jamflog.function

# jamflog - Copyright (c) 2021 Joel Bruner, Licensed under the MIT License
# a way to log to stdout and /var/log/jamf.log (or elsewhere) and have it match Jamf's log style

function jamflog(){
	[ -n "${-//[^x]/}" ] && { local xTrace=1; set +x; } &>/dev/null
	local logFile="${2:-/var/log/jamf.log}"
	#if it exists but we cannot write to the log or it does not exist, unset and tee simply echoes
	[ -e "${logFile}" -a ! -w "${logFile}" ] && unset logFile
	#this will tee to jamf.log in the jamf log format: <Day> <Month> DD HH:MM:SS <Computer Name> ProcessName[PID]: <Message>
	builtin echo "$(/bin/date +'%a %b %d %H:%M:%S') ${jamflog_myComputerName:="$(/usr/sbin/scutil --get ComputerName)"} ${jamflog_myName:="$(/usr/bin/basename "${0%.*}")"}[${myPID:=$$}]: ${1}" | /usr/bin/tee -a "${logFile}" 2>/dev/null
	[ "${xTrace:-0}" = 1 ] && { set -x; } &>/dev/null
}