sync newer images, LoRA page update

sync-newer-images

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+#!/bin/bash
+#
+# sync-newer-images — For each top-level image in SRC, find any matching
+# filename recursively under DEST and copy over it if SRC is newer.
+# Works on Linux and macOS (bash 3.2+ compatible).
+
+usage() {
+    cat <<'EOF'
+Usage: sync-newer-images [options] <destination> <source>
+
+For each top-level image in source, find any matching filename recursively
+under destination and copy over it if the source file is newer.
+
+Arguments:
+  destination   Path to copy TO
+  source        Path to copy FROM
+
+Options:
+  -h, --help    Show this help message and exit
+EOF
+    exit 0
+}
+
+for arg in "$@"; do
+    case "$arg" in
+        -h|--help) usage ;;
+    esac
+done
+
+if [ $# -lt 2 ]; then
+    echo "Error: destination and source are required" >&2
+    echo "Usage: sync-newer-images <destination> <source>" >&2
+    exit 1
+fi
+
+DEST="$1"
+SRC="$2"
+
+if [ ! -d "$DEST" ]; then
+    echo "Error: destination '$DEST' is not a directory" >&2
+    exit 1
+fi
+
+if [ ! -d "$SRC" ]; then
+    echo "Error: source '$SRC' is not a directory" >&2
+    exit 1
+fi
+
+copied=0
+
+for srcfile in "$SRC"/*; do
+    [ -f "$srcfile" ] || continue
+
+    ext="${srcfile##*.}"
+    case "$(echo "$ext" | tr '[:upper:]' '[:lower:]')" in
+        jpg|jpeg|png|gif|heic|webp|bmp|tiff|tif) ;;
+        *) continue ;;
+    esac
+
+    filename="${srcfile##*/}"
+    while IFS= read -r destfile; do
+        if [ -f "$destfile" ] && [ "$srcfile" -nt "$destfile" ]; then
+            cp -v "$srcfile" "$destfile"
+            copied=$((copied + 1))
+        fi
+    done < <(find "$DEST" -type f -name "$filename" 2>/dev/null)
+done
+
+echo "Copied ${copied} newer image(s) from ${SRC} into ${DEST}"