Vi and emacs don't properly live update in preview

[mythmon]

Ambassador Martien reports that when saving files using vim and emacs in their default configurations, the CLI does not properly live update and instead shows an error about "file no longer exists".

Question: (I’m new to yarn):

• when I use vi or emacs to edit, say, index.md , yarn says “file no longer exists: /index.md”, and the page in Safari does not update;
• when I edit a copy of index.md and use that to overwrite index.md, yarn sees the update and updates the browser page.

What editor should I use?

I think I found it. In vi , :set nowritebackup) :

• inode stays the same;
• only modify and change timestamps change. Access and birth remain the same.

[Fil]

it's probably because they don't edit a file (with the same inode) but replace it? I think we've seen that issue already (can't find the reference atm).

related #157

[eitanlees]

For Neovim I added the following to ~/.config/nvim/init.lua

vim.opt.backupcopy = 'yes'

and that alleviated the issue.

[Fil]

fixed with #1127

[mbostock]

I don’t see it fixed in vi. Can you confirm? When I save changes in vi, the file is written, but the preview server doesn’t see anything as changed, so I have to reload in the browser.

[mbostock]

It seems like the first save in vi triggers a reload, but subsequent saves (after the file no longer exists message) do not trigger updates.

[mbostock]

I think the problem is a race condition where the await for lazy config #695 here handleWatch(socket, req, await this._readConfig()) means we can miss the _hello_↑ message that is sent immediately upon connect.

[Fil]

You're right, it's still failing.

[nelsonspbr]

Oh wow, I spent more time than I'd like to admit thinking why Observable framework doesn't react to changes in a simple file. I was using Vim to edit the file.

[mbostock]

@nelsonspbr This was fixed a few months ago. Are running an old version of Framework? If you’re still experiencing a problem with the latest version of Framework, please file a new issue with steps to reproduce. I’ve just tested locally using vi and live preview is working as expected. Thank you.