#!/bin/bash
# Desc: Zero-pad working dir files with initial digits for sorting
# Usage: zeropad.sh
-# Version: 0.0.2
+# Version: 0.0.3
# Find the maximum number of leading digits in the filenames of working dir
max_digits="$(ls -1 * | sed 's/[^0-9].*//' | awk '{ if(length > L) L=length } END { print L }')";
declare -p max_digits;
# Loop over the files and rename them
-for file in *; do
- # Extract the leading digits
- digits="$(echo "$file" | sed 's/\([0-9]*\).*/\1/')";
- # Zero-pad the digits
- padded_digits="$(printf "%0${max_digits}d" "$digits")";
- # Construct the new filename
- new_file="${padded_digits}${file#${digits}}";
- # Rename the file
- mv -n "$file" "$new_file"
- # declare -p file new_file; # debug
-done;
+while read -r file; do
+ re='^[0-9]+';
+ if [[ ! "$file" =~ $re ]]; then continue; fi;
+
+ # Extract the leading digits
+ digits="$(echo "$file" | sed 's/\([0-9]*\).*/\1/')";
+ # Zero-pad the digits
+ padded_digits="$(printf "%0${max_digits}d" "$digits")";
+ # Construct the new filename
+ new_file="${padded_digits}${file#${digits}}";
+ # Rename the file
+ mv -n "$file" "$new_file"
+ # declare -p file new_file; # debug
+done < <(find . -mindepth 1 -maxdepth 1 -type f);
# Author: Steven Baltakatei Sandoval
# License: GPLv3+