stan-ts-mode

A major mode for editing Stan files in Emacs based on tree-sitter-stan.

It works well when paired with the stan-language-server.

Usage

When using Emacs 29+ ensure you have compiled with treesit support.

The following init.el snippet is what I use:

(require 'package)
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/") t)
;; can also pull from MELPA stable, if desired:
;; (add-to-list 'package-archives '("melpa-stable" . "https://stable.melpa.org/packages/") t)
(package-initialize)


(use-package treesit
  :if (treesit-available-p)
  :ensure nil
  :config
  (setq treesit-language-source-alist
      '((stan . ("https://github.com/WardBrian/tree-sitter-stan" "v0.3.0" "grammars/stan/src"))
        (stanfunctions . ("https://github.com/WardBrian/tree-sitter-stan" "v0.3.0" "grammars/stanfunctions/src"))))
  (unless (treesit-language-available-p 'stan)
    (treesit-install-language-grammar 'stan))
  (unless (treesit-language-available-p 'stanfunctions)
    (treesit-install-language-grammar 'stanfunctions)))

(use-package stan-ts-mode
  :requires treesit
  :mode (("\\.stan\\'" . stan-ts-mode) ("\\.stanfunctions\\'" . stan-functions-ts-mode))
  :defer t
  :ensure t)

We also recommend setting up elgot with the stan-language-server.

Preview