mirror of
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789ee3e1d5
* doc/lispref/os.texi (System Environment): Add `path-separator' function and `null-device' variable and function. * etc/NEWS: Mention 'null-device' and 'path-separator'. Fix typos. * lisp/files-x.el (path-separator, null-device): New defuns. (Bug#3736) * lisp/net/tramp-adb.el (tramp-adb-connection-local-default-shell-variables): Rename from `tramp-adb-connection-local-default-profile'. * lisp/net/tramp-integration.el (tramp-connection-local-default-system-variables): New defvar. Add it to connection-local profiles. (tramp-connection-local-default-shell-variables): Rename from `tramp-connection-local-default-profile'. * lisp/progmodes/grep.el (grep-hello-file): New defun. (grep-compute-defaults): Use `null-device' function for remote case. Handle remote `hello-file'. Use `process-file-shell-command'. (grep,grep-expand-keywords, lgrep): Use `null-device' function for remote case.
748 lines
29 KiB
EmacsLisp
748 lines
29 KiB
EmacsLisp
;;; files-x.el --- extended file handling commands
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;; Copyright (C) 2009-2020 Free Software Foundation, Inc.
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;; Author: Juri Linkov <juri@jurta.org>
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;; Maintainer: emacs-devel@gnu.org
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;; Keywords: files
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;; Package: emacs
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;; This file is part of GNU Emacs.
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;; GNU Emacs 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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;; GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This file defines additional infrequently used file- and
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;; directory-handling commands that should not be in files.el
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;; to not make the dumped image bigger.
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;;; Code:
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(eval-when-compile (require 'subr-x)) ; for string-trim-right
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;;; Commands to add/delete file-local/directory-local variables.
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(defun read-file-local-variable (prompt)
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"Read file-local variable using PROMPT and completion.
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Intended to be used in the `interactive' spec of
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`add-file-local-variable', `delete-file-local-variable',
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`add-dir-local-variable', `delete-dir-local-variable'."
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(let* ((default (variable-at-point))
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(default (and (symbolp default) (boundp default)
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(symbol-name default)))
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(variable
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(completing-read
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(format-prompt prompt default)
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obarray
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(lambda (sym)
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(or (custom-variable-p sym)
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(get sym 'safe-local-variable)
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(memq sym '(mode eval coding unibyte))))
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nil nil nil default nil)))
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(and (stringp variable) (intern variable))))
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(defun read-file-local-variable-value (variable)
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"Read value of file-local VARIABLE using completion.
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Intended to be used in the `interactive' spec of
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`add-file-local-variable' and `add-dir-local-variable'."
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(cond
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((eq variable 'mode)
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(let* ((default (and (symbolp major-mode) (symbol-name major-mode)))
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(value
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(completing-read
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(format-prompt "Add %s with value" default variable)
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obarray
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(lambda (sym)
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(string-match-p "-mode\\'" (symbol-name sym)))
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nil nil nil default nil)))
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(and (stringp value)
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(intern (replace-regexp-in-string "-mode\\'" "" value)))))
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((eq variable 'eval)
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(read--expression (format "Add %s with expression: " variable)))
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((eq variable 'coding)
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(let ((default (and (symbolp buffer-file-coding-system)
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(symbol-name buffer-file-coding-system))))
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(read-coding-system (format-prompt "Add %s with value" default variable)
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default)))
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(t
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(let ((default (format "%S"
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(cond ((eq variable 'unibyte) t)
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((boundp variable)
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(symbol-value variable)))))
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(minibuffer-completing-symbol t))
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(read-from-minibuffer (format "Add %s with value: " variable)
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nil read-expression-map t
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'set-variable-value-history
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default)))))
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(defun read-file-local-variable-mode ()
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"Read per-directory file-local variable's mode using completion.
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Intended to be used in the `interactive' spec of
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`add-dir-local-variable', `delete-dir-local-variable'."
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(let* ((default (and (symbolp major-mode) (symbol-name major-mode)))
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(mode
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(completing-read
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(format-prompt "Mode or subdirectory" default)
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obarray
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(lambda (sym)
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(and (string-match-p "-mode\\'" (symbol-name sym))
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(not (or (memq sym minor-mode-list)
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(string-match-p "-minor-mode\\'"
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(symbol-name sym))))))
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nil nil nil default nil)))
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(cond
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((equal mode "nil") nil)
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((and (stringp mode) (fboundp (intern mode))) (intern mode))
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(t mode))))
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(defun modify-file-local-variable-message (variable value op)
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(let* ((not-value (make-symbol ""))
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(old-value (cond ((eq variable 'mode)
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major-mode)
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((eq variable 'coding)
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buffer-file-coding-system)
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(t (if (and (symbolp variable)
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(boundp variable))
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(symbol-value variable)
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not-value))))
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(new-value (if (eq op 'delete)
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(cond ((eq variable 'mode)
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(default-value 'major-mode))
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((eq variable 'coding)
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(default-value 'buffer-file-coding-system))
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(t (if (and (symbolp variable)
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(default-boundp variable))
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(default-value variable)
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not-value)))
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(cond ((eq variable 'mode)
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(let ((string (format "%S" value)))
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(if (string-match-p "-mode\\'" string)
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value
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(intern (concat string "-mode")))))
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(t value)))))
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(when (or (eq old-value not-value)
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(eq new-value not-value)
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(not (equal old-value new-value)))
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(message "%s" (substitute-command-keys
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"For this change to take effect revisit file using \\[revert-buffer]")))))
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(defun modify-file-local-variable (variable value op &optional interactive)
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"Modify file-local VARIABLE in Local Variables depending on operation OP.
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If OP is `add-or-replace' then delete all existing settings of
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VARIABLE (except `mode' and `eval') and add a new file-local VARIABLE
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with VALUE to the Local Variables list.
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If there is no Local Variables list in the current file buffer and OP
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is not `delete' then this function adds the first line containing the
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string `Local Variables:' and the last line containing the string `End:'.
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If OP is `delete' then delete all existing settings of VARIABLE
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from the Local Variables list ignoring the input argument VALUE."
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(catch 'exit
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(let ((beg (point)) end replaced-pos)
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(unless enable-local-variables
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(throw 'exit (message "File-local variables are disabled")))
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;; Look for "Local variables:" line in last page.
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(widen)
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(goto-char (point-max))
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(search-backward "\n\^L" (max (- (point-max) 3000) (point-min)) 'move)
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;; Add "Local variables:" list if not found.
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(unless (let ((case-fold-search t))
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(search-forward "Local Variables:" nil t))
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;; Don't add "Local variables:" list for the deletion operation.
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(when (eq op 'delete)
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(throw 'exit (progn (goto-char beg)
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(message "Local Variables not found"))))
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(goto-char (point-max))
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(let ((comment-style 'plain)
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(comment-start (or comment-start ";; ")))
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(comment-region
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(prog1 (setq beg (point))
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(insert "\nLocal Variables:\nEnd:\n"))
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(point)))
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(unless (let ((case-fold-search t))
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(goto-char beg)
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(search-forward "Local Variables:" nil t))
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(throw 'exit (message "Can't add file-local variables"))))
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;; prefix is what comes before "local variables:" in its line.
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;; suffix is what comes after "local variables:" in its line.
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(let* ((prefix (buffer-substring (line-beginning-position)
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(match-beginning 0)))
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(suffix (buffer-substring (point) (line-end-position)))
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(prefix-re (concat "^" (regexp-quote prefix)))
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(suffix-re (concat (regexp-quote suffix) "$")))
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;; Find or add missing "End:".
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(forward-line 1)
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(setq beg (point))
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(save-excursion
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(unless (let ((case-fold-search t))
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(re-search-forward
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(concat prefix-re "[ \t]*End:[ \t]*" suffix-re)
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nil t))
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(save-excursion
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(insert (format "%sEnd:%s\n" prefix suffix))))
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(beginning-of-line)
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(setq end (point-marker)))
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;; Find and delete all existing variable/value pairs.
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(when (member op '(add-or-replace delete))
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(if (and (eq op 'add-or-replace) (memq variable '(mode eval)))
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(goto-char end)
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(goto-char beg)
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(while (re-search-forward
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(format "%s%S:.*%s" prefix-re variable suffix-re) end t)
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(delete-region (match-beginning 0) (1+ (match-end 0)))
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(setq replaced-pos (point)))))
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;; Add a new variable/value pair. Add `mode' to the start, add new
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;; variable to the end, and add a replaced variable to its last location.
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(when (eq op 'add-or-replace)
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(cond
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((eq variable 'mode) (goto-char beg))
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((null replaced-pos) (goto-char end))
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(replaced-pos (goto-char replaced-pos)))
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(insert (format "%s%S: %S%s\n" prefix variable value suffix))))
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(when interactive
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(modify-file-local-variable-message variable value op)))))
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;;;###autoload
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(defun add-file-local-variable (variable value &optional interactive)
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"Add file-local VARIABLE with its VALUE to the Local Variables list.
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This command deletes all existing settings of VARIABLE (except `mode'
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and `eval') and adds a new file-local VARIABLE with VALUE to the
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Local Variables list.
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If there is no Local Variables list in the current file buffer
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then this function adds the first line containing the string
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`Local Variables:' and the last line containing the string `End:'."
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(interactive
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(let ((variable (read-file-local-variable "Add file-local variable")))
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;; Error before reading value.
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(if (equal variable 'lexical-binding)
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(user-error "The `%s' variable must be set at the start of the file"
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variable))
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(list variable (read-file-local-variable-value variable) t)))
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(if (equal variable 'lexical-binding)
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(user-error "The `%s' variable must be set at the start of the file"
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variable))
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(modify-file-local-variable variable value 'add-or-replace interactive))
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;;;###autoload
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(defun delete-file-local-variable (variable &optional interactive)
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"Delete all settings of file-local VARIABLE from the Local Variables list."
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(interactive
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(list (read-file-local-variable "Delete file-local variable") t))
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(modify-file-local-variable variable nil 'delete interactive))
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(defun modify-file-local-variable-prop-line (variable value op &optional interactive)
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"Modify file-local VARIABLE in the -*- line depending on operation OP.
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If OP is `add-or-replace' then delete all existing settings of
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VARIABLE (except `mode' and `eval') and add a new file-local VARIABLE
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with VALUE to the -*- line.
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If there is no -*- line at the beginning of the current file buffer
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and OP is not `delete' then this function adds the -*- line.
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If OP is `delete' then delete all existing settings of VARIABLE
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from the -*- line ignoring the input argument VALUE."
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(catch 'exit
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(let ((beg (point)) end replaced-pos)
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(unless enable-local-variables
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(throw 'exit (message "File-local variables are disabled")))
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;; Find the -*- line at the beginning of the current buffer.
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(widen)
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(goto-char (point-min))
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(setq end (set-auto-mode-1))
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(if end
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(setq beg (point-marker) end (copy-marker end))
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;; Add the -*- line if not found.
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;; Don't add the -*- line for the deletion operation.
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(when (eq op 'delete)
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(throw 'exit (progn (goto-char beg)
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(message "The -*- line not found"))))
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(goto-char (point-min))
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;; Skip interpreter magic line "#!" or XML declaration.
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(when (or (looking-at file-auto-mode-skip)
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(looking-at "<\\?xml[^>\n]*>$"))
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(forward-line 1))
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(let ((comment-style 'plain)
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(comment-start (or comment-start ";;; "))
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(line-beg (line-beginning-position))
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(ce nil))
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(comment-normalize-vars)
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;; If the first line contains a comment.
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(if (save-excursion
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(and (looking-at comment-start-skip)
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(goto-char (match-end 0))
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(re-search-forward comment-end-skip)
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(goto-char (match-beginning 0))
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;; Still on the same line?
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(equal line-beg (line-beginning-position))
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(setq ce (point))))
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;; Add local variables to the end of the existing comment.
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(progn
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(goto-char ce)
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(insert " -*-")
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(setq beg (point-marker))
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(setq end (point-marker))
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(insert "-*-"))
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;; Otherwise, add a new comment before the first line.
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(comment-region
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(prog1 (point)
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(insert "-*-")
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(setq beg (point-marker))
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(setq end (point-marker))
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(insert "-*-\n"))
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(point)))))
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(cond
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((looking-at "[ \t]*\\([^ \t\n\r:;]+\\)\\([ \t]*-\\*-\\)")
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;; Simple form: "-*- MODENAME -*-".
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(if (eq variable 'mode)
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;; Replace or delete MODENAME
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(progn
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(when (member op '(add-or-replace delete))
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(delete-region (match-beginning 1) (match-end 1)))
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(when (eq op 'add-or-replace)
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(goto-char (match-beginning 1))
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(insert (format "%S" value))))
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;; Else, turn `MODENAME' into `mode:MODENAME'
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;; and add `VARIABLE: VALUE;'
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(goto-char (match-beginning 2))
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(insert (format "; %S: %S; " variable value))
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(goto-char (match-beginning 1))
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(insert " mode: ")))
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(t
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;; Hairy form: '-*-' [ <variable> ':' <value> ';' ]* '-*-'
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;; Find and delete all existing variable/value pairs.
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(when (member op '(add-or-replace delete))
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(if (and (eq op 'add-or-replace) (memq variable '(mode eval)))
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(goto-char end)
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(goto-char beg)
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(while (< (point) end)
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(or (looking-at "[ \t]*\\([^ \t\n:]+\\)[ \t]*:[ \t]*")
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(throw 'exit (message "Malformed -*- line")))
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(goto-char (match-end 0))
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(let ((key (intern (match-string 1))))
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(save-restriction
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(narrow-to-region (point) end)
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(let ((read-circle nil))
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(read (current-buffer))))
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(skip-chars-forward " \t;")
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(when (eq key variable)
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(delete-region (match-beginning 0) (point))
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(setq replaced-pos (point)))))))
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;; Add a new variable/value pair. Add `mode' to the start, add new
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;; variable to the end, and add a replaced variable to its last location.
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(when (eq op 'add-or-replace)
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(cond
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((eq variable 'mode) (goto-char beg))
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((null replaced-pos) (goto-char end))
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(replaced-pos (goto-char replaced-pos)))
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(if (and (save-excursion
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(skip-chars-backward " \t")
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(not (eq (char-before) ?\;)))
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(not (equal (point) (marker-position beg)))
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;; When existing `-*- -*-' is empty, beg > end.
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(not (> (marker-position beg) (marker-position end))))
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(insert ";"))
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(unless (eq (char-before) ?\s) (insert " "))
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(insert (format "%S: %S;" variable value))
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(unless (eq (char-after) ?\s) (insert " ")))))
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(when interactive
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(modify-file-local-variable-message variable value op)))))
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;;;###autoload
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(defun add-file-local-variable-prop-line (variable value &optional interactive)
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"Add file-local VARIABLE with its VALUE to the -*- line.
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This command deletes all existing settings of VARIABLE (except `mode'
|
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and `eval') and adds a new file-local VARIABLE with VALUE to
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the -*- line.
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If there is no -*- line at the beginning of the current file buffer
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then this function adds it."
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(interactive
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(let ((variable (read-file-local-variable "Add -*- file-local variable")))
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(list variable (read-file-local-variable-value variable) t)))
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(modify-file-local-variable-prop-line variable value 'add-or-replace interactive))
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;;;###autoload
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(defun delete-file-local-variable-prop-line (variable &optional interactive)
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"Delete all settings of file-local VARIABLE from the -*- line."
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(interactive
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(list (read-file-local-variable "Delete -*- file-local variable") t))
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(modify-file-local-variable-prop-line variable nil 'delete interactive))
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(defvar auto-insert) ; from autoinsert.el
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(defun modify-dir-local-variable (mode variable value op)
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"Modify directory-local VARIABLE in .dir-locals.el depending on operation OP.
|
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If OP is `add-or-replace' then delete all existing settings of
|
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VARIABLE (except `mode' and `eval') and add a new directory-local VARIABLE
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with VALUE to the MODE alist where MODE can be a mode name symbol or
|
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a subdirectory name.
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If .dir-locals.el was not found and OP is not `delete' then create
|
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this file in the current directory.
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If OP is `delete' then delete all existing settings of VARIABLE
|
||
from the MODE alist ignoring the input argument VALUE."
|
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(catch 'exit
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(unless enable-local-variables
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||
(throw 'exit (message "Directory-local variables are disabled")))
|
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(let* ((dir-or-cache (and (buffer-file-name)
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(not (file-remote-p (buffer-file-name)))
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(dir-locals-find-file (buffer-file-name))))
|
||
(variables-file
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;; If there are several .dir-locals, the user probably
|
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;; wants to edit the last one (the highest priority).
|
||
(cond ((stringp dir-or-cache)
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(car (last (dir-locals--all-files dir-or-cache))))
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((consp dir-or-cache) ; result from cache
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;; If cache element has an mtime, assume it came
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;; from a file. Otherwise, assume it was set
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;; directly.
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(if (nth 2 dir-or-cache)
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(car (last (dir-locals--all-files (car dir-or-cache))))
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(cadr dir-or-cache)))
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;; Try to make a proper file-name.
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(t (expand-file-name dir-locals-file))))
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||
variables)
|
||
;; I can't be bothered to handle this case right now.
|
||
;; Dir locals were set directly from a class. You need to
|
||
;; directly modify the class in dir-locals-class-alist.
|
||
(and variables-file (not (stringp variables-file))
|
||
(throw 'exit (message "Directory locals were not set from a file")))
|
||
;; Don't create ".dir-locals.el" for the deletion operation.
|
||
(and (eq op 'delete)
|
||
(or (not variables-file)
|
||
(not (file-exists-p variables-file)))
|
||
(throw 'exit (message "No .dir-locals.el file was found")))
|
||
(let ((auto-insert nil))
|
||
(find-file variables-file))
|
||
(widen)
|
||
(goto-char (point-min))
|
||
|
||
;; Read alist of directory-local variables.
|
||
(ignore-errors
|
||
(delete-region
|
||
(prog1 (point)
|
||
(setq variables (let ((read-circle nil))
|
||
(read (current-buffer)))))
|
||
(point)))
|
||
|
||
;; Add or replace variable in alist of directory-local variables.
|
||
(let ((mode-assoc (assoc mode variables)))
|
||
(if mode-assoc
|
||
(setq variables
|
||
(cons (cons mode
|
||
(if (eq op 'delete)
|
||
(assq-delete-all variable (cdr mode-assoc))
|
||
(cons
|
||
(cons variable value)
|
||
(if (memq variable '(mode eval))
|
||
(cdr mode-assoc)
|
||
(assq-delete-all variable (cdr mode-assoc))))))
|
||
(assoc-delete-all mode variables)))
|
||
(setq variables
|
||
(cons `(,mode . ((,variable . ,value)))
|
||
variables))))
|
||
|
||
;; Invalidate cache (may be needed if this .dir-locals.el file
|
||
;; will be written with the same timestamp as is already present
|
||
;; in the cache, see bug#13860).
|
||
(setq dir-locals-directory-cache
|
||
(assoc-delete-all (file-name-directory variables-file)
|
||
dir-locals-directory-cache))
|
||
|
||
;; Insert modified alist of directory-local variables.
|
||
(insert ";;; Directory Local Variables\n")
|
||
(insert ";;; For more information see (info \"(emacs) Directory Variables\")\n\n")
|
||
(princ (dir-locals-to-string
|
||
(sort variables
|
||
(lambda (a b)
|
||
(cond
|
||
((null (car a)) t)
|
||
((null (car b)) nil)
|
||
((and (symbolp (car a)) (stringp (car b))) t)
|
||
((and (symbolp (car b)) (stringp (car a))) nil)
|
||
(t (string< (car a) (car b)))))))
|
||
(current-buffer))
|
||
(goto-char (point-min))
|
||
(indent-sexp))))
|
||
|
||
(defun dir-locals-to-string (variables)
|
||
"Output alists of VARIABLES to string in dotted pair notation syntax."
|
||
(format "(%s)" (mapconcat
|
||
(lambda (mode-variables)
|
||
(format "(%S . %s)"
|
||
(car mode-variables)
|
||
(format "(%s)" (mapconcat
|
||
(lambda (variable-value)
|
||
(format "(%S . %s)"
|
||
(car variable-value)
|
||
(string-trim-right
|
||
(pp-to-string
|
||
(cdr variable-value)))))
|
||
(cdr mode-variables) "\n"))))
|
||
variables "\n")))
|
||
|
||
;;;###autoload
|
||
(defun add-dir-local-variable (mode variable value)
|
||
"Add directory-local VARIABLE with its VALUE and MODE to .dir-locals.el."
|
||
(interactive
|
||
(let (variable)
|
||
(list
|
||
(read-file-local-variable-mode)
|
||
(setq variable (read-file-local-variable "Add directory-local variable"))
|
||
(read-file-local-variable-value variable))))
|
||
(modify-dir-local-variable mode variable value 'add-or-replace))
|
||
|
||
;;;###autoload
|
||
(defun delete-dir-local-variable (mode variable)
|
||
"Delete all MODE settings of file-local VARIABLE from .dir-locals.el."
|
||
(interactive
|
||
(list
|
||
(read-file-local-variable-mode)
|
||
(read-file-local-variable "Delete directory-local variable")))
|
||
(modify-dir-local-variable mode variable nil 'delete))
|
||
|
||
;;;###autoload
|
||
(defun copy-file-locals-to-dir-locals ()
|
||
"Copy file-local variables to .dir-locals.el."
|
||
(interactive)
|
||
(dolist (elt file-local-variables-alist)
|
||
(unless (assq (car elt) dir-local-variables-alist)
|
||
(add-dir-local-variable major-mode (car elt) (cdr elt)))))
|
||
|
||
;;;###autoload
|
||
(defun copy-dir-locals-to-file-locals ()
|
||
"Copy directory-local variables to the Local Variables list."
|
||
(interactive)
|
||
(dolist (elt dir-local-variables-alist)
|
||
(add-file-local-variable (car elt) (cdr elt))))
|
||
|
||
;;;###autoload
|
||
(defun copy-dir-locals-to-file-locals-prop-line ()
|
||
"Copy directory-local variables to the -*- line."
|
||
(interactive)
|
||
(dolist (elt dir-local-variables-alist)
|
||
(add-file-local-variable-prop-line (car elt) (cdr elt))))
|
||
|
||
|
||
;;; connection-local variables.
|
||
|
||
;;;###autoload
|
||
(defvar enable-connection-local-variables t
|
||
"Non-nil means enable use of connection-local variables.")
|
||
|
||
(defvar connection-local-variables-alist nil
|
||
"Alist of connection-local variable settings in the current buffer.
|
||
Each element in this list has the form (VAR . VALUE), where VAR
|
||
is a connection-local variable (a symbol) and VALUE is its value.
|
||
The actual value in the buffer may differ from VALUE, if it is
|
||
changed by the user.")
|
||
(make-variable-buffer-local 'connection-local-variables-alist)
|
||
(setq ignored-local-variables
|
||
(cons 'connection-local-variables-alist ignored-local-variables))
|
||
|
||
(defvar connection-local-profile-alist nil
|
||
"Alist mapping connection profiles to variable lists.
|
||
Each element in this list has the form (PROFILE VARIABLES).
|
||
PROFILE is the name of a connection profile (a symbol).
|
||
VARIABLES is a list that declares connection-local variables for
|
||
PROFILE. An element in VARIABLES is an alist whose elements are
|
||
of the form (VAR . VALUE).")
|
||
|
||
(defvar connection-local-criteria-alist nil
|
||
"Alist mapping connection criteria to connection profiles.
|
||
Each element in this list has the form (CRITERIA PROFILES).
|
||
CRITERIA is a plist identifying a connection and the application
|
||
using this connection. Property names might be `:application',
|
||
`:protocol', `:user' and `:machine'. The property value of
|
||
`:application' is a symbol, all other property values are
|
||
strings. All properties are optional; if CRITERIA is nil, it
|
||
always applies.
|
||
PROFILES is a list of connection profiles (symbols).")
|
||
|
||
(defsubst connection-local-normalize-criteria (criteria)
|
||
"Normalize plist CRITERIA according to properties.
|
||
Return a reordered plist."
|
||
(apply
|
||
'append
|
||
(mapcar
|
||
(lambda (property)
|
||
(when (and (plist-member criteria property) (plist-get criteria property))
|
||
(list property (plist-get criteria property))))
|
||
'(:application :protocol :user :machine))))
|
||
|
||
(defsubst connection-local-get-profiles (criteria)
|
||
"Return the connection profiles list for CRITERIA.
|
||
CRITERIA is a plist identifying a connection and the application
|
||
using this connection, see `connection-local-criteria-alist'."
|
||
(let (profiles)
|
||
(dolist (crit-alist connection-local-criteria-alist)
|
||
(let ((crit criteria)
|
||
(match t))
|
||
(while (and crit match)
|
||
(when (plist-member (car crit-alist) (car crit))
|
||
(setq match (equal (plist-get (car crit-alist) (car crit))
|
||
(plist-get criteria (car crit)))))
|
||
(setq crit (cddr crit)))
|
||
(when match
|
||
(setq profiles (append profiles (cdr crit-alist))))))
|
||
(delete-dups profiles)))
|
||
|
||
;;;###autoload
|
||
(defun connection-local-set-profiles (criteria &rest profiles)
|
||
"Add PROFILES for CRITERIA.
|
||
CRITERIA is a plist identifying a connection and the application
|
||
using this connection, see `connection-local-criteria-alist'.
|
||
PROFILES are the names of connection profiles (a symbol).
|
||
|
||
When a connection to a remote server is opened and CRITERIA
|
||
matches to that server, the connection-local variables from
|
||
PROFILES are applied to the corresponding process buffer. The
|
||
variables for a connection profile are defined using
|
||
`connection-local-set-profile-variables'."
|
||
(unless (listp criteria)
|
||
(error "Wrong criteria `%s'" criteria))
|
||
(dolist (profile profiles)
|
||
(unless (assq profile connection-local-profile-alist)
|
||
(error "No such connection profile `%s'" (symbol-name profile))))
|
||
(let* ((criteria (connection-local-normalize-criteria criteria))
|
||
(slot (assoc criteria connection-local-criteria-alist)))
|
||
(if slot
|
||
(setcdr slot (delete-dups (append (cdr slot) profiles)))
|
||
(setq connection-local-criteria-alist
|
||
(cons (cons criteria (delete-dups profiles))
|
||
connection-local-criteria-alist)))))
|
||
|
||
(defsubst connection-local-get-profile-variables (profile)
|
||
"Return the connection-local variable list for PROFILE."
|
||
(cdr (assq profile connection-local-profile-alist)))
|
||
|
||
;;;###autoload
|
||
(defun connection-local-set-profile-variables (profile variables)
|
||
"Map the symbol PROFILE to a list of variable settings.
|
||
VARIABLES is a list that declares connection-local variables for
|
||
the connection profile. An element in VARIABLES is an alist
|
||
whose elements are of the form (VAR . VALUE).
|
||
|
||
When a connection to a remote server is opened, the server's
|
||
connection profiles are found. A server may be assigned a
|
||
connection profile using `connection-local-set-profiles'. Then
|
||
variables are set in the server's process buffer according to the
|
||
VARIABLES list of the connection profile. The list is processed
|
||
in order."
|
||
(setf (alist-get profile connection-local-profile-alist) variables))
|
||
|
||
(defun hack-connection-local-variables (criteria)
|
||
"Read connection-local variables according to CRITERIA.
|
||
Store the connection-local variables in buffer local
|
||
variable`connection-local-variables-alist'.
|
||
|
||
This does nothing if `enable-connection-local-variables' is nil."
|
||
(when enable-connection-local-variables
|
||
;; Filter connection profiles.
|
||
(dolist (profile (connection-local-get-profiles criteria))
|
||
;; Loop over variables.
|
||
(dolist (variable (connection-local-get-profile-variables profile))
|
||
(unless (assq (car variable) connection-local-variables-alist)
|
||
(push variable connection-local-variables-alist))))
|
||
;; Push them to `file-local-variables-alist'. Connection-local
|
||
;; variables do not appear from external files. So we can regard
|
||
;; them as safe.
|
||
(let ((enable-local-variables :all))
|
||
(hack-local-variables-filter connection-local-variables-alist nil))))
|
||
|
||
;;;###autoload
|
||
(defun hack-connection-local-variables-apply (criteria)
|
||
"Apply connection-local variables identified by CRITERIA.
|
||
Other local variables, like file-local and dir-local variables,
|
||
will not be changed."
|
||
(hack-connection-local-variables criteria)
|
||
(let ((file-local-variables-alist
|
||
(copy-tree connection-local-variables-alist)))
|
||
(hack-local-variables-apply)))
|
||
|
||
(defsubst connection-local-criteria-for-default-directory ()
|
||
"Return a connection-local criteria, which represents `default-directory'."
|
||
(when (file-remote-p default-directory)
|
||
`(:application tramp
|
||
:protocol ,(file-remote-p default-directory 'method)
|
||
:user ,(file-remote-p default-directory 'user)
|
||
:machine ,(file-remote-p default-directory 'host))))
|
||
|
||
;;;###autoload
|
||
(defmacro with-connection-local-variables (&rest body)
|
||
"Apply connection-local variables according to `default-directory'.
|
||
Execute BODY, and unwind connection-local variables."
|
||
(declare (debug t))
|
||
`(if (file-remote-p default-directory)
|
||
(let ((enable-connection-local-variables t)
|
||
(old-buffer-local-variables (buffer-local-variables))
|
||
connection-local-variables-alist)
|
||
(hack-connection-local-variables-apply
|
||
(connection-local-criteria-for-default-directory))
|
||
(unwind-protect
|
||
(progn ,@body)
|
||
;; Cleanup.
|
||
(dolist (variable connection-local-variables-alist)
|
||
(let ((elt (assq (car variable) old-buffer-local-variables)))
|
||
(if elt
|
||
(set (make-local-variable (car elt)) (cdr elt))
|
||
(kill-local-variable (car variable)))))))
|
||
;; No connection-local variables to apply.
|
||
,@body))
|
||
|
||
;;;###autoload
|
||
(defun path-separator ()
|
||
"The connection-local value of `path-separator'."
|
||
(with-connection-local-variables path-separator))
|
||
|
||
;;;###autoload
|
||
(defun null-device ()
|
||
"The connection-local value of `null-device'."
|
||
(with-connection-local-variables null-device))
|
||
|
||
|
||
|
||
(provide 'files-x)
|
||
|
||
;;; files-x.el ends here
|