Simple Bash function to manage output logging

bash-applog-example.sh

# Logging
OFF=0
FATAL=100
ERROR=200
WARN=300
INFO=400
DEBUG=500
TRACE=600
ALL=1000000

function log() {
  level="$1"

  # Skip if we don't want to see this kind of message
  if [ "${!level}" -gt "${!LOG_LEVEL}" ]; then
    return 0
  fi

  format="%s"
  print_arr=("$level")

  for i in "${@:2}"; do
    format="$format\t%s"
    print_arr+=("$i")
  done

  printf "$format\n" "${print_arr[@]}" 1>&2

  return 0
}