From 9efb42f9443ec8ef5765420c8a919490e756a2bd Mon Sep 17 00:00:00 2001
From: bryan <bryanroessler@gmail.com>
Date: Sat, 30 Nov 2024 19:41:38 -0500
Subject: [PATCH] Refactor image backup

---
 openwrtbuilder | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/openwrtbuilder b/openwrtbuilder
index 34c8bbd..51cc2f8 100755
--- a/openwrtbuilder
+++ b/openwrtbuilder
@@ -618,19 +618,15 @@ extract() {
 }
 backup_image() {
   debug "${FUNCNAME[0]} $*"
-  local file="$1"
-  local dir="$2"
-  local count=1
+  local file="$1" dir="$2" count=1
   [[ -f $file ]] || return 1
   local creation_date
   creation_date=$(stat -c %w "$file" 2>/dev/null || stat -c %y "$file" | cut -d' ' -f1)
+  creation_date=${creation_date:-unknown} # Default to "unknown" if no creation date
+  [[ "$creation_date" == "-" ]] && creation_date="unknown"
+  local base_name; base_name=$(basename "$file")
   execute mkdir -p "$dir"
-  local base_name
-  base_name=$(basename "$file")
-  while [[ -e "$dir/$creation_date-$base_name.bk.$count" ]]; do
-    ((count++))
-  done
-  debug mv "$file" "$dir/$creation_date-$base_name.bk.$count"
+  while [[ -e "$dir/$creation_date-$base_name.bk.$count" ]]; do ((count++)); done
   execute mv "$file" "$dir/$creation_date-$base_name.bk.$count"
 }
 verify() {