2021-01-12 21:54:58 +08:00

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#!/bin/sh
# Program:
# * rename file while removing [:punct:], replace [:upper:] with
# [:lower:], replace "${sep}" with '_'
# * while given '-d' , do not rename file, only print new
# file name
# Dependency:
# * err.sh
# Author:
# * Chang, Chu-Kuan <cckuan@changchukuan.name>
#
# Setting
#
# Characters which will be replaced by '_', other [:punct:] not presented here
# will be deleted
readonly sep='[]()._-[:blank:]'
. err.sh
help_msg()
{
cat << EOF
Usage:
${progname} [-hd] file... - format filename
Options:
-d Perform a 'dry run'. Do not actually rename file.
-h Show this message and exit.
EOF
}
process_file()
{
file="$1"
dir="$(dirname "${file}")"
base="$(basename "${file}")"
# Return if there is error parsing file name
if test -z "${file}" || test -z "${dir}" || test -z "${base}"; then
printf '%s: error parsing file: %s\n' "${progname}" "${file}" 1>&2
return 1
fi
case "${base}" in
# file name with extension
*.*)
# get file extension
extension="${base##*.}"
# process file name
new_base="$(printf '%s' "${base%.*}" \
| iconv --to-code=utf-8 \
| tr "${sep}" ' ' \
| tr -d '[:punct:]' \
| tr '[:upper:]' '[:lower:]' \
| tr -s ' ' '_' \
| sed 's/^_//; s/_$//'
).${extension}"
;;
# file name without extension
*)
new_base="$(printf '%s' "${base}" \
| iconv --to-code=utf-8 \
| tr "${sep}" ' ' \
| tr -d '[:punct:]' \
| tr '[:upper:]' '[:lower:]' \
| tr -s ' ' '_' \
| sed 's/^_//; s/_$//'
)"
;;
esac
if test "${base}" = "${new_base}"; then
clean_file_cnt="$((clean_file_cnt + 1))"
printf '%s: file %s require no rename\n' "${progname}" \
"${base}"
return 0
fi
case "${d_flag}" in
'1')
# While given '-d', do not rename file, only
# print new file name
printf '%s -> %s\n' "${base}" "${new_base}"
;;
*)
# Rename file (prompt before overwrite)
mv -iv "${dir}/${base}" "${dir}/${new_base}" \
&& success_file_cnt="$((success_file_cnt + 1))"
;;
esac
}
readonly progname="$(basename "$0")"
d_flag='0'
total_file_cnt='0'
success_file_cnt='0'
clean_file_cnt='0'
while getopts 'dh' opt; do
case "${opt}" in
'd')
readonly d_flag='1'
;;
'h')
help_msg
exit 0
;;
*)
err '1' 'invalid option\n'
;;
esac
done
shift "$((OPTIND - 1))"
for arg; do
total_file_cnt="$((total_file_cnt + 1))"
process_file "${arg}"
done
# Report status
printf '\n%s: renamed %d, clean %d, total %d/%d\n' "${progname}" \
"${success_file_cnt}" "${clean_file_cnt}" \
"$((success_file_cnt + clean_file_cnt))" "${total_file_cnt}"