bug#60961: 29.0.60; Compiling emacs-29 without treesitter outputs warnings

[Theodor Thornhill via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Robert Pluim <rpluim@gmail.com>
>> Date: Fri, 20 Jan 2023 11:30:33 +0100
>> 
>> 
>> This is emacs-29 as of 6b2f85caa6c
>> 
>>   ELC      progmodes/csharp-mode.elc
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>>   ELC      progmodes/dockerfile-ts-mode.elc
>>   ELC      progmodes/go-ts-mode.elc
>>   ELC      progmodes/java-ts-mode.elc
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>>   ELC      progmodes/js.elc
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>>   ELC      progmodes/json-ts-mode.elc
>>   ELC      progmodes/python.elc
>>   ELC      progmodes/ruby-mode.elc
>>   ELC      progmodes/ruby-ts-mode.elc
>>   ELC      progmodes/rust-ts-mode.elc
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>>   ELC      progmodes/typescript-ts-mode.elc
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>>   Warning (treesit): Cannot activate tree-sitter, because tree-sitter library is not compiled with Emacs
>
> Yes, I've seen these as well.  The reason is that some modes 'require'
> c-ts-mode, because they want to use their comment-related functions.
> But the changes I made recently call treesit-ready-p when c-ts-mode is
> being loaded, and that emits the warning.  I can shut up the warning
> by calling treesit-ready-p with a non-nil QUIET argument, but then the
> warning will not be emitted if users load c-ts-mode from their init
> files or manually, which is not good.  I tried several other
> solutions, but they either didn't work or were not clean enough for my
> palate.
>
> Yuan/Theo, please find a solution for this.  If no better idea comes
> up, I think the c-ts-mode functions that other modes want to use
> should be moved to a separate file, and that file that can be
> 'require'd by all those which want it, including by c-ts-mode.el.
>

Yeah, I was hoping to actually just allowing some duplication of code,
until some "best practice" emerges the coming months, and we can make a
treesit-common-lib.el or something like that.

So I can either just make sure that no modes require across modes, or
make that "lib" right now.  What do you think?

Theo