straight.el + use-package + tree-sitter

init.el

(defvar bootstrap-version)
(let ((bootstrap-file
       (expand-file-name "straight/repos/straight.el/bootstrap.el" user-emacs-directory))
      (bootstrap-version 5))
  (unless (file-exists-p bootstrap-file)
    (with-current-buffer
        (url-retrieve-synchronously
         "https://raw.githubusercontent.com/raxod502/straight.el/develop/install.el"
         'silent 'inhibit-cookies)
      (goto-char (point-max))
      (eval-print-last-sexp)))
  (load bootstrap-file nil 'nomessage))

;;; ^ Standard straight.el bootstrapping.

(straight-use-package 'use-package)
(require 'use-package)

(use-package rustic
  :straight t)

(use-package tree-sitter
  :straight (tree-sitter :type git
                         :host github
                         :repo "ubolonton/emacs-tree-sitter"
                         :files ("lisp/*.el"))
  :config (add-to-list 'tree-sitter-major-mode-language-alist '(rustic-mode . rust))
  :hook ((python-mode rustic-mode) . tree-sitter-hl-mode))

(use-package tree-sitter-langs
  :straight (tree-sitter-langs :type git
                               :host github
                               :repo "ubolonton/emacs-tree-sitter"
                               :files ("langs/*.el" "langs/queries"))
  :after tree-sitter)