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- ;;; shadowfile.el --- automatic file copying for Emacs 19
-
- ;; Copyright (C) 1993, 1994 Free Software Foundation, Inc.
-
- ;; Author: Boris Goldowsky <boris@gnu.ai.mit.edu>
- ;; Keywords: comm
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 2, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; GNU General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs; see the file COPYING. If not, write to the
- ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;; LCD Archive Entry:
- ;; shadowfile|Boris Goldowsky|boris@gnu.ai.mit.edu|
- ;; Helps you keep identical copies of files in multiple places.|
- ;; $Date: 1996/01/25 01:16:55 $ |$Revision: 1.8 $|~/misc/shadowfile.el.Z|
-
- ;; Commentary:
-
- ;; This package helps you to keep identical copies of files in more than one
- ;; place - possibly on different machines. When you save a file, it checks
- ;; whether it is on the list of files with "shadows", and if so, it tries to
- ;; copy it when you exit emacs (or use the shadow-copy-files command).
-
- ;; Installation & Use:
-
- ;; Put (require 'shadowfile) in your .emacs; add clusters (if necessary)
- ;; and file groups with shadow-define-cluster,
- ;; shadow-define-literal-group, and shadow-define-regexp-group (see the
- ;; documentation for these functions for information on how and when to
- ;; use them). After doing this once, everything should be automatic.
-
- ;; The lists of clusters and shadows are saved in a file called .shadows,
- ;; so that they can be remembered from one emacs session to another, even
- ;; (as much as possible) if the emacs session terminates abnormally. The
- ;; files needing to be copied are stored in .shadow_todo; if a file cannot
- ;; be copied for any reason, it will stay on the list to be tried again
- ;; next time. The .shadows file should itself have shadows on all your
- ;; accounts so that the information in it is consistent everywhere, but
- ;; .shadow_todo is local information and should have no shadows.
-
- ;; If you do not want to copy a particular file, you can answer "no" and
- ;; be asked again next time you hit C-x 4 s or exit emacs. If you do not
- ;; want to be asked again, use shadow-cancel, and you will not be asked
- ;; until you change the file and save it again. If you do not want to
- ;; shadow that file ever again, you can edit it out of the .shadows
- ;; buffer. Anytime you edit the .shadows buffer, you must type M-x
- ;; shadow-read-files to load in the new information, or your changes will
- ;; be overwritten!
-
- ;; Bugs & Warnings:
- ;;
- ;; - It is bad to have two emacses both running shadowfile at the same
- ;; time. It tries to detect this condition, but is not always successful.
- ;;
- ;; - You have to be careful not to edit a file in two locations
- ;; before shadowfile has had a chance to copy it; otherwise
- ;; "updating shadows" will overwrite one of the changed versions.
- ;;
- ;; - It ought to check modification times of both files to make sure
- ;; it is doing the right thing. This will have to wait until
- ;; file-newer-than-file-p works between machines.
- ;;
- ;; - It will not make directories for you, it just fails to copy files
- ;; that belong in non-existent directories.
- ;;
- ;; Please report any bugs to me (boris@gnu.ai.mit.edu). Also let me know
- ;; if you have suggestions or would like to be informed of updates.
-
- ;;; Code:
-
- (provide 'shadowfile)
- (require 'ange-ftp)
-
- (setq find-file-visit-truename t) ; makes life easier with symbolic links
-
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;;; Variables
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
- (defvar shadow-noquery nil
- "*If t, always copy shadow files without asking.
- If nil \(the default), always ask. If not nil and not t, ask only if there
- is no buffer currently visiting the file.")
-
- (defvar shadow-inhibit-message nil
- "*If nonnil, do not display a message when a file needs copying.")
-
- (defvar shadow-inhibit-overload nil
- "If nonnil, shadowfile won't redefine C-x C-c.
- Normally it overloads the function `save-buffers-kill-emacs' to check
- for files have been changed and need to be copied to other systems.")
-
- (defvar shadow-info-file nil
- "File to keep shadow information in.
- The shadow-info-file should be shadowed to all your accounts to
- ensure consistency. Default: ~/.shadows")
-
- (defvar shadow-todo-file nil
- "File to store the list of uncopied shadows in.
- This means that if a remote system is down, or for any reason you cannot or
- decide not to copy your shadow files at the end of one emacs session, it will
- remember and ask you again in your next emacs session.
- This file must NOT be shadowed to any other system, it is host-specific.
- Default: ~/.shadow_todo")
-
- ;;; The following two variables should in most cases initialize themselves
- ;;; correctly. They are provided as variables in case the defaults are wrong
- ;;; on your machine \(and for efficiency).
-
- (defvar shadow-system-name (system-name)
- "The complete hostname of this machine.")
-
- (defvar shadow-homedir nil
- "Your home directory on this machine.")
-
- ;;;
- ;;; Internal variables whose values are stored in the info and todo files:
- ;;;
-
- (defvar shadow-clusters nil
- "List of host clusters \(see shadow-define-cluster).")
-
- (defvar shadow-literal-groups nil
- "List of files that are shared between hosts.
- This list contains shadow structures with literal filenames, created by
- shadow-define-group.")
-
- (defvar shadow-regexp-groups nil
- "List of file types that are shared between hosts.
- This list contains shadow structures with regexps matching filenames,
- created by shadow-define-regexp-group.")
-
- ;;;
- ;;; Other internal variables:
- ;;;
-
- (defvar shadow-files-to-copy nil) ; List of files that need to
- ; be copied to remote hosts.
-
- (defvar shadow-hashtable nil) ; for speed
-
- (defvar shadow-info-buffer nil) ; buf visiting shadow-info-file
- (defvar shadow-todo-buffer nil) ; buf visiting shadow-todo-file
-
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;;; Syntactic sugar; General list and string manipulation
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
- (defmacro shadow-when (condition &rest body)
- ;; From cl.el
- "(shadow-when CONDITION . BODY) => evaluate BODY if CONDITION is true."
- (` (if (not (, condition)) () (,@ body))))
-
- (defun shadow-union (a b)
- "Add members of list A to list B
- if they are not equal to items already in B."
- (if (null a)
- b
- (if (member (car a) b)
- (shadow-union (cdr a) b)
- (shadow-union (cdr a) (cons (car a) b)))))
-
- (defun shadow-find (func list)
- "If FUNC applied to some element of LIST is nonnil,
- return the first such element."
- (while (and list (not (funcall func (car list))))
- (setq list (cdr list)))
- (car list))
-
- (defun shadow-remove-if (func list)
- "Remove elements satisfying FUNC from LIST.
- Nondestructive; actually returns a copy of the list with the elements removed."
- (if list
- (if (funcall func (car list))
- (shadow-remove-if func (cdr list))
- (cons (car list) (shadow-remove-if func (cdr list))))
- nil))
-
- (defun shadow-join (strings sep)
- "Concatenate elements of the list of STRINGS with SEP between each."
- (cond ((null strings) "")
- ((null (cdr strings)) (car strings))
- ((concat (car strings) " " (shadow-join (cdr strings) sep)))))
-
- (defun shadow-regexp-superquote (string)
- "Like regexp-quote, but includes the ^ and $
- to make sure regexp matches nothing but STRING."
- (concat "^" (regexp-quote string) "$"))
-
- (defun shadow-suffix (prefix string)
- "If PREFIX begins STRING, return the rest.
- Return value is nonnil if PREFIX and STRING are string= up to the length of
- PREFIX."
- (let ((lp (length prefix))
- (ls (length string)))
- (if (and (>= ls lp)
- (string= prefix (substring string 0 lp)))
- (substring string lp))))
-
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;;; Clusters and sites
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
- ;;; I use the term `site' to refer to a string which may be the name of a
- ;;; cluster or a literal hostname. All user-level commands should accept
- ;;; either.
-
- (defun shadow-make-cluster (name primary regexp)
- "Creates a shadow cluster
- called NAME, using the PRIMARY hostname, REGEXP matching all hosts in the
- cluster. The variable shadow-clusters associates the names of clusters to
- these structures.
- This function is for program use: to create clusters interactively, use
- shadow-define-cluster instead."
- (list name primary regexp))
-
- (defmacro shadow-cluster-name (cluster)
- "Return the name of the CLUSTER."
- (list 'elt cluster 0))
-
- (defmacro shadow-cluster-primary (cluster)
- "Return the primary hostname of a CLUSTER."
- (list 'elt cluster 1))
-
- (defmacro shadow-cluster-regexp (cluster)
- "Return the regexp matching hosts in a CLUSTER."
- (list 'elt cluster 2))
-
- (defun shadow-set-cluster (name primary regexp)
- "Put cluster NAME on the list of clusters,
- replacing old definition if any. PRIMARY and REGEXP are the
- information defining the cluster. For interactive use, call
- shadow-define-cluster instead."
- (let ((rest (shadow-remove-if
- (function (lambda (x) (equal name (car x))))
- shadow-clusters)))
- (setq shadow-clusters
- (cons (shadow-make-cluster name primary regexp)
- rest))))
-
- (defmacro shadow-get-cluster (name)
- "Return cluster named NAME, or nil."
- (list 'assoc name 'shadow-clusters))
-
- (defun shadow-site-primary (site)
- "If SITE is a cluster, return primary host, otherwise return SITE."
- (let ((c (shadow-get-cluster site)))
- (if c
- (shadow-cluster-primary c)
- site)))
-
- ;;; SITES
-
- (defun shadow-site-cluster (site)
- "Given a SITE \(hostname or cluster name), return the cluster
- that it is in, or nil."
- (or (assoc site shadow-clusters)
- (shadow-find
- (function (lambda (x)
- (string-match (shadow-cluster-regexp x)
- site)))
- shadow-clusters)))
-
- (defun shadow-read-site ()
- "Read a cluster name or hostname from the minibuffer."
- (let ((ans (completing-read "Host or cluster name [RET when done]: "
- shadow-clusters)))
- (if (equal "" ans)
- nil
- ans)))
-
- (defun shadow-site-match (site1 site2)
- "Nonnil iff SITE1 is or includes SITE2.
- Each may be a host or cluster name; if they are clusters, regexp of site1 will
- be matched against the primary of site2."
- (or (string-equal site1 site2) ; quick check
- (let* ((cluster1 (shadow-get-cluster site1))
- (primary2 (shadow-site-primary site2)))
- (if cluster1
- (string-match (shadow-cluster-regexp cluster1) primary2)
- (string-equal site1 primary2)))))
-
- (defun shadow-get-user (site)
- "Returns the default username for a site."
- (ange-ftp-get-user (shadow-site-primary site)))
-
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;;; Filename manipulation
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
- (defun shadow-parse-fullpath (fullpath)
- "Parse PATH into \(site user path) list,
- or leave it alone if it already is one. Returns nil if the argument is not a
- full ange-ftp pathname."
- (if (listp fullpath)
- fullpath
- (ange-ftp-ftp-name fullpath)))
-
- (defun shadow-parse-path (path)
- "Parse any PATH into \(site user path) list.
- Argument can be a simple path, full ange-ftp path, or already a hup list."
- (or (shadow-parse-fullpath path)
- (list shadow-system-name
- (user-login-name)
- path)))
-
- (defsubst shadow-make-fullpath (host user path)
- "Make an ange-ftp style fullpath out of HOST, USER (optional), and PATH.
- This is probably not as general as it ought to be."
- (concat "/"
- (if user (concat user "@"))
- host ":"
- path))
-
- (defun shadow-replace-path-component (fullpath newpath)
- "Return FULLPATH with the pathname component changed to NEWPATH."
- (let ((hup (shadow-parse-fullpath fullpath)))
- (shadow-make-fullpath (nth 0 hup) (nth 1 hup) newpath)))
-
- (defun shadow-local-file (file)
- "If FILENAME is at this site,
- remove /user@host part. If refers to a different system or a different user on
- this system, return nil."
- (let ((hup (shadow-parse-fullpath file)))
- (cond ((null hup) file)
- ((and (shadow-site-match (nth 0 hup) shadow-system-name)
- (string-equal (nth 1 hup) (user-login-name)))
- (nth 2 hup))
- (t nil))))
-
- (defun shadow-expand-cluster-in-file-name (file)
- "If hostname part of FILE is a cluster, expand it
- into the cluster's primary hostname. Will return the pathname bare if it is
- a local file."
- (let ((hup (shadow-parse-path file))
- cluster)
- (cond ((null hup) file)
- ((shadow-local-file hup))
- ((shadow-make-fullpath (shadow-site-primary (nth 0 hup))
- (nth 1 hup)
- (nth 2 hup))))))
-
- (defun shadow-expand-file-name (file &optional default)
- "Expand file name and get file's true name."
- (file-truename (expand-file-name file default)))
-
- (defun shadow-contract-file-name (file)
- "Simplify FILENAME
- by replacing (when possible) home directory with ~, and hostname with cluster
- name that includes it. Filename should be absolute and true."
- (let* ((hup (shadow-parse-path file))
- (homedir (if (shadow-local-file hup)
- shadow-homedir
- (file-name-as-directory
- (nth 2 (shadow-parse-fullpath
- (expand-file-name
- (shadow-make-fullpath
- (nth 0 hup) (nth 1 hup) "~")))))))
- (suffix (shadow-suffix homedir (nth 2 hup)))
- (cluster (shadow-site-cluster (nth 0 hup))))
- (shadow-make-fullpath
- (if cluster
- (shadow-cluster-name cluster)
- (nth 0 hup))
- (nth 1 hup)
- (if suffix
- (concat "~/" suffix)
- (nth 2 hup)))))
-
- (defun shadow-same-site (pattern file)
- "True if the site of PATTERN and of FILE are on the same site.
- If usernames are supplied, they must also match exactly. PATTERN and FILE may
- be lists of host, user, path, or ange-ftp pathnames. FILE may also be just a
- local filename."
- (let ((pattern-sup (shadow-parse-fullpath pattern))
- (file-sup (shadow-parse-path file)))
- (and
- (shadow-site-match (nth 0 pattern-sup) (nth 0 file-sup))
- (or (null (nth 1 pattern-sup))
- (string-equal (nth 1 pattern-sup) (nth 1 file-sup))))))
-
- (defun shadow-file-match (pattern file &optional regexp)
- "Returns t if PATTERN matches FILE.
- If REGEXP is supplied and nonnil, the pathname part of the pattern is a regular
- expression, otherwise it must match exactly. The sites and usernames must
- match---see shadow-same-site. The pattern must be in full ange-ftp format, but
- the file can be any valid filename. This function does not do any filename
- expansion or contraction, you must do that yourself first."
- (let* ((pattern-sup (shadow-parse-fullpath pattern))
- (file-sup (shadow-parse-path file)))
- (and (shadow-same-site pattern-sup file-sup)
- (if regexp
- (string-match (nth 2 pattern-sup) (nth 2 file-sup))
- (string-equal (nth 2 pattern-sup) (nth 2 file-sup))))))
-
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;;; User-level Commands
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
- (defun shadow-define-cluster (name)
- "Edit \(or create) the definition of a cluster.
- This is a group of hosts that share directories, so that copying to or from
- one of them is sufficient to update the file on all of them. Clusters are
- defined by a name, the network address of a primary host \(the one we copy
- files to), and a regular expression that matches the hostnames of all the sites
- in the cluster."
- (interactive (list (completing-read "Cluster name: " shadow-clusters () ())))
- (let* ((old (shadow-get-cluster name))
- (primary (read-string "Primary host: "
- (if old (shadow-cluster-primary old)
- name)))
- (regexp (let (try-regexp)
- (while (not
- (string-match
- (setq try-regexp
- (read-string
- "Regexp matching all host names: "
- (if old (shadow-cluster-regexp old)
- (shadow-regexp-superquote primary))))
- primary))
- (message "Regexp doesn't include the primary host!")
- (sit-for 2))
- try-regexp))
- ; (username (read-no-blanks-input
- ; (format "Username [default: %s]: "
- ; (shadow-get-user primary))
- ; (if old (or (shadow-cluster-username old) "")
- ; (user-login-name))))
- )
- ; (if (string-equal "" username) (setq username nil))
- (shadow-set-cluster name primary regexp)))
-
- (defun shadow-define-literal-group ()
- "Declare a single file to be shared between sites.
- It may have different filenames on each site. When this file is edited, the
- new version will be copied to each of the other locations. Sites can be
- specific hostnames, or names of clusters \(see shadow-define-cluster)."
- (interactive)
- (let* ((hup (shadow-parse-fullpath
- (shadow-contract-file-name (buffer-file-name))))
- (path (nth 2 hup))
- user site group)
- (while (setq site (shadow-read-site))
- (setq user (read-string (format "Username [default %s]: "
- (shadow-get-user site)))
- path (read-string "Filename: " path))
- (setq group (cons (shadow-make-fullpath site
- (if (string-equal "" user)
- (shadow-get-user site)
- user)
- path)
- group)))
- (setq shadow-literal-groups (cons group shadow-literal-groups)))
- (shadow-write-info-file))
-
- (defun shadow-define-regexp-group ()
- "Make each of a group of files be shared between hosts.
- Prompts for regular expression; files matching this are shared between a list
- of sites, which are also prompted for. The filenames must be identical on all
- hosts \(if they aren't, use shadow-define-group instead of this function).
- Each site can be either a hostname or the name of a cluster \(see
- shadow-define-cluster)."
- (interactive)
- (let ((regexp (read-string
- "Filename regexp: "
- (if (buffer-file-name)
- (shadow-regexp-superquote
- (nth 2
- (shadow-parse-path
- (shadow-contract-file-name
- (buffer-file-name))))))))
- site sites usernames)
- (while (setq site (shadow-read-site))
- (setq sites (cons site sites))
- (setq usernames
- (cons (read-string (format "Username for %s: " site)
- (shadow-get-user site))
- usernames)))
- (setq shadow-regexp-groups
- (cons (shadow-make-group regexp sites usernames)
- shadow-regexp-groups))
- (shadow-write-info-file)))
-
- (defun shadow-shadows ()
- ;; Mostly for debugging.
- "Interactive function to display shadows of a buffer."
- (interactive)
- (let ((msg (shadow-join (mapcar (function cdr)
- (shadow-shadows-of (buffer-file-name)))
- " ")))
- (message "%s"
- (if (zerop (length msg))
- "No shadows."
- msg))))
-
- (defun shadow-copy-files (&optional arg)
- "Copy all pending shadow files.
- With prefix argument, copy all pending files without query.
- Pending copies are stored in variable shadow-files-to-copy, and in
- shadow-todo-file if necessary. This function is invoked by
- shadow-save-buffers-kill-emacs, so it is not usually necessary to
- call it manually."
- (interactive "P")
- (if (and (not shadow-files-to-copy) (interactive-p))
- (message "No files need to be shadowed.")
- (save-excursion
- (map-y-or-n-p (function
- (lambda (pair)
- (or arg shadow-noquery
- (format "Copy shadow file %s? " (cdr pair)))))
- (function shadow-copy-file)
- shadow-files-to-copy
- '("shadow" "shadows" "copy"))
- (shadow-write-todo-file t))))
-
- (defun shadow-cancel ()
- "Cancel the instruction to copy some files.
- Prompts for which copy operations to cancel. You will not be asked to copy
- them again, unless you make more changes to the files. To cancel a shadow
- permanently, remove the group from shadow-literal-groups or
- shadow-regexp-groups."
- (interactive)
- (map-y-or-n-p (function (lambda (pair)
- (format "Cancel copying %s to %s? "
- (car pair) (cdr pair))))
- (function (lambda (pair)
- (shadow-remove-from-todo pair)))
- shadow-files-to-copy
- '("shadow" "shadows" "cancel copy"))
- (message "There are %d shadows to be updated."
- (length shadow-files-to-copy))
- (shadow-write-todo-file))
-
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;;; Internal functions
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
- (defun shadow-make-group (regexp sites usernames)
- "Makes a description of a file group---
- actually a list of regexp ange-ftp file names---from REGEXP \(name of file to
- be shadowed), list of SITES, and corresponding list of USERNAMES for each
- site."
- (if sites
- (cons (shadow-make-fullpath (car sites) (car usernames) regexp)
- (shadow-make-group regexp (cdr sites) (cdr usernames)))
- nil))
-
- (defun shadow-copy-file (s)
- "Copy one shadow file."
- (let* ((buffer
- (cond ((get-file-buffer
- (abbreviate-file-name (shadow-expand-file-name (car s)))))
- ((not (file-readable-p (car s)))
- (if (y-or-n-p
- (format "Cannot find file %s--cancel copy request?"
- (car s)))
- (shadow-remove-from-todo s))
- nil)
- ((or (eq t shadow-noquery)
- (y-or-n-p
- (format "No buffer for %s -- update shadow anyway?"
- (car s))))
- (find-file-noselect (car s)))))
- (to (shadow-expand-cluster-in-file-name (cdr s))))
- (shadow-when buffer
- (set-buffer buffer)
- (save-restriction
- (widen)
- (condition-case i
- (progn
- (write-region (point-min) (point-max) to)
- (shadow-remove-from-todo s))
- (error (message "Shadow %s not updated!" (cdr s))))))))
-
- (defun shadow-shadows-of (file)
- "Returns copy operations needed to update FILE.
- Filename should have clusters expanded, but otherwise can have any format.
- Return value is a list of dotted pairs like \(from . to), where from
- and to are absolute file names."
- (or (symbol-value (intern-soft file shadow-hashtable))
- (let* ((absolute-file (shadow-expand-file-name
- (or (shadow-local-file file) file)
- shadow-homedir))
- (canonical-file (shadow-contract-file-name absolute-file))
- (shadows
- (mapcar (function (lambda (shadow)
- (cons absolute-file shadow)))
- (append
- (shadow-shadows-of-1
- canonical-file shadow-literal-groups nil)
- (shadow-shadows-of-1
- canonical-file shadow-regexp-groups t)))))
- (set (intern file shadow-hashtable) shadows))))
-
- (defun shadow-shadows-of-1 (file groups regexp)
- "Return list of FILE's shadows in GROUPS,
- which are considered as regular expressions if third arg REGEXP is true."
- (if groups
- (let ((nonmatching
- (shadow-remove-if
- (function (lambda (x) (shadow-file-match x file regexp)))
- (car groups))))
- (append (cond ((equal nonmatching (car groups)) nil)
- (regexp
- (let ((realpath (nth 2 (shadow-parse-fullpath file))))
- (mapcar
- (function
- (lambda (x)
- (shadow-replace-path-component x realpath)))
- nonmatching)))
- (t nonmatching))
- (shadow-shadows-of-1 file (cdr groups) regexp)))))
-
- (defun shadow-add-to-todo ()
- "If current buffer has shadows, add them to the list
- of files needing to be copied."
- (let ((shadows (shadow-shadows-of
- (shadow-expand-file-name
- (buffer-file-name (current-buffer))))))
- (shadow-when shadows
- (setq shadow-files-to-copy
- (shadow-union shadows shadow-files-to-copy))
- (shadow-when (not shadow-inhibit-message)
- (message "%s" (substitute-command-keys
- "Use \\[shadow-copy-files] to update shadows."))
- (sit-for 1))
- (shadow-write-todo-file)))
- nil) ; Return nil for write-file-hooks
-
- (defun shadow-remove-from-todo (pair)
- "Remove PAIR from shadow-files-to-copy.
- PAIR must be (eq to) one of the elements of that list."
- (setq shadow-files-to-copy
- (shadow-remove-if (function (lambda (s) (eq s pair)))
- shadow-files-to-copy)))
-
- (defun shadow-read-files ()
- "Visits and loads shadow-info-file and shadow-todo-file,
- thus restoring shadowfile's state from your last emacs session.
- Returns t unless files were locked; then returns nil."
- (interactive)
- (if (and (fboundp 'file-locked-p)
- (or (stringp (file-locked-p shadow-info-file))
- (stringp (file-locked-p shadow-todo-file))))
- (progn
- (message "Shadowfile is running in another emacs; can't have two.")
- (beep)
- (sit-for 3)
- nil)
- (save-excursion
- (shadow-when shadow-info-file
- (set-buffer (setq shadow-info-buffer
- (find-file-noselect shadow-info-file)))
- (shadow-when (and (not (buffer-modified-p))
- (file-newer-than-file-p (make-auto-save-file-name)
- shadow-info-file))
- (erase-buffer)
- (message "Data recovered from %s."
- (car (insert-file-contents (make-auto-save-file-name))))
- (sit-for 1))
- (eval-current-buffer))
- (shadow-when shadow-todo-file
- (set-buffer (setq shadow-todo-buffer
- (find-file-noselect shadow-todo-file)))
- (shadow-when (and (not (buffer-modified-p))
- (file-newer-than-file-p (make-auto-save-file-name)
- shadow-todo-file))
- (erase-buffer)
- (message "Data recovered from %s."
- (car (insert-file-contents (make-auto-save-file-name))))
- (sit-for 1))
- (eval-current-buffer nil))
- (shadow-invalidate-hashtable))
- t))
-
- (defun shadow-write-info-file ()
- "Write out information to shadow-info-file.
- Also clears shadow-hashtable, since when there are new shadows defined, the old
- hashtable info is invalid."
- (shadow-invalidate-hashtable)
- (if shadow-info-file
- (save-excursion
- (if (not shadow-info-buffer)
- (setq shadow-info-buffer (find-file-noselect shadow-info-file)))
- (set-buffer shadow-info-buffer)
- (delete-region (point-min) (point-max))
- (shadow-insert-var 'shadow-clusters)
- (shadow-insert-var 'shadow-literal-groups)
- (shadow-insert-var 'shadow-regexp-groups))))
-
- (defun shadow-write-todo-file (&optional save)
- "Write out information to shadow-todo-file.
- With nonnil argument also saves the buffer."
- (save-excursion
- (if (not shadow-todo-buffer)
- (setq shadow-todo-buffer (find-file-noselect shadow-todo-file)))
- (set-buffer shadow-todo-buffer)
- (delete-region (point-min) (point-max))
- (shadow-insert-var 'shadow-files-to-copy)
- (if save (shadow-save-todo-file))))
-
- (defun shadow-save-todo-file ()
- (if (and shadow-todo-buffer (buffer-modified-p shadow-todo-buffer))
- (save-excursion
- (set-buffer shadow-todo-buffer)
- (condition-case nil ; have to continue even in case of
- (basic-save-buffer) ; error, otherwise kill-emacs might
- (error ; not work!
- (message "WARNING: Can't save shadow todo file; it is locked!")
- (sit-for 1))))))
-
- (defun shadow-invalidate-hashtable ()
- (setq shadow-hashtable (make-vector 37 0)))
-
- (defun shadow-insert-var (variable)
- "Prettily insert a setq command for VARIABLE.
- which, when later evaluated, will restore it to its current setting.
- SYMBOL must be the name of a variable whose value is a list."
- (let ((standard-output (current-buffer)))
- (insert (format "(setq %s" variable))
- (cond ((consp (eval variable))
- (insert "\n '(")
- (prin1 (car (eval variable)))
- (let ((rest (cdr (eval variable))))
- (while rest
- (insert "\n ")
- (prin1 (car rest))
- (setq rest (cdr rest)))
- (insert "))\n\n")))
- (t (insert " ")
- (prin1 (eval variable))
- (insert ")\n\n")))))
-
- (defun shadow-save-buffers-kill-emacs (&optional arg)
- "Offer to save each buffer and copy shadows, then kill this Emacs process.
- With prefix arg, silently save all file-visiting buffers, then kill.
-
- Extended by shadowfile to automatically save `shadow-todo-file' and
- look for files that have been changed and need to be copied to other systems."
- ;; This function is necessary because we need to get control and save
- ;; the todo file /after/ saving other files, but /before/ the warning
- ;; message about unsaved buffers (because it can get modified by the
- ;; action of saving other buffers). `kill-emacs-hook' is no good
- ;; because it is not called at the correct time, and also because it is
- ;; called when the terminal is disconnected and we cannot ask whether
- ;; to copy files.
- (interactive "P")
- (shadow-save-todo-file)
- (save-some-buffers arg t)
- (shadow-copy-files)
- (shadow-save-todo-file)
- (and (or (not (memq t (mapcar (function
- (lambda (buf) (and (buffer-file-name buf)
- (buffer-modified-p buf))))
- (buffer-list))))
- (yes-or-no-p "Modified buffers exist; exit anyway? "))
- (or (not (fboundp 'process-list))
- ;; process-list is not defined on VMS.
- (let ((processes (process-list))
- active)
- (while processes
- (and (memq (process-status (car processes)) '(run stop open))
- (let ((val (process-kill-without-query (car processes))))
- (process-kill-without-query (car processes) val)
- val)
- (setq active t))
- (setq processes (cdr processes)))
- (or (not active)
- (yes-or-no-p "Active processes exist; kill them and exit anyway? "))))
- (kill-emacs)))
-
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;;; Lucid Emacs compatibility
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
- ;; This is on hold until someone tells me about a working version of
- ;; map-ynp for Lucid Emacs.
-
- ;(shadow-when (string-match "Lucid" emacs-version)
- ; (require 'symlink-fix)
- ; (require 'ange-ftp)
- ; (require 'map-ynp)
- ; (if (not (fboundp 'file-truename))
- ; (fset 'shadow-expand-file-name
- ; (symbol-function 'symlink-expand-file-name)))
- ; (if (not (fboundp 'ange-ftp-ftp-name))
- ; (fset 'ange-ftp-ftp-name
- ; (symbol-function 'ange-ftp-ftp-path))))
-
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;;; Hook us up
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
- ;;; File shadowing is activated at load time, unless this this file is
- ;;; being preloaded, in which case it is added to after-init-hook.
- ;;; Thanks to Richard Caley for this scheme.
-
- (defun shadow-initialize ()
- (if (null shadow-homedir)
- (setq shadow-homedir
- (file-name-as-directory (shadow-expand-file-name "~"))))
- (if (null shadow-info-file)
- (setq shadow-info-file
- (shadow-expand-file-name "~/.shadows")))
- (if (null shadow-todo-file)
- (setq shadow-todo-file
- (shadow-expand-file-name "~/.shadow_todo")))
- (if (not (shadow-read-files))
- (progn
- (message "Shadowfile information files not found - aborting")
- (beep)
- (sit-for 3))
- (shadow-when (and (not shadow-inhibit-overload)
- (not (fboundp 'shadow-orig-save-buffers-kill-emacs)))
- (fset 'shadow-orig-save-buffers-kill-emacs
- (symbol-function 'save-buffers-kill-emacs))
- (fset 'save-buffers-kill-emacs
- (symbol-function 'shadow-save-buffers-kill-emacs)))
- (add-hook 'write-file-hooks 'shadow-add-to-todo)
- (define-key ctl-x-4-map "s" 'shadow-copy-files)))
-
- (if noninteractive
- (add-hook 'after-init-hook 'shadow-initialize)
- (shadow-initialize))
-
- ;;;Local Variables:
- ;;;eval:(put 'shadow-when 'lisp-indent-hook 1)
- ;;;End:
-
- ;;; shadowfile.el ends here
-