copy.sh

dest="../dst-test"; find . -type d -mindepth 1 -exec mkdir -p "$dest/"{} \; find . -type f -print0 | while IFS= read -r -d '' file; do if [[ "$(basename "$(dirname "$file")")" =~ ^[0-9]{4} ]]; then newfile=$(basename "$file"); else newfile=$file; fi; if [[ -f "$dest/$newfile" ]]; then i=1; until [[ ! -f "$dest/$newfile-$i" ]]; do ((i++)); done; newfile="$file-$i"; fi; echo "mv $file $dest/$newfile"; done