Log to file the current state of the battery to track trends

logpower.sh

#!/usr/bin/env bash
#
# A script I use to track the health of my FrameWork laptop battery
#
# Usage Ex.,
#
#   $ logpower closing lid
#
# will write to stdout and to a file:
# 1. Timestamp
# 2. Battery percentage
# 3. Battery state (discharging, charging)
# 4. time to full or empty
# 5. Any additional notes
#
#   2024-05-11T14:45:44-07:00 87%, discharging, time to empty: 12.2 hours, "closing lid"
#
set -euf -o pipefail

# Just append stdout to the file
#exec >>~/Documents/battery_status_notes.txt

# Write to stdout and append to the file
exec > >(tee -a ~/Documents/battery_status_notes.txt)

printf "%s%s, \"%s\"\n" \
  "$(date -Iseconds)" \
  "$(upower -i $(upower -e | grep 'BAT') | \
   grep -E "state|to\ full|to\ empty|percentage" | tr '\n' ',' | tr -s ' ' | \
   awk -F ',' 'BEGIN{OFS=FS}{print substr($3,13),substr($1,8),$2}')" \
  "$(echo -n "$@")"

# Alternatively, use logger to send it to /var/log/syslog with a $HOSTNAME $USER prefix.
#logger "$(upower -i $(upower -e | grep 'BAT') | \
#   grep -E "state|to\ full|to\ empty|percentage" | tr '\n' ',' | tr -s ' ' | \
#   awk -F ',' 'BEGIN{OFS=FS}{print substr($3,13),substr($1,8),$2,sep}')" \
#  "$(echo -n \""$@"\")"