+TITLE: scala-ts-mode

+PROPERTY: LOGGING nil

• Introduction ~scala-ts-mode~ is a [[https://tree-sitter.github.io/tree-sitter/][tree-sitter]] based GNU Emacs major mode built on top of the Emacs 29+ ~treesit~ library. It provides the following features in a Scala buffer-
  1. efficient font-locking using tree-sitter
  2. ~imenu~ integration
  3. indentation support using tree-sitter

The major-mode is mostly complete and in a very usable state currently. Improvements will come as I find bugs, edge cases, more use cases or the upstream grammar evolves.

• Requirements To use the package, the following dependencies are required.

  1. GNU Emacs 29+, built with support for tree-sitter.
  2. tree-sitter grammar for Scala (you can use the ~treesit-install-language-grammar~ function for installing it.)

• Installation To install the package, you can use any Emacs package manager of your choice, to pull the package either from MELPA or source. For example, with straight.el, you can do the following -

** MELPA

+begin_src emacs-lisp

(straight-use-package 'scala-ts-mode)

+end_src

** Source

+BEGIN_SRC emacs-lisp

(straight-use-package '(scala-ts-mode :type git :host github :repo "KaranAhlawat/scala-ts-mode"))

+END_SRC

Then, you can simply call ~scala-ts-mode~ in a Scala buffer.

• Configuration You may wish to customize ~treesit-font-lock-level~, using ~M-x customize-variable~ or by adding a line such as this to your user init file:

+begin_src emacs-lisp

(setq treesit-font-lock-level 4)

+end_src

The default font lock level is 3. At that level, not as many constructs are highlighted as you might like. Increasing it to 4 results in richer highlighting.

• Contributions Contributions are welcome! These can be in the form of PRs, Issues, or any other way you can think of. This is my first package, so please don't hold back :)

• License GPLv3