Resolve bash script location

example.sh

# original source of this is quarto
# Determine the path to this script (we'll use this to figure out relative positions of other files)
SOURCE="${BASH_SOURCE[0]}"
while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
  SCRIPT_PATH="$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )"
  SOURCE="$(readlink "$SOURCE")"
  [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
done
export SCRIPT_PATH="$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )"