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rename.sh
executable file
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rename.sh
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#!/bin/bash
#
# rename.sh: A Bash implementation of Perl rename
#
# Copyright (C) 2016 Panagiotis Theocharis <[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 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/>.
display_usage() {
echo -e "Usage: $(basename $0) [-n] 's/../../' <FILES>"
}
# Check whether user had supplied -h or --help . If yes display usage
if [[ ( $1 == "--help") || $1 == "-h" ]]; then
display_usage
exit 0
fi
# Check for OPTIONS
if [[ $1 == -[a-z] ]]
then
if [[ $1 == "-n" ]]; then
COMMAND=$1
shift
else
>&2 echo "ERROR: Unrecognised option '$1'"
display_usage
exit 1
fi
fi
# Check for sed regular expression
if [[ "$1" == s/*/*/ ]]; then
PATTERN=$1
shift
else
>&2 echo "ERROR: Unsupported regular expression '$1'"
display_usage
exit 2
fi
# Check for <FILES>
if (( $# == 0 )); then
>&2 echo "ERROR: No files provided for renaming"
display_usage
exit 3
fi
while [[ -n "$1" ]]; do
f=$1
shift
a="$(echo "$f" | sed "$PATTERN")"
if [[ "$f" != "$a" ]]; then
echo "$f" ">" "$a"
if [[ "$COMMAND" != "-n" ]]; then
mv "$f" "$a"
fi
fi
done