Simple bash logging to a file

bash_logging.sh

#!/usr/bin/env bash

readonly LOG_FILE="/tmp/$(basename "$0").log"
log_i() { echo "[INFO]    $*" | tee -a "$LOG_FILE" >&2; }
log_w() { echo "[WARNING] $*" | tee -a "$LOG_FILE" >&2; }
log_e() { echo "[ERROR]   $*" | tee -a "$LOG_FILE" >&2; }
log_f() { echo "[FATAL]   $*" | tee -a "$LOG_FILE" >&2; return 1; }