Function: nix-ts-mode

nix-ts-mode is an interactive and natively compiled function defined in nix-ts-mode.el.

Signature

(nix-ts-mode)

Documentation

Major mode for editing Nix expressions, powered by treesitter.

In addition to any hooks its parent mode prog-mode might have run, this mode runs the hook nix-ts-mode-hook, as the final or penultimate step during initialization.

Key Bindings

This command is not in any keymaps.

Source Code

;; Defined in /nix/store/gfg1ybfpvhh7fr396dh1axr72lcm71n0-emacs-packages-deps/share/emacs/site-lisp/elpa/nix-ts-mode-20260705.1600/nix-ts-mode.el
;;;###autoload
(define-derived-mode nix-ts-mode prog-mode "Nix"
  "Major mode for editing Nix expressions, powered by treesitter.

\\{nix-ts-mode-map}"
  :syntax-table nix-ts-mode--syntax-table

  (when (treesit-ready-p 'nix)
    (treesit-parser-create 'nix)

    ;; Font locking
    (setq-local treesit-font-lock-settings nix-ts-mode--font-lock-settings)

    (setq-local treesit-font-lock-feature-list
                '((comment builtin constant)
                  (string path uri)
                  (number operator definition function-call keyword)
                  (parameter property variable bracket delimiter ellipses punctuation paren-base parameter-atpattern error)))

    ;; Comments
    (setq-local comment-start "# ")
    (setq-local comment-start-skip "#+\\s-*")

    ;; Indentation
    (setq-local treesit-simple-indent-rules nix-ts-mode-indent-rules)

    ;; Imenu.
    (setq-local treesit-simple-imenu-settings
                `((nil "\\`binding\\'" nil nil)))

    ;; Navigation.
    (setq-local treesit-defun-type-regexp (rx (or "binding")))
    (setq-local treesit-defun-name-function #'nix-ts-mode--defun-name)

    (treesit-major-mode-setup))

  (when (functionp 'derived-mode-add-parents)
    (derived-mode-add-parents 'nix-ts-mode '(nix-mode))))