950 lines
40 KiB
EmacsLisp
950 lines
40 KiB
EmacsLisp
;;; with-editor.el --- Use the Emacsclient as $EDITOR -*- lexical-binding:t -*-
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;; Copyright (C) 2014-2022 The Magit Project Contributors
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;; Author: Jonas Bernoulli <jonas@bernoul.li>
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;; Homepage: https://github.com/magit/with-editor
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;; Keywords: processes terminals
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;; Package-Version: 3.2.0-git
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;; Package-Requires: ((emacs "25.1") (compat "28.1.1.0"))
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;; SPDX-License-Identifier: GPL-3.0-or-later
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;; This file 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
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;; by the Free Software Foundation, either version 3 of the License,
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;; or (at your option) any later version.
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;;
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;; This file 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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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this file. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This library makes it possible to reliably use the Emacsclient as
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;; the `$EDITOR' of child processes. It makes sure that they know how
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;; to call home. For remote processes a substitute is provided, which
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;; communicates with Emacs on standard output/input instead of using a
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;; socket as the Emacsclient does.
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;; It provides the commands `with-editor-async-shell-command' and
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;; `with-editor-shell-command', which are intended as replacements
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;; for `async-shell-command' and `shell-command'. They automatically
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;; export `$EDITOR' making sure the executed command uses the current
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;; Emacs instance as "the editor". With a prefix argument these
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;; commands prompt for an alternative environment variable such as
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;; `$GIT_EDITOR'. To always use these variants add this to your init
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;; file:
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;;
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;; (define-key (current-global-map)
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;; [remap async-shell-command] #'with-editor-async-shell-command)
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;; (define-key (current-global-map)
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;; [remap shell-command] #'with-editor-shell-command)
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;; Alternatively use the global `shell-command-with-editor-mode',
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;; which always sets `$EDITOR' for all Emacs commands which ultimately
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;; use `shell-command' to asynchronously run some shell command.
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;; The command `with-editor-export-editor' exports `$EDITOR' or
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;; another such environment variable in `shell-mode', `eshell-mode',
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;; `term-mode' and `vterm-mode' buffers. Use this Emacs command
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;; before executing a shell command which needs the editor set, or
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;; always arrange for the current Emacs instance to be used as editor
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;; by adding it to the appropriate mode hooks:
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;;
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;; (add-hook 'shell-mode-hook #'with-editor-export-editor)
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;; (add-hook 'eshell-mode-hook #'with-editor-export-editor)
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;; (add-hook 'term-exec-hook #'with-editor-export-editor)
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;; (add-hook 'vterm-mode-hook #'with-editor-export-editor)
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;; Some variants of this function exist, these two forms are
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;; equivalent:
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;;
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;; (add-hook 'shell-mode-hook
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;; (apply-partially #'with-editor-export-editor "GIT_EDITOR"))
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;; (add-hook 'shell-mode-hook #'with-editor-export-git-editor)
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;; This library can also be used by other packages which need to use
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;; the current Emacs instance as editor. In fact this library was
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;; written for Magit and its `git-commit-mode' and `git-rebase-mode'.
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;; Consult `git-rebase.el' and the related code in `magit-sequence.el'
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;; for a simple example.
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;;; Code:
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(require 'cl-lib)
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(require 'compat)
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(require 'server)
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(require 'shell)
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(eval-when-compile (require 'subr-x))
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(eval-when-compile
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(progn (require 'dired nil t)
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(require 'eshell nil t)
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(require 'term nil t)
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(condition-case err
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(require 'vterm nil t)
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(error (message "Error(vterm): %S" err)))
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(require 'warnings nil t)))
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(declare-function dired-get-filename 'dired)
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(declare-function term-emulate-terminal 'term)
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(declare-function vterm-send-return 'vterm)
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(declare-function vterm-send-string 'vterm)
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(defvar eshell-preoutput-filter-functions)
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(defvar git-commit-post-finish-hook)
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(defvar vterm--process)
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;;; Options
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(defgroup with-editor nil
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"Use the Emacsclient as $EDITOR."
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:group 'external
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:group 'server)
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(defun with-editor-locate-emacsclient ()
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"Search for a suitable Emacsclient executable."
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(or (with-editor-locate-emacsclient-1
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(with-editor-emacsclient-path)
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(length (split-string emacs-version "\\.")))
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(prog1 nil (display-warning 'with-editor "\
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Cannot determine a suitable Emacsclient
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Determining an Emacsclient executable suitable for the
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current Emacs instance failed. For more information
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please see https://github.com/magit/magit/wiki/Emacsclient."))))
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(defun with-editor-locate-emacsclient-1 (path depth)
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(let* ((version-lst (cl-subseq (split-string emacs-version "\\.") 0 depth))
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(version-reg (concat "^" (mapconcat #'identity version-lst "\\."))))
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(or (locate-file
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(if (equal (downcase invocation-name) "remacs")
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"remacsclient"
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"emacsclient")
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path
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(cl-mapcan
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(lambda (v) (cl-mapcar (lambda (e) (concat v e)) exec-suffixes))
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(nconc (and (boundp 'debian-emacs-flavor)
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(list (format ".%s" debian-emacs-flavor)))
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(cl-mapcon (lambda (v)
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(setq v (mapconcat #'identity (reverse v) "."))
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(list v (concat "-" v) (concat ".emacs" v)))
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(reverse version-lst))
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(list "" "-snapshot" ".emacs-snapshot")))
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(lambda (exec)
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(ignore-errors
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(string-match-p version-reg
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(with-editor-emacsclient-version exec)))))
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(and (> depth 1)
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(with-editor-locate-emacsclient-1 path (1- depth))))))
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(defun with-editor-emacsclient-version (exec)
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(let ((default-directory (file-name-directory exec)))
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(ignore-errors
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(cadr (split-string (car (process-lines exec "--version")))))))
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(defun with-editor-emacsclient-path ()
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(let ((path exec-path))
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(when invocation-directory
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(push (directory-file-name invocation-directory) path)
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(let* ((linkname (expand-file-name invocation-name invocation-directory))
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(truename (file-chase-links linkname)))
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(unless (equal truename linkname)
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(push (directory-file-name (file-name-directory truename)) path)))
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(when (eq system-type 'darwin)
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(let ((dir (expand-file-name "bin" invocation-directory)))
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(when (file-directory-p dir)
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(push dir path)))
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(when (string-search "Cellar" invocation-directory)
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(let ((dir (expand-file-name "../../../bin" invocation-directory)))
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(when (file-directory-p dir)
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(push dir path))))))
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(cl-remove-duplicates path :test #'equal)))
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(defcustom with-editor-emacsclient-executable (with-editor-locate-emacsclient)
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"The Emacsclient executable used by the `with-editor' macro."
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:group 'with-editor
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:type '(choice (string :tag "Executable")
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(const :tag "Don't use Emacsclient" nil)))
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(defcustom with-editor-sleeping-editor "\
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sh -c '\
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printf \"\\nWITH-EDITOR: $$ OPEN $0\\037 IN $(pwd)\\n\"; \
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sleep 604800 & sleep=$!; \
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trap \"kill $sleep; exit 0\" USR1; \
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trap \"kill $sleep; exit 1\" USR2; \
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wait $sleep'"
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"The sleeping editor, used when the Emacsclient cannot be used.
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This fallback is used for asynchronous processes started inside
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the macro `with-editor', when the process runs on a remote machine
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or for local processes when `with-editor-emacsclient-executable'
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is nil (i.e. when no suitable Emacsclient was found, or the user
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decided not to use it).
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Where the latter uses a socket to communicate with Emacs' server,
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this substitute prints edit requests to its standard output on
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which a process filter listens for such requests. As such it is
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not a complete substitute for a proper Emacsclient, it can only
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be used as $EDITOR of child process of the current Emacs instance.
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Some shells do not execute traps immediately when waiting for a
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child process, but by default we do use such a blocking child
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process.
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If you use such a shell (e.g. `csh' on FreeBSD, but not Debian),
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then you have to edit this option. You can either replace \"sh\"
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with \"bash\" (and install that), or you can use the older, less
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performant implementation:
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\"sh -c '\\
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echo -e \\\"\\nWITH-EDITOR: $$ OPEN $0 IN $(pwd)\\n\\\"; \\
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trap \\\"exit 0\\\" USR1; \\
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trap \\\"exit 1\" USR2; \\
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while true; do sleep 1; done'\"
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Note that the unit separator character ( ) right after the file
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name ($0) is required.
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Also note that using this alternative implementation leads to a
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delay of up to a second. The delay can be shortened by replacing
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\"sleep 1\" with \"sleep 0.01\", or if your implementation does
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not support floats, then by using \"nanosleep\" instead."
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:package-version '(with-editor . "2.8.0")
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:group 'with-editor
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:type 'string)
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(defcustom with-editor-finish-query-functions nil
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"List of functions called to query before finishing session.
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The buffer in question is current while the functions are called.
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If any of them returns nil, then the session is not finished and
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the buffer is not killed. The user should then fix the issue and
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try again. The functions are called with one argument. If it is
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non-nil then that indicates that the user used a prefix argument
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to force finishing the session despite issues. Functions should
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usually honor that and return non-nil."
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:group 'with-editor
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:type 'hook)
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(put 'with-editor-finish-query-functions 'permanent-local t)
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(defcustom with-editor-cancel-query-functions nil
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"List of functions called to query before canceling session.
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The buffer in question is current while the functions are called.
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If any of them returns nil, then the session is not canceled and
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the buffer is not killed. The user should then fix the issue and
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try again. The functions are called with one argument. If it is
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non-nil then that indicates that the user used a prefix argument
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to force canceling the session despite issues. Functions should
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usually honor that and return non-nil."
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:group 'with-editor
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:type 'hook)
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(put 'with-editor-cancel-query-functions 'permanent-local t)
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(defcustom with-editor-mode-lighter " WE"
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"The mode-line lighter of the With-Editor mode."
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:group 'with-editor
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:type '(choice (const :tag "No lighter" "") string))
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(defvar with-editor-server-window-alist nil
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"Alist of filename patterns vs corresponding `server-window'.
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Each element looks like (REGEXP . FUNCTION). Files matching
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REGEXP are selected using FUNCTION instead of the default in
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`server-window'.
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Note that when a package adds an entry here then it probably
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has a reason to disrespect `server-window' and it likely is
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not a good idea to change such entries.")
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(defvar with-editor-file-name-history-exclude nil
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"List of regexps for filenames `server-visit' should not remember.
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When a filename matches any of the regexps, then `server-visit'
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does not add it to the variable `file-name-history', which is
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used when reading a filename in the minibuffer.")
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(defcustom with-editor-shell-command-use-emacsclient t
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"Whether to use the emacsclient when running shell commands.
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This affects `with-editor-shell-command-async' and, if the input
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ends with \"&\" `with-editor-shell-command' .
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If `shell-command-with-editor-mode' is enabled, then it also
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affects `shell-command-async' and, if the input ends with \"&\"
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`shell-command'.
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This is a temporary kludge that lets you choose between two
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possible defects, the ones described in the issues #23 and #40.
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When t, then use the emacsclient. This has the disadvantage that
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`with-editor-mode' won't be enabled because we don't know whether
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this package was involved at all in the call to the emacsclient,
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and when it is not, then we really should. The problem is that
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the emacsclient doesn't pass a long any environment variables to
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the server. This will hopefully be fixed in Emacs eventually.
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When nil, then use the sleeping editor. Because in this case we
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know that this package is involved, we can enable the mode. But
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this makes it necessary that you invoke $EDITOR in shell scripts
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like so:
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eval \"$EDITOR\" file
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And some tools that do not handle $EDITOR properly also break."
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:package-version '(with-editor . "2.7.1")
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:group 'with-editor
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:type 'boolean)
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;;; Mode Commands
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(defvar with-editor-pre-finish-hook nil)
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(defvar with-editor-pre-cancel-hook nil)
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(defvar with-editor-post-finish-hook nil)
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(defvar with-editor-post-finish-hook-1 nil)
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(defvar with-editor-post-cancel-hook nil)
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(defvar with-editor-post-cancel-hook-1 nil)
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(defvar with-editor-cancel-alist nil)
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(put 'with-editor-pre-finish-hook 'permanent-local t)
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(put 'with-editor-pre-cancel-hook 'permanent-local t)
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(put 'with-editor-post-finish-hook 'permanent-local t)
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(put 'with-editor-post-cancel-hook 'permanent-local t)
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(defvar-local with-editor-show-usage t)
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(defvar-local with-editor-cancel-message nil)
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(defvar-local with-editor-previous-winconf nil)
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(put 'with-editor-cancel-message 'permanent-local t)
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(put 'with-editor-previous-winconf 'permanent-local t)
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(defvar-local with-editor--pid nil "For internal use.")
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(put 'with-editor--pid 'permanent-local t)
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(defun with-editor-finish (force)
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"Finish the current edit session."
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(interactive "P")
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(when (run-hook-with-args-until-failure
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'with-editor-finish-query-functions force)
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(let ((post-finish-hook with-editor-post-finish-hook)
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(post-commit-hook (bound-and-true-p git-commit-post-finish-hook))
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(dir default-directory))
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(run-hooks 'with-editor-pre-finish-hook)
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(with-editor-return nil)
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(accept-process-output nil 0.1)
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(with-temp-buffer
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(setq default-directory dir)
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(setq-local with-editor-post-finish-hook post-finish-hook)
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(when post-commit-hook
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(setq-local git-commit-post-finish-hook post-commit-hook))
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(run-hooks 'with-editor-post-finish-hook)))))
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(defun with-editor-cancel (force)
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"Cancel the current edit session."
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(interactive "P")
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(when (run-hook-with-args-until-failure
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'with-editor-cancel-query-functions force)
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(let ((message with-editor-cancel-message))
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(when (functionp message)
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(setq message (funcall message)))
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(let ((post-cancel-hook with-editor-post-cancel-hook)
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(with-editor-cancel-alist nil)
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(dir default-directory))
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(run-hooks 'with-editor-pre-cancel-hook)
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(with-editor-return t)
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(accept-process-output nil 0.1)
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(with-temp-buffer
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(setq default-directory dir)
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(setq-local with-editor-post-cancel-hook post-cancel-hook)
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(run-hooks 'with-editor-post-cancel-hook)))
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(message (or message "Canceled by user")))))
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(defun with-editor-return (cancel)
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(let ((winconf with-editor-previous-winconf)
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(clients server-buffer-clients)
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(dir default-directory)
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(pid with-editor--pid))
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(remove-hook 'kill-buffer-query-functions
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#'with-editor-kill-buffer-noop t)
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(cond (cancel
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(save-buffer)
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(if clients
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(dolist (client clients)
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(ignore-errors
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(server-send-string client "-error Canceled by user"))
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(delete-process client))
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;; Fallback for when emacs was used as $EDITOR
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;; instead of emacsclient or the sleeping editor.
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;; See https://github.com/magit/magit/issues/2258.
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(ignore-errors (delete-file buffer-file-name))
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(kill-buffer)))
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(t
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(save-buffer)
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(if clients
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;; Don't use `server-edit' because we do not want to
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;; show another buffer belonging to another client.
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;; See https://github.com/magit/magit/issues/2197.
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(server-done)
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(kill-buffer))))
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(when pid
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(let ((default-directory dir))
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(process-file "kill" nil nil nil
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"-s" (if cancel "USR2" "USR1") pid)))
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(when (and winconf (eq (window-configuration-frame winconf)
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(selected-frame)))
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(set-window-configuration winconf))))
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;;; Mode
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(defvar with-editor-mode-map
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(let ((map (make-sparse-keymap)))
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(define-key map "\C-c\C-c" #'with-editor-finish)
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(define-key map [remap server-edit] #'with-editor-finish)
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(define-key map [remap evil-save-and-close] #'with-editor-finish)
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(define-key map [remap evil-save-modified-and-close] #'with-editor-finish)
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(define-key map "\C-c\C-k" #'with-editor-cancel)
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(define-key map [remap kill-buffer] #'with-editor-cancel)
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(define-key map [remap ido-kill-buffer] #'with-editor-cancel)
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(define-key map [remap iswitchb-kill-buffer] #'with-editor-cancel)
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(define-key map [remap evil-quit] #'with-editor-cancel)
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map))
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(define-minor-mode with-editor-mode
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"Edit a file as the $EDITOR of an external process."
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:lighter with-editor-mode-lighter
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;; Protect the user from killing the buffer without using
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;; either `with-editor-finish' or `with-editor-cancel',
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;; and from removing the key bindings for these commands.
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(unless with-editor-mode
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(user-error "With-Editor mode cannot be turned off"))
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(add-hook 'kill-buffer-query-functions
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#'with-editor-kill-buffer-noop nil t)
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;; `server-execute' displays a message which is not
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;; correct when using this mode.
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(when with-editor-show-usage
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(with-editor-usage-message)))
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(put 'with-editor-mode 'permanent-local t)
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(defun with-editor-kill-buffer-noop ()
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;; We started doing this in response to #64, but it is not safe
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;; to do so, because the client has already been killed, causing
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;; `with-editor-return' (called by `with-editor-cancel') to delete
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;; the file, see #66. The reason we delete the file in the first
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;; place are https://github.com/magit/magit/issues/2258 and
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;; https://github.com/magit/magit/issues/2248.
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;; (if (memq this-command '(save-buffers-kill-terminal
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;; save-buffers-kill-emacs))
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||
;; (let ((with-editor-cancel-query-functions nil))
|
||
;; (with-editor-cancel nil)
|
||
;; t)
|
||
;; ...)
|
||
;; So go back to always doing this instead:
|
||
(user-error (substitute-command-keys (format "\
|
||
Don't kill this buffer %S. Instead cancel using \\[with-editor-cancel]"
|
||
(current-buffer)))))
|
||
|
||
(defvar-local with-editor-usage-message "\
|
||
Type \\[with-editor-finish] to finish, \
|
||
or \\[with-editor-cancel] to cancel")
|
||
|
||
(defun with-editor-usage-message ()
|
||
;; Run after `server-execute', which is run using
|
||
;; a timer which starts immediately.
|
||
(let ((buffer (current-buffer)))
|
||
(run-with-timer
|
||
0.05 nil
|
||
(lambda ()
|
||
(with-current-buffer buffer
|
||
(message (substitute-command-keys with-editor-usage-message)))))))
|
||
|
||
;;; 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 a literal string 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))
|
||
|
||
(defmacro with-editor* (envvar &rest body)
|
||
"Use the Emacsclient as the editor while evaluating BODY.
|
||
Modify the `process-environment' for processes started in BODY,
|
||
instructing them to use the Emacsclient as editor. ENVVAR is the
|
||
environment variable that is exported to do so, it is evaluated
|
||
at run-time.
|
||
\n(fn [ENVVAR] BODY...)"
|
||
(declare (indent defun) (debug (sexp body)))
|
||
`(let ((with-editor--envvar ,envvar)
|
||
(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 &rest args)
|
||
"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))))
|
||
(apply fn next-buffer args)))
|
||
|
||
(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)
|
||
|
||
(cl-defun make-process--with-editor-process-filter
|
||
(fn &rest keys &key name buffer command coding noquery stop
|
||
connection-type filter sentinel stderr file-handler
|
||
&allow-other-keys)
|
||
"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 and
|
||
FILE-HANDLER is non-nil, then also manipulate COMMAND in order
|
||
to set the appropriate editor environment variable."
|
||
(if (or (not file-handler) (not with-editor--envvar))
|
||
(apply fn keys)
|
||
(when (file-remote-p default-directory)
|
||
(unless (equal (car command) "env")
|
||
(push "env" command))
|
||
(push (concat with-editor--envvar "=" with-editor-sleeping-editor)
|
||
(cdr command)))
|
||
(let* ((filter (if filter
|
||
(lambda (process output)
|
||
(funcall filter process output)
|
||
(with-editor-process-filter process output t))
|
||
#'with-editor-process-filter))
|
||
(process (funcall fn
|
||
:name name
|
||
:buffer buffer
|
||
:command command
|
||
:coding coding
|
||
:noquery noquery
|
||
:stop stop
|
||
:connection-type connection-type
|
||
:filter filter
|
||
:sentinel sentinel
|
||
:stderr stderr
|
||
:file-handler file-handler)))
|
||
(process-put process 'default-dir default-directory)
|
||
process)))
|
||
|
||
(advice-add #'make-process :around #'make-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 advised `start-file-process'.
|
||
|
||
Do so by wrapping the two filter functions using a lambda, which
|
||
becomes the actual filter. It calls FILTER first, which may or
|
||
may not insert the text into the PROCESS's buffer. Then it calls
|
||
`with-editor-process-filter', passing t as NO-STANDARD-FILTER."
|
||
(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)
|
||
|
||
(defconst with-editor-sleeping-editor-regexp
|
||
"^WITH-EDITOR: \\([0-9]+\\) OPEN \\([^ ]+?\\)\\(?: IN \\([^\r]+?\\)\\)?\r?$")
|
||
|
||
(defvar with-editor--max-incomplete-length 1000)
|
||
|
||
(defun with-editor-sleeping-editor-filter (process string)
|
||
(when-let ((incomplete (and process (process-get process 'incomplete))))
|
||
(setq string (concat incomplete string)))
|
||
(save-match-data
|
||
(cond
|
||
((and process (not (string-suffix-p "\n" string)))
|
||
(let ((length (length string)))
|
||
(when (> length with-editor--max-incomplete-length)
|
||
(setq string
|
||
(substring string
|
||
(- length with-editor--max-incomplete-length)))))
|
||
(process-put process 'incomplete string)
|
||
nil)
|
||
((string-match with-editor-sleeping-editor-regexp string)
|
||
(when process
|
||
(process-put process 'incomplete nil))
|
||
(let ((pid (match-string 1 string))
|
||
(file (match-string 2 string))
|
||
(dir (match-string 3 string)))
|
||
(unless (file-name-absolute-p file)
|
||
(setq file (expand-file-name file dir)))
|
||
(when default-directory
|
||
(setq file (concat (file-remote-p default-directory) file)))
|
||
(with-current-buffer (find-file-noselect file)
|
||
(with-editor-mode 1)
|
||
(setq with-editor--pid pid)
|
||
(setq with-editor-previous-winconf
|
||
(current-window-configuration))
|
||
(run-hooks 'with-editor-filter-visit-hook)
|
||
(funcall (or (with-editor-server-window) #'switch-to-buffer)
|
||
(current-buffer))
|
||
(kill-local-variable 'server-window)))
|
||
nil)
|
||
(t 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-sleeping-editor-filter process 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', `eshell-mode' and
|
||
`vterm'."
|
||
(interactive (list (with-editor-read-envvar)))
|
||
(cond
|
||
((derived-mode-p 'comint-mode 'term-mode)
|
||
(when-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))
|
||
((derived-mode-p 'vterm-mode)
|
||
(if with-editor-emacsclient-executable
|
||
(let ((with-editor--envvar envvar)
|
||
(process-environment process-environment))
|
||
(with-editor--setup)
|
||
(while (accept-process-output vterm--process 0.1))
|
||
(when-let ((v (getenv envvar)))
|
||
(vterm-send-string (format "export %s=%S" envvar v))
|
||
(vterm-send-return))
|
||
(when-let ((v (getenv "EMACS_SERVER_FILE")))
|
||
(vterm-send-string (format "export EMACS_SERVER_FILE=%S" v))
|
||
(vterm-send-return))
|
||
(vterm-send-string "clear")
|
||
(vterm-send-return))
|
||
(error "Cannot use sleeping editor in this buffer")))
|
||
(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-output-filter (string)
|
||
"Handle edit requests on behalf of `comint-mode' and `eshell-mode'."
|
||
(with-editor-sleeping-editor-filter nil string))
|
||
|
||
(defun with-editor-emulate-terminal (process string)
|
||
"Like `term-emulate-terminal' but also handle edit requests."
|
||
(let ((with-editor-sleeping-editor-regexp
|
||
(substring with-editor-sleeping-editor-regexp 1)))
|
||
(with-editor-sleeping-editor-filter process 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-suffix-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
|
||
(funcall 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
|