rock_no-stdin_example.sh

#!/bin/bash
# Usage: rock [options] <argv>...
#
# Options:
#       --verbose  Generate verbose messages.
#       --help     Show help options.
#       --version  Print program version.

version="rock 0.1.0
Copyright (C) 200X Thomas Light
License RIT (Robot Institute of Technology)
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law."

# no need to change PATH if docopts.sh an docopts are in your PATH
PATH=..:$PATH
source docopts.sh
help=$(docopt_get_help_string "$0")

parsed=$(docopts -V "$version" -h "$help" : "$@")
echo "$parsed"
eval "$parsed"

echo "verbose=$verbose"

if $verbose ; then
    echo "Hello, world!"
else
    :
    # I'm silent
fi