gnu bash script template

If you want to do a nice script in gnu way you may think useful:

#
# A sample program illustrating shell option parsing.
#
# Copyright (C) 2007 by Bob Proulx <[EMAIL PROTECTED]>.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

version=0.0

progname=$(basename $0)

print_help()
{
cat <<'EOF'
Usage: exampleprog [options] SOURCE...
or: exampleprog [options] DIRECTORY

Do something with something. Write your man page description here.

Options:
--help print this help message
--version print program version
-a, --alpha do alpa
-b, --bravo=STRING do bravo
-d, --debug debug program
-q, --quiet quiet output
-v, --verbose verbose output

Examples:

The most common use is to run it like this.

$ exampleprog

But sometimes like this.

$ exampleprog -q -a --bravo=foo

Report bugs to .
EOF
}

print_version()
{
cat <.
There is NO WARRANTY, to the extent permitted by law.

Written by Bob Proulx.
EOF
}

SHORTOPTS="ab:dqv"
LONGOPTS="help,version,alpha,bravo:,debug,quiet,verbose"

if $(getopt -T >/dev/null 2>&1) ; [ $? = 4 ] ; then # New longopts getopt.
OPTS=$(getopt -o $SHORTOPTS --long $LONGOPTS -n "$progname" -- "$@")
else # Old classic getopt.
# Special handling for --help and --version on old getopt.
case $1 in --help) print_help ; exit 0 ;; esac
case $1 in --version) print_version ; exit 0 ;; esac
OPTS=$(getopt $SHORTOPTS "$@")
fi

if [ $? -ne 0 ]; then
echo "'$progname --help' for more information" 1>&2
exit 1
fi

eval set -- "$OPTS"

alpha=false
bravo=""
debug=false
quiet=false
verbose=false
while [ $# -gt 0 ]; do
: debug: $1
case $1 in
--help)
print_help
exit 0
;;
--version)
print_version
exit 0
;;
-a|--alpha)
alpha=true
shift
;;
-b|--bravo)
bravo=$2
shift 2
;;
-d|--debug)
debug=true
shift
;;
-q|--quiet)
quiet=true
shift
;;
-v|--verbose)
verbose=true
shift
;;
--)
shift
break
;;
*)
echo "Internal Error: option processing error: $1" 1>&2
exit 1
;;
esac
done

if $verbose; then
echo "Verbose output here."
fi

if ! $quiet; then
echo Say stuff here.
fi

$debug && echo No bugs found here.

exit 0
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