Colored logging in bash

log.sh

#!/bin/bash
# Exit on error
set -e

# Logging utility
log() {
    # Escape codes for colored output
    C_GREEN="\033[32m"
    C_NORMAL="\033[0m"
    C_RED="\033[31m"
    C_YELLOW="\033[33m"

    level=$1

    # set the exit flag if logging error
    if [ "$level" = "error" ]; then
        should_exit=true
        err_flag="1>&2"
    else
    	should_exit=false
    fi 

    if [ "$DOTS_QUIET" = "true" ] && [ "$level" != "error" ]; then
        return 0
    fi

    case $level in
	    debug)
	        color=$C_NORMAL
	        ;;
        error)
	        color=$C_RED
	        ;;
	    info)
	        color=$C_GREEN
	        ;;
	    warn)
	        color=$C_YELLOW
	        ;;
    esac

    # On to the next argument
    shift

    # Output
    echo -e "${color}[$(date +'%Y-%m-%d %H:%M:%S')] $(echo "$level" | tr '[:lower:]' '[:upper:]'):\t${*}$C_NORMAL" "$err_flag"
    if [ "$should_exit" == "true" ]; then
        exit 1
    fi

    return 0
}