vector_mulltiline.toml

[transforms.multiline]
  type = "lua"
  inputs = ["level"]
  version = "2" # required

  # Hooks
  hooks.process = """
  function (event, emit)
    if string.match(event.log.message, "^%s") == nil
    then
      if string.sub(event.log.message, -1) == "}"
      then
        if merged_event ~= nil
        then
          event.log.message = merged_event.log.message .. "\\r\\n" .. event.log.message
        end

        emit(event)

        event = nil
        merged_event = nil
      end

      if merged_event ~= nil
      then
        emit(merged_event)
      end

      merged_event = event
    else
      merged_event.log.message = merged_event.log.message .. "\\r\\n" .. event.log.message
    end
  end
  """