443 lines
19 KiB
EmacsLisp
443 lines
19 KiB
EmacsLisp
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;;; dired-async.el --- Asynchronous dired actions -*- lexical-binding: t -*-
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;; Copyright (C) 2012-2019 Free Software Foundation, Inc.
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;; Authors: John Wiegley <jwiegley@gmail.com>
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;; Thierry Volpiatto <thievol@posteo.net>
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;; Keywords: dired async network
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;; X-URL: https://github.com/jwiegley/dired-async
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;; This program 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 by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program 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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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This file provide a redefinition of `dired-create-file' function,
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;; performs copies, moves and all what is handled by `dired-create-file'
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;; in the background using a slave Emacs process,
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;; by means of the async.el module.
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;; To use it, put this in your .emacs:
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;; (dired-async-mode 1)
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;; This will enable async copy/rename etc...
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;; in dired and helm.
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;;; Code:
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(require 'cl-lib)
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(require 'dired-aux)
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(require 'async)
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(eval-when-compile
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(defvar async-callback))
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(defgroup dired-async nil
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"Copy rename files asynchronously from dired."
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:group 'dired)
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(defcustom dired-async-env-variables-regexp
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"\\`\\(tramp-\\(default\\|connection\\|remote\\)\\|ange-ftp\\)-.*"
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"Variables matching this regexp will be loaded on Child Emacs."
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:type 'regexp)
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(defcustom dired-async-message-function 'dired-async-mode-line-message
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"Function to use to notify result when operation finish.
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Should take same args as `message'."
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:type 'function)
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(defcustom dired-async-log-file "/tmp/dired-async.log"
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"File use to communicate errors from Child Emacs to host Emacs."
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:type 'string)
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(defcustom dired-async-mode-lighter '(:eval
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(when (eq major-mode 'dired-mode)
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" Async"))
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"Mode line lighter used for `dired-async-mode'."
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:risky t
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:type 'sexp)
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(defcustom dired-async-skip-fast t
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"If non-nil, skip async for fast operations.
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Same device renames and copying and renaming files smaller than
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`dired-async-small-file-max' are considered fast."
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:risky t
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:type 'bool)
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(defcustom dired-async-small-file-max 5000000
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"Files smaller than this in bytes are considered fast to copy
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or rename for `dired-async-skip-fast'."
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:risky t
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:type 'int)
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(defface dired-async-message
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'((t (:foreground "yellow")))
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"Face used for mode-line message.")
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(defface dired-async-failures
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'((t (:foreground "red")))
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"Face used for mode-line message.")
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(defface dired-async-mode-message
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'((t (:foreground "Gold")))
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"Face used for `dired-async--modeline-mode' lighter.")
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(define-minor-mode dired-async--modeline-mode
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"Notify mode-line that an async process run."
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:global t
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:lighter (:eval (propertize (format " [%s Async job(s) running]"
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(length (dired-async-processes)))
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'face 'dired-async-mode-message))
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(unless dired-async--modeline-mode
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(let ((visible-bell t)) (ding))))
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(defun dired-async-mode-line-message (text face &rest args)
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"Notify end of operation in `mode-line'."
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(message nil)
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(let ((mode-line-format (concat
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" " (propertize
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(if args
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(apply #'format text args)
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text)
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'face face))))
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(force-mode-line-update)
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(sit-for 3)
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(force-mode-line-update)))
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(defun dired-async-processes ()
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(cl-loop for p in (process-list)
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when (cl-loop for c in (process-command p) thereis
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(string= "async-batch-invoke" c))
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collect p))
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(defun dired-async-kill-process ()
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(interactive)
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(let* ((processes (dired-async-processes))
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(proc (car (last processes))))
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(and proc (delete-process proc))
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(unless (> (length processes) 1)
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(dired-async--modeline-mode -1))))
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(defun dired-async-after-file-create (total operation failures skipped)
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"Callback function used for operation handled by `dired-create-file'."
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(unless (dired-async-processes)
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;; Turn off mode-line notification
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;; only when last process end.
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(dired-async--modeline-mode -1))
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(when operation
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(if (file-exists-p dired-async-log-file)
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(progn
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(pop-to-buffer (get-buffer-create dired-log-buffer))
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(goto-char (point-max))
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(setq inhibit-read-only t)
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(insert "Error: ")
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(insert-file-contents dired-async-log-file)
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(special-mode)
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(shrink-window-if-larger-than-buffer)
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(delete-file dired-async-log-file))
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(run-with-timer
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0.1 nil
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(lambda ()
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;; First send error messages.
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(cond (failures
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(funcall dired-async-message-function
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"%s failed for %d of %d file%s -- See *Dired log* buffer"
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'dired-async-failures
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(car operation) (length failures)
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total (dired-plural-s total)))
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(skipped
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(funcall dired-async-message-function
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"%s: %d of %d file%s skipped -- See *Dired log* buffer"
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'dired-async-failures
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(car operation) (length skipped) total
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(dired-plural-s total))))
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(when dired-buffers
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(cl-loop for (_f . b) in dired-buffers
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when (buffer-live-p b)
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do (with-current-buffer b
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(when (and (not (file-remote-p default-directory nil t))
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(file-exists-p default-directory))
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(revert-buffer nil t)))))
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;; Finally send the success message.
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(funcall dired-async-message-function
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"Asynchronous %s of %s on %s file%s done"
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'dired-async-message
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(car operation) (cadr operation)
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total (dired-plural-s total)))))))
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(defun dired-async-maybe-kill-ftp ()
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"Return a form to kill ftp process in child emacs."
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(quote
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(progn
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(require 'cl-lib)
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(let ((buf (cl-loop for b in (buffer-list)
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thereis (and (string-match
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"\\`\\*ftp.*"
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(buffer-name b)) b))))
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(when buf (kill-buffer buf))))))
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(defsubst dired-async--directory-p (attributes)
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"Return non-nil if ATTRIBUTES is for a directory.
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See `file-attributes'."
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;; Can also be a string for symlinks, so check for t explicitly.
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(eq (file-attribute-type attributes) t))
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(defsubst dired-async--same-device-p (f1 f2)
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"Return non-nil if F1 and F2 have the same device number."
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(= (file-attribute-device-number (file-attributes f1))
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(file-attribute-device-number (file-attributes f2))))
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(defun dired-async--small-file-p (file)
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"Return non-nil if FILE is small (can create quickly)."
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(let ((a (file-attributes file)))
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;; Directories are always large since we can't easily figure out
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;; their total size.
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(and (not (dired-async--directory-p a))
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(< (file-attribute-size a) dired-async-small-file-max))))
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(defun dired-async--skip-async-p (file-creator file name-constructor)
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"Return non-nil if we should skip async for FILE.
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See `dired-create-files' for FILE-CREATOR and NAME-CONSTRUCTOR."
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;; Skip async for small files.
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(or (dired-async--small-file-p file)
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;; Also skip async for same device renames.
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(and (eq file-creator 'dired-rename-file)
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(let ((new (funcall name-constructor file)))
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(dired-async--same-device-p file (file-name-directory new))))))
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(defun dired-async--smart-create-files (old-func file-creator operation fn-list name-constructor
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&optional marker-char)
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"Around advice for `dired-create-files'.
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Uses async like `dired-async-create-files' but skips certain fast
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cases if `dired-async-skip-fast' is non-nil."
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(let (async-list quick-list)
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(dolist (old fn-list)
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(if (dired-async--skip-async-p file-creator old name-constructor)
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(push old quick-list)
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(push old async-list)))
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(when async-list
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(dired-async-create-files file-creator operation (nreverse async-list) name-constructor marker-char))
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(when quick-list
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(funcall old-func file-creator operation (nreverse quick-list) name-constructor marker-char))))
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(defvar overwrite-query)
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(defun dired-async-create-files (file-creator operation fn-list name-constructor
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&optional _marker-char)
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"Same as `dired-create-files' but asynchronous.
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See `dired-create-files' for the behavior of arguments."
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(setq overwrite-query nil)
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(let ((total (length fn-list))
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failures async-fn-list skipped callback
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async-quiet-switch)
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(let (to)
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(dolist (from fn-list)
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(setq to (funcall name-constructor from))
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(if (and (equal to from)
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(null (eq file-creator 'backup-file)))
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(progn
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(setq to nil)
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(dired-log "Cannot %s to same file: %s\n"
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(downcase operation) from)))
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(if (not to)
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(setq skipped (cons (dired-make-relative from) skipped))
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(let* ((overwrite (and (null (eq file-creator 'backup-file))
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(file-exists-p to)))
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(dired-overwrite-confirmed ; for dired-handle-overwrite
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(and overwrite
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(let ((help-form `(format "\
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Type SPC or `y' to overwrite file `%s',
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DEL or `n' to skip to next,
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ESC or `q' to not overwrite any of the remaining files,
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`!' to overwrite all remaining files with no more questions." ,to)))
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(dired-query 'overwrite-query "Overwrite `%s'?" to)))))
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;; Handle the `dired-copy-file' file-creator specially
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;; When copying a directory to another directory or
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;; possibly to itself or one of its subdirectories.
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;; e.g "~/foo/" => "~/test/"
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;; or "~/foo/" =>"~/foo/"
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;; or "~/foo/ => ~/foo/bar/")
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;; In this case the 'name-constructor' have set the destination
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;; TO to "~/test/foo" because the old emacs23 behavior
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;; of `copy-directory' was to not create the subdirectory
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;; and instead copy the contents.
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;; With the new behavior of `copy-directory'
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;; (similar to the `cp' shell command) we don't
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;; need such a construction of the target directory,
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;; so modify the destination TO to "~/test/" instead of "~/test/foo/".
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(let ((destname (file-name-directory to)))
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(when (and (file-directory-p from)
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(file-directory-p to)
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(eq file-creator 'dired-copy-file))
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(setq to destname))
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;; If DESTNAME is a subdirectory of FROM, not a symlink,
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;; and the method in use is copying, signal an error.
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(and (eq t (car (file-attributes destname)))
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(eq file-creator 'dired-copy-file)
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(file-in-directory-p destname from)
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(error "Cannot copy `%s' into its subdirectory `%s'"
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from to)))
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(if overwrite
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(or (and dired-overwrite-confirmed
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(push (cons from to) async-fn-list))
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(progn
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(push (dired-make-relative from) failures)
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(dired-log "%s `%s' to `%s' failed\n"
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operation from to)))
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(push (cons from to) async-fn-list)))))
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;; Fix tramp issue #80 with emacs-26, use "-q" only when needed.
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(setq async-quiet-switch
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(if (and (boundp 'tramp-cache-read-persistent-data)
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async-fn-list
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(cl-loop for (_from . to) in async-fn-list
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thereis (file-remote-p to)))
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"-q" "-Q"))
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;; When failures have been printed to dired log add the date at bob.
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(when (or failures skipped) (dired-log t))
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;; When async-fn-list is empty that's mean only one file
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;; had to be copied and user finally answer NO.
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;; In this case async process will never start and callback
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;; will have no chance to run, so notify failures here.
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(unless async-fn-list
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(cond (failures
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(funcall dired-async-message-function
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"%s failed for %d of %d file%s -- See *Dired log* buffer"
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'dired-async-failures
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operation (length failures)
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total (dired-plural-s total)))
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(skipped
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(funcall dired-async-message-function
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"%s: %d of %d file%s skipped -- See *Dired log* buffer"
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'dired-async-failures
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operation (length skipped) total
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(dired-plural-s total)))))
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;; Setup callback.
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(setq callback
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(lambda (&optional _ignore)
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(dired-async-after-file-create
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|
|
total (list operation (length async-fn-list)) failures skipped)
|
|||
|
|
(when (string= (downcase operation) "rename")
|
|||
|
|
(cl-loop for (file . to) in async-fn-list
|
|||
|
|
for bf = (get-file-buffer file)
|
|||
|
|
for destp = (file-exists-p to)
|
|||
|
|
do (and bf destp
|
|||
|
|
(with-current-buffer bf
|
|||
|
|
(set-visited-file-name to t t))))))))
|
|||
|
|
;; Start async process.
|
|||
|
|
(when async-fn-list
|
|||
|
|
(async-start `(lambda ()
|
|||
|
|
(require 'cl-lib) (require 'dired-aux) (require 'dired-x)
|
|||
|
|
,(async-inject-variables dired-async-env-variables-regexp)
|
|||
|
|
(let ((dired-recursive-copies (quote always))
|
|||
|
|
(dired-copy-preserve-time
|
|||
|
|
,dired-copy-preserve-time))
|
|||
|
|
(setq overwrite-backup-query nil)
|
|||
|
|
;; Inline `backup-file' as long as it is not
|
|||
|
|
;; available in emacs.
|
|||
|
|
(defalias 'backup-file
|
|||
|
|
;; Same feature as "cp -f --backup=numbered from to"
|
|||
|
|
;; Symlinks are copied as file from source unlike
|
|||
|
|
;; `dired-copy-file' which is same as cp -d.
|
|||
|
|
;; Directories are omitted.
|
|||
|
|
(lambda (from to ok)
|
|||
|
|
(cond ((file-directory-p from) (ignore))
|
|||
|
|
(t (let ((count 0))
|
|||
|
|
(while (let ((attrs (file-attributes to)))
|
|||
|
|
(and attrs (null (nth 0 attrs))))
|
|||
|
|
(cl-incf count)
|
|||
|
|
(setq to (concat (file-name-sans-versions to)
|
|||
|
|
(format ".~%s~" count)))))
|
|||
|
|
(condition-case err
|
|||
|
|
(copy-file from to ok dired-copy-preserve-time)
|
|||
|
|
(file-date-error
|
|||
|
|
(dired-log "Can't set date on %s:\n%s\n" from err)))))))
|
|||
|
|
;; Now run the FILE-CREATOR function on files.
|
|||
|
|
(cl-loop with fn = (quote ,file-creator)
|
|||
|
|
for (from . dest) in (quote ,async-fn-list)
|
|||
|
|
do (condition-case err
|
|||
|
|
(funcall fn from dest t)
|
|||
|
|
(file-error
|
|||
|
|
(dired-log "%s: %s\n" (car err) (cdr err))
|
|||
|
|
nil)))
|
|||
|
|
(when (get-buffer dired-log-buffer)
|
|||
|
|
(dired-log t)
|
|||
|
|
(with-current-buffer dired-log-buffer
|
|||
|
|
(write-region (point-min) (point-max)
|
|||
|
|
,dired-async-log-file))))
|
|||
|
|
,(dired-async-maybe-kill-ftp))
|
|||
|
|
callback)
|
|||
|
|
;; Run mode-line notifications while process running.
|
|||
|
|
(dired-async--modeline-mode 1)
|
|||
|
|
(message "%s proceeding asynchronously..." operation))))
|
|||
|
|
|
|||
|
|
(defvar wdired-use-interactive-rename)
|
|||
|
|
(defun dired-async-wdired-do-renames (old-fn &rest args)
|
|||
|
|
;; Perhaps a better fix would be to ask for renaming BEFORE starting
|
|||
|
|
;; OLD-FN when `wdired-use-interactive-rename' is non-nil. For now
|
|||
|
|
;; just bind it to nil to ensure no questions will be asked between
|
|||
|
|
;; each rename.
|
|||
|
|
(let (wdired-use-interactive-rename)
|
|||
|
|
(apply old-fn args)))
|
|||
|
|
|
|||
|
|
;;;###autoload
|
|||
|
|
(define-minor-mode dired-async-mode
|
|||
|
|
"Do dired actions asynchronously."
|
|||
|
|
:lighter dired-async-mode-lighter
|
|||
|
|
:global t
|
|||
|
|
(if dired-async-mode
|
|||
|
|
(progn
|
|||
|
|
(advice-add 'dired-create-files :around #'dired-async--smart-create-files)
|
|||
|
|
(advice-add 'wdired-do-renames :around #'dired-async-wdired-do-renames))
|
|||
|
|
(progn
|
|||
|
|
(advice-remove 'dired-create-files #'dired-async--smart-create-files)
|
|||
|
|
(advice-remove 'wdired-do-renames #'dired-async-wdired-do-renames))))
|
|||
|
|
|
|||
|
|
(defmacro dired-async--with-async-create-files (&rest body)
|
|||
|
|
"Evaluate BODY with ‘dired-create-files’ set to ‘dired-async-create-files’."
|
|||
|
|
(declare (indent 0))
|
|||
|
|
`(cl-letf (((symbol-function 'dired-create-files) #'dired-async-create-files))
|
|||
|
|
,@body))
|
|||
|
|
|
|||
|
|
;;;###autoload
|
|||
|
|
(defun dired-async-do-copy (&optional arg)
|
|||
|
|
"Run ‘dired-do-copy’ asynchronously."
|
|||
|
|
(interactive "P")
|
|||
|
|
(dired-async--with-async-create-files
|
|||
|
|
(dired-do-copy arg)))
|
|||
|
|
|
|||
|
|
;;;###autoload
|
|||
|
|
(defun dired-async-do-symlink (&optional arg)
|
|||
|
|
"Run ‘dired-do-symlink’ asynchronously."
|
|||
|
|
(interactive "P")
|
|||
|
|
(dired-async--with-async-create-files
|
|||
|
|
(dired-do-symlink arg)))
|
|||
|
|
|
|||
|
|
;;;###autoload
|
|||
|
|
(defun dired-async-do-hardlink (&optional arg)
|
|||
|
|
"Run ‘dired-do-hardlink’ asynchronously."
|
|||
|
|
(interactive "P")
|
|||
|
|
(dired-async--with-async-create-files
|
|||
|
|
(dired-do-hardlink arg)))
|
|||
|
|
|
|||
|
|
;;;###autoload
|
|||
|
|
(defun dired-async-do-rename (&optional arg)
|
|||
|
|
"Run ‘dired-do-rename’ asynchronously."
|
|||
|
|
(interactive "P")
|
|||
|
|
(dired-async--with-async-create-files
|
|||
|
|
(dired-do-rename arg)))
|
|||
|
|
|
|||
|
|
(provide 'dired-async)
|
|||
|
|
|
|||
|
|
;;; dired-async.el ends here
|