Modular approach to bash logging

logger.sh

#!/bin/bash

# From here https://www.cubicrace.com/2016/03/efficient-logging-mechnism-in-shell.html
# Modular approach to bash logging
#

SCRIPT_LOG=/var/log/cloud-config.log
touch $SCRIPT_LOG

function SCRIPTENTRY() {
  timeAndDate=$(date)
  script_name=$(basename "$0")
  script_name="${script_name%.*}"
  echo "[$timeAndDate] [DEBUG]  > $script_name $FUNCNAME" >>$SCRIPT_LOG
}

function SCRIPTEXIT() {
  script_name=$(basename "$0")
  script_name="${script_name%.*}"
  echo "[$timeAndDate] [DEBUG]  < $script_name $FUNCNAME" >>$SCRIPT_LOG
}

function ENTRY() {
  local cfn="${FUNCNAME[1]}"
  timeAndDate=$(date)
  echo "[$timeAndDate] [DEBUG]  > $cfn $FUNCNAME" >>$SCRIPT_LOG
}

function EXIT() {
  local cfn="${FUNCNAME[1]}"
  timeAndDate=$(date)
  echo "[$timeAndDate] [DEBUG]  < $cfn $FUNCNAME" >>$SCRIPT_LOG
}

function INFO() {
  local function_name="${FUNCNAME[1]}"
  local msg="$1"
  timeAndDate=$(date)
  echo "[$timeAndDate] [INFO]  $msg" >>$SCRIPT_LOG
}

function DEBUG() {
  local function_name="${FUNCNAME[1]}"
  local msg="$1"
  timeAndDate=$(date)
  echo "[$timeAndDate] [DEBUG]  $msg" >>$SCRIPT_LOG
}

function ERROR() {
  local function_name="${FUNCNAME[1]}"
  local msg="$1"
  timeAndDate=$(date)
  echo "[$timeAndDate] [ERROR]  $msg" >>$SCRIPT_LOG
}