diff --git a/lisp/misearch.el b/lisp/misearch.el index 9ac28c26c48..44023d029d9 100644 --- a/lisp/misearch.el +++ b/lisp/misearch.el @@ -387,6 +387,148 @@ multi-isearch-files-regexp (goto-char (if isearch-forward (point-min) (point-max))) (isearch-forward-regexp nil t))) + +;;; Global multi-file and multi-buffer replacements as diff + +(defcustom multi-file-diff-unsaved 'save-buffers + "What to do with unsaved edits when showing multi-file replacements as diffs. +If the value is `save-buffers', save unsaved buffers before creating diff. +If the value is `use-file', use text from the file even when the visiting +file buffer is modified. +If the value is `use-modified-buffer', use text from the file-visiting +modified buffer to be able to use unsaved changes. However, when the file +is not visited in a buffer, or the buffer is not modified, still read +contents from the file." + :type '(choice + (const :tag "Save buffers" save-buffers) + (const :tag "Use file" use-file) + (const :tag "Use modified buffer" use-modified-buffer)) + :version "30.1") + +(defun multi-file-replace-as-diff (files-or-buffers from-string replacements regexp-flag delimited-flag) + "Show as diffs replacements of FROM-STRING with REPLACEMENTS. +FILES-OR-BUFFERS is a list of either file names or buffers. +REGEXP-FLAG and DELIMITED-FLAG have the same meaning as in `perform-replace'." + (require 'diff) + (let ((inhibit-message t) + (diff-buffer (get-buffer-create "*replace-diff*"))) + (when (eq multi-file-diff-unsaved 'save-buffers) + (save-some-buffers t (lambda () + (seq-some (lambda (f-or-b) + (if (bufferp f-or-b) + (eq f-or-b (current-buffer)) + (equal f-or-b (buffer-file-name)))) + files-or-buffers)))) + (with-current-buffer diff-buffer + (setq-local buffer-read-only t) + (erase-buffer) + (diff-mode) + (setq-local buffer-read-only nil) + (buffer-disable-undo (current-buffer))) + (dolist (file-or-buffer files-or-buffers) + (let ((file-name (if (bufferp file-or-buffer) buffer-file-name file-or-buffer)) + (file-buffer (when (eq multi-file-diff-unsaved 'use-modified-buffer) + (find-buffer-visiting file-or-buffer)))) + (when file-name + (with-temp-buffer + (if (bufferp file-or-buffer) + (insert-buffer-substring file-or-buffer) + (if (and file-buffer (buffer-modified-p file-buffer)) + (insert-buffer-substring file-buffer) + (insert-file-contents file-or-buffer))) + (goto-char (point-min)) + (perform-replace from-string replacements nil regexp-flag delimited-flag) + (multi-file-diff-no-select file-or-buffer (current-buffer) nil diff-buffer + (concat file-name "~") file-name))))) + (with-current-buffer diff-buffer + (diff-setup-whitespace) + (font-lock-ensure) + (buffer-enable-undo (current-buffer)) + (setq-local buffer-read-only t) + (setq-local revert-buffer-function + (lambda (_ignore-auto _noconfirm) + (multi-file-replace-as-diff + files-or-buffers from-string replacements regexp-flag delimited-flag))) + (goto-char (point-min))) + (pop-to-buffer diff-buffer))) + +;;;###autoload +(defun multi-file-replace-regexp-as-diff (files regexp to-string &optional delimited) + "Show as diffs replacements of REGEXP with TO-STRING in FILES. +DELIMITED has the same meaning as in `replace-regexp'. +With a prefix argument, ask for a wildcard, and show diffs for files +whose file names match the specified wildcard." + (interactive + (let ((files (if current-prefix-arg + (multi-isearch-read-matching-files) + (multi-isearch-read-files))) + (common + (query-replace-read-args + (concat "Replace" + (if current-prefix-arg " word" "") + " regexp as diff in files") + t t))) + (list files (nth 0 common) (nth 1 common) (nth 2 common)))) + (multi-file-replace-as-diff files regexp to-string t delimited)) + +;;;###autoload +(defun replace-regexp-as-diff (regexp to-string &optional delimited) + "Show as diffs replacements of REGEXP with TO-STRING in the current buffer. +DELIMITED has the same meaning as in `replace-regexp'." + (interactive + (let ((common + (query-replace-read-args + (concat "Replace" + (if current-prefix-arg " word" "") + " regexp as diff") + t t))) + (list (nth 0 common) (nth 1 common) (nth 2 common)))) + (multi-file-replace-as-diff + (list (current-buffer)) regexp to-string t delimited)) + +(defun multi-file-diff-no-select (old new &optional switches buf label-old label-new) + ;; Based on `diff-no-select' tailored to multi-file diffs. + "Compare the OLD and NEW file/buffer. +If the optional SWITCHES is nil, the switches specified in the +variable `diff-switches' are passed to the diff command, +otherwise SWITCHES is used. SWITCHES can be a string or a list +of strings. BUF should be non-nil. LABEL-OLD and LABEL-NEW +specify labels to use for file names." + (unless (bufferp new) (setq new (expand-file-name new))) + (unless (bufferp old) (setq old (expand-file-name old))) + (or switches (setq switches diff-switches)) ; If not specified, use default. + (setq switches (ensure-list switches)) + (diff-check-labels) + (let* ((old-alt (diff-file-local-copy old)) + (new-alt (diff-file-local-copy new)) + (command + (mapconcat #'identity + `(,diff-command + ;; Use explicitly specified switches + ,@switches + ,@(mapcar #'shell-quote-argument + (nconc + (and (or old-alt new-alt) + (eq diff-use-labels t) + (list "--label" + (cond ((stringp label-old) label-old) + ((stringp old) old) + ((prin1-to-string old))) + "--label" + (cond ((stringp label-new) label-new) + ((stringp new) new) + ((prin1-to-string new))))) + (list (or old-alt old) + (or new-alt new))))) + " "))) + (with-current-buffer buf + (insert command "\n") + (call-process shell-file-name nil buf nil + shell-command-switch command) + (if old-alt (delete-file old-alt)) + (if new-alt (delete-file new-alt))))) + + (defvar unload-function-defs-list) (defun multi-isearch-unload-function ()