From f48d0d553a0cad85352274674db42aaf4b58970f Mon Sep 17 00:00:00 2001
From: Steven Baltakatei Sandoval <baltakatei@gmail.com>
Date: Mon, 15 Jul 2024 21:58:45 +0000
Subject: [PATCH 1/1] feat(user/zeropad.sh):Permit ignoring of file extension
 via arg

---
 user/zeropad.sh | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/user/zeropad.sh b/user/zeropad.sh
index e008b71..ad281b1 100755
--- a/user/zeropad.sh
+++ b/user/zeropad.sh
@@ -1,16 +1,30 @@
 #!/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
-- 
2.30.2