Support /var/folders/... socket path on MacOS

[echo-bravo-yahoo]

Register syncing to nvim doesn't work. I've:

• Run zstyle :zle:evil-registers:'[A-Za-z%#]' editor nvim in a shell, then attempted to cut lines ("zdd) to both pre-existing and then newly-created nvim instances.
• Added zstyle :zle:evil-registers:'[A-Za-z%#]' editor nvim to my .zshrc after zplug load and attempted to use it as above.
• Disabled NVM lazy load on a hunch that nvim resolving to a lazy load function may have been breaking evil-registers.

None of these allowed me to successfully sync to nvim, and I don't know where to go next for debugging.

OS X, NVIM v0.10.0

[xPMo]

• Check to see if the setup-editor ran correctly.
  • Run zstyle -L ':zle:evil-registers:*'
  • Do you see lines with nvim-put and nvim-yank?
• Check that the correct server socket is getting selected.
  • Inside Nvim: :echo v:servername
  • Run print -l {$XDG_RUNTIME_DIR,/tmp}/nvim*(N=oN).
  • Is Nvim's server socket the first in the list?
• Test the server connection.
  • Yank some text into the register z in Nvim.
  • Run nvim --headless --server $socket --remote-expr "getreg('z')".
  • Do you get the text on stdout?

[echo-bravo-yahoo]

Hi - sorry for the delay on this!

It looks like nvim isn't being detected at all:

$ zstyle -L ':zle:evil-registers:*'
zstyle ':zle:evil-registers:[A-Za-z%#]' editor nvim
zstyle :zle:evil-registers:/ put -v LASTSEARCH
zstyle :zle:evil-registers:. put -v '__zvm_track_insert[i]'
zstyle ':zle:evil-registers:[*+]' put - pbpaste
zstyle ':zle:evil-registers:[*+]' yank - pbcopy

Additionally, $XDG_RUNTIME_DIR is undefined, and there's no /tmp/nvim* files or directories, so the print command returns nothing. The nvim socket appears to be in var/folders/... instead. I've left the whole path intact below except for the username, which I've replaced with USER.

$ print -l {$XDG_RUNTIME_DIR,/tmp}/nvim*(N=oN)

$ nvim --clean --headless --cmd ":echo v:servername | :exit"
/var/folders/h2/08yv5z0j3qx0rmy3nps6k6jc0000gn/T/nvim.USER/MdzxrF/nvim.96270.0

Unsuprisingly, given this, the last command hangs indefinitely:

$ nvim --headless --server $socket --remote-expr "getreg('z')"
< hangs indefinitely >

[xPMo]

/var/folders/h2/08yv5z0j3qx0rmy3nps6k6jc0000gn/T/nvim.USER/MdzxrF/nvim.96270.0

Okay then, thanks! I'm not a Mac user, so I might need some help on figuring out how we can reliably fetch that exact path to the socket. How is neovim installed for you?

[xPMo]

Some sleuthing led me to neovim/neovim#20865, where this folder can probably be found via

nvim --clean --headless --cmd ':echo tempname() | :exit'

Could you also check nvim --headless --cmd ':echo stdpath('run') | :exit'? I'm going to guess that it's either empty or the same as tempname() for you, since you don't have XDG_RUNTIME_DIR set.

Finally, what does echo =nvim(:A) (in Zsh) give you?

[echo-bravo-yahoo]

nvim is installed via homebrew.

# both stdpath and tempname return the same directory that only exists while the nvim process is running (but tempname appends `/0`).
$ nvim --clean --headless --cmd ':echo stdpath("run") | echo tempname() | :exit'
/var/folders/h2/08yv5z0j3qx0rmy3nps6k6jc0000gn/T/nvim.USER/egAknC
/var/folders/h2/08yv5z0j3qx0rmy3nps6k6jc0000gn/T/nvim.USER/egAknC/0

# this is the path to the binary, but i don't see anything else relevant in `/opt/homebrew/Cellar/neovim/VERSION/` 
$ echo =nvim(:A)
/opt/homebrew/Cellar/neovim/0.10.2_1/bin/nvim

it looks like OSX sets $TMPDIR, and the nvim path might be buildable from that:

$ echo $TMPDIR
/var/folders/h2/08yv5z0j3qx0rmy3nps6k6jc0000gn/T/

[xPMo]

Is that a literal nvim.USER, or is it nvim.$USER? I have an /tmp/nvim.pmo/ directory which holds some nvim data.

In any case, I committed a first attempt which just matches $TMPDIR/nvim.*/*/nvim*(=), checkout dev to see if it works.