Simple logger for bash scripts

log.sh

#!/bin/bash

## SETUP (DO NOT EDIT) ##
logfile_name=${logfile_prefix}$(date +$logfile_date_format)"."${logfile_ext}
logfile_working_path=${logfile_location}"/"${logfile_name}
## -- ##


## FUNCTIONS ##
# log(contents) -> void
log(){
	#Check if the logfile directory exists and create it if it doesn't
	if [ ! -d "$logfile_location" ]; then
		mkdir -p $logfile_location
		
		#Announce to the console if allowed to
		if [ $logger_debug -eq 1 ]; then echo "Logger directory ("${logfile_location}") is nonexistant. Creating it..."; fi
	fi
	
	#Check if the logfile exists
	if [ ! -f "$logfile_working_path" ]; then
		#Create the logfile via touch
		touch $logfile_working_path
		
		#Announce to the console if allowed to
		if [ $logger_debug -eq 1 ]; then echo "Creating nonexistant logfile located at \""${logfile_working_path}"\"..."; fi
	fi
	
	#Generate the prefix if desired
	local prefix=""
	if [ $logger_include_time -eq 1 ]; then
		prefix="["$(date +%T)"] "
	fi
	
	#Construct the final message
	local message=${prefix}${@}
	
	#Log the message to the file and the console (if desired)
	echo ${message} >> ${logfile_working_path}
	if [ $logger_quiet -eq 0 ]; then echo ${message}; fi
}
## -- ##

test.sh

#!/bin/bash

## CONFIG FOR LOGGER ##
#Sets the location to store the logfiles. Relative to the current directory
logfile_location="logs/"
#Sets the logfile extension
logfile_ext="log"
#Sets the prefix for the logfiles
logfile_prefix="log_"
#Sets the date format for the logfiles, excluding the mandatory '+'. See https://www.tutorialkart.com/bash-shell-scripting/bash-date-format-options-examples/
logfile_date_format="%Y-%d-%m_%H-%M-%S"
#Sets whether to suppress console output (0: no, 1: yes)
logger_quiet=0
#Sets whether to allow console debug (0: no, 1: yes)
logger_debug=1
#Sets whether the time should be prefixed (ie: `[10:00:00] message`); (0: no, 1: yes)
logger_include_time=1
## -- ##

#Include log.sh
. ./log.sh --source-only

# Testing via fibonacci seq
n=$((0))
i=$((0))
j=$((1))
while [ $(($n < 90)) == 1 ]; do
	k=$(($i + $j))
	i="$j"
	j="$k"
	n=$(($n + 1))
	log $k
done