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;;; mm-treesit.el --- Tree-Sitter configuration -*- lexical-binding: t; -*-
(unless (treesit-available-p)
(error "Tree-Sitter is not available."))
^L
;;; Tree-Sitter Variables
(defvar mm-treesit-language-remap-alist
'((cpp . c++)
(gomod . go-mod)
(javascript . js)
(vim . vimscript))
"TODO")
(setopt treesit-font-lock-level 4)
(setopt treesit-language-source-alist
'((c "https://github.com/tree-sitter/tree-sitter-c")
(cpp "https://github.com/tree-sitter/tree-sitter-cpp")
(css "https://github.com/tree-sitter/tree-sitter-css")
(go "https://github.com/tree-sitter/tree-sitter-go")
(gomod "https://github.com/camdencheek/tree-sitter-go-mod")
(gsp "git://git.thomasvoss.com/tree-sitter-gsp.git")
(html "https://github.com/tree-sitter/tree-sitter-html")
(javascript "https://github.com/tree-sitter/tree-sitter-javascript")
(python "https://github.com/tree-sitter/tree-sitter-python")
(typescript "https://github.com/tree-sitter/tree-sitter-typescript"
"master" "typescript/src")
(vim "https://github.com/tree-sitter-grammars/tree-sitter-vim")
(vue "https://github.com/ikatyang/tree-sitter-vue")))
^L
;;; Install Missing Parsers
(defun mm-treesit-sync-sources ()
"Sync Tree-Sitter parsers.
Reinstall the Tree-Sitter parsers specified by
`treesit-language-source-alist'."
(interactive)
(let ((total (length treesit-language-source-alist))
(count 0)
(work treesit-language-source-alist)
(processors-to-use (max 1 (1- (num-processors)))))
(while work
(let ((specs (seq-take work processors-to-use)))
(dolist (spec specs)
(async-start
`(lambda ()
,(async-inject-variables "\\`treesit-language-source-alist\\'")
(treesit-install-language-grammar ',(car spec)))
(lambda (_)
(setq count (1+ count))
(message "Done syncing Tree-Sitter grammar for `%s' [%d/%d]"
(car spec) count total))))
(setq work (seq-drop work processors-to-use))))))
(thread-last
(mapcar #'car treesit-language-source-alist)
(seq-remove #'treesit-language-available-p)
(mapc #'treesit-install-language-grammar))
^L
;;; Install Additional TS Modes
(use-package gsp-ts-mode
:vc (:url "https://git.thomasvoss.com/gsp-ts-mode"
:branch "master"
:rev :newest
:vc-backend Git)
:ensure t)
;; NOTE: This package doesn’t autoload its ‘auto-mode-alist’ entries
(use-package vimscript-ts-mode
:ensure t
:mode (rx (or (seq (? (or ?. ?_)) (? ?g) "vimrc")
".vim"
".exrc")
eos))
;; NOTE: This package doesn’t autoload its ‘auto-mode-alist’ entries
(use-package vue-ts-mode
:vc (:url "https://github.com/8uff3r/vue-ts-mode.git"
:branch "main"
:rev :newest
:vc-backend Git)
:ensure t
:mode "\\.vue\\'")
^L
;;; Prefer Tree-Sitter Modes
;; NOTE: ‘go-ts-mode’ already adds itself to ‘auto-mode-alist’ but it
;; isn’t autoloaded as of 2024-09-29 so we need to do it ourselves
;; anyway. Same goes for ‘typescript-ts-mode’.
(defvar mm-treesit-language-file-name-alist
'((go . "\\.go\\'")
(go-mod . "/go\\.mod\\'")
(typescript . "\\.ts\\'"))
"Alist mapping languages to their associated file-names.
This alist is a set of pairs of the form (LANG . REGEXP) where LANG is
the symbol corresponding to a major mode with the ‘-ts-mode’ suffix
removed. REGEXP is a regular expression matching filenames for which
the associated language’s major-mode should be enabled.
This alist is used to configure `auto-mode-alist'.")
(dolist (spec treesit-language-source-alist)
(let* ((lang (car spec))
(lang (alist-get lang mm-treesit-language-remap-alist lang))
(symbol-name (symbol-name lang))
(name-mode (intern (concat symbol-name "-mode")))
(name-ts-mode (intern (concat symbol-name "-ts-mode"))))
;; If ‘name-ts-mode’ is already in ‘auto-mode-alist’ then we don’t
;; need to do anything, however if that’s not the case then if
;; ‘name-ts-mode’ and ‘name-mode’ are both bound we do a simple
;; remap. If the above is not true then we lookup the extensions in
;; ‘mm-treesit-language-file-name-alist’.
(cond
((not (fboundp name-ts-mode))
(warn "`%s' is missing." name-ts-mode))
((rassq name-ts-mode auto-mode-alist)
nil)
((fboundp name-mode)
(add-to-list 'major-mode-remap-alist (cons name-mode name-ts-mode)))
(t ; (and (fboundp name-ts-mode) (not (fboundp name-mode)))
(if-let ((file-regexp
(alist-get lang mm-treesit-language-file-name-alist)))
(add-to-list 'auto-mode-alist (cons file-regexp name-ts-mode))
(warn "Unable to determine the extension for `%s'." name-ts-mode))))))
^L
;;; Hack For C23
(advice-add #'c-ts-mode--keywords :filter-return
(defun mm-c-ts-mode-add-constexpr (keywords)
;; NOTE: We can’t add ‘typeof’ until it’s added to the TS grammar
;; https://github.com/tree-sitter/tree-sitter-c/issues/236
(append keywords '("constexpr"))))
^L
;;; Highlight Predefined Variables
(with-eval-after-load 'treesit
(defvar mm-c-font-lock-rules
(treesit-font-lock-rules
:language 'c
:feature 'constant
:override t
`(((identifier) @font-lock-constant-face
(:match ,(rx bos (or "__func__" "__FUNCTION__") eos)
@font-lock-constant-face))))))
(add-hook 'c-ts-mode-hook
(defun mm-c-apply-font-lock-extras ()
(setq treesit-font-lock-settings
(append treesit-font-lock-settings mm-c-font-lock-rules))))
^L
;;; Region Expansion
(defun mm-expreg-expand (n)
"Expand to N syntactic units."
(interactive "p")
(dotimes (_ n)
(expreg-expand)))
(defun mm-expreg-expand-dwim ()
"Do-What-I-Mean `expreg-expand' to start with symbol or word.
If over a real symbol, mark that directly, else start with a word. Fall
back to regular `expreg-expand'."
(interactive)
(if (region-active-p)
(expreg-expand)
(let ((symbol (bounds-of-thing-at-point 'symbol)))
(cond
((equal (bounds-of-thing-at-point 'word) symbol)
(mm-expreg-expand 1))
(symbol
(mm-expreg-expand 2))
(:else
(expreg-expand))))))
(use-package expreg
:ensure t
:commands (mm-expreg-expand mm-expreg-expand-dwim)
:bind ("M-SPC" . mm-expreg-expand-dwim))
(provide 'mm-treesit)
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