Colourful Bash

logger.sh

#!/bin/bash

[ -z "${LOGGING_NO_COLORS}" ] && [ -t 1 ] && [ -n "$(tput colors)" ] || LOGGING_NO_COLORS="TRUE"
log() {
  local color=$1;shift
  local msg="$(date +%T.%3N) ${BASH_SOURCE[2]##*/}[${BASH_LINENO[1]}]: ${@}"
  local reset="\e[0m"
  if [ -n "${LOGGING_NO_COLORS}" ]; then
    color="";reset=""
  fi
  >&2 printf "${color}${msg}${reset}\n"
}

log_d() { log "\e[90m" "DEBUG - ${@}"; }
log_i() { log "\e[32m" "INFO  - ${@}"; }
log_w() { log "\e[33m" "WARN  - ${@}"; }
log_e() { log "\e[31m" "ERROR - ${@}"; }