├── .github └── workflows │ └── ci.yml ├── .gitignore ├── LICENSE ├── README.md ├── images └── sample.png └── nushell-ts-mode.el /.github/workflows/ci.yml: -------------------------------------------------------------------------------- 1 | name: CI 2 | 3 | on: 4 | push: 5 | branches: 6 | - main 7 | paths-ignore: 8 | - '**.md' 9 | pull_request: 10 | branches: 11 | - main 12 | paths-ignore: 13 | - '**.md' 14 | 15 | jobs: 16 | test: 17 | runs-on: ubuntu-latest 18 | continue-on-error: ${{ matrix.emacs_version == 'snapshot' }} 19 | 20 | strategy: 21 | matrix: 22 | emacs_version: 23 | - 29.1 24 | - snapshot 25 | 26 | steps: 27 | - uses: actions/checkout@v3 28 | 29 | - name: Install build tools 30 | run: | 31 | sudo apt-get install build-essential -y 32 | 33 | - name: Setup emacs 34 | uses: purcell/setup-emacs@master 35 | with: 36 | version: ${{ matrix.emacs_version }} 37 | 38 | - name: Install Eldev 39 | uses: emacs-eldev/setup-eldev@v1 40 | 41 | - name: Install nushell language grammar 42 | run: | 43 | eldev -dtT -C eval -R " 44 | (progn 45 | (require 'treesit) 46 | (add-to-list 'treesit-language-source-alist 47 | '(nu \"https://github.com/nushell/tree-sitter-nu\")) 48 | (treesit-install-language-grammar 'nu)) 49 | " 50 | - name: Test the project 51 | run: | 52 | eldev -p -dtT -C test 53 | 54 | - name: Ensure there are no byte-compilation warnings 55 | run: | 56 | eldev -dtT -C compile --set all --warnings-as-errors 57 | 58 | - name: Lint the project 59 | run: | 60 | eldev -p -dtT -C lint 61 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Compiled 2 | *.elc 3 | 4 | # Packaging 5 | .cask 6 | 7 | # Backup files 8 | *~ 9 | 10 | # Undo-tree save-files 11 | *.~undo-tree 12 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Nushell Tree-Sitter mode 2 | 3 | [![GNU Emacs](https://img.shields.io/static/v1?logo=gnuemacs&logoColor=fafafa&label=Made%20for&message=GNU%20Emacs&color=7F5AB6)](https://www.gnu.org/software/emacs/) 4 | [![MELPA](https://melpa.org/packages/nushell-ts-mode-badge.svg)](https://melpa.org/#/nushell-ts-mode) 5 | [![License GPL 3](https://img.shields.io/badge/license-GPL_3-green.svg)](http://www.gnu.org/licenses/gpl-3.0.txt) 6 | [![Build Status](https://img.shields.io/github/actions/workflow/status/herbertjones/nushell-ts-mode/ci.yml)](https://github.com/herbertjones/nushell-ts-mode/actions/workflows/ci.yml?query=branch%3Amain) 7 | 8 | A mode for Nushell that uses tree-sitter. (treesit introduced in Emacs 29) 9 | 10 | * https://www.nushell.sh/ 11 | * https://github.com/nushell/tree-sitter-nu 12 | * https://tree-sitter.github.io/tree-sitter/ 13 | 14 | ![example highlighting](images/sample.png) 15 | 16 | As of 2023-09-08 [nushell-ts-babel](https://github.com/herbertjones/nushell-ts-babel) moved to separate repository. 17 | 18 | 19 | ## Features 20 | 21 | * Syntax highlighting 22 | * Indentation 23 | * Completion 24 | * Using completion-at-point-functions 25 | * Using known keywords 26 | * Simple variable completion using tree-sitter variable query 27 | * Org babel integration 28 | * Highlighting 29 | * Execute source code blocks 30 | 31 | 32 | ## Installation 33 | 34 | ### Build tree-sitter-nu 35 | 36 | 1. Run `treesit-install-language-grammar` 37 | 2. Select "nu" 38 | 3. Use URL https://github.com/nushell/tree-sitter-nu 39 | 4. Pick "src" 40 | 41 | 42 | ### Install package 43 | 44 | You will need to clone the repo and load it manually or use whatever package manager you use. 45 | 46 | ```emacs-lisp 47 | (straight-use-package 48 | '(nushell-ts-mode :type git :host github :repo "herbertjones/nushell-ts-mode")) 49 | ``` 50 | 51 | For instance, on my system I have: 52 | ```emacs-lisp 53 | (use-package nushell-ts-mode 54 | :straight (nushell-ts-mode :type git :host github :repo "herbertjones/nushell-ts-mode") 55 | :config 56 | (require 'nushell-ts-babel) 57 | (defun hfj/nushell/mode-hook () 58 | (corfu-mode 1) 59 | (highlight-parentheses-mode 1) 60 | (electric-pair-local-mode 1) 61 | (electric-indent-local-mode 1)) 62 | (add-hook 'nushell-ts-mode-hook 'hfj/nushell/mode-hook)) 63 | ``` 64 | -------------------------------------------------------------------------------- /images/sample.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/herbertjones/nushell-ts-mode/e07ecc59762fab8d5fa35bc6d3f522f74e580a2f/images/sample.png -------------------------------------------------------------------------------- /nushell-ts-mode.el: -------------------------------------------------------------------------------- 1 | ;;; nushell-ts-mode.el --- Tree-sitter support for Nushell -*- lexical-binding: t; -*- 2 | 3 | ;; Copyright (C) 2023 Herbert Jones 4 | 5 | ;; Author : Herbert Jones 6 | ;; Maintainer : Herbert Jones 7 | ;; Created : August 2023 8 | ;; Homepage : https://github.com/herbertjones/nushell-ts-mode 9 | ;; Keywords : nu nushell languages tree-sitter 10 | 11 | ;; Package-Version: 0.0.1 12 | ;; Package-Requires: ((emacs "29.1")) 13 | 14 | ;; SPDX-License-Identifier: GPL-3.0-or-later 15 | 16 | ;; This program is free software; you can redistribute it and/or modify 17 | ;; it under the terms of the GNU General Public License as published by 18 | ;; the Free Software Foundation, either version 3 of the License, or 19 | ;; (at your option) any later version. 20 | 21 | ;; This program is distributed in the hope that it will be useful, 22 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of 23 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 24 | ;; GNU General Public License for more details. 25 | 26 | ;; You should have received a copy of the GNU General Public License 27 | ;; along with this program. If not, see . 28 | 29 | ;;; Commentary: 30 | ;; 31 | ;; A mode for Nushell that uses tree-sitter. (treesit introduced in Emacs 29) 32 | 33 | ;;; Code: 34 | 35 | (require 'treesit) 36 | 37 | (declare-function treesit-font-lock-rules "treesit.c") 38 | (declare-function treesit-major-mode-setup "treesit.c") 39 | (declare-function treesit-node-child-by-field-name "treesit.c") 40 | (declare-function treesit-node-child "treesit.c") 41 | (declare-function treesit-node-text "treesit.c") 42 | (declare-function treesit-node-type "treesit.c") 43 | (declare-function treesit-parser-create "treesit.c") 44 | (declare-function treesit-ready-p "treesit.c") 45 | 46 | (defcustom nushell-ts-mode-indent-offset 2 47 | "Number of spaces for each indentation step in `nushell-ts-mode'." 48 | :version "29.1" 49 | :type 'integer 50 | :safe 'integerp 51 | :group 'nushell) 52 | 53 | (defvar nushell-ts-mode--operators 54 | '("+" ; add 55 | "-" ; subtract 56 | "*" ; multiply 57 | "/" ; divide 58 | "//" ; floor division 59 | "mod" ; modulo 60 | "**" ; exponentiation (power) 61 | "==" ; equal 62 | "!=" ; not equal 63 | "<" ; less than 64 | "<=" ; less than or equal 65 | ">" ; greater than 66 | ">=" ; greater than or equal 67 | "=~" ; regex match / string contains another 68 | "!~" ; inverse regex match / string does not contain another 69 | "in" ; value in list 70 | "not-in" ; value not in list 71 | "not" ; logical not 72 | "and" ; and two Boolean expressions (short-circuits) 73 | "or" ; or two Boolean expressions (short-circuits) 74 | "xor" ; exclusive or two boolean expressions 75 | "bit-or" ; bitwise or 76 | "bit-xor" ; bitwise xor 77 | "bit-and" ; bitwise and 78 | "bit-shl" ; bitwise shift left 79 | "bit-shr" ; bitwise shift right 80 | "starts-with" ; string starts with 81 | "ends-with" ; string ends with 82 | "++") ; append lists 83 | "Nushell operators for tree-sitter font-locking.") 84 | 85 | (defvar nushell-ts-mode--keywords 86 | '("alias" 87 | "def" 88 | "let" 89 | "mut" 90 | "source")) 91 | 92 | (defvar nushell-ts-mode--types 93 | '("any" 94 | "block" 95 | "bool" 96 | "cell-path" 97 | "cond" 98 | "duration" 99 | "error" 100 | "expr" 101 | "filesize" 102 | "glob" 103 | "int" 104 | "list" 105 | "math" 106 | "number" 107 | "operator" 108 | "path" 109 | "range" 110 | "record" 111 | "signature" 112 | "string" 113 | "table" 114 | "variable")) 115 | 116 | (defvar nushell-ts-mode--prettify-symbols-alist 117 | '((">=" . ?≥) 118 | ("<=" . ?≤) 119 | ("!=" . ?≠) 120 | ("->" . ?→) 121 | ("=>" . ?⇒) 122 | ("inf" . ?∞)) 123 | "Alist of symbol prettifications used for `prettify-symbols-alist'.") 124 | 125 | (defun nushell-ts-mode--get-variable-names () 126 | "Get a list of variable names that are near point." 127 | (interactive) 128 | ;; Ensuring the treesitter is ready and a root node exists, else throw an 129 | ;; error 130 | (unless (and (treesit-ready-p 'nu) (treesit-buffer-root-node)) 131 | (error "No treesitter node")) 132 | 133 | (let ((node (treesit-node-at (point))) 134 | (variable-names (list)) 135 | function-node) 136 | ;; If there is no node at the current point, throw an error 137 | (unless node 138 | (error "No treesitter node")) 139 | 140 | ;; Looping through the tree from the current node upwards to find a function 141 | ;; node 142 | (cl-loop for examine-node = node then (treesit-node-parent examine-node) 143 | while examine-node 144 | do (let ((node-type (treesit-node-type examine-node))) 145 | (cond ((equal node-type "decl_def") 146 | (setq function-node examine-node))))) 147 | 148 | ;; When a function node is found, query and capture all variable names 149 | ;; within its scope 150 | (when function-node 151 | (dolist (pair (treesit-query-capture function-node '((stmt_let (identifier) @name)))) 152 | (push (concat "$" (treesit-node-text (cdr pair) t)) 153 | variable-names))) 154 | 155 | ;; Return the list of variable names 156 | variable-names)) 157 | 158 | ;;;###autoload 159 | (defun nushell-ts-completions-at-point () 160 | "Completion function for Nushell. 161 | Provides completion suggestions at the current point." 162 | (let* ((bnds (bounds-of-thing-at-point 'symbol)) 163 | (start (car bnds)) 164 | (end (cdr bnds))) 165 | ;; Return a list containing: 166 | ;; - the start and end positions of the symbol at the point 167 | ;; - a merged list of completion suggestions, including operators, keywords, types, 168 | ;; and nearby variable names (if any are retrieved without errors) 169 | ;; - an :exclusive 'no' keyword argument indicating that other completion sources 170 | ;; can contribute suggestions as well 171 | (list start end 172 | (append nushell-ts-mode--operators nushell-ts-mode--keywords nushell-ts-mode--types 173 | (ignore-errors (nushell-ts-mode--get-variable-names))) 174 | :exclusive 'no))) 175 | 176 | (defvar nushell-ts-mode--indent-rules 177 | `((nu 178 | ;; If the current node is any closing bracket, the indentation should be at 179 | ;; the beginning of the line 180 | ((node-is ")") parent-bol 0) 181 | ((node-is "]") parent-bol 0) 182 | ((node-is "}") parent-bol 0) 183 | 184 | ;; For nodes within a block, the indentation should be at the beginning of 185 | ;; the line plus the offset value defined in 186 | ;; 'nushell-ts-mode-indent-offset' 187 | ((parent-is "block") parent-bol nushell-ts-mode-indent-offset) 188 | 189 | ;; Similar to blocks, for nodes within a string, the indentation should be 190 | ;; at the beginning of the line plus the offset value 191 | ((parent-is "string") parent-bol nushell-ts-mode-indent-offset) 192 | 193 | ;; Define indentation rules for array elements 194 | ((parent-is "array") parent-bol nushell-ts-mode-indent-offset) 195 | 196 | ;; Define indentation rules for list values 197 | ((parent-is "val_list") parent-bol nushell-ts-mode-indent-offset) 198 | 199 | ;; Define indentation rules for expressions enclosed in parentheses 200 | ((parent-is "expr_parenthesized") parent-bol nushell-ts-mode-indent-offset) 201 | 202 | ;; Define indentation rules for parameters enclosed in brackets 203 | ((parent-is "parameter_bracks") parent-bol nushell-ts-mode-indent-offset) 204 | 205 | ;; If there is no node, the indentation should be at the beginning of the 206 | ;; line 207 | (no-node parent-bol 0)))) 208 | 209 | (defun nushell-ts-mode--defun-name (node) 210 | "Return the defun name of NODE. 211 | Return nil if there is no name or if NODE is not a defun node." 212 | (pcase (treesit-node-type node) 213 | ("stmt_let" 214 | (treesit-node-text 215 | (treesit-node-child node 1) t)) 216 | ("assignment" 217 | (treesit-node-text 218 | (treesit-node-child-by-field-name node "lhs") t)) 219 | ("decl_def" 220 | (treesit-node-text 221 | (treesit-node-child-by-field-name node "name") t)))) 222 | 223 | (defvar nushell-ts-mode--font-lock-settings 224 | (treesit-font-lock-rules 225 | :language 'nu 226 | :feature 'property 227 | '((record_entry (identifier) @font-lock-property-name-face)) 228 | 229 | :language 'nu 230 | :feature 'comment 231 | '([(comment) (shebang)] @font-lock-comment-face) 232 | 233 | :language 'nu 234 | :feature 'bracket 235 | '((["(" ")" "[" "]" "{" "}"]) @font-lock-bracket-face) 236 | 237 | :language 'nu 238 | :feature 'definition 239 | '((stmt_let (identifier) @font-lock-variable-name-face) 240 | (assignment (val_variable) @font-lock-variable-name-face) 241 | (decl_def (cmd_identifier) @font-lock-function-name-face) 242 | (parameter (identifier) @font-lock-variable-name-face)) 243 | 244 | :language 'nu 245 | :feature 'function 246 | '((command (cmd_identifier) @font-lock-function-call-face) 247 | (decl_alias (cmd_identifier) @font-lock-function-call-face)) 248 | 249 | :language 'nu 250 | :feature 'keyword 251 | `([,@nushell-ts-mode--keywords] @font-lock-keyword-face) 252 | 253 | :language 'nu 254 | :feature 'number 255 | '((val_number) 256 | @font-lock-number-face) 257 | 258 | :language 'nu 259 | :feature 'operator 260 | `([,@nushell-ts-mode--operators] @font-lock-operator-face) 261 | 262 | :language 'nu 263 | :feature 'string 264 | '((val_string) @font-lock-string-face) 265 | 266 | :language 'nu 267 | :feature 'types 268 | `([,@nushell-ts-mode--types] @font-lock-type-face) 269 | 270 | :language 'nu 271 | :feature 'variable 272 | '((val_variable) @font-lock-variable-use-face) 273 | 274 | :language 'nu 275 | :feature 'error 276 | :override t 277 | '((ERROR) @font-lock-warning-face)) 278 | "Font-lock settings for Nushell.") 279 | 280 | (defvar nushell-ts-mode--syntax-table 281 | (let ((synTable (make-syntax-table))) 282 | ;; The '#' character starts a comment 283 | (modify-syntax-entry ?# "<" synTable) 284 | ;; The newline character ('\n') ends a comment 285 | (modify-syntax-entry ?\n ">#" synTable) 286 | synTable) 287 | "Syntax table for `nushell-ts-mode'.") 288 | 289 | ;;;###autoload 290 | (define-derived-mode nushell-ts-mode prog-mode "NuShell" 291 | "Major mode for editing NuShell scripts." 292 | :group 'nushell 293 | :syntax-table nushell-ts-mode--syntax-table 294 | ;; Ensure the treesitter parser for 'nu' is ready before setting up the major 295 | ;; mode 296 | (when (treesit-ready-p 'nu) 297 | (treesit-parser-create 'nu) 298 | 299 | ;; Setting up comment syntax, '#' is used to start a comment and it doesn't 300 | ;; require an end symbol 301 | (setq-local comment-start "#") 302 | (setq-local comment-end "") 303 | 304 | ;; Indent. 305 | ;; Configure the indentation rules using a predefined set of rules stored in 306 | ;; 'nushell-ts-mode--indent-rules' 307 | (setq-local treesit-simple-indent-rules nushell-ts-mode--indent-rules) 308 | 309 | ;; A regexp that matches the node type of defun nodes. For example, 310 | ;; "(function|class)_definition". 311 | (setq-local treesit-defun-type-regexp 312 | (regexp-opt '("decl_def" 313 | "stmt_let" 314 | "assignment"))) 315 | (setq-local treesit-defun-name-function #'nushell-ts-mode--defun-name) 316 | 317 | ;; Setting up font-lock (syntax highlighting) settings using predefined 318 | ;; settings and feature list 319 | (setq-local treesit-font-lock-settings nushell-ts-mode--font-lock-settings) 320 | (setq-local treesit-font-lock-feature-list 321 | '(( comment definition) 322 | ( error keyword string types) 323 | ( function number operator property variable) 324 | ( bracket ))) 325 | 326 | ;; Setup for Imenu, defining what tree-sitter nodes should appear in the 327 | ;; Imenu index 328 | (setq-local treesit-simple-imenu-settings 329 | `(("Variable" "\\`stmt_let\\'" nil nil) 330 | ("Variable" "\\`assignment\\'" nil nil) 331 | ("Function" "\\`decl_def\\'" nil nil))) 332 | 333 | ;; Prettify symbols settings, to replace certain symbols with more visually 334 | ;; appealing ones 335 | (setq-local prettify-symbols-alist nushell-ts-mode--prettify-symbols-alist) 336 | 337 | ;; Setting up electric indent characters and rules for automatic indentation 338 | (setq-local electric-indent-chars 339 | (append "{}()[]" electric-indent-chars)) 340 | (setq-local electric-layout-rules 341 | '((?\; . after) (?\{ . after) (?\} . before))) 342 | 343 | ;; Adding a hook to enable completion at point functionality in the major 344 | ;; mode 345 | (add-hook 'completion-at-point-functions #'nushell-ts-completions-at-point nil t) 346 | 347 | ;; Final setup for the major mode using tree-sitter 348 | (treesit-major-mode-setup))) 349 | 350 | (when (treesit-ready-p 'nu) 351 | (add-to-list 'auto-mode-alist '("\\.nu\\'" . nushell-ts-mode)) 352 | (add-to-list 'interpreter-mode-alist '("nu" . nushell-ts-mode))) 353 | 354 | (provide 'nushell-ts-mode) 355 | 356 | ;;; nushell-ts-mode.el ends here 357 | --------------------------------------------------------------------------------