fix(user/zeropad.sh):Only zero-pad files with leading digits
[BK-2020-03.git] / user / zeropad.sh
1 #!/bin/bash
2 # Desc: Zero-pad working dir files with initial digits for sorting
3 # Usage: zeropad.sh
4 # Version: 0.0.3
5
6 # Find the maximum number of leading digits in the filenames of working dir
7 max_digits="$(ls -1 * | sed 's/[^0-9].*//' | awk '{ if(length > L) L=length } END { print L }')";
8 declare -p max_digits;
9
10 # Loop over the files and rename them
11 while read -r file; do
12 re='^[0-9]+';
13 if [[ ! "$file" =~ $re ]]; then continue; fi;
14
15 # Extract the leading digits
16 digits="$(echo "$file" | sed 's/\([0-9]*\).*/\1/')";
17 # Zero-pad the digits
18 padded_digits="$(printf "%0${max_digits}d" "$digits")";
19 # Construct the new filename
20 new_file="${padded_digits}${file#${digits}}";
21 # Rename the file
22 mv -n "$file" "$new_file"
23 # declare -p file new_file; # debug
24 done < <(find . -mindepth 1 -maxdepth 1 -type f);
25
26 # Author: Steven Baltakatei Sandoval
27 # License: GPLv3+