file_path for remote LiveBook files?

[mrluc]

Amazing project btw 🙏

All of my livebooks are in S3-compatible storage, as supported by LiveBook -- the mcp server's tool description for the fetch_livemd_outputs tool mentions that it should be an absolute path, and gives the example of a filesystem path.

But is it possible/planned that an S3-compatible path could work, since LB supports that and uses FSS? Or is this code actually using it to eg. read the LiveBook file, and send/process its contents?

[thmsmlr]

It uses the path to look up the Livebook.Session process. I would have to check whether that internal state variable is set to an S3 path when you use it that way. I haven't tried that.

You can try messing around with this code in a Livebook session to poke around and see what's there,

livebook_tools/lib/livebook_tools/sync.ex

Lines 2 to 28 in 2c1f57f

	def find_livebook_session_pid_for_file(node, file_path) do
	:rpc.call(node, Code, :eval_quoted, [
	quote do
	:erlang.processes()
	|> Enum.filter(fn pid ->
	info = Process.info(pid)
	case info[:dictionary][:"$initial_call"] do
	{Livebook.Session, _, _} -> true
	_ -> false
	end
	end)
	|> Enum.find_value(fn pid ->
	state = :sys.get_state(pid)
	file_path = get_in(state, [Access.key!(:data), Access.key!(:file), Access.key!(:path)])
	if file_path == unquote(file_path) do
	pid
	end
	end)
	end
	])
	|> case do
	{pid, _} when is_pid(pid) -> {:ok, pid}
	_ -> {:error, :no_livebook_session}
	end
	end