#!/bin/bash
# Desc: Zero-pad working dir files with initial digits for sorting
-# Usage: zeropad.sh
-# Version: 0.0.5
+# Usage: zeropad.sh [str fext]
+# Example: zeropad.sh;
+# zeropad.sh ".jpg";
+# Version: 0.1.0
+
+declare fext; # file extension
list_files() {
# Desc: Lists working directory file basenames
# Usage: list_files
- # Input: none
+ # Input: fext var file extension
# Output: stdout a line-delimited list of file names
- find . -mindepth 1 -maxdepth 1 -type f -exec basename '{}' \; ;
+ if [[ -z "$fext" ]]; then
+ find . -mindepth 1 -maxdepth 1 -type f -exec basename '{}' \; ;
+ else
+ find . -mindepth 1 -maxdepth 1 -type f -exec basename '{}' \; \
+ | grep -E -- "${fext}$" ;
+ fi;
}; # list pwd file basenames
main () {
+ # Read file extension if provided
+ if [[ -n "$1" ]]; then
+ fext="$1";
+ fi;
+
# Find the maximum number of leading digits in the filenames of working dir
max_digits="$(list_files | sed -e 's/[^0-9].*//' | awk '{ if(length > L) L=length } END { print L }')";
# declare -p max_digits; # debug