Multithreaded recursive upload to dropbox using dbxcli with resume

script.sh

# Uploads everything in the current directory to Dropbox UPLOAD directory (change line 7)
# Configured for 2 threads, any more and you get api throttling errors

find . -type f -print0 | xargs -0 -n 1 -P 2 -I {} sh -c '
    file="{}"
    log_file="uploaded_files.log"
    dropbox_path="UPLOAD${file#.}"
    
    # Check if file is already in log
    if grep -qxF "$file" "$log_file"; then
        echo "Skipping already uploaded file: $file"
    else
        # Echo and upload, then log the file on success
        echo "dbxcli put \"$file\" \"$dropbox_path\""
        if dbxcli put "$file" "$dropbox_path"; then
            echo "$file" >> "$log_file"
        else
            echo "Failed to upload: $file" >&2
        fi
    fi
'