servePlumb throws error message: plumb file does not exist

[benghancock]

Hi Russ,

Thanks for the todo package - it's really nice to have this functionality inside of Acme.

I've experienced an issue where each time I start with todo -a, I get an +Errors window with this message:

plumb: plumb file does not exist

Upon investigation, this appears to be thrown by the servePlumb() function:

todo/acme.go

Lines 435 to 441 in d56e308

	func servePlumb() {
	kind := strings.Trim(root, "/")
	fid, err := plumb.Open(kind, 0)
	if err != nil {
	acme.Err(root, fmt.Sprintf("plumb: %v", err))
	return
	}

I modified the source and rebuilt, and it seems that fid is consistently <nil> and that this function simply returns at line 440. The other effect of this seems to be that the call to acme.AutoExit(true) does not work; even after deleting the last managed window, the todo process stays running.

If I comment out the call to go servePlumb() here ...

todo/acme.go

Line 42 in d56e308

go servePlumb()

... then the plumb: error message does not appear and autoExit works as expected; the functionality of todo seems unaffected. I imagine that there is an impact, though; I just haven't figured out what it is yet.

From my limited understanding of the plumb package and 9p, it seems that this function is trying to open a file at plumb/todo on the 9P server, which (for me at least) does not exist - though I do have plumb/rules. Is this correct, and if so, is there documentation on what this file is used for and how it should be created?

I'm running plan9port under OpenBSD 7.1.

[oec]

@benghancock the required plumb file is not provided by the todo tool, but you have to provide it by an plumbing rule. F.e. on my system, I have a plumbing file in $HOME/lib/plumbing with the following content:

# to update: cat $HOME/lib/plumbing | 9p write plumb/rules
#
# declarations for todo
plumb to todo

include initial.plumbing

When I start plumber before starting acme and todo, the plumb file todo will exist, ready to be used by todo.