Show help

Tag(s):

 # Usage info
  show_help() {
  cat << EOF
  Usage: ${0##*/} [-hv] [-f OUTFILE] [FILE]...
  Do stuff with FILE and write the result to standard output. With no FILE
  or when FILE is -, read standard input.
 
      -h          display this help and exit
      -f OUTFILE  write the result to OUTFILE instead of standard output.
      -v          verbose mode. Can be used multiple times for increased
                  verbosity.
  EOF
  }