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36fd8e17 | 1 | ;;; shadowfile.el --- automatic file copying |
bb5d4e1a | 2 | |
ba318903 | 3 | ;; Copyright (C) 1993-1994, 2001-2014 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 | ||
eb3fa2cf | 10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
be010748 | 11 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
12 | ;; the Free Software Foundation, either version 3 of the License, or |
13 | ;; (at your option) any later version. | |
be010748 RS |
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 | |
eb3fa2cf | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
bb5d4e1a | 22 | |
36fd8e17 | 23 | ;;; Commentary: |
bb5d4e1a | 24 | |
b578f267 EN |
25 | ;; This package helps you to keep identical copies of files in more than one |
26 | ;; place - possibly on different machines. When you save a file, it checks | |
27 | ;; whether it is on the list of files with "shadows", and if so, it tries to | |
32f389a4 | 28 | ;; copy it when you exit Emacs (or use the shadow-copy-files command). |
bb5d4e1a | 29 | |
b578f267 EN |
30 | ;; Installation & Use: |
31 | ||
36fd8e17 | 32 | ;; Add clusters (if necessary) and file groups with shadow-define-cluster, |
b578f267 | 33 | ;; shadow-define-literal-group, and shadow-define-regexp-group (see the |
36fd8e17 DL |
34 | ;; documentation for these functions for information on how and when to use |
35 | ;; them). After doing this once, everything should be automatic. | |
b578f267 | 36 | |
ece4bae5 GM |
37 | ;; The lists of clusters and shadows are saved in a ~/.emacs.d/shadows |
38 | ;; (`shadow-info-file') file, so that they can be remembered from one | |
39 | ;; Emacs session to another, even (as much as possible) if the Emacs | |
40 | ;; session terminates abnormally. The files needing to be copied are | |
41 | ;; stored in `shadow-todo-file'; if a file cannot be copied for any | |
42 | ;; reason, it will stay on the list to be tried again next time. The | |
43 | ;; `shadow-info-file' file should itself have shadows on all your accounts | |
44 | ;; so that the information in it is consistent everywhere, but | |
45 | ;; `shadow-todo-file' is local information and should have no shadows. | |
b578f267 EN |
46 | |
47 | ;; If you do not want to copy a particular file, you can answer "no" and | |
32f389a4 | 48 | ;; be asked again next time you hit C-x 4 s or exit Emacs. If you do not |
b578f267 EN |
49 | ;; want to be asked again, use shadow-cancel, and you will not be asked |
50 | ;; until you change the file and save it again. If you do not want to | |
ece4bae5 GM |
51 | ;; shadow that file ever again, you can edit it out of the shadows |
52 | ;; buffer. Anytime you edit the shadows buffer, you must type M-x | |
b578f267 EN |
53 | ;; shadow-read-files to load in the new information, or your changes will |
54 | ;; be overwritten! | |
55 | ||
56 | ;; Bugs & Warnings: | |
57 | ;; | |
58 | ;; - It is bad to have two emacses both running shadowfile at the same | |
59 | ;; time. It tries to detect this condition, but is not always successful. | |
60 | ;; | |
61 | ;; - You have to be careful not to edit a file in two locations | |
62 | ;; before shadowfile has had a chance to copy it; otherwise | |
63 | ;; "updating shadows" will overwrite one of the changed versions. | |
64 | ;; | |
65 | ;; - It ought to check modification times of both files to make sure | |
66 | ;; it is doing the right thing. This will have to wait until | |
67 | ;; file-newer-than-file-p works between machines. | |
68 | ;; | |
69 | ;; - It will not make directories for you, it just fails to copy files | |
70 | ;; that belong in non-existent directories. | |
71 | ;; | |
5762abec | 72 | ;; Please report any bugs to me (boris@gnu.org). Also let me know |
b578f267 | 73 | ;; if you have suggestions or would like to be informed of updates. |
bb5d4e1a | 74 | |
36fd8e17 | 75 | |
bb5d4e1a RS |
76 | ;;; Code: |
77 | ||
539a920c | 78 | (require 'cl-lib) |
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 | |
9201cc28 | 92 | "If t, always copy shadow files without asking. |
06b60517 | 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 | 98 | (defcustom shadow-inhibit-message nil |
9201cc28 | 99 | "If non-nil, do not display a message when a file needs copying." |
4bef9110 SE |
100 | :type 'boolean |
101 | :group 'shadow) | |
bb5d4e1a | 102 | |
4bef9110 | 103 | (defcustom shadow-inhibit-overload nil |
7ad8d84e | 104 | "If non-nil, shadowfile won't redefine \\[save-buffers-kill-emacs]. |
2fc88dcc JB |
105 | Normally it overloads the function `save-buffers-kill-emacs' to check for |
106 | files that have been changed and need to be copied to other systems." | |
4bef9110 SE |
107 | :type 'boolean |
108 | :group 'shadow) | |
bb5d4e1a | 109 | |
ece4bae5 GM |
110 | ;; FIXME in a sense, this changed in 24.4 (addition of locate-user-emacs-file), |
111 | ;; but due to the weird way this variable is initialized to nil, it didn't | |
112 | ;; literally change. Same for shadow-todo-file. | |
4bef9110 | 113 | (defcustom shadow-info-file nil |
36fd8e17 DL |
114 | "File to keep shadow information in. |
115 | The `shadow-info-file' should be shadowed to all your accounts to | |
ece4bae5 | 116 | ensure consistency. Default: ~/.emacs.d/shadows" |
4bef9110 SE |
117 | :type '(choice (const nil) file) |
118 | :group 'shadow) | |
bb5d4e1a | 119 | |
4bef9110 | 120 | (defcustom shadow-todo-file nil |
bb5d4e1a RS |
121 | "File to store the list of uncopied shadows in. |
122 | This means that if a remote system is down, or for any reason you cannot or | |
36fd8e17 DL |
123 | decide not to copy your shadow files at the end of one Emacs session, it will |
124 | remember and ask you again in your next Emacs session. | |
bb5d4e1a | 125 | This file must NOT be shadowed to any other system, it is host-specific. |
ece4bae5 | 126 | Default: ~/.emacs.d/shadow_todo" |
4bef9110 SE |
127 | :type '(choice (const nil) file) |
128 | :group 'shadow) | |
129 | ||
bb5d4e1a RS |
130 | |
131 | ;;; The following two variables should in most cases initialize themselves | |
132 | ;;; correctly. They are provided as variables in case the defaults are wrong | |
06b60517 | 133 | ;;; on your machine (and for efficiency). |
bb5d4e1a RS |
134 | |
135 | (defvar shadow-system-name (system-name) | |
136 | "The complete hostname of this machine.") | |
137 | ||
138 | (defvar shadow-homedir nil | |
139 | "Your home directory on this machine.") | |
140 | ||
141 | ;;; | |
142 | ;;; Internal variables whose values are stored in the info and todo files: | |
143 | ;;; | |
144 | ||
145 | (defvar shadow-clusters nil | |
06b60517 | 146 | "List of host clusters (see `shadow-define-cluster').") |
bb5d4e1a RS |
147 | |
148 | (defvar shadow-literal-groups nil | |
149 | "List of files that are shared between hosts. | |
150 | This list contains shadow structures with literal filenames, created by | |
7ad8d84e | 151 | `shadow-define-literal-group'.") |
bb5d4e1a RS |
152 | |
153 | (defvar shadow-regexp-groups nil | |
154 | "List of file types that are shared between hosts. | |
36fd8e17 DL |
155 | This list contains shadow structures with regexps matching filenames, |
156 | created by `shadow-define-regexp-group'.") | |
bb5d4e1a RS |
157 | |
158 | ;;; | |
159 | ;;; Other internal variables: | |
160 | ;;; | |
161 | ||
162 | (defvar shadow-files-to-copy nil) ; List of files that need to | |
163 | ; be copied to remote hosts. | |
164 | ||
165 | (defvar shadow-hashtable nil) ; for speed | |
166 | ||
167 | (defvar shadow-info-buffer nil) ; buf visiting shadow-info-file | |
168 | (defvar shadow-todo-buffer nil) ; buf visiting shadow-todo-file | |
169 | ||
170 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
171 | ;;; Syntactic sugar; General list and string manipulation | |
172 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
173 | ||
bb5d4e1a | 174 | (defun shadow-union (a b) |
36fd8e17 | 175 | "Add members of list A to list B if not equal to items already in B." |
bb5d4e1a RS |
176 | (if (null a) |
177 | b | |
178 | (if (member (car a) b) | |
179 | (shadow-union (cdr a) b) | |
180 | (shadow-union (cdr a) (cons (car a) b))))) | |
181 | ||
182 | (defun shadow-find (func list) | |
7ad8d84e | 183 | "If FUNC applied to some element of LIST is non-nil, return first such element." |
bb5d4e1a RS |
184 | (while (and list (not (funcall func (car list)))) |
185 | (setq list (cdr list))) | |
186 | (car list)) | |
187 | ||
bb5d4e1a | 188 | (defun shadow-regexp-superquote (string) |
36fd8e17 DL |
189 | "Like `regexp-quote', but includes the ^ and $. |
190 | This makes sure regexp matches nothing but STRING." | |
bb5d4e1a RS |
191 | (concat "^" (regexp-quote string) "$")) |
192 | ||
193 | (defun shadow-suffix (prefix string) | |
194 | "If PREFIX begins STRING, return the rest. | |
7ad8d84e | 195 | Return value is non-nil if PREFIX and STRING are `string=' up to the length of |
bb5d4e1a RS |
196 | PREFIX." |
197 | (let ((lp (length prefix)) | |
198 | (ls (length string))) | |
199 | (if (and (>= ls lp) | |
200 | (string= prefix (substring string 0 lp))) | |
201 | (substring string lp)))) | |
202 | ||
203 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
204 | ;;; Clusters and sites | |
205 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
206 | ||
207 | ;;; I use the term `site' to refer to a string which may be the name of a | |
208 | ;;; cluster or a literal hostname. All user-level commands should accept | |
209 | ;;; either. | |
210 | ||
211 | (defun shadow-make-cluster (name primary regexp) | |
36fd8e17 DL |
212 | "Create a shadow cluster. |
213 | It is called NAME, uses the PRIMARY hostname and REGEXP matching all | |
214 | hosts in the cluster. The variable `shadow-clusters' associates the | |
215 | names of clusters to these structures. This function is for program | |
216 | use: to create clusters interactively, use `shadow-define-cluster' | |
217 | instead." | |
bb5d4e1a RS |
218 | (list name primary regexp)) |
219 | ||
220 | (defmacro shadow-cluster-name (cluster) | |
221 | "Return the name of the CLUSTER." | |
222 | (list 'elt cluster 0)) | |
223 | ||
224 | (defmacro shadow-cluster-primary (cluster) | |
225 | "Return the primary hostname of a CLUSTER." | |
226 | (list 'elt cluster 1)) | |
227 | ||
228 | (defmacro shadow-cluster-regexp (cluster) | |
229 | "Return the regexp matching hosts in a CLUSTER." | |
230 | (list 'elt cluster 2)) | |
231 | ||
232 | (defun shadow-set-cluster (name primary regexp) | |
36fd8e17 DL |
233 | "Put cluster NAME on the list of clusters. |
234 | Replace old definition, if any. PRIMARY and REGEXP are the | |
bb5d4e1a | 235 | information defining the cluster. For interactive use, call |
36fd8e17 | 236 | `shadow-define-cluster' instead." |
539a920c GM |
237 | (let ((rest (cl-remove-if (lambda (x) (equal name (car x))) |
238 | shadow-clusters))) | |
36fd8e17 | 239 | (setq shadow-clusters |
bb5d4e1a RS |
240 | (cons (shadow-make-cluster name primary regexp) |
241 | rest)))) | |
242 | ||
243 | (defmacro shadow-get-cluster (name) | |
244 | "Return cluster named NAME, or nil." | |
245 | (list 'assoc name 'shadow-clusters)) | |
246 | ||
247 | (defun shadow-site-primary (site) | |
248 | "If SITE is a cluster, return primary host, otherwise return SITE." | |
249 | (let ((c (shadow-get-cluster site))) | |
250 | (if c | |
251 | (shadow-cluster-primary c) | |
252 | site))) | |
253 | ||
254 | ;;; SITES | |
255 | ||
256 | (defun shadow-site-cluster (site) | |
06b60517 | 257 | "Given a SITE (hostname or cluster name), return cluster it is in, or nil." |
bb5d4e1a RS |
258 | (or (assoc site shadow-clusters) |
259 | (shadow-find | |
260 | (function (lambda (x) | |
261 | (string-match (shadow-cluster-regexp x) | |
262 | site))) | |
263 | shadow-clusters))) | |
264 | ||
265 | (defun shadow-read-site () | |
266 | "Read a cluster name or hostname from the minibuffer." | |
267 | (let ((ans (completing-read "Host or cluster name [RET when done]: " | |
268 | shadow-clusters))) | |
269 | (if (equal "" ans) | |
270 | nil | |
271 | ans))) | |
272 | ||
273 | (defun shadow-site-match (site1 site2) | |
4837b516 | 274 | "Non-nil if SITE1 is or includes SITE2. |
7ad8d84e JB |
275 | Each may be a host or cluster name; if they are clusters, regexp of SITE1 will |
276 | be matched against the primary of SITE2." | |
bb5d4e1a RS |
277 | (or (string-equal site1 site2) ; quick check |
278 | (let* ((cluster1 (shadow-get-cluster site1)) | |
279 | (primary2 (shadow-site-primary site2))) | |
280 | (if cluster1 | |
281 | (string-match (shadow-cluster-regexp cluster1) primary2) | |
282 | (string-equal site1 primary2))))) | |
283 | ||
284 | (defun shadow-get-user (site) | |
36fd8e17 | 285 | "Return the default username for a SITE." |
bb5d4e1a RS |
286 | (ange-ftp-get-user (shadow-site-primary site))) |
287 | ||
288 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
289 | ;;; Filename manipulation | |
290 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
291 | ||
5354cb6d | 292 | (defun shadow-parse-fullname (fullname) |
06b60517 | 293 | "Parse FULLNAME into (site user path) list. |
2fc88dcc | 294 | Leave it alone if it already is one. Return nil if the argument is |
36fd8e17 | 295 | not a full ange-ftp pathname." |
5354cb6d RS |
296 | (if (listp fullname) |
297 | fullname | |
298 | (ange-ftp-ftp-name fullname))) | |
299 | ||
300 | (defun shadow-parse-name (name) | |
06b60517 | 301 | "Parse any NAME into (site user name) list. |
5354cb6d RS |
302 | Argument can be a simple name, full ange-ftp name, or already a hup list." |
303 | (or (shadow-parse-fullname name) | |
bb5d4e1a RS |
304 | (list shadow-system-name |
305 | (user-login-name) | |
5354cb6d | 306 | name))) |
bb5d4e1a | 307 | |
5354cb6d RS |
308 | (defsubst shadow-make-fullname (host user name) |
309 | "Make an ange-ftp style fullname out of HOST, USER (optional), and NAME. | |
bb5d4e1a | 310 | This is probably not as general as it ought to be." |
36fd8e17 | 311 | (concat "/" |
bb5d4e1a RS |
312 | (if user (concat user "@")) |
313 | host ":" | |
5354cb6d | 314 | name)) |
bb5d4e1a | 315 | |
5354cb6d RS |
316 | (defun shadow-replace-name-component (fullname newname) |
317 | "Return FULLNAME with the name component changed to NEWNAME." | |
318 | (let ((hup (shadow-parse-fullname fullname))) | |
319 | (shadow-make-fullname (nth 0 hup) (nth 1 hup) newname))) | |
bb5d4e1a RS |
320 | |
321 | (defun shadow-local-file (file) | |
36fd8e17 DL |
322 | "If FILE is at this site, remove /user@host part. |
323 | If refers to a different system or a different user on this system, | |
324 | return nil." | |
5354cb6d | 325 | (let ((hup (shadow-parse-fullname file))) |
bb5d4e1a RS |
326 | (cond ((null hup) file) |
327 | ((and (shadow-site-match (nth 0 hup) shadow-system-name) | |
328 | (string-equal (nth 1 hup) (user-login-name))) | |
329 | (nth 2 hup)) | |
330 | (t nil)))) | |
331 | ||
332 | (defun shadow-expand-cluster-in-file-name (file) | |
36fd8e17 | 333 | "If hostname part of FILE is a cluster, expand it to cluster's primary hostname. |
5354cb6d | 334 | Will return the name bare if it is a local file." |
06b60517 | 335 | (let ((hup (shadow-parse-name file))) |
bb5d4e1a RS |
336 | (cond ((null hup) file) |
337 | ((shadow-local-file hup)) | |
5354cb6d | 338 | ((shadow-make-fullname (shadow-site-primary (nth 0 hup)) |
bb5d4e1a RS |
339 | (nth 1 hup) |
340 | (nth 2 hup)))))) | |
341 | ||
342 | (defun shadow-expand-file-name (file &optional default) | |
7ad8d84e | 343 | "Expand file name and get FILE's true name." |
bb5d4e1a RS |
344 | (file-truename (expand-file-name file default))) |
345 | ||
346 | (defun shadow-contract-file-name (file) | |
36fd8e17 DL |
347 | "Simplify FILE. |
348 | Do so by replacing (when possible) home directory with ~, and hostname | |
349 | with cluster name that includes it. Filename should be absolute and | |
350 | true." | |
5354cb6d | 351 | (let* ((hup (shadow-parse-name file)) |
bb5d4e1a RS |
352 | (homedir (if (shadow-local-file hup) |
353 | shadow-homedir | |
354 | (file-name-as-directory | |
5354cb6d | 355 | (nth 2 (shadow-parse-fullname |
bb5d4e1a | 356 | (expand-file-name |
5354cb6d | 357 | (shadow-make-fullname |
bb5d4e1a RS |
358 | (nth 0 hup) (nth 1 hup) "~"))))))) |
359 | (suffix (shadow-suffix homedir (nth 2 hup))) | |
360 | (cluster (shadow-site-cluster (nth 0 hup)))) | |
5354cb6d | 361 | (shadow-make-fullname |
bb5d4e1a RS |
362 | (if cluster |
363 | (shadow-cluster-name cluster) | |
364 | (nth 0 hup)) | |
365 | (nth 1 hup) | |
36fd8e17 | 366 | (if suffix |
bb5d4e1a RS |
367 | (concat "~/" suffix) |
368 | (nth 2 hup))))) | |
369 | ||
370 | (defun shadow-same-site (pattern file) | |
371 | "True if the site of PATTERN and of FILE are on the same site. | |
372 | If usernames are supplied, they must also match exactly. PATTERN and FILE may | |
5354cb6d | 373 | be lists of host, user, name, or ange-ftp file names. FILE may also be just a |
bb5d4e1a | 374 | local filename." |
5354cb6d RS |
375 | (let ((pattern-sup (shadow-parse-fullname pattern)) |
376 | (file-sup (shadow-parse-name file))) | |
bb5d4e1a RS |
377 | (and |
378 | (shadow-site-match (nth 0 pattern-sup) (nth 0 file-sup)) | |
379 | (or (null (nth 1 pattern-sup)) | |
380 | (string-equal (nth 1 pattern-sup) (nth 1 file-sup)))))) | |
381 | ||
382 | (defun shadow-file-match (pattern file &optional regexp) | |
36fd8e17 | 383 | "Return t if PATTERN matches FILE. |
5354cb6d | 384 | If REGEXP is supplied and non-nil, the file part of the pattern is a regular |
bb5d4e1a | 385 | expression, otherwise it must match exactly. The sites and usernames must |
2fc88dcc JB |
386 | match---see `shadow-same-site'. The pattern must be in full ange-ftp format, |
387 | but the file can be any valid filename. This function does not do any | |
388 | filename expansion or contraction, you must do that yourself first." | |
5354cb6d RS |
389 | (let* ((pattern-sup (shadow-parse-fullname pattern)) |
390 | (file-sup (shadow-parse-name file))) | |
bb5d4e1a | 391 | (and (shadow-same-site pattern-sup file-sup) |
36fd8e17 | 392 | (if regexp |
bb5d4e1a RS |
393 | (string-match (nth 2 pattern-sup) (nth 2 file-sup)) |
394 | (string-equal (nth 2 pattern-sup) (nth 2 file-sup)))))) | |
f1180544 | 395 | |
bb5d4e1a RS |
396 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
397 | ;;; User-level Commands | |
398 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
399 | ||
36fd8e17 | 400 | ;;;###autoload |
bb5d4e1a | 401 | (defun shadow-define-cluster (name) |
06b60517 | 402 | "Edit (or create) the definition of a cluster NAME. |
bb5d4e1a RS |
403 | This is a group of hosts that share directories, so that copying to or from |
404 | one of them is sufficient to update the file on all of them. Clusters are | |
06b60517 | 405 | defined by a name, the network address of a primary host (the one we copy |
2fc88dcc JB |
406 | files to), and a regular expression that matches the hostnames of all the |
407 | sites in the cluster." | |
bb5d4e1a RS |
408 | (interactive (list (completing-read "Cluster name: " shadow-clusters () ()))) |
409 | (let* ((old (shadow-get-cluster name)) | |
410 | (primary (read-string "Primary host: " | |
36fd8e17 | 411 | (if old (shadow-cluster-primary old) |
bb5d4e1a RS |
412 | name))) |
413 | (regexp (let (try-regexp) | |
414 | (while (not | |
36fd8e17 | 415 | (string-match |
bb5d4e1a | 416 | (setq try-regexp |
36fd8e17 | 417 | (read-string |
bb5d4e1a RS |
418 | "Regexp matching all host names: " |
419 | (if old (shadow-cluster-regexp old) | |
420 | (shadow-regexp-superquote primary)))) | |
421 | primary)) | |
422 | (message "Regexp doesn't include the primary host!") | |
423 | (sit-for 2)) | |
424 | try-regexp)) | |
36fd8e17 | 425 | ; (username (read-no-blanks-input |
5b76833f | 426 | ; (format "Username (default %s): " |
bb5d4e1a RS |
427 | ; (shadow-get-user primary)) |
428 | ; (if old (or (shadow-cluster-username old) "") | |
429 | ; (user-login-name)))) | |
430 | ) | |
431 | ; (if (string-equal "" username) (setq username nil)) | |
432 | (shadow-set-cluster name primary regexp))) | |
433 | ||
36fd8e17 | 434 | ;;;###autoload |
bb5d4e1a RS |
435 | (defun shadow-define-literal-group () |
436 | "Declare a single file to be shared between sites. | |
437 | It may have different filenames on each site. When this file is edited, the | |
438 | new version will be copied to each of the other locations. Sites can be | |
06b60517 | 439 | specific hostnames, or names of clusters (see `shadow-define-cluster')." |
bb5d4e1a | 440 | (interactive) |
5354cb6d | 441 | (let* ((hup (shadow-parse-fullname |
bb5d4e1a | 442 | (shadow-contract-file-name (buffer-file-name)))) |
5354cb6d | 443 | (name (nth 2 hup)) |
bb5d4e1a RS |
444 | user site group) |
445 | (while (setq site (shadow-read-site)) | |
5b76833f | 446 | (setq user (read-string (format "Username (default %s): " |
bb5d4e1a | 447 | (shadow-get-user site))) |
5354cb6d RS |
448 | name (read-string "Filename: " name)) |
449 | (setq group (cons (shadow-make-fullname site | |
bb5d4e1a RS |
450 | (if (string-equal "" user) |
451 | (shadow-get-user site) | |
452 | user) | |
5354cb6d | 453 | name) |
bb5d4e1a RS |
454 | group))) |
455 | (setq shadow-literal-groups (cons group shadow-literal-groups))) | |
456 | (shadow-write-info-file)) | |
457 | ||
36fd8e17 | 458 | ;;;###autoload |
bb5d4e1a RS |
459 | (defun shadow-define-regexp-group () |
460 | "Make each of a group of files be shared between hosts. | |
461 | Prompts for regular expression; files matching this are shared between a list | |
36fd8e17 | 462 | of sites, which are also prompted for. The filenames must be identical on all |
06b60517 JB |
463 | hosts (if they aren't, use `shadow-define-literal-group' instead of this |
464 | function). Each site can be either a hostname or the name of a cluster (see | |
36fd8e17 | 465 | `shadow-define-cluster')." |
bb5d4e1a | 466 | (interactive) |
36fd8e17 DL |
467 | (let ((regexp (read-string |
468 | "Filename regexp: " | |
bb5d4e1a RS |
469 | (if (buffer-file-name) |
470 | (shadow-regexp-superquote | |
471 | (nth 2 | |
5354cb6d | 472 | (shadow-parse-name |
bb5d4e1a RS |
473 | (shadow-contract-file-name |
474 | (buffer-file-name)))))))) | |
475 | site sites usernames) | |
476 | (while (setq site (shadow-read-site)) | |
477 | (setq sites (cons site sites)) | |
36fd8e17 | 478 | (setq usernames |
bb5d4e1a RS |
479 | (cons (read-string (format "Username for %s: " site) |
480 | (shadow-get-user site)) | |
481 | usernames))) | |
36fd8e17 | 482 | (setq shadow-regexp-groups |
bb5d4e1a RS |
483 | (cons (shadow-make-group regexp sites usernames) |
484 | shadow-regexp-groups)) | |
485 | (shadow-write-info-file))) | |
f1180544 | 486 | |
bb5d4e1a RS |
487 | (defun shadow-shadows () |
488 | ;; Mostly for debugging. | |
489 | "Interactive function to display shadows of a buffer." | |
490 | (interactive) | |
32f389a4 | 491 | (let ((msg (mapconcat #'cdr (shadow-shadows-of (buffer-file-name)) " "))) |
673dac20 | 492 | (message "%s" |
36fd8e17 | 493 | (if (zerop (length msg)) |
bb5d4e1a RS |
494 | "No shadows." |
495 | msg)))) | |
496 | ||
497 | (defun shadow-copy-files (&optional arg) | |
498 | "Copy all pending shadow files. | |
499 | With prefix argument, copy all pending files without query. | |
36fd8e17 DL |
500 | Pending copies are stored in variable `shadow-files-to-copy', and in |
501 | `shadow-todo-file' if necessary. This function is invoked by | |
502 | `shadow-save-buffers-kill-emacs', so it is not usually necessary to | |
bb5d4e1a RS |
503 | call it manually." |
504 | (interactive "P") | |
4f8e58ec | 505 | (if (not shadow-files-to-copy) |
32226619 | 506 | (if (called-interactively-p 'interactive) |
4f8e58ec | 507 | (message "No files need to be shadowed.")) |
bb5d4e1a RS |
508 | (save-excursion |
509 | (map-y-or-n-p (function | |
510 | (lambda (pair) | |
191b14ba | 511 | (or arg shadow-noquery |
bb5d4e1a RS |
512 | (format "Copy shadow file %s? " (cdr pair))))) |
513 | (function shadow-copy-file) | |
514 | shadow-files-to-copy | |
515 | '("shadow" "shadows" "copy")) | |
516 | (shadow-write-todo-file t)))) | |
517 | ||
518 | (defun shadow-cancel () | |
519 | "Cancel the instruction to copy some files. | |
520 | Prompts for which copy operations to cancel. You will not be asked to copy | |
521 | them again, unless you make more changes to the files. To cancel a shadow | |
36fd8e17 DL |
522 | permanently, remove the group from `shadow-literal-groups' or |
523 | `shadow-regexp-groups'." | |
bb5d4e1a RS |
524 | (interactive) |
525 | (map-y-or-n-p (function (lambda (pair) | |
36fd8e17 | 526 | (format "Cancel copying %s to %s? " |
bb5d4e1a | 527 | (car pair) (cdr pair)))) |
36fd8e17 | 528 | (function (lambda (pair) |
bb5d4e1a RS |
529 | (shadow-remove-from-todo pair))) |
530 | shadow-files-to-copy | |
531 | '("shadow" "shadows" "cancel copy")) | |
36fd8e17 | 532 | (message "There are %d shadows to be updated." |
673dac20 | 533 | (length shadow-files-to-copy)) |
bb5d4e1a RS |
534 | (shadow-write-todo-file)) |
535 | ||
536 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
537 | ;;; Internal functions | |
538 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
539 | ||
540 | (defun shadow-make-group (regexp sites usernames) | |
36fd8e17 | 541 | "Make a description of a file group--- |
06b60517 | 542 | actually a list of regexp ange-ftp file names---from REGEXP (name of file to |
bb5d4e1a RS |
543 | be shadowed), list of SITES, and corresponding list of USERNAMES for each |
544 | site." | |
545 | (if sites | |
5354cb6d | 546 | (cons (shadow-make-fullname (car sites) (car usernames) regexp) |
bb5d4e1a RS |
547 | (shadow-make-group regexp (cdr sites) (cdr usernames))) |
548 | nil)) | |
549 | ||
550 | (defun shadow-copy-file (s) | |
551 | "Copy one shadow file." | |
36fd8e17 DL |
552 | (let* ((buffer |
553 | (cond ((get-file-buffer | |
191b14ba | 554 | (abbreviate-file-name (shadow-expand-file-name (car s))))) |
bb5d4e1a RS |
555 | ((not (file-readable-p (car s))) |
556 | (if (y-or-n-p | |
36fd8e17 | 557 | (format "Cannot find file %s--cancel copy request? " |
bb5d4e1a RS |
558 | (car s))) |
559 | (shadow-remove-from-todo s)) | |
560 | nil) | |
191b14ba | 561 | ((or (eq t shadow-noquery) |
36fd8e17 DL |
562 | (y-or-n-p |
563 | (format "No buffer for %s -- update shadow anyway? " | |
191b14ba | 564 | (car s)))) |
bb5d4e1a RS |
565 | (find-file-noselect (car s))))) |
566 | (to (shadow-expand-cluster-in-file-name (cdr s)))) | |
5a7b9024 | 567 | (when buffer |
bb5d4e1a | 568 | (set-buffer buffer) |
06b60517 | 569 | (condition-case nil |
348a60a8 | 570 | (progn |
737ef682 | 571 | (write-region nil nil to) |
ab1d3835 SM |
572 | (shadow-remove-from-todo s)) |
573 | (error (message "Shadow %s not updated!" (cdr s))))))) | |
bb5d4e1a RS |
574 | |
575 | (defun shadow-shadows-of (file) | |
36fd8e17 DL |
576 | "Return copy operations needed to update FILE. |
577 | Filename should have clusters expanded, but otherwise can have any format. | |
06b60517 | 578 | Return value is a list of dotted pairs like (from . to), where from |
bb5d4e1a RS |
579 | and to are absolute file names." |
580 | (or (symbol-value (intern-soft file shadow-hashtable)) | |
581 | (let* ((absolute-file (shadow-expand-file-name | |
582 | (or (shadow-local-file file) file) | |
583 | shadow-homedir)) | |
584 | (canonical-file (shadow-contract-file-name absolute-file)) | |
36fd8e17 | 585 | (shadows |
bb5d4e1a RS |
586 | (mapcar (function (lambda (shadow) |
587 | (cons absolute-file shadow))) | |
588 | (append | |
589 | (shadow-shadows-of-1 | |
590 | canonical-file shadow-literal-groups nil) | |
591 | (shadow-shadows-of-1 | |
592 | canonical-file shadow-regexp-groups t))))) | |
593 | (set (intern file shadow-hashtable) shadows)))) | |
594 | ||
595 | (defun shadow-shadows-of-1 (file groups regexp) | |
36fd8e17 DL |
596 | "Return list of FILE's shadows in GROUPS. |
597 | Consider them as regular expressions if third arg REGEXP is true." | |
bb5d4e1a RS |
598 | (if groups |
599 | (let ((nonmatching | |
539a920c GM |
600 | (cl-remove-if (lambda (x) (shadow-file-match x file regexp)) |
601 | (car groups)))) | |
bb5d4e1a | 602 | (append (cond ((equal nonmatching (car groups)) nil) |
36fd8e17 | 603 | (regexp |
5354cb6d | 604 | (let ((realname (nth 2 (shadow-parse-fullname file)))) |
36fd8e17 DL |
605 | (mapcar |
606 | (function | |
607 | (lambda (x) | |
5354cb6d | 608 | (shadow-replace-name-component x realname))) |
bb5d4e1a RS |
609 | nonmatching))) |
610 | (t nonmatching)) | |
611 | (shadow-shadows-of-1 file (cdr groups) regexp))))) | |
612 | ||
613 | (defun shadow-add-to-todo () | |
36fd8e17 DL |
614 | "If current buffer has shadows, add them to the list needing to be copied." |
615 | (let ((shadows (shadow-shadows-of | |
616 | (shadow-expand-file-name | |
bb5d4e1a | 617 | (buffer-file-name (current-buffer)))))) |
5a7b9024 | 618 | (when shadows |
bb5d4e1a RS |
619 | (setq shadow-files-to-copy |
620 | (shadow-union shadows shadow-files-to-copy)) | |
5a7b9024 | 621 | (when (not shadow-inhibit-message) |
673dac20 KH |
622 | (message "%s" (substitute-command-keys |
623 | "Use \\[shadow-copy-files] to update shadows.")) | |
bb5d4e1a RS |
624 | (sit-for 1)) |
625 | (shadow-write-todo-file))) | |
32f389a4 | 626 | nil) ; Return nil for write-file-functions |
bb5d4e1a RS |
627 | |
628 | (defun shadow-remove-from-todo (pair) | |
36fd8e17 | 629 | "Remove PAIR from `shadow-files-to-copy'. |
2fc88dcc | 630 | PAIR must be `eq' to one of the elements of that list." |
36fd8e17 | 631 | (setq shadow-files-to-copy |
539a920c | 632 | (cl-remove-if (lambda (s) (eq s pair)) shadow-files-to-copy))) |
bb5d4e1a RS |
633 | |
634 | (defun shadow-read-files () | |
36fd8e17 DL |
635 | "Visit and load `shadow-info-file' and `shadow-todo-file'. |
636 | Thus restores shadowfile's state from your last Emacs session. | |
2fc88dcc | 637 | Return t unless files were locked; then return nil." |
bb5d4e1a | 638 | (interactive) |
191b14ba RS |
639 | (if (and (fboundp 'file-locked-p) |
640 | (or (stringp (file-locked-p shadow-info-file)) | |
641 | (stringp (file-locked-p shadow-todo-file)))) | |
bb5d4e1a | 642 | (progn |
7ad8d84e | 643 | (message "Shadowfile is running in another Emacs; can't have two.") |
bb5d4e1a RS |
644 | (beep) |
645 | (sit-for 3) | |
646 | nil) | |
940e5099 | 647 | (save-current-buffer |
5a7b9024 | 648 | (when shadow-info-file |
bb5d4e1a RS |
649 | (set-buffer (setq shadow-info-buffer |
650 | (find-file-noselect shadow-info-file))) | |
5a7b9024 GM |
651 | (when (and (not (buffer-modified-p)) |
652 | (file-newer-than-file-p (make-auto-save-file-name) | |
653 | shadow-info-file)) | |
bb5d4e1a | 654 | (erase-buffer) |
36fd8e17 | 655 | (message "Data recovered from %s." |
bb5d4e1a RS |
656 | (car (insert-file-contents (make-auto-save-file-name)))) |
657 | (sit-for 1)) | |
887195ac | 658 | (eval-buffer)) |
5a7b9024 | 659 | (when shadow-todo-file |
36fd8e17 | 660 | (set-buffer (setq shadow-todo-buffer |
bb5d4e1a | 661 | (find-file-noselect shadow-todo-file))) |
5a7b9024 GM |
662 | (when (and (not (buffer-modified-p)) |
663 | (file-newer-than-file-p (make-auto-save-file-name) | |
664 | shadow-todo-file)) | |
bb5d4e1a | 665 | (erase-buffer) |
36fd8e17 | 666 | (message "Data recovered from %s." |
bb5d4e1a RS |
667 | (car (insert-file-contents (make-auto-save-file-name)))) |
668 | (sit-for 1)) | |
887195ac | 669 | (eval-buffer nil)) |
bb5d4e1a RS |
670 | (shadow-invalidate-hashtable)) |
671 | t)) | |
672 | ||
673 | (defun shadow-write-info-file () | |
36fd8e17 DL |
674 | "Write out information to `shadow-info-file'. |
675 | Also clear `shadow-hashtable', since when there are new shadows | |
676 | defined, the old hashtable info is invalid." | |
bb5d4e1a RS |
677 | (shadow-invalidate-hashtable) |
678 | (if shadow-info-file | |
940e5099 | 679 | (save-current-buffer |
bb5d4e1a RS |
680 | (if (not shadow-info-buffer) |
681 | (setq shadow-info-buffer (find-file-noselect shadow-info-file))) | |
682 | (set-buffer shadow-info-buffer) | |
683 | (delete-region (point-min) (point-max)) | |
684 | (shadow-insert-var 'shadow-clusters) | |
685 | (shadow-insert-var 'shadow-literal-groups) | |
686 | (shadow-insert-var 'shadow-regexp-groups)))) | |
687 | ||
688 | (defun shadow-write-todo-file (&optional save) | |
7ad8d84e JB |
689 | "Write out information to `shadow-todo-file'. |
690 | With non-nil argument also saves the buffer." | |
bb5d4e1a RS |
691 | (save-excursion |
692 | (if (not shadow-todo-buffer) | |
693 | (setq shadow-todo-buffer (find-file-noselect shadow-todo-file))) | |
694 | (set-buffer shadow-todo-buffer) | |
695 | (delete-region (point-min) (point-max)) | |
696 | (shadow-insert-var 'shadow-files-to-copy) | |
697 | (if save (shadow-save-todo-file)))) | |
698 | ||
699 | (defun shadow-save-todo-file () | |
700 | (if (and shadow-todo-buffer (buffer-modified-p shadow-todo-buffer)) | |
7fdbcd83 | 701 | (with-current-buffer shadow-todo-buffer |
36fd8e17 | 702 | (condition-case nil ; have to continue even in case of |
bb5d4e1a RS |
703 | (basic-save-buffer) ; error, otherwise kill-emacs might |
704 | (error ; not work! | |
705 | (message "WARNING: Can't save shadow todo file; it is locked!") | |
706 | (sit-for 1)))))) | |
707 | ||
708 | (defun shadow-invalidate-hashtable () | |
709 | (setq shadow-hashtable (make-vector 37 0))) | |
710 | ||
711 | (defun shadow-insert-var (variable) | |
2fc88dcc JB |
712 | "Build a `setq' to restore VARIABLE. |
713 | Prettily insert a `setq' command which, when later evaluated, | |
714 | will restore VARIABLE to its current setting. | |
7ad8d84e | 715 | VARIABLE must be the name of a variable whose value is a list." |
bb5d4e1a RS |
716 | (let ((standard-output (current-buffer))) |
717 | (insert (format "(setq %s" variable)) | |
718 | (cond ((consp (eval variable)) | |
36fd8e17 | 719 | (insert "\n '(") |
bb5d4e1a RS |
720 | (prin1 (car (eval variable))) |
721 | (let ((rest (cdr (eval variable)))) | |
722 | (while rest | |
723 | (insert "\n ") | |
724 | (prin1 (car rest)) | |
725 | (setq rest (cdr rest))) | |
726 | (insert "))\n\n"))) | |
727 | (t (insert " ") | |
728 | (prin1 (eval variable)) | |
729 | (insert ")\n\n"))))) | |
730 | ||
731 | (defun shadow-save-buffers-kill-emacs (&optional arg) | |
732 | "Offer to save each buffer and copy shadows, then kill this Emacs process. | |
733 | With prefix arg, silently save all file-visiting buffers, then kill. | |
734 | ||
735 | Extended by shadowfile to automatically save `shadow-todo-file' and | |
736 | look for files that have been changed and need to be copied to other systems." | |
737 | ;; This function is necessary because we need to get control and save | |
738 | ;; the todo file /after/ saving other files, but /before/ the warning | |
739 | ;; message about unsaved buffers (because it can get modified by the | |
740 | ;; action of saving other buffers). `kill-emacs-hook' is no good | |
741 | ;; because it is not called at the correct time, and also because it is | |
742 | ;; called when the terminal is disconnected and we cannot ask whether | |
743 | ;; to copy files. | |
744 | (interactive "P") | |
745 | (shadow-save-todo-file) | |
746 | (save-some-buffers arg t) | |
747 | (shadow-copy-files) | |
748 | (shadow-save-todo-file) | |
749 | (and (or (not (memq t (mapcar (function | |
750 | (lambda (buf) (and (buffer-file-name buf) | |
751 | (buffer-modified-p buf)))) | |
752 | (buffer-list)))) | |
753 | (yes-or-no-p "Modified buffers exist; exit anyway? ")) | |
754 | (or (not (fboundp 'process-list)) | |
7c2fb837 | 755 | ;; process-list is not defined on MSDOS. |
bb5d4e1a RS |
756 | (let ((processes (process-list)) |
757 | active) | |
758 | (while processes | |
41c4dfe1 KS |
759 | (and (memq (process-status (car processes)) '(run stop open listen)) |
760 | (process-query-on-exit-flag (car processes)) | |
bb5d4e1a RS |
761 | (setq active t)) |
762 | (setq processes (cdr processes))) | |
763 | (or (not active) | |
764 | (yes-or-no-p "Active processes exist; kill them and exit anyway? ")))) | |
765 | (kill-emacs))) | |
766 | ||
767 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
36fd8e17 | 768 | ;;; Lucid Emacs compatibility |
bb5d4e1a RS |
769 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
770 | ||
191b14ba RS |
771 | ;; This is on hold until someone tells me about a working version of |
772 | ;; map-ynp for Lucid Emacs. | |
773 | ||
5a7b9024 | 774 | ;(when (string-match "Lucid" emacs-version) |
191b14ba RS |
775 | ; (require 'symlink-fix) |
776 | ; (require 'ange-ftp) | |
777 | ; (require 'map-ynp) | |
778 | ; (if (not (fboundp 'file-truename)) | |
36fd8e17 | 779 | ; (fset 'shadow-expand-file-name |
191b14ba RS |
780 | ; (symbol-function 'symlink-expand-file-name))) |
781 | ; (if (not (fboundp 'ange-ftp-ftp-name)) | |
782 | ; (fset 'ange-ftp-ftp-name | |
5354cb6d | 783 | ; (symbol-function 'ange-ftp-ftp-name)))) |
bb5d4e1a RS |
784 | |
785 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
786 | ;;; Hook us up | |
787 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
788 | ||
36fd8e17 | 789 | ;;;###autoload |
bb5d4e1a | 790 | (defun shadow-initialize () |
36fd8e17 DL |
791 | "Set up file shadowing." |
792 | (interactive) | |
bb5d4e1a RS |
793 | (if (null shadow-homedir) |
794 | (setq shadow-homedir | |
795 | (file-name-as-directory (shadow-expand-file-name "~")))) | |
796 | (if (null shadow-info-file) | |
36fd8e17 | 797 | (setq shadow-info-file |
940e5099 SM |
798 | ;; FIXME: Move defaults to their defcustom. |
799 | (shadow-expand-file-name | |
800 | (locate-user-emacs-file "shadows" ".shadows")))) | |
bb5d4e1a | 801 | (if (null shadow-todo-file) |
36fd8e17 | 802 | (setq shadow-todo-file |
b6489a43 | 803 | (shadow-expand-file-name |
940e5099 | 804 | (locate-user-emacs-file "shadow_todo" ".shadow_todo")))) |
bb5d4e1a RS |
805 | (if (not (shadow-read-files)) |
806 | (progn | |
807 | (message "Shadowfile information files not found - aborting") | |
808 | (beep) | |
809 | (sit-for 3)) | |
5a7b9024 GM |
810 | (when (and (not shadow-inhibit-overload) |
811 | (not (fboundp 'shadow-orig-save-buffers-kill-emacs))) | |
36fd8e17 DL |
812 | (defalias 'shadow-orig-save-buffers-kill-emacs |
813 | (symbol-function 'save-buffers-kill-emacs)) | |
814 | (defalias 'save-buffers-kill-emacs 'shadow-save-buffers-kill-emacs)) | |
32f389a4 | 815 | (add-hook 'write-file-functions 'shadow-add-to-todo) |
bb5d4e1a RS |
816 | (define-key ctl-x-4-map "s" 'shadow-copy-files))) |
817 | ||
32f389a4 JB |
818 | (defun shadowfile-unload-function () |
819 | (substitute-key-definition 'shadow-copy-files nil ctl-x-4-map) | |
820 | (when (fboundp 'shadow-orig-save-buffers-kill-emacs) | |
821 | (fset 'save-buffers-kill-emacs | |
822 | (symbol-function 'shadow-orig-save-buffers-kill-emacs))) | |
823 | ;; continue standard unloading | |
824 | nil) | |
a6d23706 | 825 | |
36fd8e17 DL |
826 | (provide 'shadowfile) |
827 | ||
bb5d4e1a | 828 | ;;; shadowfile.el ends here |