Re: Make all tree-sitter modes optional

[Dmitry Gutov]

On 18/01/2023 05:34, Eli Zaretskii wrote:
> > > > Similarly, we can add such line to the Commentary of every ts mode, or even to 
> > > > the major mode docstrings
> > > IF we do that, it’d be better to instruct users to use major-mode-remap-alist, 
> > > since it’s easier to understand and use IMO.
> > Sure. This way we also avoid duplicating the file name regexp.
> The purpose of major-mode-remap-alist doesn't fit such use, so this
> proposal is a no-go.

Its NEWS entry says:

** New user option 'major-mode-remap-alist' to specify favorite major modes.
This user option lets you remap the default modes (e.g. 'perl-mode' or
'latex-mode') to your favorite ones (e.g. 'cperl-mode' or
'LaTeX-mode') without having to use 'defalias', which can have
undesirable side effects.

If we leave it to the user to add an entry to that variable, we don't 
have to worry whether tree-sitter support is compiled and the respective 
grammar is available -- the user can ensure that. So there will be no 
need for a treesit-available-p check.

Seems like a perfect fit.