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36fd8e17 | 1 | ;;; shadowfile.el --- automatic file copying |
bb5d4e1a | 2 | |
41c4dfe1 | 3 | ;; Copyright (C) 1993, 1994, 2001, 2002 Free Software Foundation, Inc. |
bb5d4e1a | 4 | |
5762abec | 5 | ;; Author: Boris Goldowsky <boris@gnu.org> |
36fd8e17 | 6 | ;; Keywords: comm files |
be010748 RS |
7 | |
8 | ;; This file is part of GNU Emacs. | |
9 | ||
10 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
11 | ;; it under the terms of the GNU General Public License as published by | |
12 | ;; the Free Software Foundation; either version 2, or (at your option) | |
13 | ;; any later version. | |
14 | ||
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | ;; Boston, MA 02111-1307, USA. | |
bb5d4e1a | 24 | |
36fd8e17 | 25 | ;;; Commentary: |
bb5d4e1a | 26 | |
b578f267 EN |
27 | ;; This package helps you to keep identical copies of files in more than one |
28 | ;; place - possibly on different machines. When you save a file, it checks | |
29 | ;; whether it is on the list of files with "shadows", and if so, it tries to | |
30 | ;; copy it when you exit emacs (or use the shadow-copy-files command). | |
bb5d4e1a | 31 | |
b578f267 EN |
32 | ;; Installation & Use: |
33 | ||
36fd8e17 | 34 | ;; Add clusters (if necessary) and file groups with shadow-define-cluster, |
b578f267 | 35 | ;; shadow-define-literal-group, and shadow-define-regexp-group (see the |
36fd8e17 DL |
36 | ;; documentation for these functions for information on how and when to use |
37 | ;; them). After doing this once, everything should be automatic. | |
b578f267 EN |
38 | |
39 | ;; The lists of clusters and shadows are saved in a file called .shadows, | |
40 | ;; so that they can be remembered from one emacs session to another, even | |
41 | ;; (as much as possible) if the emacs session terminates abnormally. The | |
42 | ;; files needing to be copied are stored in .shadow_todo; if a file cannot | |
43 | ;; be copied for any reason, it will stay on the list to be tried again | |
44 | ;; next time. The .shadows file should itself have shadows on all your | |
45 | ;; accounts so that the information in it is consistent everywhere, but | |
46 | ;; .shadow_todo is local information and should have no shadows. | |
47 | ||
48 | ;; If you do not want to copy a particular file, you can answer "no" and | |
49 | ;; be asked again next time you hit C-x 4 s or exit emacs. If you do not | |
50 | ;; want to be asked again, use shadow-cancel, and you will not be asked | |
51 | ;; until you change the file and save it again. If you do not want to | |
52 | ;; shadow that file ever again, you can edit it out of the .shadows | |
53 | ;; buffer. Anytime you edit the .shadows buffer, you must type M-x | |
54 | ;; shadow-read-files to load in the new information, or your changes will | |
55 | ;; be overwritten! | |
56 | ||
57 | ;; Bugs & Warnings: | |
58 | ;; | |
59 | ;; - It is bad to have two emacses both running shadowfile at the same | |
60 | ;; time. It tries to detect this condition, but is not always successful. | |
61 | ;; | |
62 | ;; - You have to be careful not to edit a file in two locations | |
63 | ;; before shadowfile has had a chance to copy it; otherwise | |
64 | ;; "updating shadows" will overwrite one of the changed versions. | |
65 | ;; | |
66 | ;; - It ought to check modification times of both files to make sure | |
67 | ;; it is doing the right thing. This will have to wait until | |
68 | ;; file-newer-than-file-p works between machines. | |
69 | ;; | |
70 | ;; - It will not make directories for you, it just fails to copy files | |
71 | ;; that belong in non-existent directories. | |
72 | ;; | |
5762abec | 73 | ;; Please report any bugs to me (boris@gnu.org). Also let me know |
b578f267 | 74 | ;; if you have suggestions or would like to be informed of updates. |
bb5d4e1a | 75 | |
36fd8e17 | 76 | |
bb5d4e1a RS |
77 | ;;; Code: |
78 | ||
bb5d4e1a RS |
79 | (require 'ange-ftp) |
80 | ||
bb5d4e1a RS |
81 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
82 | ;;; Variables | |
83 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
84 | ||
4bef9110 SE |
85 | (defgroup shadow nil |
86 | "Automatic file copying when saving a file." | |
87 | :prefix "shadow-" | |
36fd8e17 | 88 | :link '(emacs-commentary-link "shadowfile") |
4bef9110 SE |
89 | :group 'files) |
90 | ||
91 | (defcustom shadow-noquery nil | |
191b14ba RS |
92 | "*If t, always copy shadow files without asking. |
93 | If nil \(the default), always ask. If not nil and not t, ask only if there | |
4bef9110 | 94 | is no buffer currently visiting the file." |
a62e9680 | 95 | :type '(choice (const t) (const nil) (other :tag "Ask if no buffer" maybe)) |
4bef9110 | 96 | :group 'shadow) |
bb5d4e1a | 97 | |
4bef9110 SE |
98 | (defcustom shadow-inhibit-message nil |
99 | "*If nonnil, do not display a message when a file needs copying." | |
100 | :type 'boolean | |
101 | :group 'shadow) | |
bb5d4e1a | 102 | |
4bef9110 | 103 | (defcustom shadow-inhibit-overload nil |
36fd8e17 | 104 | "If nonnil, shadowfile won't redefine \\[save-buffers-kill-emacs]. |
bb5d4e1a | 105 | Normally it overloads the function `save-buffers-kill-emacs' to check |
4bef9110 SE |
106 | for files have been changed and need to be copied to other systems." |
107 | :type 'boolean | |
108 | :group 'shadow) | |
bb5d4e1a | 109 | |
4bef9110 | 110 | (defcustom shadow-info-file nil |
36fd8e17 DL |
111 | "File to keep shadow information in. |
112 | The `shadow-info-file' should be shadowed to all your accounts to | |
4bef9110 SE |
113 | ensure consistency. Default: ~/.shadows" |
114 | :type '(choice (const nil) file) | |
115 | :group 'shadow) | |
bb5d4e1a | 116 | |
4bef9110 | 117 | (defcustom shadow-todo-file nil |
bb5d4e1a RS |
118 | "File to store the list of uncopied shadows in. |
119 | This means that if a remote system is down, or for any reason you cannot or | |
36fd8e17 DL |
120 | decide not to copy your shadow files at the end of one Emacs session, it will |
121 | remember and ask you again in your next Emacs session. | |
bb5d4e1a | 122 | This file must NOT be shadowed to any other system, it is host-specific. |
4bef9110 SE |
123 | Default: ~/.shadow_todo" |
124 | :type '(choice (const nil) file) | |
125 | :group 'shadow) | |
126 | ||
bb5d4e1a RS |
127 | |
128 | ;;; The following two variables should in most cases initialize themselves | |
129 | ;;; correctly. They are provided as variables in case the defaults are wrong | |
130 | ;;; on your machine \(and for efficiency). | |
131 | ||
132 | (defvar shadow-system-name (system-name) | |
133 | "The complete hostname of this machine.") | |
134 | ||
135 | (defvar shadow-homedir nil | |
136 | "Your home directory on this machine.") | |
137 | ||
138 | ;;; | |
139 | ;;; Internal variables whose values are stored in the info and todo files: | |
140 | ;;; | |
141 | ||
142 | (defvar shadow-clusters nil | |
36fd8e17 | 143 | "List of host clusters \(see `shadow-define-cluster').") |
bb5d4e1a RS |
144 | |
145 | (defvar shadow-literal-groups nil | |
146 | "List of files that are shared between hosts. | |
147 | This list contains shadow structures with literal filenames, created by | |
148 | shadow-define-group.") | |
149 | ||
150 | (defvar shadow-regexp-groups nil | |
151 | "List of file types that are shared between hosts. | |
36fd8e17 DL |
152 | This list contains shadow structures with regexps matching filenames, |
153 | created by `shadow-define-regexp-group'.") | |
bb5d4e1a RS |
154 | |
155 | ;;; | |
156 | ;;; Other internal variables: | |
157 | ;;; | |
158 | ||
159 | (defvar shadow-files-to-copy nil) ; List of files that need to | |
160 | ; be copied to remote hosts. | |
161 | ||
162 | (defvar shadow-hashtable nil) ; for speed | |
163 | ||
164 | (defvar shadow-info-buffer nil) ; buf visiting shadow-info-file | |
165 | (defvar shadow-todo-buffer nil) ; buf visiting shadow-todo-file | |
166 | ||
167 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
168 | ;;; Syntactic sugar; General list and string manipulation | |
169 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
170 | ||
bb5d4e1a | 171 | (defun shadow-union (a b) |
36fd8e17 | 172 | "Add members of list A to list B if not equal to items already in B." |
bb5d4e1a RS |
173 | (if (null a) |
174 | b | |
175 | (if (member (car a) b) | |
176 | (shadow-union (cdr a) b) | |
177 | (shadow-union (cdr a) (cons (car a) b))))) | |
178 | ||
179 | (defun shadow-find (func list) | |
36fd8e17 | 180 | "If FUNC applied to some element of LIST is nonnil, return first such element." |
bb5d4e1a RS |
181 | (while (and list (not (funcall func (car list)))) |
182 | (setq list (cdr list))) | |
183 | (car list)) | |
184 | ||
185 | (defun shadow-remove-if (func list) | |
186 | "Remove elements satisfying FUNC from LIST. | |
187 | Nondestructive; actually returns a copy of the list with the elements removed." | |
188 | (if list | |
189 | (if (funcall func (car list)) | |
190 | (shadow-remove-if func (cdr list)) | |
191 | (cons (car list) (shadow-remove-if func (cdr list)))) | |
192 | nil)) | |
193 | ||
194 | (defun shadow-join (strings sep) | |
195 | "Concatenate elements of the list of STRINGS with SEP between each." | |
196 | (cond ((null strings) "") | |
197 | ((null (cdr strings)) (car strings)) | |
198 | ((concat (car strings) " " (shadow-join (cdr strings) sep))))) | |
199 | ||
200 | (defun shadow-regexp-superquote (string) | |
36fd8e17 DL |
201 | "Like `regexp-quote', but includes the ^ and $. |
202 | This makes sure regexp matches nothing but STRING." | |
bb5d4e1a RS |
203 | (concat "^" (regexp-quote string) "$")) |
204 | ||
205 | (defun shadow-suffix (prefix string) | |
206 | "If PREFIX begins STRING, return the rest. | |
207 | Return value is nonnil if PREFIX and STRING are string= up to the length of | |
208 | PREFIX." | |
209 | (let ((lp (length prefix)) | |
210 | (ls (length string))) | |
211 | (if (and (>= ls lp) | |
212 | (string= prefix (substring string 0 lp))) | |
213 | (substring string lp)))) | |
214 | ||
215 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
216 | ;;; Clusters and sites | |
217 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
218 | ||
219 | ;;; I use the term `site' to refer to a string which may be the name of a | |
220 | ;;; cluster or a literal hostname. All user-level commands should accept | |
221 | ;;; either. | |
222 | ||
223 | (defun shadow-make-cluster (name primary regexp) | |
36fd8e17 DL |
224 | "Create a shadow cluster. |
225 | It is called NAME, uses the PRIMARY hostname and REGEXP matching all | |
226 | hosts in the cluster. The variable `shadow-clusters' associates the | |
227 | names of clusters to these structures. This function is for program | |
228 | use: to create clusters interactively, use `shadow-define-cluster' | |
229 | instead." | |
bb5d4e1a RS |
230 | (list name primary regexp)) |
231 | ||
232 | (defmacro shadow-cluster-name (cluster) | |
233 | "Return the name of the CLUSTER." | |
234 | (list 'elt cluster 0)) | |
235 | ||
236 | (defmacro shadow-cluster-primary (cluster) | |
237 | "Return the primary hostname of a CLUSTER." | |
238 | (list 'elt cluster 1)) | |
239 | ||
240 | (defmacro shadow-cluster-regexp (cluster) | |
241 | "Return the regexp matching hosts in a CLUSTER." | |
242 | (list 'elt cluster 2)) | |
243 | ||
244 | (defun shadow-set-cluster (name primary regexp) | |
36fd8e17 DL |
245 | "Put cluster NAME on the list of clusters. |
246 | Replace old definition, if any. PRIMARY and REGEXP are the | |
bb5d4e1a | 247 | information defining the cluster. For interactive use, call |
36fd8e17 | 248 | `shadow-define-cluster' instead." |
bb5d4e1a RS |
249 | (let ((rest (shadow-remove-if |
250 | (function (lambda (x) (equal name (car x)))) | |
251 | shadow-clusters))) | |
36fd8e17 | 252 | (setq shadow-clusters |
bb5d4e1a RS |
253 | (cons (shadow-make-cluster name primary regexp) |
254 | rest)))) | |
255 | ||
256 | (defmacro shadow-get-cluster (name) | |
257 | "Return cluster named NAME, or nil." | |
258 | (list 'assoc name 'shadow-clusters)) | |
259 | ||
260 | (defun shadow-site-primary (site) | |
261 | "If SITE is a cluster, return primary host, otherwise return SITE." | |
262 | (let ((c (shadow-get-cluster site))) | |
263 | (if c | |
264 | (shadow-cluster-primary c) | |
265 | site))) | |
266 | ||
267 | ;;; SITES | |
268 | ||
269 | (defun shadow-site-cluster (site) | |
36fd8e17 | 270 | "Given a SITE \(hostname or cluster name), return cluster it is in, or nil." |
bb5d4e1a RS |
271 | (or (assoc site shadow-clusters) |
272 | (shadow-find | |
273 | (function (lambda (x) | |
274 | (string-match (shadow-cluster-regexp x) | |
275 | site))) | |
276 | shadow-clusters))) | |
277 | ||
278 | (defun shadow-read-site () | |
279 | "Read a cluster name or hostname from the minibuffer." | |
280 | (let ((ans (completing-read "Host or cluster name [RET when done]: " | |
281 | shadow-clusters))) | |
282 | (if (equal "" ans) | |
283 | nil | |
284 | ans))) | |
285 | ||
286 | (defun shadow-site-match (site1 site2) | |
36fd8e17 | 287 | "Nonnil iff SITE1 is or includes SITE2. |
bb5d4e1a RS |
288 | Each may be a host or cluster name; if they are clusters, regexp of site1 will |
289 | be matched against the primary of site2." | |
290 | (or (string-equal site1 site2) ; quick check | |
291 | (let* ((cluster1 (shadow-get-cluster site1)) | |
292 | (primary2 (shadow-site-primary site2))) | |
293 | (if cluster1 | |
294 | (string-match (shadow-cluster-regexp cluster1) primary2) | |
295 | (string-equal site1 primary2))))) | |
296 | ||
297 | (defun shadow-get-user (site) | |
36fd8e17 | 298 | "Return the default username for a SITE." |
bb5d4e1a RS |
299 | (ange-ftp-get-user (shadow-site-primary site))) |
300 | ||
301 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
302 | ;;; Filename manipulation | |
303 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
304 | ||
5354cb6d RS |
305 | (defun shadow-parse-fullname (fullname) |
306 | "Parse FULLNAME into \(site user path) list. | |
36fd8e17 DL |
307 | Leave it alone if it already is one. Returns nil if the argument is |
308 | not a full ange-ftp pathname." | |
5354cb6d RS |
309 | (if (listp fullname) |
310 | fullname | |
311 | (ange-ftp-ftp-name fullname))) | |
312 | ||
313 | (defun shadow-parse-name (name) | |
314 | "Parse any NAME into \(site user name) list. | |
315 | Argument can be a simple name, full ange-ftp name, or already a hup list." | |
316 | (or (shadow-parse-fullname name) | |
bb5d4e1a RS |
317 | (list shadow-system-name |
318 | (user-login-name) | |
5354cb6d | 319 | name))) |
bb5d4e1a | 320 | |
5354cb6d RS |
321 | (defsubst shadow-make-fullname (host user name) |
322 | "Make an ange-ftp style fullname out of HOST, USER (optional), and NAME. | |
bb5d4e1a | 323 | This is probably not as general as it ought to be." |
36fd8e17 | 324 | (concat "/" |
bb5d4e1a RS |
325 | (if user (concat user "@")) |
326 | host ":" | |
5354cb6d | 327 | name)) |
bb5d4e1a | 328 | |
5354cb6d RS |
329 | (defun shadow-replace-name-component (fullname newname) |
330 | "Return FULLNAME with the name component changed to NEWNAME." | |
331 | (let ((hup (shadow-parse-fullname fullname))) | |
332 | (shadow-make-fullname (nth 0 hup) (nth 1 hup) newname))) | |
bb5d4e1a RS |
333 | |
334 | (defun shadow-local-file (file) | |
36fd8e17 DL |
335 | "If FILE is at this site, remove /user@host part. |
336 | If refers to a different system or a different user on this system, | |
337 | return nil." | |
5354cb6d | 338 | (let ((hup (shadow-parse-fullname file))) |
bb5d4e1a RS |
339 | (cond ((null hup) file) |
340 | ((and (shadow-site-match (nth 0 hup) shadow-system-name) | |
341 | (string-equal (nth 1 hup) (user-login-name))) | |
342 | (nth 2 hup)) | |
343 | (t nil)))) | |
344 | ||
345 | (defun shadow-expand-cluster-in-file-name (file) | |
36fd8e17 | 346 | "If hostname part of FILE is a cluster, expand it to cluster's primary hostname. |
5354cb6d RS |
347 | Will return the name bare if it is a local file." |
348 | (let ((hup (shadow-parse-name file)) | |
bb5d4e1a RS |
349 | cluster) |
350 | (cond ((null hup) file) | |
351 | ((shadow-local-file hup)) | |
5354cb6d | 352 | ((shadow-make-fullname (shadow-site-primary (nth 0 hup)) |
bb5d4e1a RS |
353 | (nth 1 hup) |
354 | (nth 2 hup)))))) | |
355 | ||
356 | (defun shadow-expand-file-name (file &optional default) | |
357 | "Expand file name and get file's true name." | |
358 | (file-truename (expand-file-name file default))) | |
359 | ||
360 | (defun shadow-contract-file-name (file) | |
36fd8e17 DL |
361 | "Simplify FILE. |
362 | Do so by replacing (when possible) home directory with ~, and hostname | |
363 | with cluster name that includes it. Filename should be absolute and | |
364 | true." | |
5354cb6d | 365 | (let* ((hup (shadow-parse-name file)) |
bb5d4e1a RS |
366 | (homedir (if (shadow-local-file hup) |
367 | shadow-homedir | |
368 | (file-name-as-directory | |
5354cb6d | 369 | (nth 2 (shadow-parse-fullname |
bb5d4e1a | 370 | (expand-file-name |
5354cb6d | 371 | (shadow-make-fullname |
bb5d4e1a RS |
372 | (nth 0 hup) (nth 1 hup) "~"))))))) |
373 | (suffix (shadow-suffix homedir (nth 2 hup))) | |
374 | (cluster (shadow-site-cluster (nth 0 hup)))) | |
5354cb6d | 375 | (shadow-make-fullname |
bb5d4e1a RS |
376 | (if cluster |
377 | (shadow-cluster-name cluster) | |
378 | (nth 0 hup)) | |
379 | (nth 1 hup) | |
36fd8e17 | 380 | (if suffix |
bb5d4e1a RS |
381 | (concat "~/" suffix) |
382 | (nth 2 hup))))) | |
383 | ||
384 | (defun shadow-same-site (pattern file) | |
385 | "True if the site of PATTERN and of FILE are on the same site. | |
386 | If usernames are supplied, they must also match exactly. PATTERN and FILE may | |
5354cb6d | 387 | be lists of host, user, name, or ange-ftp file names. FILE may also be just a |
bb5d4e1a | 388 | local filename." |
5354cb6d RS |
389 | (let ((pattern-sup (shadow-parse-fullname pattern)) |
390 | (file-sup (shadow-parse-name file))) | |
bb5d4e1a RS |
391 | (and |
392 | (shadow-site-match (nth 0 pattern-sup) (nth 0 file-sup)) | |
393 | (or (null (nth 1 pattern-sup)) | |
394 | (string-equal (nth 1 pattern-sup) (nth 1 file-sup)))))) | |
395 | ||
396 | (defun shadow-file-match (pattern file &optional regexp) | |
36fd8e17 | 397 | "Return t if PATTERN matches FILE. |
5354cb6d | 398 | If REGEXP is supplied and non-nil, the file part of the pattern is a regular |
bb5d4e1a RS |
399 | expression, otherwise it must match exactly. The sites and usernames must |
400 | match---see shadow-same-site. The pattern must be in full ange-ftp format, but | |
401 | the file can be any valid filename. This function does not do any filename | |
402 | expansion or contraction, you must do that yourself first." | |
5354cb6d RS |
403 | (let* ((pattern-sup (shadow-parse-fullname pattern)) |
404 | (file-sup (shadow-parse-name file))) | |
bb5d4e1a | 405 | (and (shadow-same-site pattern-sup file-sup) |
36fd8e17 | 406 | (if regexp |
bb5d4e1a RS |
407 | (string-match (nth 2 pattern-sup) (nth 2 file-sup)) |
408 | (string-equal (nth 2 pattern-sup) (nth 2 file-sup)))))) | |
f1180544 | 409 | |
bb5d4e1a RS |
410 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
411 | ;;; User-level Commands | |
412 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
413 | ||
36fd8e17 | 414 | ;;;###autoload |
bb5d4e1a | 415 | (defun shadow-define-cluster (name) |
36fd8e17 | 416 | "Edit \(or create) the definition of a cluster NAME. |
bb5d4e1a RS |
417 | This is a group of hosts that share directories, so that copying to or from |
418 | one of them is sufficient to update the file on all of them. Clusters are | |
419 | defined by a name, the network address of a primary host \(the one we copy | |
420 | files to), and a regular expression that matches the hostnames of all the sites | |
421 | in the cluster." | |
422 | (interactive (list (completing-read "Cluster name: " shadow-clusters () ()))) | |
423 | (let* ((old (shadow-get-cluster name)) | |
424 | (primary (read-string "Primary host: " | |
36fd8e17 | 425 | (if old (shadow-cluster-primary old) |
bb5d4e1a RS |
426 | name))) |
427 | (regexp (let (try-regexp) | |
428 | (while (not | |
36fd8e17 | 429 | (string-match |
bb5d4e1a | 430 | (setq try-regexp |
36fd8e17 | 431 | (read-string |
bb5d4e1a RS |
432 | "Regexp matching all host names: " |
433 | (if old (shadow-cluster-regexp old) | |
434 | (shadow-regexp-superquote primary)))) | |
435 | primary)) | |
436 | (message "Regexp doesn't include the primary host!") | |
437 | (sit-for 2)) | |
438 | try-regexp)) | |
36fd8e17 DL |
439 | ; (username (read-no-blanks-input |
440 | ; (format "Username [default: %s]: " | |
bb5d4e1a RS |
441 | ; (shadow-get-user primary)) |
442 | ; (if old (or (shadow-cluster-username old) "") | |
443 | ; (user-login-name)))) | |
444 | ) | |
445 | ; (if (string-equal "" username) (setq username nil)) | |
446 | (shadow-set-cluster name primary regexp))) | |
447 | ||
36fd8e17 | 448 | ;;;###autoload |
bb5d4e1a RS |
449 | (defun shadow-define-literal-group () |
450 | "Declare a single file to be shared between sites. | |
451 | It may have different filenames on each site. When this file is edited, the | |
452 | new version will be copied to each of the other locations. Sites can be | |
36fd8e17 | 453 | specific hostnames, or names of clusters \(see `shadow-define-cluster')." |
bb5d4e1a | 454 | (interactive) |
5354cb6d | 455 | (let* ((hup (shadow-parse-fullname |
bb5d4e1a | 456 | (shadow-contract-file-name (buffer-file-name)))) |
5354cb6d | 457 | (name (nth 2 hup)) |
bb5d4e1a RS |
458 | user site group) |
459 | (while (setq site (shadow-read-site)) | |
460 | (setq user (read-string (format "Username [default %s]: " | |
461 | (shadow-get-user site))) | |
5354cb6d RS |
462 | name (read-string "Filename: " name)) |
463 | (setq group (cons (shadow-make-fullname site | |
bb5d4e1a RS |
464 | (if (string-equal "" user) |
465 | (shadow-get-user site) | |
466 | user) | |
5354cb6d | 467 | name) |
bb5d4e1a RS |
468 | group))) |
469 | (setq shadow-literal-groups (cons group shadow-literal-groups))) | |
470 | (shadow-write-info-file)) | |
471 | ||
36fd8e17 | 472 | ;;;###autoload |
bb5d4e1a RS |
473 | (defun shadow-define-regexp-group () |
474 | "Make each of a group of files be shared between hosts. | |
475 | Prompts for regular expression; files matching this are shared between a list | |
36fd8e17 | 476 | of sites, which are also prompted for. The filenames must be identical on all |
bb5d4e1a RS |
477 | hosts \(if they aren't, use shadow-define-group instead of this function). |
478 | Each site can be either a hostname or the name of a cluster \(see | |
36fd8e17 | 479 | `shadow-define-cluster')." |
bb5d4e1a | 480 | (interactive) |
36fd8e17 DL |
481 | (let ((regexp (read-string |
482 | "Filename regexp: " | |
bb5d4e1a RS |
483 | (if (buffer-file-name) |
484 | (shadow-regexp-superquote | |
485 | (nth 2 | |
5354cb6d | 486 | (shadow-parse-name |
bb5d4e1a RS |
487 | (shadow-contract-file-name |
488 | (buffer-file-name)))))))) | |
489 | site sites usernames) | |
490 | (while (setq site (shadow-read-site)) | |
491 | (setq sites (cons site sites)) | |
36fd8e17 | 492 | (setq usernames |
bb5d4e1a RS |
493 | (cons (read-string (format "Username for %s: " site) |
494 | (shadow-get-user site)) | |
495 | usernames))) | |
36fd8e17 | 496 | (setq shadow-regexp-groups |
bb5d4e1a RS |
497 | (cons (shadow-make-group regexp sites usernames) |
498 | shadow-regexp-groups)) | |
499 | (shadow-write-info-file))) | |
f1180544 | 500 | |
bb5d4e1a RS |
501 | (defun shadow-shadows () |
502 | ;; Mostly for debugging. | |
503 | "Interactive function to display shadows of a buffer." | |
504 | (interactive) | |
505 | (let ((msg (shadow-join (mapcar (function cdr) | |
506 | (shadow-shadows-of (buffer-file-name))) | |
507 | " "))) | |
673dac20 | 508 | (message "%s" |
36fd8e17 | 509 | (if (zerop (length msg)) |
bb5d4e1a RS |
510 | "No shadows." |
511 | msg)))) | |
512 | ||
513 | (defun shadow-copy-files (&optional arg) | |
514 | "Copy all pending shadow files. | |
515 | With prefix argument, copy all pending files without query. | |
36fd8e17 DL |
516 | Pending copies are stored in variable `shadow-files-to-copy', and in |
517 | `shadow-todo-file' if necessary. This function is invoked by | |
518 | `shadow-save-buffers-kill-emacs', so it is not usually necessary to | |
bb5d4e1a RS |
519 | call it manually." |
520 | (interactive "P") | |
521 | (if (and (not shadow-files-to-copy) (interactive-p)) | |
522 | (message "No files need to be shadowed.") | |
523 | (save-excursion | |
524 | (map-y-or-n-p (function | |
525 | (lambda (pair) | |
191b14ba | 526 | (or arg shadow-noquery |
bb5d4e1a RS |
527 | (format "Copy shadow file %s? " (cdr pair))))) |
528 | (function shadow-copy-file) | |
529 | shadow-files-to-copy | |
530 | '("shadow" "shadows" "copy")) | |
531 | (shadow-write-todo-file t)))) | |
532 | ||
533 | (defun shadow-cancel () | |
534 | "Cancel the instruction to copy some files. | |
535 | Prompts for which copy operations to cancel. You will not be asked to copy | |
536 | them again, unless you make more changes to the files. To cancel a shadow | |
36fd8e17 DL |
537 | permanently, remove the group from `shadow-literal-groups' or |
538 | `shadow-regexp-groups'." | |
bb5d4e1a RS |
539 | (interactive) |
540 | (map-y-or-n-p (function (lambda (pair) | |
36fd8e17 | 541 | (format "Cancel copying %s to %s? " |
bb5d4e1a | 542 | (car pair) (cdr pair)))) |
36fd8e17 | 543 | (function (lambda (pair) |
bb5d4e1a RS |
544 | (shadow-remove-from-todo pair))) |
545 | shadow-files-to-copy | |
546 | '("shadow" "shadows" "cancel copy")) | |
36fd8e17 | 547 | (message "There are %d shadows to be updated." |
673dac20 | 548 | (length shadow-files-to-copy)) |
bb5d4e1a RS |
549 | (shadow-write-todo-file)) |
550 | ||
551 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
552 | ;;; Internal functions | |
553 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
554 | ||
555 | (defun shadow-make-group (regexp sites usernames) | |
36fd8e17 | 556 | "Make a description of a file group--- |
bb5d4e1a RS |
557 | actually a list of regexp ange-ftp file names---from REGEXP \(name of file to |
558 | be shadowed), list of SITES, and corresponding list of USERNAMES for each | |
559 | site." | |
560 | (if sites | |
5354cb6d | 561 | (cons (shadow-make-fullname (car sites) (car usernames) regexp) |
bb5d4e1a RS |
562 | (shadow-make-group regexp (cdr sites) (cdr usernames))) |
563 | nil)) | |
564 | ||
565 | (defun shadow-copy-file (s) | |
566 | "Copy one shadow file." | |
36fd8e17 DL |
567 | (let* ((buffer |
568 | (cond ((get-file-buffer | |
191b14ba | 569 | (abbreviate-file-name (shadow-expand-file-name (car s))))) |
bb5d4e1a RS |
570 | ((not (file-readable-p (car s))) |
571 | (if (y-or-n-p | |
36fd8e17 | 572 | (format "Cannot find file %s--cancel copy request? " |
bb5d4e1a RS |
573 | (car s))) |
574 | (shadow-remove-from-todo s)) | |
575 | nil) | |
191b14ba | 576 | ((or (eq t shadow-noquery) |
36fd8e17 DL |
577 | (y-or-n-p |
578 | (format "No buffer for %s -- update shadow anyway? " | |
191b14ba | 579 | (car s)))) |
bb5d4e1a RS |
580 | (find-file-noselect (car s))))) |
581 | (to (shadow-expand-cluster-in-file-name (cdr s)))) | |
5a7b9024 | 582 | (when buffer |
bb5d4e1a RS |
583 | (set-buffer buffer) |
584 | (save-restriction | |
585 | (widen) | |
36fd8e17 | 586 | (condition-case i |
bb5d4e1a RS |
587 | (progn |
588 | (write-region (point-min) (point-max) to) | |
589 | (shadow-remove-from-todo s)) | |
673dac20 | 590 | (error (message "Shadow %s not updated!" (cdr s)))))))) |
bb5d4e1a RS |
591 | |
592 | (defun shadow-shadows-of (file) | |
36fd8e17 DL |
593 | "Return copy operations needed to update FILE. |
594 | Filename should have clusters expanded, but otherwise can have any format. | |
bb5d4e1a RS |
595 | Return value is a list of dotted pairs like \(from . to), where from |
596 | and to are absolute file names." | |
597 | (or (symbol-value (intern-soft file shadow-hashtable)) | |
598 | (let* ((absolute-file (shadow-expand-file-name | |
599 | (or (shadow-local-file file) file) | |
600 | shadow-homedir)) | |
601 | (canonical-file (shadow-contract-file-name absolute-file)) | |
36fd8e17 | 602 | (shadows |
bb5d4e1a RS |
603 | (mapcar (function (lambda (shadow) |
604 | (cons absolute-file shadow))) | |
605 | (append | |
606 | (shadow-shadows-of-1 | |
607 | canonical-file shadow-literal-groups nil) | |
608 | (shadow-shadows-of-1 | |
609 | canonical-file shadow-regexp-groups t))))) | |
610 | (set (intern file shadow-hashtable) shadows)))) | |
611 | ||
612 | (defun shadow-shadows-of-1 (file groups regexp) | |
36fd8e17 DL |
613 | "Return list of FILE's shadows in GROUPS. |
614 | Consider them as regular expressions if third arg REGEXP is true." | |
bb5d4e1a RS |
615 | (if groups |
616 | (let ((nonmatching | |
36fd8e17 | 617 | (shadow-remove-if |
bb5d4e1a RS |
618 | (function (lambda (x) (shadow-file-match x file regexp))) |
619 | (car groups)))) | |
620 | (append (cond ((equal nonmatching (car groups)) nil) | |
36fd8e17 | 621 | (regexp |
5354cb6d | 622 | (let ((realname (nth 2 (shadow-parse-fullname file)))) |
36fd8e17 DL |
623 | (mapcar |
624 | (function | |
625 | (lambda (x) | |
5354cb6d | 626 | (shadow-replace-name-component x realname))) |
bb5d4e1a RS |
627 | nonmatching))) |
628 | (t nonmatching)) | |
629 | (shadow-shadows-of-1 file (cdr groups) regexp))))) | |
630 | ||
631 | (defun shadow-add-to-todo () | |
36fd8e17 DL |
632 | "If current buffer has shadows, add them to the list needing to be copied." |
633 | (let ((shadows (shadow-shadows-of | |
634 | (shadow-expand-file-name | |
bb5d4e1a | 635 | (buffer-file-name (current-buffer)))))) |
5a7b9024 | 636 | (when shadows |
bb5d4e1a RS |
637 | (setq shadow-files-to-copy |
638 | (shadow-union shadows shadow-files-to-copy)) | |
5a7b9024 | 639 | (when (not shadow-inhibit-message) |
673dac20 KH |
640 | (message "%s" (substitute-command-keys |
641 | "Use \\[shadow-copy-files] to update shadows.")) | |
bb5d4e1a RS |
642 | (sit-for 1)) |
643 | (shadow-write-todo-file))) | |
644 | nil) ; Return nil for write-file-hooks | |
645 | ||
646 | (defun shadow-remove-from-todo (pair) | |
36fd8e17 | 647 | "Remove PAIR from `shadow-files-to-copy'. |
bb5d4e1a | 648 | PAIR must be (eq to) one of the elements of that list." |
36fd8e17 | 649 | (setq shadow-files-to-copy |
bb5d4e1a RS |
650 | (shadow-remove-if (function (lambda (s) (eq s pair))) |
651 | shadow-files-to-copy))) | |
652 | ||
653 | (defun shadow-read-files () | |
36fd8e17 DL |
654 | "Visit and load `shadow-info-file' and `shadow-todo-file'. |
655 | Thus restores shadowfile's state from your last Emacs session. | |
bb5d4e1a RS |
656 | Returns t unless files were locked; then returns nil." |
657 | (interactive) | |
191b14ba RS |
658 | (if (and (fboundp 'file-locked-p) |
659 | (or (stringp (file-locked-p shadow-info-file)) | |
660 | (stringp (file-locked-p shadow-todo-file)))) | |
bb5d4e1a RS |
661 | (progn |
662 | (message "Shadowfile is running in another emacs; can't have two.") | |
663 | (beep) | |
664 | (sit-for 3) | |
665 | nil) | |
666 | (save-excursion | |
5a7b9024 | 667 | (when shadow-info-file |
bb5d4e1a RS |
668 | (set-buffer (setq shadow-info-buffer |
669 | (find-file-noselect shadow-info-file))) | |
5a7b9024 GM |
670 | (when (and (not (buffer-modified-p)) |
671 | (file-newer-than-file-p (make-auto-save-file-name) | |
672 | shadow-info-file)) | |
bb5d4e1a | 673 | (erase-buffer) |
36fd8e17 | 674 | (message "Data recovered from %s." |
bb5d4e1a RS |
675 | (car (insert-file-contents (make-auto-save-file-name)))) |
676 | (sit-for 1)) | |
677 | (eval-current-buffer)) | |
5a7b9024 | 678 | (when shadow-todo-file |
36fd8e17 | 679 | (set-buffer (setq shadow-todo-buffer |
bb5d4e1a | 680 | (find-file-noselect shadow-todo-file))) |
5a7b9024 GM |
681 | (when (and (not (buffer-modified-p)) |
682 | (file-newer-than-file-p (make-auto-save-file-name) | |
683 | shadow-todo-file)) | |
bb5d4e1a | 684 | (erase-buffer) |
36fd8e17 | 685 | (message "Data recovered from %s." |
bb5d4e1a RS |
686 | (car (insert-file-contents (make-auto-save-file-name)))) |
687 | (sit-for 1)) | |
688 | (eval-current-buffer nil)) | |
689 | (shadow-invalidate-hashtable)) | |
690 | t)) | |
691 | ||
692 | (defun shadow-write-info-file () | |
36fd8e17 DL |
693 | "Write out information to `shadow-info-file'. |
694 | Also clear `shadow-hashtable', since when there are new shadows | |
695 | defined, the old hashtable info is invalid." | |
bb5d4e1a RS |
696 | (shadow-invalidate-hashtable) |
697 | (if shadow-info-file | |
698 | (save-excursion | |
699 | (if (not shadow-info-buffer) | |
700 | (setq shadow-info-buffer (find-file-noselect shadow-info-file))) | |
701 | (set-buffer shadow-info-buffer) | |
702 | (delete-region (point-min) (point-max)) | |
703 | (shadow-insert-var 'shadow-clusters) | |
704 | (shadow-insert-var 'shadow-literal-groups) | |
705 | (shadow-insert-var 'shadow-regexp-groups)))) | |
706 | ||
707 | (defun shadow-write-todo-file (&optional save) | |
36fd8e17 | 708 | "Write out information to shadow-todo-file. |
bb5d4e1a RS |
709 | With nonnil argument also saves the buffer." |
710 | (save-excursion | |
711 | (if (not shadow-todo-buffer) | |
712 | (setq shadow-todo-buffer (find-file-noselect shadow-todo-file))) | |
713 | (set-buffer shadow-todo-buffer) | |
714 | (delete-region (point-min) (point-max)) | |
715 | (shadow-insert-var 'shadow-files-to-copy) | |
716 | (if save (shadow-save-todo-file)))) | |
717 | ||
718 | (defun shadow-save-todo-file () | |
719 | (if (and shadow-todo-buffer (buffer-modified-p shadow-todo-buffer)) | |
720 | (save-excursion | |
721 | (set-buffer shadow-todo-buffer) | |
36fd8e17 | 722 | (condition-case nil ; have to continue even in case of |
bb5d4e1a RS |
723 | (basic-save-buffer) ; error, otherwise kill-emacs might |
724 | (error ; not work! | |
725 | (message "WARNING: Can't save shadow todo file; it is locked!") | |
726 | (sit-for 1)))))) | |
727 | ||
728 | (defun shadow-invalidate-hashtable () | |
729 | (setq shadow-hashtable (make-vector 37 0))) | |
730 | ||
731 | (defun shadow-insert-var (variable) | |
732 | "Prettily insert a setq command for VARIABLE. | |
733 | which, when later evaluated, will restore it to its current setting. | |
734 | SYMBOL must be the name of a variable whose value is a list." | |
735 | (let ((standard-output (current-buffer))) | |
736 | (insert (format "(setq %s" variable)) | |
737 | (cond ((consp (eval variable)) | |
36fd8e17 | 738 | (insert "\n '(") |
bb5d4e1a RS |
739 | (prin1 (car (eval variable))) |
740 | (let ((rest (cdr (eval variable)))) | |
741 | (while rest | |
742 | (insert "\n ") | |
743 | (prin1 (car rest)) | |
744 | (setq rest (cdr rest))) | |
745 | (insert "))\n\n"))) | |
746 | (t (insert " ") | |
747 | (prin1 (eval variable)) | |
748 | (insert ")\n\n"))))) | |
749 | ||
750 | (defun shadow-save-buffers-kill-emacs (&optional arg) | |
751 | "Offer to save each buffer and copy shadows, then kill this Emacs process. | |
752 | With prefix arg, silently save all file-visiting buffers, then kill. | |
753 | ||
754 | Extended by shadowfile to automatically save `shadow-todo-file' and | |
755 | look for files that have been changed and need to be copied to other systems." | |
756 | ;; This function is necessary because we need to get control and save | |
757 | ;; the todo file /after/ saving other files, but /before/ the warning | |
758 | ;; message about unsaved buffers (because it can get modified by the | |
759 | ;; action of saving other buffers). `kill-emacs-hook' is no good | |
760 | ;; because it is not called at the correct time, and also because it is | |
761 | ;; called when the terminal is disconnected and we cannot ask whether | |
762 | ;; to copy files. | |
763 | (interactive "P") | |
764 | (shadow-save-todo-file) | |
765 | (save-some-buffers arg t) | |
766 | (shadow-copy-files) | |
767 | (shadow-save-todo-file) | |
768 | (and (or (not (memq t (mapcar (function | |
769 | (lambda (buf) (and (buffer-file-name buf) | |
770 | (buffer-modified-p buf)))) | |
771 | (buffer-list)))) | |
772 | (yes-or-no-p "Modified buffers exist; exit anyway? ")) | |
773 | (or (not (fboundp 'process-list)) | |
774 | ;; process-list is not defined on VMS. | |
775 | (let ((processes (process-list)) | |
776 | active) | |
777 | (while processes | |
41c4dfe1 KS |
778 | (and (memq (process-status (car processes)) '(run stop open listen)) |
779 | (process-query-on-exit-flag (car processes)) | |
bb5d4e1a RS |
780 | (setq active t)) |
781 | (setq processes (cdr processes))) | |
782 | (or (not active) | |
783 | (yes-or-no-p "Active processes exist; kill them and exit anyway? ")))) | |
784 | (kill-emacs))) | |
785 | ||
786 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
36fd8e17 | 787 | ;;; Lucid Emacs compatibility |
bb5d4e1a RS |
788 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
789 | ||
191b14ba RS |
790 | ;; This is on hold until someone tells me about a working version of |
791 | ;; map-ynp for Lucid Emacs. | |
792 | ||
5a7b9024 | 793 | ;(when (string-match "Lucid" emacs-version) |
191b14ba RS |
794 | ; (require 'symlink-fix) |
795 | ; (require 'ange-ftp) | |
796 | ; (require 'map-ynp) | |
797 | ; (if (not (fboundp 'file-truename)) | |
36fd8e17 | 798 | ; (fset 'shadow-expand-file-name |
191b14ba RS |
799 | ; (symbol-function 'symlink-expand-file-name))) |
800 | ; (if (not (fboundp 'ange-ftp-ftp-name)) | |
801 | ; (fset 'ange-ftp-ftp-name | |
5354cb6d | 802 | ; (symbol-function 'ange-ftp-ftp-name)))) |
bb5d4e1a RS |
803 | |
804 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
805 | ;;; Hook us up | |
806 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
807 | ||
36fd8e17 | 808 | ;;;###autoload |
bb5d4e1a | 809 | (defun shadow-initialize () |
36fd8e17 DL |
810 | "Set up file shadowing." |
811 | (interactive) | |
bb5d4e1a RS |
812 | (if (null shadow-homedir) |
813 | (setq shadow-homedir | |
814 | (file-name-as-directory (shadow-expand-file-name "~")))) | |
815 | (if (null shadow-info-file) | |
36fd8e17 | 816 | (setq shadow-info-file |
bb5d4e1a RS |
817 | (shadow-expand-file-name "~/.shadows"))) |
818 | (if (null shadow-todo-file) | |
36fd8e17 | 819 | (setq shadow-todo-file |
bb5d4e1a RS |
820 | (shadow-expand-file-name "~/.shadow_todo"))) |
821 | (if (not (shadow-read-files)) | |
822 | (progn | |
823 | (message "Shadowfile information files not found - aborting") | |
824 | (beep) | |
825 | (sit-for 3)) | |
5a7b9024 GM |
826 | (when (and (not shadow-inhibit-overload) |
827 | (not (fboundp 'shadow-orig-save-buffers-kill-emacs))) | |
36fd8e17 DL |
828 | (defalias 'shadow-orig-save-buffers-kill-emacs |
829 | (symbol-function 'save-buffers-kill-emacs)) | |
830 | (defalias 'save-buffers-kill-emacs 'shadow-save-buffers-kill-emacs)) | |
bb5d4e1a RS |
831 | (add-hook 'write-file-hooks 'shadow-add-to-todo) |
832 | (define-key ctl-x-4-map "s" 'shadow-copy-files))) | |
833 | ||
36fd8e17 DL |
834 | (defun shadowfile-unload-hook () |
835 | (if (fboundp 'shadow-orig-save-buffers-kill-emacs) | |
836 | (fset 'save-buffers-kill-emacs | |
837 | (symbol-function 'shadow-orig-save-buffers-kill-emacs))) | |
838 | (remove-hook 'write-file-hooks 'shadow-add-to-todo)) | |
839 | ||
a6d23706 RS |
840 | (add-hook 'shadowfile-unload-hook 'shadowfile-unload-hook) |
841 | ||
36fd8e17 DL |
842 | (provide 'shadowfile) |
843 | ||
ab5796a9 | 844 | ;;; arch-tag: e2f4cdd7-2bab-4def-9130-9e69b412b79e |
bb5d4e1a | 845 | ;;; shadowfile.el ends here |