feat: add --copy mode to reorganize-music.sh for safe migration

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/reorganize-music.sh

@@ -10,11 +10,12 @@
 # backend/lib/ytdlp.js and backend/lib/metadata.js.
 #
 # Usage:
-#   ./reorganize-music.sh <source_dir> <dest_dir> [--move] [--clean]
+#   ./reorganize-music.sh <source_dir> <dest_dir> [--copy] [--move] [--clean]
 #
 #   <source_dir>   Root of the old genre-folder tree (searched recursively)
 #   <dest_dir>     Music root to write into  (can be the same as source)
-#   --move         Actually move files (default: dry-run preview only)
+#   --copy         Copy files to new location (originals kept — safe default)
+#   --move         Move files to new location (originals removed)
 #   --clean        After moving, remove empty directories under <source_dir>
 #
 # Requires: ffprobe (part of ffmpeg)
@@ -29,9 +30,11 @@ fi
 
 SOURCE="$(realpath "$1")"
 DEST="$(realpath "$2")"
+DO_COPY=false
 DO_MOVE=false
 DO_CLEAN=false
 for arg in "${@:3}"; do
+  [[ "$arg" == "--copy"  ]] && DO_COPY=true
   [[ "$arg" == "--move"  ]] && DO_MOVE=true
   [[ "$arg" == "--clean" ]] && DO_CLEAN=true
 done
@@ -71,9 +74,11 @@ echo "NovaSonic Music Reorganiser"
 echo "Source : $SOURCE"
 echo "Dest   : $DEST"
 if $DO_MOVE; then
-  echo "Mode   : MOVE  (files will be moved)"
+  echo "Mode   : MOVE  (files will be moved, originals removed)"
+elif $DO_COPY; then
+  echo "Mode   : COPY  (files will be copied, originals kept)"
 else
-  echo "Mode   : DRY-RUN  (nothing will change — add --move to execute)"
+  echo "Mode   : DRY-RUN  (nothing will change — add --copy or --move to execute)"
 fi
 echo "──────────────────────────────────────────────────────────────────────"
 
@@ -151,6 +156,13 @@ while IFS= read -r -d '' file; do
       printf '     ERROR moving: %s\n' "$file" >&2
       ERRORS=$((ERRORS + 1))
     fi
+  elif $DO_COPY; then
+    if mkdir -p "$target_dir" && cp -- "$file" "$target"; then
+      MOVED=$((MOVED + 1))
+    else
+      printf '     ERROR copying: %s\n' "$file" >&2
+      ERRORS=$((ERRORS + 1))
+    fi
   else
     MOVED=$((MOVED + 1))
   fi
@@ -162,7 +174,7 @@ done < <(find "$SOURCE" -type f \( \
 \) -print0 | sort -z)
 
 # ── Remove empty source dirs (optional) ──────────────────────────────────────
-if $DO_MOVE && $DO_CLEAN; then
+if $DO_MOVE && $DO_CLEAN; then  # --clean only applies to --move (copy keeps originals)
   echo ""
   echo "Cleaning empty directories under $SOURCE …"
   find "$SOURCE" -mindepth 1 -type d -empty -delete 2>/dev/null && \
@@ -173,8 +185,10 @@ fi
 echo "──────────────────────────────────────────────────────────────────────"
 if $DO_MOVE; then
   echo "Done: $MOVED moved, $SKIPPED skipped, $ERRORS errors"
+elif $DO_COPY; then
+  echo "Done: $MOVED copied, $SKIPPED skipped, $ERRORS errors"
 else
-  echo "Dry-run: $MOVED would be moved, $SKIPPED already correct or conflicting"
+  echo "Dry-run: $MOVED would be processed, $SKIPPED already correct or conflicting"
   echo ""
-  echo "Re-run with --move to execute.  Add --clean to also remove empty source dirs."
+  echo "Re-run with --copy to copy (safe) or --move to move.  Add --clean to remove empty source dirs after --move."
 fi