Re: Validating tree-sitter major modes and grammar

[Yuan Fu <casouri@gmail.com>]

> On Dec 24, 2024, at 4:36 AM, Peter Oliver <p.d.oliver@mavit.org.uk> wrote:
> 
> On Mon, 23 Dec 2024, Yuan Fu wrote:
> 
>>> On Dec 22, 2024, at 4:44 PM, Björn Bidar <bjorn.bidar@thaodan.de> wrote:
>>> 
>>> Yuan Fu <casouri@gmail.com> writes:
>>> 
>>>> Continuing from the tree-sitter maternity thread, I cooked up some
>>>> script to go over each builtin tree-sitter mode, clone the grammars it
>>>> uses, and check whether the font-lock queries are compatible with the
>>>> latest version of the grammar. If everything works fine, the script
>>>> adds some comment in the source file listing the version that was
>>>> checked.
>>> 
>>> Oh that sounds very good. This could be a good workaround for the sort
>>> of fast and lose nature of tree-sitter.
>> 
>> Great. Do you think the “verified version” comment will be helpful for packagers?
> 
> It helps answer the question, “I am building a new Emacs release.  Do I need to update these Tree-sitter parsers?”.
> 
> However, as a parser packager, I also need to answer the question, “This parser has released a new version.  Can I package it now, or do I need to wait for Emacs 30?  Emacs 31?”.  A static comment in the source code of a released version of Emacs will likely be too out-of-date to answer that.
> 
> Other ideas:
> 
> - Run these checks regularly (from https://emba.gnu.org/, perhaps?) for the most-recent Emacs release, outputting a report or webpage that can be referred to by packagers.
> 
> - Include a function in Emacs that packagers can call themselves to check the compatibility of installed parsers.  They could run this check every time they build an updated parser (either manually, as a part of the package build, or as a part of their distribution’s automated CI testing).

I can add another script that finds the latest “version” that’s compatible with a builtin mode. The comments will be helpful for packaging a new Emacs release. And the new script can help with packaging new grammar versions with Emacs.

Yuan