[emacs] Cleanup related to lexical binding

.emacs.d/custom.el

@@ -1,3 +1,4 @@
+;; -*- lexical-binding: t; -*-
 (custom-set-variables
  ;; custom-set-variables was added by Custom.
  ;; If you edit it by hand, you could mess it up, so be careful.

.emacs.d/init.el

@@ -1,4 +1,4 @@
-;;; init.el -- Summary
+;;; init.el -- Summary  -*- lexical-binding: t; -*-
 ;;; Emacs initialization file
 ;;; john@d0ty.me
 ;;;

.emacs.d/opam-user-setup.el

@@ -1,4 +1,4 @@
-;; ## added by OPAM user-setup for emacs / base ## 2cfdcafda6d58f1dfe93a46e434ff502 ## you can edit, but keep this line
+;; ## added by OPAM user-setup for emacs / base ## 2cfdcafda6d58f1dfe93a46e434ff502 ## you can edit, but keep this line  -*- lexical-binding: t; -*-
 (provide 'opam-user-setup)
 
 ;; Base configuration for OPAM

site-lisp/flycheck-elm.el

@@ -1,165 +0,0 @@
-;;; flycheck-elm.el --- Flycheck support for the elm language
-
-;; Copyright (c) 2015 Brian Sermons
-
-;; Author: Brian Sermons
-;; Package-Requires: ((flycheck "0.29-cvs") (emacs "24.4"))
-;; URL: https://github.com/bsermons/flycheck-elm
-
-;; This file is not part of GNU Emacs.
-
-;; This file 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, or (at your option)
-;; any later version.
-
-;; This file 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:
-
-;; Enable this checker automatically by adding code like the following
-;; to your startup files:
-
-;;     (eval-after-load 'flycheck
-;;       '(flycheck-elm-setup))
-
-;;; Code:
-
-(require 'cl-lib)
-(require 'json)
-(require 'flycheck)
-
-(defgroup flycheck-elm nil
-  "Elm support for Flycheck."
-  :prefix "flycheck-elm-"
-  :group 'flycheck
-  :link '(url-link :tag "Github" "https://github.com/bsermons/flycheck-elm"))
-
-(defcustom flycheck-elm-reporting-mode 'all
-  "*Types of messages to show."
-  :type '(choice
-          (const :tag "Show warnings and errors." all)
-          (const :tag "Show only errors." errors-only)
-          (const :tag "Show warnings only if no errors occur." warn-after-errors))
-  :group 'flycheck-elm)
-
-(defun flycheck-elm-decode-elm-error (error checker buffer)
-  (let* ((region (assoc 'region error))
-         (tag (concat "[" (cdr (assoc 'tag error)) "]"))
-         (overview (cdr (assoc 'overview error)))
-         (details (cdr (assoc 'details error)))
-         (start (assoc 'start region))
-         (start-col (cdr (assoc 'column start)))
-         (start-line (cdr (assoc 'line start))))
-    (flycheck-error-new
-     :checker checker
-     :buffer buffer
-     :filename (cdr (assoc 'file error))
-     :line start-line
-     :column start-col
-     :message (mapconcat 'identity (list tag overview details) "\n")
-     :level (flycheck-elm-decode-type error))))
-
-(defun flycheck-elm-decode-type (error)
-  (let ((type (cdr (assoc 'type error))))
-    (pcase type
-      (`"warning" 'warning)
-      (`"error" 'error)
-      (_ 'unknown))))
-
-(defun flycheck-elm-read-json (str)
-  (condition-case nil
-      (json-read-from-string str)
-    (error nil)))
-
-(defun flycheck-elm-parse-error-data (data)
-  (let* ((json-array-type 'list)
-         (mapdata (mapcar
-                   'flycheck-elm-read-json
-                   (split-string data "\n"))))
-    (append (car mapdata) (car (cdr mapdata)))))
-
-(defun flycheck-elm-parse-errors (output checker buffer)
-  "Decode elm json output errors."
-  (let* ((data (flycheck-elm-parse-error-data output))
-         (errors (flycheck-elm-filter-by-preference data)))
-    (mapcar
-     (lambda (x) (flycheck-elm-decode-elm-error x checker buffer))
-     errors)))
-
-(defun flycheck-elm-filter-by-preference (lst &optional pref)
-  "Filter the lst by user preference."
-  (let ((errors (flycheck-elm-filter-by-type 'error lst)))
-    (or pref (set 'pref flycheck-elm-reporting-mode))
-    (pcase pref
-      (`errors-only errors)
-      (`warn-after-errors
-       (pcase (length errors)
-         (0 (flycheck-elm-filter-by-type 'warning lst))
-         (_ errors)))
-      (_  lst))))
-
-(defun flycheck-elm-filter-by-type (type lst)
-  "Return a new LIST of errors of type TYPE."
-  (cl-remove-if-not
-   (lambda (x)(equal (flycheck-elm-decode-type x) type))
-   lst))
-
-(defun flycheck-elm-package-json-directory (&optional checker)
-  "Find the directory in which CHECKER should run \"elm-make\"."
-  (locate-dominating-file default-directory "elm-package.json"))
-
-(flycheck-def-option-var flycheck-elm-output-file nil elm
-  "The output file to compile to when performing syntax checking.
-
-The value of this variable is either nil, or a string with the
-path to the desired compilation output file.
-
-If nil, flycheck-elm will compile to `/dev/null' so as to not
-interfere with your project files. Elm-make has special logic
-to handle /dev/null, hence the use of /dev/null instead of `null-device' even
-on Windows.
-See commit: https://github.com/elm-lang/elm-make/commit/ddcd4980fac9127c91c1de373c310155de9fa558
-
-If a string is provided, the flycheck-elm will compile your code
-to the given file each time it performs syntax checking. This can
-be set to any file with a .js or .html extension. Please note
-that the contents of this file will be overwritten every time
-flycheck-elm successfully compiles your Elm code."
-  :type '(string))
-
-
-(flycheck-def-option-var flycheck-elm-main-file nil elm
-  "A main elm file for flycheck-elm to compile instead of individual files.
-
-The value of this variable is either nil, in which case
-flycheck-elm will compile individual files when checking them, or
-a string with the path to the main elm file within your
-project. The main elm file is the .elm file which contains a
-\"main\" function, for example: \"Main.elm\")."
-  :type '(string))
-
-(flycheck-define-checker elm
-  "A syntax checker for elm-mode using the json output from elm-make"
-  :command ("elm-make" "--report=json"
-            (eval (or flycheck-elm-main-file buffer-file-name))
-            (eval (concat  "--output=" (or flycheck-elm-output-file "/dev/null"))))
-  :error-parser flycheck-elm-parse-errors
-  :working-directory flycheck-elm-package-json-directory
-  :predicate flycheck-elm-package-json-directory
-  :modes elm-mode)
-
-;;;###autoload
-(defun flycheck-elm-setup ()
-  "Setup Flycheck elm."
-  (interactive)
-  (add-to-list 'flycheck-checkers 'elm))
-
-(provide 'flycheck-elm)
-;;; flycheck-elm.el ends here