Re: Validating tree-sitter major modes and grammar

[Peter Oliver]

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version of Emacs will likely be too out-of-date to answer that.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).

--
Peter Oliver