Template for shell script with logging

shell_template.sh

set -o pipefail
set -o errtrace
set -o nounset
set -o errexit

exec 1> >(while IFS= read -r line; do echo "$(date) [DEBUG] $line"; done >>/tmp/test)
exec 2> >(while IFS= read -r line; do echo "$(date) [ERROR] $line"; done >>/tmp/test)
date

function finish {
  echo TRAP
  exec &>/dev/tty
  echo "[ERROR]: code: $1, line: $2, func: $3"
}


function fail_func() {
  ls -la weqwewqewq
}

trap 'finish $? $LINENO ${FUNCNAME:-main}' ERR

echo start script
sleep 2
date
#ls -la cxzczxczc
fail_func
echo end script