clevis/src/clevis

#!/bin/bash -e
# vim: set tabstop=8 shiftwidth=4 softtabstop=4 expandtab smarttab colorcolumn=80:
#
# Copyright (c) 2017 Red Hat, Inc.
# Author: Nathaniel McCallum <npmccallum@redhat.com>
#
# 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
#

function findexe() {
    while read -d: path; do
        [ -f "$path/$1" -a -x "$path/$1" ] && echo "$path/$1" && return 0
    done <<< "$PATH:"
    return 1
}

cmd=clevis
while [ $# -gt 0 ]; do
    [[ "$1" =~ ^- ]] && break
    cmd="$cmd-$1"
    shift

    exe=`findexe "$cmd"` && exec "$exe" "$@"
done

echo >&2
echo "Usage: clevis COMMAND [OPTIONS]" >&2
echo >&2

max=0
for f in $0-*; do
    [ -f "$f" -a -x "$f" ] || continue
    f=${f##*/}
    [ ${#f} -gt $max ] && max=${#f}
done

for f in $0-*; do
    [ -f "$f" -a -x "$f" ] || continue
    summ=`$f --summary 2>/dev/null` || continue
    f=${f##*/}
    printf "  %-*s %s\n" "$max" "${f//-/ }" "$summ" >&2
done

echo >&2