Unable to get tree sitter to work

[CeNiEi]

Running Emacs 30.1 on MacOS 15.1. This is my init.el file

(require 'package)
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/") t)
;; Comment/uncomment this line to enable MELPA Stable if desired.  See `package-archive-priorities`
;; and `package-pinned-packages`. Most users will not need or want to do this.
;;(add-to-list 'package-archives '("melpa-stable" . "https://stable.melpa.org/packages/") t)
(package-initialize)

(use-package rust-mode
  :init
  (setq rust-mode-treesitter-derive t))

Upon opening a rust buffer, the Warning buffer shows

Warning (treesit): Cannot activate tree-sitter, because language grammar for rust is unavailable (version-mismatch): 15

I can confirm that the language object is present at ~/.emacs.d/tree-sitter

[IceAsteroid]

I also cannot make it work by setting the variable to t, but I managed to make it work with the following code. You can take it as a reference

(defun my-setup/rust-ts-mode ()
  ;; Can work without setting `rust-mode-treesitter-derive` to t
  ;;,add it here just to make sure.
  (setq rust-mode-treesitter-derive t)
  ;; Remove the original cons cell for rust
  (setq auto-mode-alist (delete '("\\.rs\\'" . rust-mode) auto-mode-alist))
  ;; Use `rust-ts-mode` instead of `rust-mode` for .rs files.
  (add-to-list 'auto-mode-alist '("\\.rs\\'" . rust-ts-mode))
  )
(my-setup/rust-ts-mode)

;; If you use eglot, don't forget to start eglot when in rust-ts-mode with the following code
(defun my/eglot-in-rust-mode-hook ()
  (eglot-ensure)
  )
(add-hook 'rust-ts-mode-hook 'my/eglot-in-rust-mode-hook)

[yonta]

This occurs with the latest libtree-sitter-rust.so installed via tools like treesit-auto.
The cause is that Emacs 30.1 does not yet support ABI version 15.
I believe it can be resolved by checking out the tree-sitter-rust source at version v0.23.3, building libtree-sitter-rust.so manually, and placing it in a directory included in Emacs’s library search path.
https://github.com/tree-sitter/tree-sitter-rust.git

[thenightmail]

Thanks for the tip. I got it to work on emacs 30.1 by using make with https://github.com/tree-sitter/tree-sitter-rust/releases/tag/v0.23.2 and put the .so file in my tree-sitter directory.

Relevent elisp functions are:

(treesit-library-abi-version)

(treesit-language-available-p 'rust)

(treesit-language-abi-version 'rust)

Also, I had treesit-auto enabled which drove me insane cause it kept auto installing things. Make sure that is disabled.

[zzeitt]

Specify the REVISION of treesit-sitter-rust hub works for me.

(use-package treesit
  :init
  (add-to-list 'treesit-language-source-alist
               '(rust . ("https://github.com/tree-sitter/tree-sitter-rust" "v0.23.2"))))

Doc about treesit-language-source-alist:

The value should be an alist where each element has the form

(LANG . (URL REVISION SOURCE-DIR CC C++))

Only LANG and URL are mandatory. LANG is the language symbol.
URL is the URL of the grammar's Git repository or a directory
where the repository has been cloned.

REVISION is the Git tag or branch of the desired version,
defaulting to the latest default branch.

Ref:

• Re: Treesitter grammar for Rust
• Re: Treesitter grammar for Rust