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lsp-flycheck.el
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lsp-flycheck.el
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;;; lsp-flycheck.el --- Flycheck support for lsp-mode -*- lexical-binding: t; -*-
;; Copyright (C) 2017 fmdkdd
;; 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:
;; Put this in your config file:
;;
;; (with-eval-after-load 'lsp-mode
;; (require 'lsp-flycheck))
;;; Code:
(require 'lsp-notifications)
(require 'lsp-mode)
(require 'flycheck)
(require 'pcase)
(defun lsp--flycheck-start (checker callback)
"Start an LSP syntax check with CHECKER.
CALLBACK is the status callback passed by Flycheck."
;; Turn all errors from lsp--diagnostics into flycheck-error objects and pass
;; them immediately to the callback
(let ((errors))
(maphash (lambda (file diagnostics)
(dolist (diag diagnostics)
(push (flycheck-error-new
:buffer (current-buffer)
:checker checker
:filename file
:line (1+ (lsp-diagnostic-line diag))
:column (1+ (lsp-diagnostic-column diag))
:message (lsp-diagnostic-message diag)
:level (pcase (lsp-diagnostic-severity diag)
(1 'error)
(2 'warning)
(_ 'info))
:id (lsp-diagnostic-code diag))
errors)))
lsp--diagnostics)
(funcall callback 'finished errors)))
(flycheck-define-generic-checker 'lsp
"A syntax checker using the Language Server Protocol (RLS)
provided by lsp-mode.
See https://github.com/emacs-lsp/lsp-mode."
:start #'lsp--flycheck-start
:modes '(rust-mode go-mode python-mode haskell-mode) ; Need a default mode
:predicate (lambda () lsp-mode)
:error-explainer #'lsp-error-explainer)
(defun lsp-flycheck-add-mode (mode)
"Add MODE as a valid major-mode for the lsp checker."
(unless (flycheck-checker-supports-major-mode-p 'lsp mode)
(flycheck-add-mode 'lsp mode)))
(provide 'lsp-flycheck)
;;; lsp-flycheck ends here