unixorn/tumult.plugin.zsh

#!/usr/bin/env bash
#
# Show the wattage of your charger
#
# Copyright 2021, Joe Block <jpb@unixorn.net>

set -o pipefail
if [[ -n "$DEBUG" ]]; then
  set -x
fi

function debug() {
  if [[ -n "$DEBUG" ]]; then
    echo "$@"
  fi
}

function fail() {
  printf '%s\n' "$1" >&2  ## Send message to stderr. Exclude >&2 if you don't want it that way.
  exit "${2-1}"  ## Return a code specified by $2 or 1 by default.
}

function has() {
  # Check if a command is in $PATH
  which "$@" > /dev/null 2>&1
}

function charger-wattage() {
  pmset -g ac | awk '/Wattage/ {print $3}'
}

if [[ "$(uname -s)" != 'Darwin' ]]; then
  echo 'Sorry, this script only works on macOS'
  exit 1
fi

if has pmset; then
  charger-wattage
else
  # shellcheck disable=SC2016
  fail 'Cannot find pmset in your $PATH'
fi