Buf{something} autocommand isn't always run

[arp242]

When I do: vim . the BufCreate autocommand isn't executed, but if I do vim -c ':e .' it is.

I see a lot of noau in the script; I'm not sure why you would ever need that? If I understand the intention of this plugin correct, it's designed to be "just a buffer", so stuff like running autocommands seems to be a part of that to me?

At any rate, both methods (vim . and :e .) should probably do the same.

[justinmk]

In the cases you mentioned, Vim creates the buffer before Dirvish ever sees it. Any autocmd you set up won't get triggered in the vim . case. Can be verified by adding au BufCreate * echom localtime() in vimrc and then compare vim foo to vim -c 'e foo', where foo is a non-existent file.

Note that :h BufCreate says it's for when a buffer is added to the buffer list. But dirvish buffers are 'nobuflisted', which I would think is generally preferable.

Regarding noau: it's in s:do_open to avoid infinite loop, though that's avoidable in other ways. The other noau are mostly when tickling the alternate buffer, and those cases could be avoided in Vim 7.4.7xx.

[arp242]

Right. I picked the wrong example with BufCreate as I as I misremembered the subtle differences between the various autocmds :-/ I would expect some auto autocommand to be run; BufRead*? This can still be done manually with doautocmd btw.

The problem is that one of my plugins wants to create a b: variable for every buffer. I can use BufEnter, but that gets run every time a buffer is entered, so it's not exactly ideal...

[justinmk]

This can still be done manually with doautocmd btw.

Yep, that's what I will do if removing noau judiciously is unfeasible.

[justinmk]

Documentation of BufRead[Post] mentions that it will not be triggered for buftype=nofile ("Not used when the file doesn't exist").

After removing all cases of :noau, BufNew works for :edit <nothing> and :edit <directory>. But it never works for :Dirvish ... (nor do BufAdd, BufNewFile, BufReadPost, and BufFilePost, for either case).

So :noau doesn't seem to be the root cause of this problem. Vim considers directory-like paths an "error" (which is a Vim bug, IMO), maybe that's related.

Dirvish now fires BufNew when a directory is first visited. @Carpetsmoker let me know if you have any better insight or suggestions.