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+;;; with-editor.el --- Use the Emacsclient as $EDITOR -*- lexical-binding: t -*-
+
+;; Copyright (C) 2014-2016 The Magit Project Contributors
+
+;; Author: Jonas Bernoulli <jonas@bernoul.li>
+;; Maintainer: Jonas Bernoulli <jonas@bernoul.li>
+
+;; Package-Requires: ((emacs "24.4") (async "1.5") (dash "2.12.1"))
+;; Keywords: tools
+;; Homepage: https://github.com/magit/with-editor
+
+;; This file is not part of GNU Emacs.
+
+;; This file is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this file. If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This library makes it possible to reliably use the Emacsclient as
+;; the `$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-mode-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)
+(require 'dash)
+(require 'server)
+(require 'tramp)
+(require 'tramp-sh nil t)
+
+(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."
+ (--if-let (with-editor-locate-emacsclient-1 (with-editor-emacsclient-path) 3)
+ it
+ (display-warning 'with-editor (format "\
+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."))
+ nil))
+
+(defun with-editor-locate-emacsclient-1 (path depth)
+ (let* ((version-lst (-take depth (split-string emacs-version "\\.")))
+ (version-reg (concat "^" (mapconcat #'identity version-lst "\\."))))
+ (or (locate-file-internal
+ "emacsclient" path
+ (cl-mapcan
+ (lambda (v) (cl-mapcar (lambda (e) (concat v e)) exec-suffixes))
+ (nconc (cl-mapcon (lambda (v)
+ (setq v (mapconcat #'identity (reverse v) "."))
+ (list v (concat "-" v) (concat ".emacs" v)))
+ (reverse version-lst))
+ (list "" "-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)
+ (-when-let (1st-line (car (process-lines exec "--version")))
+ (cadr (split-string 1st-line))))
+
+(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 process 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."
+ :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.")
+
+;;; 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 #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 #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 "\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)
+ 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
+ (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 ()
+ (message (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))
+ (if (or (not with-editor-emacsclient-executable)
+ (file-remote-p default-directory))
+ (setenv with-editor--envvar with-editor-sleeping-editor)
+ ;; 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 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.
+ (setenv with-editor--envvar
+ (concat (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))))))
+ (when server-use-tcp
+ (setenv "EMACS_SERVER_FILE"
+ (expand-file-name server-name server-auth-dir)))
+ ;; As last resort fallback to the sleeping editor.
+ (setenv "ALTERNATE_EDITOR" with-editor-sleeping-editor))
+ ,@body))
+
+(defun with-editor-server-window ()
+ (or (and buffer-file-name
+ (cdr (--first (string-match-p (car it) 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 (file-name-absolute-p file)
+ (if (tramp-tramp-file-p default-directory)
+ (with-parsed-tramp-file-name default-directory nil
+ (tramp-make-tramp-file-name method user host file hop))
+ 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)))
+
+;;; Augmentations
+
+(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 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)))
+ (filter (process-filter process)))
+ (set-process-filter process 'ignore)
+ (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))
+ (set-process-filter process filter)
+ (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))
+
+(defun with-editor-export-git-editor ()
+ "Like `with-editor-export-editor' but always set `$GIT_EDITOR'."
+ (interactive)
+ (with-editor-export-editor "GIT_EDITOR"))
+
+(defun with-editor-export-hg-editor ()
+ "Like `with-editor-export-editor' but always set `$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)))
+
+(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 \"$EDITOR\".
+CLIENT may be the path to an appropriate emacsclient executable
+with arguments, or a script which also works over Tramp.
+
+Alternatively you can use the `with-editor-async-shell-command',
+which also allows the use of another variable instead of
+\"EDITOR\"."
+ :global t)
+
+(defun with-editor-async-shell-command
+ (command &optional output-buffer error-buffer envvar)
+ "Like `async-shell-command' but with `$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 maybe 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))))
+
+(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
+ (--when-let (or buffer-file-name
+ (and (eq major-mode 'dired-mode)
+ (dired-get-filename nil t)))
+ (file-relative-name it)))))
+ (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)
+ (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-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)
+
+;;; with-editor.el ends soon
+
+(defun with-editor-debug ()
+ "Debug configuration issues.
+See `with-editor.info' 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))
+ (--each (directory-files server-socket-dir nil "^[^.]")
+ (insert (format " %s\n" it)))
+ (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)
+ (--each (directory-files server-auth-dir nil "^[^.]")
+ (insert (format " %s\n" it)))
+ (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 "magit-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"))
+ (--each (with-editor-emacsclient-path)
+ (insert (format " %s (%s)\n" it (car (file-attributes it))))
+ (when (file-directory-p it)
+ (dolist (exec (directory-files it t "emacsclient"))
+ (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