Re: don't allow vim to launch inside emacs/vim terminals

2016-04-06 1:15 GMT+03:00 Dominique Pellé <dominique.pelle@gmail.com>:
> Andrew Pennebaker <andrew.pennebaker@gmail.com> wrote:
>
>> Please help Vim detect strange terminal environments (e.g. Emacs/Vim
>> shells), and prohibit launching in these. Otherwise, it completely messes up
>> the shell.
>
> What is a "vim shell"? There is no such thing in Vim.

I guess he means https://github.com/Shougo/vimshell.vim. There is also
conque_term, but (even though it is abandoned) this one stated that it
supports running Vim inside, and AFAIR this even works.

It is also possible that system() was meant, but it does not "mess up
the shell" when run in system() (though this does not make Vim that is
run there very useful).

>
> Neovim or emacs have terminal windows, see:
> https://neovim.io/doc/user/nvim_terminal_emulator.html
> But if such terminals doesn't behave like a regular terminal (?),
> then I don't think that it should be up to Vim to cope with their
> deficiencies.
>
> I just tried to launch Vim inside a Neovim terminal, and it seems
> to work fine for me at first sight.

Neovim terminal uses just the same library pangoterm uses. So it
should contain much less bugs then conque with its self-written
terminal emulator implementation: prone to collecting bugs from
terminal emulator implementation itself (escape sequences are tricky
due to being legacy based on many generations of terminals and
terminal emulators) in addition to bugs that exist because Vim buffers
are not prepared for this kind of task.

>
> Dominique
>
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In any case there is no way to reliably detect "strange terminal
environments" generally. One can provide ad-hoc solutions for
vimshell, etc, but even this may be tricky. Just don't run Vim there
editor is not the right place to fix bugs in terminal emulators.

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