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1 files changed, 822 insertions, 0 deletions

diff --git a/configs/shared/emacs/.emacs.d/elpa/with-editor-20180618.1602/with-editor.el b/configs/shared/emacs/.emacs.d/elpa/with-editor-20180618.1602/with-editor.el
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+;;; with-editor.el --- Use the Emacsclient as $EDITOR -*- lexical-binding: t -*-
+
+;; Copyright (C) 2014-2018  The Magit Project Contributors
+;;
+;; You should have received a copy of the AUTHORS.md file.  If not,
+;; see https://github.com/magit/with-editor/blob/master/AUTHORS.md.
+
+;; Author: Jonas Bernoulli <jonas@bernoul.li>
+;; Maintainer: Jonas Bernoulli <jonas@bernoul.li>
+
+;; Package-Requires: ((emacs "24.4") (async "1.9"))
+;; Keywords: tools
+;; Homepage: https://github.com/magit/with-editor
+
+;; This file is not part of GNU Emacs.
+
+;; This file is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with Magit.  If not, see http://www.gnu.org/licenses.
+
+;;; Commentary:
+
+;; This library makes it possible to reliably use the Emacsclient as
+;; the `$EDITOR' of child processes.  It makes sure that they know how
+;; to call home.  For remote processes a substitute is provided, which
+;; communicates with Emacs on standard output/input instead of using a
+;; socket as the Emacsclient does.
+
+;; It provides the commands `with-editor-async-shell-command' and
+;; `with-editor-shell-command', which are intended as replacements
+;; for `async-shell-command' and `shell-command'.  They automatically
+;; export `$EDITOR' making sure the executed command uses the current
+;; Emacs instance as "the editor".  With a prefix argument these
+;; commands prompt for an alternative environment variable such as
+;; `$GIT_EDITOR'.  To always use these variants add this to your init
+;; file:
+;;
+;;   (define-key (current-global-map)
+;;     [remap async-shell-command] 'with-editor-async-shell-command)
+;;   (define-key (current-global-map)
+;;     [remap shell-command] 'with-editor-shell-command)
+
+;; Alternatively use the global `shell-command-with-editor-mode',
+;; which always sets `$EDITOR' for all Emacs commands which ultimately
+;; use `shell-command' to asynchronously run some shell command.
+
+;; The command `with-editor-export-editor' exports `$EDITOR' or
+;; another such environment variable in `shell-mode', `term-mode' and
+;; `eshell-mode' buffers.  Use this Emacs command before executing a
+;; shell command which needs the editor set, or always arrange for the
+;; current Emacs instance to be used as editor by adding it to the
+;; appropriate mode hooks:
+;;
+;;   (add-hook 'shell-mode-hook  'with-editor-export-editor)
+;;   (add-hook 'term-exec-hook   'with-editor-export-editor)
+;;   (add-hook 'eshell-mode-hook 'with-editor-export-editor)
+
+;; Some variants of this function exist, these two forms are
+;; equivalent:
+;;
+;;   (add-hook 'shell-mode-hook
+;;             (apply-partially 'with-editor-export-editor "GIT_EDITOR"))
+;;   (add-hook 'shell-mode-hook 'with-editor-export-git-editor)
+
+;; This library can also be used by other packages which need to use
+;; the current Emacs instance as editor.  In fact this library was
+;; written for Magit and its `git-commit-mode' and `git-rebase-mode'.
+;; Consult `git-rebase.el' and the related code in `magit-sequence.el'
+;; for a simple example.
+
+;;; Code:
+
+(require 'cl-lib)
+;; `pcase-dolist' is not autoloaded on Emacs 24.
+(eval-when-compile (require 'pcase))
+(require 'server)
+(require 'shell)
+
+(and (require 'async-bytecomp nil t)
+     (memq 'magit (bound-and-true-p async-bytecomp-allowed-packages))
+     (fboundp 'async-bytecomp-package-mode)
+     (async-bytecomp-package-mode 1))
+
+(eval-when-compile
+  (progn (require 'dired nil t)
+         (require 'eshell nil t)
+         (require 'term nil t)
+         (require 'warnings nil t)))
+(declare-function dired-get-filename 'dired)
+(declare-function term-emulate-terminal 'term)
+(defvar eshell-preoutput-filter-functions)
+
+;;; Options
+
+(defgroup with-editor nil
+  "Use the Emacsclient as $EDITOR."
+  :group 'external
+  :group 'server)
+
+(defun with-editor-locate-emacsclient ()
+  "Search for a suitable Emacsclient executable."
+  (or (with-editor-locate-emacsclient-1
+       (with-editor-emacsclient-path)
+       (length (split-string emacs-version "\\.")))
+      (prog1 nil (display-warning 'with-editor "\
+Cannot determine a suitable Emacsclient
+
+Determining an Emacsclient executable suitable for the
+current Emacs instance failed.  For more information
+please see https://github.com/magit/magit/wiki/Emacsclient."))))
+
+(defun with-editor-locate-emacsclient-1 (path depth)
+  (let* ((version-lst (cl-subseq (split-string emacs-version "\\.") 0 depth))
+         (version-reg (concat "^" (mapconcat #'identity version-lst "\\."))))
+    (or (locate-file-internal
+         (if (equal (downcase invocation-name) "remacs")
+             "remacsclient"
+           "emacsclient")
+         path
+         (cl-mapcan
+          (lambda (v) (cl-mapcar (lambda (e) (concat v e)) exec-suffixes))
+          (nconc (and (boundp 'debian-emacs-flavor)
+                      (list (format ".%s" debian-emacs-flavor)))
+                 (cl-mapcon (lambda (v)
+                              (setq v (mapconcat #'identity (reverse v) "."))
+                              (list v (concat "-" v) (concat ".emacs" v)))
+                            (reverse version-lst))
+                 (list "" "-snapshot" ".emacs-snapshot")))
+         (lambda (exec)
+           (ignore-errors
+             (string-match-p version-reg
+                             (with-editor-emacsclient-version exec)))))
+        (and (> depth 1)
+             (with-editor-locate-emacsclient-1 path (1- depth))))))
+
+(defun with-editor-emacsclient-version (exec)
+  (let ((default-directory (file-name-directory exec)))
+    (ignore-errors
+      (cadr (split-string (car (process-lines exec "--version")))))))
+
+(defun with-editor-emacsclient-path ()
+  (let ((path exec-path))
+    (when invocation-directory
+      (push (directory-file-name invocation-directory) path)
+      (let* ((linkname (expand-file-name invocation-name invocation-directory))
+             (truename (file-chase-links linkname)))
+        (unless (equal truename linkname)
+          (push (directory-file-name (file-name-directory truename)) path)))
+      (when (eq system-type 'darwin)
+        (let ((dir (expand-file-name "bin" invocation-directory)))
+          (when (file-directory-p dir)
+            (push dir path)))
+        (when (string-match-p "Cellar" invocation-directory)
+          (let ((dir (expand-file-name "../../../bin" invocation-directory)))
+            (when (file-directory-p dir)
+              (push dir path))))))
+    (cl-remove-duplicates path :test 'equal)))
+
+(defcustom with-editor-emacsclient-executable (with-editor-locate-emacsclient)
+  "The Emacsclient executable used by the `with-editor' macro."
+  :group 'with-editor
+  :type '(choice (string :tag "Executable")
+                 (const  :tag "Don't use Emacsclient" nil)))
+
+(defcustom with-editor-sleeping-editor "\
+sh -c '\
+echo \"WITH-EDITOR: $$ OPEN $0\"; \
+sleep 604800 & sleep=$!; \
+trap \"kill $sleep; exit 0\" USR1; \
+trap \"kill $sleep; exit 1\" USR2; \
+wait $sleep'"
+  "The sleeping editor, used when the Emacsclient cannot be used.
+
+This fallback is used for asynchronous processes started inside
+the macro `with-editor', when the process runs on a remote machine
+or for local processes when `with-editor-emacsclient-executable'
+is nil (i.e. when no suitable Emacsclient was found, or the user
+decided not to use it).
+
+Where the latter uses a socket to communicate with Emacs' server,
+this substitute prints edit requests to its standard output on
+which a process filter listens for such requests.  As such it is
+not a complete substitute for a proper Emacsclient, it can only
+be used as $EDITOR of child process of the current Emacs instance.
+
+Some shells do not execute traps immediately when waiting for a
+child process, but by default we do use such a blocking child
+process.
+
+If you use such a shell (e.g. `csh' on FreeBSD, but not Debian),
+then you have to edit this option.  You can either replace \"sh\"
+with \"bash\" (and install that), or you can use the older, less
+performant implementation:
+
+  \"sh -c '\\
+  echo \\\"WITH-EDITOR: $$ OPEN $0\\\"; \\
+  trap \\\"exit 0\\\" USR1; \\
+  trap \\\"exit 1\" USR2; \\
+  while true; do sleep 1; done'\"
+
+Note that this leads to a delay of up to a second.  The delay can
+be shortened by replacing \"sleep 1\" with \"sleep 0.01\", or if your
+implementation does not support floats, then by using `nanosleep'
+instead."
+  :group 'with-editor
+  :type 'string)
+
+(defcustom with-editor-finish-query-functions nil
+  "List of functions called to query before finishing session.
+
+The buffer in question is current while the functions are called.
+If any of them returns nil, then the session is not finished and
+the buffer is not killed.  The user should then fix the issue and
+try again.  The functions are called with one argument.  If it is
+non-nil then that indicates that the user used a prefix argument
+to force finishing the session despite issues.  Functions should
+usually honor that and return non-nil."
+  :group 'with-editor
+  :type 'hook)
+(put 'with-editor-finish-query-functions 'permanent-local t)
+
+(defcustom with-editor-cancel-query-functions nil
+  "List of functions called to query before canceling session.
+
+The buffer in question is current while the functions are called.
+If any of them returns nil, then the session is not canceled and
+the buffer is not killed.  The user should then fix the issue and
+try again.  The functions are called with one argument.  If it is
+non-nil then that indicates that the user used a prefix argument
+to force canceling the session despite issues.  Functions should
+usually honor that and return non-nil."
+  :group 'with-editor
+  :type 'hook)
+(put 'with-editor-cancel-query-functions 'permanent-local t)
+
+(defcustom with-editor-mode-lighter " WE"
+  "The mode-line lighter of the With-Editor mode."
+  :group 'with-editor
+  :type '(choice (const :tag "No lighter" "") string))
+
+(defvar with-editor-server-window-alist nil
+  "Alist of filename patterns vs corresponding `server-window'.
+
+Each element looks like (REGEXP . FUNCTION).  Files matching
+REGEXP are selected using FUNCTION instead of the default in
+`server-window'.
+
+Note that when a package adds an entry here then it probably
+has a reason to disrespect `server-window' and it likely is
+not a good idea to change such entries.")
+
+(defvar with-editor-file-name-history-exclude nil
+  "List of regexps for filenames `server-visit' should not remember.
+When a filename matches any of the regexps, then `server-visit'
+does not add it to the variable `file-name-history', which is
+used when reading a filename in the minibuffer.")
+
+(defcustom with-editor-shell-command-use-emacsclient t
+  "Whether to use the emacsclient when running shell commands.
+
+This affects `with-editor-shell-command-async' and, if the input
+ends with \"&\" `with-editor-shell-command' .
+
+If `shell-command-with-editor-mode' is enabled, then it also
+affects `shell-command-async' and, if the input ends with \"&\"
+`shell-command'.
+
+This is a temporary kludge that lets you choose between two
+possible defects, the ones described in the issues #23 and #40.
+
+When t, then use the emacsclient.  This has the disadvantage that
+`with-editor-mode' won't be enabled because we don't know whether
+this package was involved at all in the call to the emacsclient,
+and when it is not, then we really should.  The problem is that
+the emacsclient doesn't pass a long any environment variables to
+the server.  This will hopefully be fixed in Emacs eventually.
+
+When nil, then use the sleeping editor.  Because in this case we
+know that this package is involved, we can enable the mode.  But
+this makes it necessary that you invoke $EDITOR in shell scripts
+like so:
+
+  eval \"$EDITOR\" file
+
+And some tools that do not handle $EDITOR properly also break."
+  :package-version '(with-editor . "2.8.0")
+  :group 'with-editor
+  :type 'boolean)
+
+;;; Mode Commands
+
+(defvar with-editor-pre-finish-hook nil)
+(defvar with-editor-pre-cancel-hook nil)
+(defvar with-editor-post-finish-hook nil)
+(defvar with-editor-post-finish-hook-1 nil)
+(defvar with-editor-post-cancel-hook nil)
+(defvar with-editor-post-cancel-hook-1 nil)
+(defvar with-editor-cancel-alist nil)
+(put 'with-editor-pre-finish-hook 'permanent-local t)
+(put 'with-editor-pre-cancel-hook 'permanent-local t)
+(put 'with-editor-post-finish-hook 'permanent-local t)
+(put 'with-editor-post-cancel-hook 'permanent-local t)
+
+(defvar with-editor-show-usage t)
+(defvar with-editor-cancel-message nil)
+(defvar with-editor-previous-winconf nil)
+(make-variable-buffer-local 'with-editor-show-usage)
+(make-variable-buffer-local 'with-editor-cancel-message)
+(make-variable-buffer-local 'with-editor-previous-winconf)
+(put 'with-editor-cancel-message 'permanent-local t)
+(put 'with-editor-previous-winconf 'permanent-local t)
+
+(defvar-local with-editor--pid nil "For internal use.")
+(put 'with-editor--pid 'permanent-local t)
+
+(defun with-editor-finish (force)
+  "Finish the current edit session."
+  (interactive "P")
+  (when (run-hook-with-args-until-failure
+         'with-editor-finish-query-functions force)
+    (let ((with-editor-post-finish-hook-1
+           (ignore-errors (delq t with-editor-post-finish-hook))))
+      (run-hooks 'with-editor-pre-finish-hook)
+      (with-editor-return nil)
+      (accept-process-output nil 0.1)
+      (run-hooks 'with-editor-post-finish-hook-1))))
+
+(defun with-editor-cancel (force)
+  "Cancel the current edit session."
+  (interactive "P")
+  (when (run-hook-with-args-until-failure
+         'with-editor-cancel-query-functions force)
+    (let ((message with-editor-cancel-message))
+      (when (functionp message)
+        (setq message (funcall message)))
+      (let ((with-editor-post-cancel-hook-1
+             (ignore-errors (delq t with-editor-post-cancel-hook)))
+            (with-editor-cancel-alist nil))
+        (run-hooks 'with-editor-pre-cancel-hook)
+        (with-editor-return t)
+        (accept-process-output nil 0.1)
+        (run-hooks 'with-editor-post-cancel-hook-1))
+      (message (or message "Canceled by user")))))
+
+(defun with-editor-return (cancel)
+  (let ((winconf with-editor-previous-winconf)
+        (clients server-buffer-clients)
+        (dir default-directory)
+        (pid with-editor--pid))
+    (remove-hook 'kill-buffer-query-functions
+                 'with-editor-kill-buffer-noop t)
+    (cond (cancel
+           (save-buffer)
+           (if clients
+               (dolist (client clients)
+                 (ignore-errors
+                   (server-send-string client "-error Canceled by user"))
+                 (delete-process client))
+             ;; Fallback for when emacs was used as $EDITOR
+             ;; instead of emacsclient or the sleeping editor.
+             ;; See https://github.com/magit/magit/issues/2258.
+             (ignore-errors (delete-file buffer-file-name))
+             (kill-buffer)))
+          (t
+           (save-buffer)
+           (if clients
+               ;; Don't use `server-edit' because we do not want to
+               ;; show another buffer belonging to another client.
+               ;; See https://github.com/magit/magit/issues/2197.
+               (server-done)
+             (kill-buffer))))
+    (when pid
+      (let ((default-directory dir))
+        (process-file "kill" nil nil nil
+                      "-s" (if cancel "USR2" "USR1") pid)))
+    (when (and winconf (eq (window-configuration-frame winconf)
+                           (selected-frame)))
+      (set-window-configuration winconf))))
+
+;;; Mode
+
+(defvar with-editor-mode-map
+  (let ((map (make-sparse-keymap)))
+    (define-key map "\C-c\C-c"                           'with-editor-finish)
+    (define-key map [remap server-edit]                  'with-editor-finish)
+    (define-key map [remap evil-save-and-close]          'with-editor-finish)
+    (define-key map [remap evil-save-modified-and-close] 'with-editor-finish)
+    (define-key map "\C-c\C-k"                           'with-editor-cancel)
+    (define-key map [remap kill-buffer]                  'with-editor-cancel)
+    (define-key map [remap ido-kill-buffer]              'with-editor-cancel)
+    (define-key map [remap iswitchb-kill-buffer]         'with-editor-cancel)
+    (define-key map [remap evil-quit]                    'with-editor-cancel)
+    map))
+
+(define-minor-mode with-editor-mode
+  "Edit a file as the $EDITOR of an external process."
+  :lighter with-editor-mode-lighter
+  ;; Protect the user from killing the buffer without using
+  ;; either `with-editor-finish' or `with-editor-cancel',
+  ;; and from removing the key bindings for these commands.
+  (unless with-editor-mode
+    (user-error "With-Editor mode cannot be turned off"))
+  (add-hook 'kill-buffer-query-functions
+            'with-editor-kill-buffer-noop nil t)
+  ;; `server-execute' displays a message which is not
+  ;; correct when using this mode.
+  (when with-editor-show-usage
+    (with-editor-usage-message)))
+
+(put 'with-editor-mode 'permanent-local t)
+
+(defun with-editor-kill-buffer-noop ()
+  (user-error (substitute-command-keys "\
+Don't kill this buffer.  Instead cancel using \\[with-editor-cancel]")))
+
+(defun with-editor-usage-message ()
+  ;; Run after `server-execute', which is run using
+  ;; a timer which starts immediately.
+  (run-with-timer
+   0.01 nil `(lambda ()
+               (with-current-buffer ,(current-buffer)
+                 (message (substitute-command-keys "\
+Type \\[with-editor-finish] to finish, \
+or \\[with-editor-cancel] to cancel"))))))
+
+;;; Wrappers
+
+(defvar with-editor--envvar nil "For internal use.")
+
+(defmacro with-editor (&rest body)
+  "Use the Emacsclient as $EDITOR while evaluating BODY.
+Modify the `process-environment' for processes started in BODY,
+instructing them to use the Emacsclient as $EDITOR.  If optional
+ENVVAR is provided then bind that environment variable instead.
+\n(fn [ENVVAR] BODY...)"
+  (declare (indent defun) (debug (body)))
+  `(let ((with-editor--envvar ,(if (stringp (car body))
+                                   (pop body)
+                                 '(or with-editor--envvar "EDITOR")))
+         (process-environment process-environment))
+     (with-editor--setup)
+     ,@body))
+
+(defun with-editor--setup ()
+  (if (or (not with-editor-emacsclient-executable)
+          (file-remote-p default-directory))
+      (push (concat with-editor--envvar "=" with-editor-sleeping-editor)
+            process-environment)
+    ;; Make sure server-use-tcp's value is valid.
+    (unless (featurep 'make-network-process '(:family local))
+      (setq server-use-tcp t))
+    ;; Make sure the server is running.
+    (unless (process-live-p server-process)
+      (when (server-running-p server-name)
+        (setq server-name (format "server%s" (emacs-pid)))
+        (when (server-running-p server-name)
+          (server-force-delete server-name)))
+      (server-start))
+    ;; Tell $EDITOR to use the Emacsclient.
+    (push (concat with-editor--envvar "="
+                  (shell-quote-argument with-editor-emacsclient-executable)
+                  ;; Tell the process where the server file is.
+                  (and (not server-use-tcp)
+                       (concat " --socket-name="
+                               (shell-quote-argument
+                                (expand-file-name server-name
+                                                  server-socket-dir)))))
+          process-environment)
+    (when server-use-tcp
+      (push (concat "EMACS_SERVER_FILE="
+                    (expand-file-name server-name server-auth-dir))
+            process-environment))
+    ;; As last resort fallback to the sleeping editor.
+    (push (concat "ALTERNATE_EDITOR=" with-editor-sleeping-editor)
+          process-environment)))
+
+(defun with-editor-server-window ()
+  (or (and buffer-file-name
+           (cdr (cl-find-if (lambda (cons)
+                              (string-match-p (car cons) buffer-file-name))
+                            with-editor-server-window-alist)))
+      server-window))
+
+(defun server-switch-buffer--with-editor-server-window-alist
+    (fn &optional next-buffer killed-one filepos)
+  "Honor `with-editor-server-window-alist' (which see)."
+  (let ((server-window (with-current-buffer
+                           (or next-buffer (current-buffer))
+                         (when with-editor-mode
+                           (setq with-editor-previous-winconf
+                                 (current-window-configuration)))
+                         (with-editor-server-window))))
+    (funcall fn next-buffer killed-one filepos)))
+
+(advice-add 'server-switch-buffer :around
+            'server-switch-buffer--with-editor-server-window-alist)
+
+(defun start-file-process--with-editor-process-filter
+    (fn name buffer program &rest program-args)
+  "When called inside a `with-editor' form and the Emacsclient
+cannot be used, then give the process the filter function
+`with-editor-process-filter'.  To avoid overriding the filter
+being added here you should use `with-editor-set-process-filter'
+instead of `set-process-filter' inside `with-editor' forms.
+
+When the `default-directory' is located on a remote machine,
+then also manipulate PROGRAM and PROGRAM-ARGS in order to set
+the appropriate editor environment variable."
+  (if (not with-editor--envvar)
+      (apply fn name buffer program program-args)
+    (when (file-remote-p default-directory)
+      (unless (equal program "env")
+        (push program program-args)
+        (setq program "env"))
+      (push (concat with-editor--envvar "=" with-editor-sleeping-editor)
+            program-args))
+    (let ((process (apply fn name buffer program program-args)))
+      (set-process-filter process 'with-editor-process-filter)
+      (process-put process 'default-dir default-directory)
+      process)))
+
+(advice-add 'start-file-process :around
+            'start-file-process--with-editor-process-filter)
+
+(defun with-editor-set-process-filter (process filter)
+  "Like `set-process-filter' but keep `with-editor-process-filter'.
+Give PROCESS the new FILTER but keep `with-editor-process-filter'
+if that was added earlier by the adviced `start-file-process'.
+
+Do so by wrapping the two filter functions using a lambda, which
+becomes the actual filter.  It calls `with-editor-process-filter'
+first, passing t as NO-STANDARD-FILTER.  Then it calls FILTER,
+which may or may not insert the text into the PROCESS' buffer."
+  (set-process-filter
+   process
+   (if (eq (process-filter process) 'with-editor-process-filter)
+       `(lambda (proc str)
+          (,filter proc str)
+          (with-editor-process-filter proc str t))
+     filter)))
+
+(defvar with-editor-filter-visit-hook nil)
+
+(defun with-editor-output-filter (string)
+  (save-match-data
+    (if (string-match "^WITH-EDITOR: \\([0-9]+\\) OPEN \\(.+?\\)\r?$" string)
+        (let ((pid  (match-string 1 string))
+              (file (match-string 2 string)))
+          (with-current-buffer
+              (find-file-noselect
+               (if (and (file-name-absolute-p file) default-directory)
+                   (concat (file-remote-p default-directory) file)
+                 (expand-file-name file)))
+            (with-editor-mode 1)
+            (setq with-editor--pid pid)
+            (run-hooks 'with-editor-filter-visit-hook)
+            (funcall (or (with-editor-server-window) 'switch-to-buffer)
+                     (current-buffer))
+            (kill-local-variable 'server-window))
+          nil)
+      string)))
+
+(defun with-editor-process-filter
+    (process string &optional no-default-filter)
+  "Listen for edit requests by child processes."
+  (let ((default-directory (process-get process 'default-dir)))
+    (with-editor-output-filter string))
+  (unless no-default-filter
+    (internal-default-process-filter process string)))
+
+(advice-add 'server-visit-files :after
+            'server-visit-files--with-editor-file-name-history-exclude)
+
+(defun server-visit-files--with-editor-file-name-history-exclude
+    (files _proc &optional _nowait)
+  (pcase-dolist (`(,file . ,_) files)
+    (when (cl-find-if (lambda (regexp)
+                        (string-match-p regexp file))
+                      with-editor-file-name-history-exclude)
+      (setq file-name-history (delete file file-name-history)))))
+
+;;; Augmentations
+
+;;;###autoload
+(cl-defun with-editor-export-editor (&optional (envvar "EDITOR"))
+  "Teach subsequent commands to use current Emacs instance as editor.
+
+Set and export the environment variable ENVVAR, by default
+\"EDITOR\".  The value is automatically generated to teach
+commands to use the current Emacs instance as \"the editor\".
+
+This works in `shell-mode', `term-mode' and `eshell-mode'."
+  (interactive (list (with-editor-read-envvar)))
+  (cond
+   ((derived-mode-p 'comint-mode 'term-mode)
+    (let ((process (get-buffer-process (current-buffer))))
+      (goto-char (process-mark process))
+      (process-send-string
+       process (format " export %s=%s\n" envvar
+                       (shell-quote-argument with-editor-sleeping-editor)))
+      (while (accept-process-output process 0.1))
+      (if (derived-mode-p 'term-mode)
+          (with-editor-set-process-filter process 'with-editor-emulate-terminal)
+        (add-hook 'comint-output-filter-functions 'with-editor-output-filter
+                  nil t))))
+   ((derived-mode-p 'eshell-mode)
+    (add-to-list 'eshell-preoutput-filter-functions
+                 'with-editor-output-filter)
+    (setenv envvar with-editor-sleeping-editor))
+   (t
+    (error "Cannot export environment variables in this buffer")))
+  (message "Successfully exported %s" envvar))
+
+;;;###autoload
+(defun with-editor-export-git-editor ()
+  "Like `with-editor-export-editor' but always set `$GIT_EDITOR'."
+  (interactive)
+  (with-editor-export-editor "GIT_EDITOR"))
+
+;;;###autoload
+(defun with-editor-export-hg-editor ()
+  "Like `with-editor-export-editor' but always set `$HG_EDITOR'."
+  (interactive)
+  (with-editor-export-editor "HG_EDITOR"))
+
+(defun with-editor-emulate-terminal (process string)
+  "Like `term-emulate-terminal' but also handle edit requests."
+  (when (with-editor-output-filter string)
+    (term-emulate-terminal process string)))
+
+(defvar with-editor-envvars '("EDITOR" "GIT_EDITOR" "HG_EDITOR"))
+
+(cl-defun with-editor-read-envvar
+    (&optional (prompt  "Set environment variable")
+               (default "EDITOR"))
+  (let ((reply (completing-read (if default
+                                    (format "%s (%s): " prompt default)
+                                  (concat prompt ": "))
+                                with-editor-envvars nil nil nil nil default)))
+    (if (string= reply "") (user-error "Nothing selected") reply)))
+
+;;;###autoload
+(define-minor-mode shell-command-with-editor-mode
+  "Teach `shell-command' to use current Emacs instance as editor.
+
+Teach `shell-command', and all commands that ultimately call that
+command, to use the current Emacs instance as editor by executing
+\"EDITOR=CLIENT COMMAND&\" instead of just \"COMMAND&\".
+
+CLIENT is automatically generated; EDITOR=CLIENT instructs
+COMMAND to use to the current Emacs instance as \"the editor\",
+assuming no other variable overrides the effect of \"$EDITOR\".
+CLIENT may be the path to an appropriate emacsclient executable
+with arguments, or a script which also works over Tramp.
+
+Alternatively you can use the `with-editor-async-shell-command',
+which also allows the use of another variable instead of
+\"EDITOR\"."
+  :global t)
+
+;;;###autoload
+(defun with-editor-async-shell-command
+    (command &optional output-buffer error-buffer envvar)
+  "Like `async-shell-command' but with `$EDITOR' set.
+
+Execute string \"ENVVAR=CLIENT COMMAND\" in an inferior shell;
+display output, if any.  With a prefix argument prompt for an
+environment variable, otherwise the default \"EDITOR\" variable
+is used.  With a negative prefix argument additionally insert
+the COMMAND's output at point.
+
+CLIENT is automatically generated; ENVVAR=CLIENT instructs
+COMMAND to use to the current Emacs instance as \"the editor\",
+assuming it respects ENVVAR as an \"EDITOR\"-like variable.
+CLIENT may be the path to an appropriate emacsclient executable
+with arguments, or a script which also works over Tramp.
+
+Also see `async-shell-command' and `shell-command'."
+  (interactive (with-editor-shell-command-read-args "Async shell command: " t))
+  (let ((with-editor--envvar envvar))
+    (with-editor
+      (async-shell-command command output-buffer error-buffer))))
+
+;;;###autoload
+(defun with-editor-shell-command
+    (command &optional output-buffer error-buffer envvar)
+  "Like `shell-command' or `with-editor-async-shell-command'.
+If COMMAND ends with \"&\" behave like the latter,
+else like the former."
+  (interactive (with-editor-shell-command-read-args "Shell command: "))
+  (if (string-match "&[ \t]*\\'" command)
+      (with-editor-async-shell-command
+       command output-buffer error-buffer envvar)
+    (shell-command command output-buffer error-buffer)))
+
+(defun with-editor-shell-command-read-args (prompt &optional async)
+  (let ((command (read-shell-command
+                  prompt nil nil
+                  (let ((filename (or buffer-file-name
+                                      (and (eq major-mode 'dired-mode)
+                                           (dired-get-filename nil t)))))
+                    (and filename (file-relative-name filename))))))
+    (list command
+          (if (or async (setq async (string-match-p "&[ \t]*\\'" command)))
+              (< (prefix-numeric-value current-prefix-arg) 0)
+            current-prefix-arg)
+          shell-command-default-error-buffer
+          (and async current-prefix-arg (with-editor-read-envvar)))))
+
+(defun shell-command--shell-command-with-editor-mode
+    (fn command &optional output-buffer error-buffer)
+  ;; `shell-mode' and its hook are intended for buffers in which an
+  ;; interactive shell is running, but `shell-command' also turns on
+  ;; that mode, even though it only runs the shell to run a single
+  ;; command.  The `with-editor-export-editor' hook function is only
+  ;; intended to be used in buffers in which an interactive shell is
+  ;; running, so it has to be remove here.
+  (let ((shell-mode-hook (remove 'with-editor-export-editor shell-mode-hook)))
+    (cond ((or (not (or with-editor--envvar shell-command-with-editor-mode))
+               (not (string-match-p "&\\'" command)))
+           (funcall fn command output-buffer error-buffer))
+          ((and with-editor-shell-command-use-emacsclient
+                with-editor-emacsclient-executable
+                (not (file-remote-p default-directory)))
+           (with-editor (funcall fn command output-buffer error-buffer)))
+          (t
+           (apply fn (format "%s=%s %s"
+                             (or with-editor--envvar "EDITOR")
+                             (shell-quote-argument with-editor-sleeping-editor)
+                             command)
+                  output-buffer error-buffer)
+           (ignore-errors
+             (let ((process (get-buffer-process
+                             (or output-buffer
+                                 (get-buffer "*Async Shell Command*")))))
+               (set-process-filter
+                process (lambda (proc str)
+                          (comint-output-filter proc str)
+                          (with-editor-process-filter proc str t)))
+               process))))))
+
+(advice-add 'shell-command :around
+            'shell-command--shell-command-with-editor-mode)
+
+;;; _
+
+(defun with-editor-debug ()
+  "Debug configuration issues.
+See info node `(with-editor)Debugging' for instructions."
+  (interactive)
+  (with-current-buffer (get-buffer-create "*with-editor-debug*")
+    (pop-to-buffer (current-buffer))
+    (erase-buffer)
+    (ignore-errors (with-editor))
+    (insert
+     (format "with-editor: %s\n" (locate-library "with-editor.el"))
+     (format "emacs: %s (%s)\n"
+             (expand-file-name invocation-name invocation-directory)
+             emacs-version)
+     "system:\n"
+     (format "  system-type: %s\n" system-type)
+     (format "  system-configuration: %s\n" system-configuration)
+     (format "  system-configuration-options: %s\n" system-configuration-options)
+     "server:\n"
+     (format "  server-running-p: %s\n" (server-running-p))
+     (format "  server-process: %S\n" server-process)
+     (format "  server-use-tcp: %s\n" server-use-tcp)
+     (format "  server-name: %s\n" server-name)
+     (format "  server-socket-dir: %s\n" server-socket-dir))
+    (if (and server-socket-dir (file-accessible-directory-p server-socket-dir))
+        (dolist (file (directory-files server-socket-dir nil "^[^.]"))
+          (insert (format "    %s\n" file)))
+      (insert (format "    %s: not an accessible directory\n"
+                      (if server-use-tcp "WARNING" "ERROR"))))
+    (insert (format "  server-auth-dir: %s\n" server-auth-dir))
+    (if (file-accessible-directory-p server-auth-dir)
+        (dolist (file (directory-files server-auth-dir nil "^[^.]"))
+          (insert (format "    %s\n" file)))
+      (insert (format "    %s: not an accessible directory\n"
+                      (if server-use-tcp "ERROR" "WARNING"))))
+    (let ((val with-editor-emacsclient-executable)
+          (def (default-value 'with-editor-emacsclient-executable))
+          (fun (let ((warning-minimum-level :error)
+                     (warning-minimum-log-level :error))
+                 (with-editor-locate-emacsclient))))
+      (insert "with-editor-emacsclient-executable:\n"
+              (format " value:   %s (%s)\n" val
+                      (and val (with-editor-emacsclient-version val)))
+              (format " default: %s (%s)\n" def
+                      (and def (with-editor-emacsclient-version def)))
+              (format " funcall: %s (%s)\n" fun
+                      (and fun (with-editor-emacsclient-version fun)))))
+    (insert "path:\n"
+            (format "  $PATH: %S\n" (getenv "PATH"))
+            (format "  exec-path: %s\n" exec-path))
+    (insert (format "  with-editor-emacsclient-path:\n"))
+    (dolist (dir (with-editor-emacsclient-path))
+      (insert (format "    %s (%s)\n" dir (car (file-attributes dir))))
+      (when (file-directory-p dir)
+        ;; Don't match emacsclientw.exe, it makes popup windows.
+        (dolist (exec (directory-files dir t "emacsclient\\(?:[^w]\\|\\'\\)"))
+          (insert (format "      %s (%s)\n" exec
+                          (with-editor-emacsclient-version exec))))))))
+
+(defconst with-editor-font-lock-keywords
+  '(("(\\(with-\\(?:git-\\)?editor\\)\\_>" (1 'font-lock-keyword-face))))
+(font-lock-add-keywords 'emacs-lisp-mode with-editor-font-lock-keywords)
+
+(provide 'with-editor)
+;; Local Variables:
+;; indent-tabs-mode: nil
+;; End:
+;;; with-editor.el ends here