78 lines
2.7 KiB
EmacsLisp
78 lines
2.7 KiB
EmacsLisp
;;; -*- lexical-binding: t -*-
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;;; ohai-javascript.el --- Everybody's favourite personal hell.
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;; Copyright (C) 2015 Bodil Stokke
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;; Author: Bodil Stokke <bodil@bodil.org>
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Code:
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(require 'ohai-package)
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(require 'ohai-lib)
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;; If npm is installed, add its local prefix to the executable
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;; search path, which helps Emacs find linters etc.
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;; This isn't Windows compatible, but then neither is npm, really.
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(-when-let (npm-prefix (ohai/exec-if-exec "npm" "config get prefix"))
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(setenv "PATH" (concat npm-prefix "/bin:" (getenv "PATH"))))
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;; Install js2-mode, which improves on Emacs's default JS mode
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;; tremendously.
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(package-require 'js2-mode)
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(add-to-list 'auto-mode-alist '("\\.js$" . js2-mode))
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(add-to-list 'auto-mode-alist '("\\.es6\\'" . js2-mode))
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(add-to-list 'auto-mode-alist '("\\.ejs\\'" . js2-mode))
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;; But for JSON files, it's better to stick with plain old js-mode.
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(add-to-list 'auto-mode-alist '("\\.json$" . js-mode))
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;; Configure js2-mode good.
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(setq-default
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js2-mode-indent-ignore-first-tab t
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js2-strict-inconsistent-return-warning nil
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js2-global-externs
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'("module" "require" "__dirname" "process" "console" "JSON" "$" "_"))
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;; js2-show-parse-errors nil
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;; js2-strict-var-hides-function-arg-warning nil
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;; js2-strict-missing-semi-warning nil
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;; js2-strict-trailing-comma-warning nil
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;; js2-strict-cond-assign-warning nil
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;; js2-strict-var-redeclaration-warning nil
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;; Use Tern for smarter JS.
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(package-require 'tern)
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(add-hook 'js2-mode-hook (lambda () (tern-mode t)))
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;; Locate the Tern binary by querying the system search path, which
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;; should now include the local npm prefix.
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(setq tern-command (list (or (ohai/resolve-exec "tern") "tern")))
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;; Setup Tern as an autocomplete source.
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(with-eval-after-load "company"
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(package-require 'company-tern)
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(require 'company-tern)
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(add-to-list 'company-backends 'company-tern))
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;; Leverage js2-mode to get some refactoring support through js2-refactor.
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(package-require 'js2-refactor)
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(add-hook 'js2-mode-hook
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(lambda ()
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(js2r-add-keybindings-with-prefix "C-c C-m")))
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(provide 'ohai-javascript)
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