initial commit

mp3_name_shuffle.sh

@@ -0,0 +1,109 @@
+#!/bin/bash
+# Author:		smirky@smirky.net
+# Created on:		09.06.2017
+# Last modifier:	smirky@smirky.net
+# Last modified:	23.03.2018
+
+# Some 'sane' defaults
+unset verbose
+unset restore
+unset music_dir
+old_state_file=''
+version="20180323"
+
+print_version() {
+	printf "Version: %s\\n" "${version}"
+}
+
+print_usage() {
+	printf "Usage: %s -d DIRECTORY [-r STATE_FILE] [-V]\\n" "${0}"
+}
+
+print_help() {
+	print_usage
+	printf "Rename all mp3 files in a directory with ability to restore.
+
+	-d, --directory DIRECTORY	specify the work path
+	-r, --restore STATE_FILE	restore a previous state of file names
+	-V, --verbose			output verbose details while running
+	-h, --help			display this help and exit
+	-v, --version			output version information and exit\\n"
+}
+
+vprintf() {
+	if [ "${verbose}" ]; then
+		printf "%s\\n" "$@"
+	fi
+}
+
+OPTS=$(getopt -o d:r:Vhv --long directory:,restore:,verbose,help,version -n 'parse-options' -- "$@")
+
+while true; do
+	case "$1" in
+		-v | --version ) print_version && exit;;
+		-h | --help ) print_help && exit;;
+		-V | --verbose ) verbose=true; shift;;
+		-r | --restore ) restore=true && old_state_file="$2"; shift 2;;
+		-d | --directory ) music_dir="$2"; shift 2;;
+		-- ) shift; break;;
+		* ) print_usage; exit;;
+	esac
+	if [ "$1" == "" ]; then
+		break
+	fi
+done
+if [ -z "${music_dir}" ]; then
+	print_usage
+	exit 1
+fi
+
+if [ ! -d "${music_dir}" ]; then
+	printf "%s doesn't exist!\\n" "${music_dir}"
+	exit 1
+fi
+
+if [ ! -w "${music_dir}" ]; then
+	printf "No permissions to write in %s !\\n" "${music_dir}"
+	exit 1
+fi
+
+state_dir="${music_dir}/_STATES_"
+if [ ! -d "${state_dir}" ]; then
+	vprintf "Creating: ${state_dir}"
+	mkdir "${state_dir}"
+fi
+
+new_state_file="${state_dir}/$(date +'%Y.%m.%d_%H:%M:%S')"
+vprintf "Generating state file: ${new_state_file}"
+touch "${new_state_file}"
+
+if [ $restore ]; then
+	if [ ! -f "${old_state_file}" ]; then
+		printf "No such STATE_FILE: %s !\\n" "${old_state_file}"
+		rm "${new_state_file}"
+		exit 1
+	fi
+	IFS=$'\t'
+	while read -r old current
+	do
+		vprintf "mv \"${music_dir}/${current}\" \"${music_dir}/${old}\""
+		mv "${music_dir}/${current}" "${music_dir}/${old}"
+		printf "%s\\t%s\\n" "${old}" "${current}" >> "${new_state_file}"
+	done < "${old_state_file}"
+	exit
+fi
+
+vprintf "Generating mp3 file list..."
+cd "${music_dir}" || return
+IFS=$'\n'
+list=$(find . -type f -iname "*.mp3" -printf '%P\n')
+cd - 1>/dev/null || return
+
+for i in ${list} ; do
+	new_name="$(head -c 500 /dev/urandom | tr -dc 'a-zA-Z0-9_-' | fold -w 30 | head -n 1).mp3"
+	vprintf "mv \"${music_dir}/$i\" \"${music_dir}/${new_name}\""
+	mv "${music_dir}/${i}" "${music_dir}/${new_name}"
+	printf "%s\\t%s\\n" "${i}" "${new_name}" >> "${new_state_file}"
+done
+vprintf "Done!"
+