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yarn-mode.el
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yarn-mode.el
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;;; yarn-mode.el --- Major mode for yarn.lock files.
;; Copyright (c) 2017 Nicolás Salas V.
;;
;; Author: Nicolás Salas V. <[email protected]>
;; URL: https://github.com/anachronic/yarn-mode
;; Keywords: convenience
;; Version: 1.0
;; Package-Requires: ((emacs "24.3"))
;; This file is not part of GNU Emacs.
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; yarn-mode is a major mode designed to be used to look at yarn.lock
;; files generated by Facebook's yarn package manager
;; To install, just (require 'yarn-mode)
;; yarn.lock files will be automatically be opened with yarn-mode and
;; will be in read-only mode
;; Visit the home page at https://github.com/anachronic/yarn-mode
;;; Code:
(defgroup yarn-mode nil
"Major mode for yarn.lock files"
:group 'convenience)
(defvar yarn-mode-syntax-table
nil
"Syntax table for `yarn-mode'.")
(defvar yarn-mode-attributes-re
nil
"Keywords of `yarn-mode'.")
(defvar yarn-mode-font-lock-defaults
nil
"List for font lock in `yarn-mode'.")
(defvar yarn-mode-package-re
nil
"Regular expression that defines a package.")
(defvar yarn-mode-dependencies-re
nil
"Regular expression that defines a package dependency.")
(setq yarn-mode-package-re "\\(^\\|,\\s-\\)\\([a-zA-Z-_0-9]+\\)@")
(setq yarn-mode-dependencies-re "\\s-\\{4,\\}\\([a-zA-Z-_0-9]+\\)\\s-")
(setq yarn-mode-attributes-re (regexp-opt '("version" "resolved" "dependencies" "integrity")))
(setq yarn-mode-font-lock-defaults
`((,yarn-mode-attributes-re . 'yarn-mode-keywords-face)
(,yarn-mode-package-re . (2 'yarn-mode-package-face t)) ;; Direct deps
(,yarn-mode-dependencies-re . (1 'yarn-mode-dependency-face t)) ;; Dep of another dep (nested)
))
(setq yarn-mode-syntax-table
(let ((syntable (make-syntax-table)))
(modify-syntax-entry ?# "<" syntable)
(modify-syntax-entry ?\n ">" syntable)
(modify-syntax-entry ?\" "\"" syntable)
syntable))
;; Custom faces
(defface yarn-mode-package-face
'((t :inherit bold))
"Font lock face for package names in yarn mode."
:group 'yarn-mode)
(defface yarn-mode-dependency-face
'((t :inherit bold))
"Font lock face for package nested dependencies in yarn mode."
:group 'yarn-mode)
(defface yarn-mode-keywords-face
'((t :inherit font-lock-builtin-face))
"Font lock face for yarn keywords."
:group 'yarn-mode)
;;;###autoload
(define-derived-mode yarn-mode text-mode "Yarn"
"Simple mode to highlight yarn.lock files."
:syntax-table yarn-mode-syntax-table
(setq font-lock-defaults '(yarn-mode-font-lock-defaults))
(setq buffer-read-only t))
;;;###autoload
(add-to-list 'auto-mode-alist '("yarn\\.lock\\'" . yarn-mode))
(provide 'yarn-mode)
;;; yarn-mode.el ends here