              
                
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                +

              
                
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                +  if ! inotifywait -qq "$BAT_STATUS" "$BAT_CAP"; then

              
                
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                +    log "inotifywait failed, sleeping for 5 seconds before retry"

              
                
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                +    sleep 5

              
                
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                +  fi

              
                
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                +done

              

A config/systemd/user/power-monitor.service

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                +[Unit]

              
                
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                +Description = Power Monitor

              
                
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                +After = power-profiles-daemon.service

              
                
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                +Wants = power-profiles-daemon.service

              
                
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                +

              
                
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                +[Service]

              
                
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                +Type = simple

              
                
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                +ExecStart = /home/olex/bin/power-monitor.sh

              
                
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                +Restart = on-failure

              
                
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                +RestartSec = 5s

              
                
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                +

              
                
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                +[Install]

              
                
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                +WantedBy=default.target