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fce30d79 MK |
1 | ;;; ediff-ptch.el --- Ediff's patch support |
2 | ||
ddc90f39 | 3 | ;; Copyright (C) 1996, 1997 Free Software Foundation, Inc. |
fce30d79 MK |
4 | |
5 | ;; Author: Michael Kifer <kifer@cs.sunysb.edu> | |
6 | ||
7 | ;; This file is part of GNU Emacs. | |
8 | ||
9 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
10 | ;; it under the terms of the GNU General Public License as published by | |
11 | ;; the Free Software Foundation; either version 2, or (at your option) | |
12 | ;; any later version. | |
13 | ||
14 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
15 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ;; GNU General Public License for more details. | |
18 | ||
19 | ;; You should have received a copy of the GNU General Public License | |
20 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
21 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | ;; Boston, MA 02111-1307, USA. | |
23 | ||
24 | ||
25 | ;;; Code: | |
ddc90f39 MK |
26 | |
27 | (provide 'ediff-ptch) | |
28 | ||
29 | (defgroup ediff-ptch nil | |
30 | "Ediff patch support" | |
31 | :tag "Patch" | |
32 | :prefix "ediff-" | |
33 | :group 'ediff) | |
34 | ||
35 | ;; compiler pacifier | |
36 | (defvar ediff-window-A) | |
37 | (defvar ediff-window-B) | |
38 | (defvar ediff-window-C) | |
39 | (defvar ediff-use-last-dir) | |
40 | (defvar ediff-shell) | |
41 | ||
42 | (eval-when-compile | |
43 | (let ((load-path (cons (expand-file-name ".") load-path))) | |
44 | (or (featurep 'ediff-init) | |
45 | (load "ediff-init.el" nil nil 'nosuffix)) | |
46 | (or (featurep 'ediff) | |
47 | (load "ediff.el" nil nil 'nosuffix)) | |
48 | )) | |
49 | ;; end pacifier | |
fce30d79 | 50 | |
4b45b44f RS |
51 | (require 'ediff-init) |
52 | ||
1e70790f MK |
53 | (defcustom ediff-patch-program "patch" |
54 | "*Name of the program that applies patches. | |
55 | It is recommended to use GNU-compatible versions." | |
56 | :type 'string | |
57 | :group 'ediff-ptch) | |
58 | (defcustom ediff-patch-options "-f" | |
59 | "*Options to pass to ediff-patch-program. | |
60 | ||
61 | Note: the `-b' option should be specified in `ediff-backup-specs'. | |
62 | ||
63 | It is recommended to pass the `-f' option to the patch program, so it won't ask | |
64 | questions. However, some implementations don't accept this option, in which | |
65 | case the default value for this variable should be changed." | |
66 | :type 'string | |
67 | :group 'ediff-ptch) | |
68 | ||
fce30d79 MK |
69 | (defvar ediff-last-dir-patch nil |
70 | "Last directory used by an Ediff command for file to patch.") | |
71 | ||
1e70790f MK |
72 | ;; the default backup extension |
73 | (defconst ediff-default-backup-extension | |
74 | (if (memq system-type '(vax-vms axp-vms emx ms-dos)) | |
75 | "_orig" ".orig")) | |
76 | ||
77 | ||
78 | (defcustom ediff-backup-extension ediff-default-backup-extension | |
92c51e07 | 79 | "Backup extension used by the patch program. |
1e70790f MK |
80 | See also `ediff-backup-specs'." |
81 | :type 'string | |
82 | :group 'ediff-ptch) | |
92c51e07 | 83 | |
bd698e98 MK |
84 | (defun ediff-test-patch-utility () |
85 | (cond ((zerop (call-process ediff-patch-program nil nil nil "-z." "-b")) | |
86 | ;; GNU `patch' v. >= 2.2 | |
87 | 'gnu) | |
88 | ((zerop (call-process ediff-patch-program nil nil nil "-b")) | |
89 | 'posix) | |
90 | (t 'traditional))) | |
91 | ||
1e70790f | 92 | (defcustom ediff-backup-specs |
bd698e98 MK |
93 | (let ((type (ediff-test-patch-utility))) |
94 | (cond ((eq type 'gnu) | |
95 | ;; GNU `patch' v. >= 2.2 | |
96 | (format "-z%s -b" ediff-backup-extension)) | |
97 | ((eq type 'posix) | |
98 | ;; POSIX `patch' -- ediff-backup-extension must be ".orig" | |
99 | (setq ediff-backup-extension ediff-default-backup-extension) | |
100 | "-b") | |
101 | (t | |
102 | ;; traditional `patch' | |
103 | (format "-b %s" ediff-backup-extension)))) | |
92c51e07 MK |
104 | "*Backup directives to pass to the patch program. |
105 | Ediff requires that the old version of the file \(before applying the patch\) | |
1e70790f | 106 | be saved in a file named `the-patch-file.extension'. Usually `extension' is |
92c51e07 MK |
107 | `.orig', but this can be changed by the user and may depend on the system. |
108 | Therefore, Ediff needs to know the backup extension used by the patch program. | |
109 | ||
110 | Some versions of the patch program let you specify `-b backup-extension'. | |
1e70790f MK |
111 | Other versions only permit `-b', which assumes the extension `.orig' |
112 | \(in which case ediff-backup-extension MUST be also `.orig'\). The latest | |
113 | versions of GNU patch require `-b -z backup-extension'. | |
92c51e07 MK |
114 | |
115 | Note that both `ediff-backup-extension' and `ediff-backup-specs' | |
1e70790f | 116 | must be set properly. If your patch program takes the option `-b', |
92c51e07 | 117 | but not `-b extension', the variable `ediff-backup-extension' must |
bd698e98 MK |
118 | still be set so Ediff will know which extension to use. |
119 | ||
120 | Ediff tries to guess the appropriate value for this variables. It is believed | |
121 | to be working for `traditional' patch, all versions of GNU patch, and for POSIX | |
122 | patch. So, don't change these variables, unless the default doesn't work." | |
ddc90f39 MK |
123 | :type 'string |
124 | :group 'ediff-ptch) | |
92c51e07 | 125 | |
fce30d79 | 126 | |
ddc90f39 MK |
127 | (defcustom ediff-patch-default-directory nil |
128 | "*Default directory to look for patches." | |
129 | :type '(choice (const nil) string) | |
130 | :group 'ediff-ptch) | |
fce30d79 | 131 | |
ddc90f39 | 132 | (defcustom ediff-context-diff-label-regexp |
fce30d79 MK |
133 | (concat "\\(" ; context diff 2-liner |
134 | "^\\*\\*\\* \\([^ \t]+\\)[^*]+[\t ]*\n--- \\([^ \t]+\\)" | |
135 | "\\|" ; GNU unified format diff 2-liner | |
a8b7f4b9 | 136 | "^--- \\([^ \t]+\\)[\t ]+.*\n\\+\\+\\+ \\([^ \t]+\\)" |
fce30d79 | 137 | "\\)") |
1e70790f MK |
138 | "*Regexp matching filename 2-liners at the start of each context diff. |
139 | You probably don't want to change that, unless you are using an obscure patch | |
140 | program." | |
ddc90f39 MK |
141 | :type 'regexp |
142 | :group 'ediff-ptch) | |
fce30d79 | 143 | |
fce30d79 MK |
144 | ;; The buffer of the patch file. Local to control buffer. |
145 | (ediff-defvar-local ediff-patchbufer nil "") | |
146 | ||
147 | ;; The buffer where patch displays its diagnostics. | |
148 | (ediff-defvar-local ediff-patch-diagnostics nil "") | |
149 | ||
150 | ;; Map of patch buffer. Has the form: | |
151 | ;; ((filename1 marker1 marker2) (filename2 marker1 marker2) ...) | |
152 | ;; where filenames are files to which patch would have applied the patch; | |
153 | ;; marker1 delimits the beginning of the corresponding patch and marker2 does | |
154 | ;; it for the end. | |
155 | (ediff-defvar-local ediff-patch-map nil "") | |
156 | ||
157 | ;; strip prefix from filename | |
158 | ;; returns /dev/null, if can't strip prefix | |
159 | (defsubst ediff-file-name-sans-prefix (filename prefix) | |
160 | (save-match-data | |
161 | (if (string-match (concat "^" prefix) filename) | |
162 | (substring filename (match-end 0)) | |
163 | (concat "/null/" filename)))) | |
164 | ||
165 | ||
166 | ||
167 | ;; no longer used | |
168 | ;; return the number of matches of regexp in buf starting from the beginning | |
169 | (defun ediff-count-matches (regexp buf) | |
e756eb9f | 170 | (ediff-with-current-buffer buf |
fce30d79 MK |
171 | (let ((count 0) opoint) |
172 | (save-excursion | |
173 | (goto-char (point-min)) | |
174 | (while (and (not (eobp)) | |
175 | (progn (setq opoint (point)) | |
176 | (re-search-forward regexp nil t))) | |
177 | (if (= opoint (point)) | |
178 | (forward-char 1) | |
179 | (setq count (1+ count))))) | |
180 | count))) | |
181 | ||
182 | ;; Scan BUF (which is supposed to contain a patch) and make a list of the form | |
183 | ;; ((filename1 marker1 marker2) (filename2 marker1 marker2) ...) | |
184 | ;; where filenames are files to which patch would have applied the patch; | |
185 | ;; marker1 delimits the beginning of the corresponding patch and marker2 does | |
186 | ;; it for the end. This list is then assigned to ediff-patch-map. | |
187 | ;; Returns the number of elements in the list ediff-patch-map | |
188 | (defun ediff-map-patch-buffer (buf) | |
e756eb9f | 189 | (ediff-with-current-buffer buf |
fce30d79 MK |
190 | (let ((count 0) |
191 | (mark1 (move-marker (make-marker) (point-min))) | |
192 | (mark1-end (point-min)) | |
193 | (possible-file-names '("/dev/null" . "/dev/null")) | |
194 | mark2-end mark2 filenames | |
195 | beg1 beg2 end1 end2 | |
196 | patch-map opoint) | |
197 | (save-excursion | |
198 | (goto-char (point-min)) | |
199 | (setq opoint (point)) | |
200 | (while (and (not (eobp)) | |
201 | (re-search-forward ediff-context-diff-label-regexp nil t)) | |
202 | (if (= opoint (point)) | |
203 | (forward-char 1) ; ensure progress towards the end | |
204 | (setq mark2 (move-marker (make-marker) (match-beginning 0)) | |
205 | mark2-end (match-end 0) | |
a8b7f4b9 | 206 | beg1 (or (match-beginning 2) (match-beginning 4)) |
92c51e07 MK |
207 | end1 (or (match-end 2) (match-end 4)) |
208 | beg2 (or (match-beginning 3) (match-beginning 5)) | |
209 | end2 (or (match-end 3) (match-end 5))) | |
fce30d79 MK |
210 | ;; possible-file-names is holding the new file names until we |
211 | ;; insert the old file name in the patch map | |
212 | ;; It is a pair (filename from 1st header line . fn from 2nd line) | |
213 | (setq possible-file-names | |
214 | (cons (if (and beg1 end1) | |
215 | (buffer-substring beg1 end1) | |
216 | "/dev/null") | |
217 | (if (and beg2 end2) | |
218 | (buffer-substring beg2 end2) | |
219 | "/dev/null"))) | |
220 | ;; check for any `Index:' or `Prereq:' lines, but don't use them | |
221 | (if (re-search-backward "^Index:" mark1-end 'noerror) | |
222 | (move-marker mark2 (match-beginning 0))) | |
223 | (if (re-search-backward "^Prereq:" mark1-end 'noerror) | |
224 | (move-marker mark2 (match-beginning 0))) | |
225 | ||
226 | (goto-char mark2-end) | |
227 | ||
228 | (if filenames | |
229 | (setq patch-map (cons (list filenames mark1 mark2) patch-map))) | |
230 | (setq mark1 mark2 | |
231 | mark1-end mark2-end | |
232 | filenames possible-file-names)) | |
233 | (setq opoint (point) | |
234 | count (1+ count)))) | |
235 | (setq mark2 (point-max-marker) | |
236 | patch-map (cons (list possible-file-names mark1 mark2) patch-map)) | |
237 | (setq ediff-patch-map (nreverse patch-map)) | |
238 | count))) | |
239 | ||
240 | ;; Fix up the file names in the list using the argument FILENAME | |
241 | ;; Algorithm: find the first file's directory and cut it out from each file | |
242 | ;; name in the patch. Prepend the directory of FILENAME to each file in the | |
243 | ;; patch. In addition, the first file in the patch is replaced by FILENAME. | |
244 | ;; Each file is actually a file-pair of files found in the context diff header | |
245 | ;; In the end, for each pair, we select the shortest existing file. | |
246 | ;; Note: Ediff doesn't recognize multi-file patches that are separated | |
247 | ;; with the `Index:' line. It treats them as a single-file patch. | |
248 | ;; | |
249 | ;; Executes inside the patch buffer | |
250 | (defun ediff-fixup-patch-map (filename) | |
251 | (setq filename (expand-file-name filename)) | |
252 | (let ((actual-dir (if (file-directory-p filename) | |
253 | ;; directory part of filename | |
254 | (file-name-as-directory filename) | |
255 | (file-name-directory filename))) | |
256 | ;; directory part of the first file in the patch | |
257 | (base-dir1 (file-name-directory (car (car (car ediff-patch-map))))) | |
258 | (base-dir2 (file-name-directory (cdr (car (car ediff-patch-map))))) | |
259 | ) | |
260 | ||
261 | ;; chop off base-dirs | |
262 | (mapcar (function (lambda (triple) | |
263 | (or (string= (car (car triple)) "/dev/null") | |
264 | (setcar (car triple) | |
265 | (ediff-file-name-sans-prefix | |
266 | (car (car triple)) base-dir1))) | |
267 | (or (string= (cdr (car triple)) "/dev/null") | |
268 | (setcdr (car triple) | |
269 | (ediff-file-name-sans-prefix | |
270 | (cdr (car triple)) base-dir2))) | |
271 | )) | |
272 | ediff-patch-map) | |
273 | ||
274 | ;; take the given file name into account | |
275 | (or (file-directory-p filename) | |
276 | (string= "/dev/null" filename) | |
277 | (progn | |
278 | (setcar (car ediff-patch-map) | |
279 | (cons (file-name-nondirectory filename) | |
280 | (file-name-nondirectory filename))))) | |
281 | ||
282 | ;; prepend actual-dir | |
283 | (mapcar (function (lambda (triple) | |
284 | (if (and (string-match "^/null/" (car (car triple))) | |
285 | (string-match "^/null/" (cdr (car triple)))) | |
286 | ;; couldn't strip base-dir1 and base-dir2 | |
287 | ;; hence, something wrong | |
288 | (progn | |
289 | (with-output-to-temp-buffer ediff-msg-buffer | |
290 | (princ | |
291 | (format " | |
292 | The patch file contains a context diff for | |
293 | %s | |
294 | %s | |
fce30d79 MK |
295 | However, Ediff cannot infer the name of the actual file |
296 | to be patched on your system. If you know the correct file name, | |
297 | please enter it now. | |
298 | ||
299 | If you don't know and still would like to apply patches to | |
300 | other files, enter /dev/null | |
301 | " | |
302 | (substring (car (car triple)) 6) | |
303 | (substring (cdr (car triple)) 6)))) | |
304 | (let ((directory t) | |
305 | user-file) | |
306 | (while directory | |
307 | (setq user-file | |
308 | (read-file-name | |
309 | "Please enter file name: " | |
310 | actual-dir actual-dir t)) | |
311 | (if (not (file-directory-p user-file)) | |
312 | (setq directory nil) | |
313 | (setq directory t) | |
314 | (beep) | |
315 | (message "%s is a directory" user-file) | |
316 | (sit-for 2))) | |
317 | (setcar triple (cons user-file user-file)))) | |
318 | (setcar (car triple) | |
319 | (expand-file-name | |
320 | (concat actual-dir (car (car triple))))) | |
321 | (setcdr (car triple) | |
322 | (expand-file-name | |
323 | (concat actual-dir (cdr (car triple)))))) | |
324 | )) | |
325 | ediff-patch-map) | |
326 | ;; check for the shorter existing file in each pair and discard the other | |
327 | ;; one | |
328 | (mapcar (function (lambda (triple) | |
329 | (let* ((file1 (car (car triple))) | |
330 | (file2 (cdr (car triple))) | |
331 | (f1-exists (file-exists-p file1)) | |
332 | (f2-exists (file-exists-p file2))) | |
333 | (cond | |
334 | ((and (< (length file2) (length file1)) | |
335 | f2-exists) | |
336 | (setcar triple file2)) | |
337 | ((and (< (length file1) (length file2)) | |
338 | f1-exists) | |
339 | (setcar triple file1)) | |
340 | ((and f1-exists f2-exists | |
341 | (string= file1 file2)) | |
342 | (setcar triple file1)) | |
343 | ((and f1-exists f2-exists) | |
344 | (with-output-to-temp-buffer ediff-msg-buffer | |
345 | (princ (format " | |
346 | Ediff has inferred that | |
347 | %s | |
348 | %s | |
bd698e98 | 349 | are two possible targets for applying the patch. |
fce30d79 MK |
350 | Both files seem to be plausible alternatives. |
351 | ||
352 | Please advice: | |
353 | Type `y' to use %s as the target; | |
354 | Type `n' to use %s as the target. | |
355 | " | |
356 | file1 file2 file2 file1))) | |
357 | (setcar triple | |
358 | (if (y-or-n-p (format "Use %s ? " file2)) | |
359 | file2 file1))) | |
360 | (f2-exists (setcar triple file2)) | |
361 | (f1-exists (setcar triple file1)) | |
362 | (t | |
363 | (with-output-to-temp-buffer ediff-msg-buffer | |
bd698e98 MK |
364 | (princ "\nEdiff has inferred that") |
365 | (if (string= file1 file2) | |
366 | (princ (format " | |
fce30d79 | 367 | %s |
bd698e98 MK |
368 | is the target for this patch. However, this file does not exist." |
369 | file1)) | |
370 | (princ (format " | |
fce30d79 | 371 | %s |
bd698e98 MK |
372 | %s |
373 | are two possible targets for this patch. However, these files do not exist." | |
374 | file1 file2))) | |
375 | (princ " | |
376 | \nPlease enter an alternative patch target ...\n")) | |
fce30d79 MK |
377 | (let ((directory t) |
378 | target) | |
379 | (while directory | |
380 | (setq target (read-file-name | |
381 | "Please enter a patch target: " | |
382 | actual-dir actual-dir t)) | |
383 | (if (not (file-directory-p target)) | |
384 | (setq directory nil) | |
385 | (beep) | |
386 | (message "%s is a directory" target) | |
387 | (sit-for 2))) | |
388 | (setcar triple target))))))) | |
389 | ediff-patch-map) | |
390 | )) | |
391 | ||
392 | (defun ediff-show-patch-diagnostics () | |
393 | (interactive) | |
394 | (cond ((window-live-p ediff-window-A) | |
395 | (set-window-buffer ediff-window-A ediff-patch-diagnostics)) | |
396 | ((window-live-p ediff-window-B) | |
397 | (set-window-buffer ediff-window-B ediff-patch-diagnostics)) | |
398 | (t (display-buffer ediff-patch-diagnostics 'not-this-window)))) | |
399 | ||
400 | (defun ediff-get-patch-buffer () | |
401 | "Obtain patch buffer. If patch is already in a buffer---use it. | |
402 | Else, read patch file into a new buffer." | |
403 | (let ((dir (cond (ediff-patch-default-directory) ; try patch default dir | |
404 | (ediff-use-last-dir ediff-last-dir-patch) | |
405 | (t default-directory))) | |
406 | patch-buf) | |
bd698e98 MK |
407 | (if (let ((last-nonmenu-event t) ; Emacs: don't use dialog box |
408 | last-command-event) ; XEmacs: don't use dialog box | |
409 | (y-or-n-p "Is the patch already in a buffer? ")) | |
fce30d79 MK |
410 | (setq patch-buf |
411 | (get-buffer | |
412 | (read-buffer | |
413 | "Which buffer contains the patch? " | |
bd698e98 MK |
414 | (ediff-other-buffer |
415 | (if (eq (next-window (selected-window)) (selected-window)) | |
416 | ;; only one window in frame --- don't skip current buff | |
417 | "" | |
418 | ;; >1 window --- skip current buff, assuming this is the one | |
419 | ;; to patch, not the one that has the patch | |
420 | (current-buffer))) | |
421 | 'must-match))) | |
fce30d79 MK |
422 | (setq patch-buf |
423 | (find-file-noselect | |
92c51e07 MK |
424 | (read-file-name "Which file contains the patch? " |
425 | dir nil 'must-match)))) | |
fce30d79 | 426 | |
e756eb9f | 427 | (ediff-with-current-buffer patch-buf |
fce30d79 MK |
428 | (goto-char (point-min)) |
429 | (or (ediff-get-visible-buffer-window patch-buf) | |
430 | (progn | |
431 | (pop-to-buffer patch-buf 'other-window) | |
432 | (select-window (previous-window))))) | |
433 | (ediff-map-patch-buffer patch-buf) | |
434 | patch-buf)) | |
435 | ||
436 | ;; Dispatch the right patch file function: regular or meta-level, | |
437 | ;; depending on how many patches are in the patch file. | |
438 | ;; At present, there is no support for meta-level patches. | |
439 | ;; Should return either the ctl buffer or the meta-buffer | |
440 | (defun ediff-dispatch-file-patching-job (patch-buf filename | |
441 | &optional startup-hooks) | |
e756eb9f | 442 | (ediff-with-current-buffer patch-buf |
fce30d79 MK |
443 | ;; relativize names in the patch with respect to source-file |
444 | (ediff-fixup-patch-map filename) | |
445 | (if (< (length ediff-patch-map) 2) | |
446 | (ediff-patch-file-internal | |
447 | patch-buf | |
448 | (if (and (not (string-match "^/dev/null" (car (car ediff-patch-map)))) | |
449 | (> (length (car (car ediff-patch-map))) 1)) | |
450 | (car (car ediff-patch-map)) | |
451 | filename) | |
452 | startup-hooks) | |
453 | (ediff-multi-patch-internal patch-buf startup-hooks)) | |
454 | )) | |
455 | ||
456 | ||
bd698e98 MK |
457 | ;; When patching a buffer, never change the orig file. Instead, create a new |
458 | ;; buffer, ***_patched, even if the buff visits a file. | |
459 | ;; Users who want to actually patch the buffer should use | |
460 | ;; ediff-patch-file, not ediff-patch-buffer. | |
461 | (defun ediff-patch-buffer-internal (patch-buf | |
462 | buf-to-patch-name | |
463 | &optional startup-hooks) | |
fce30d79 | 464 | (let* ((buf-to-patch (get-buffer buf-to-patch-name)) |
bd698e98 | 465 | (visited-file (if buf-to-patch (buffer-file-name buf-to-patch))) |
fce30d79 | 466 | (buf-mod-status (buffer-modified-p buf-to-patch)) |
e756eb9f | 467 | (multifile-patch-p (> (length (ediff-with-current-buffer patch-buf |
fce30d79 MK |
468 | ediff-patch-map)) 1)) |
469 | default-dir file-name ctl-buf) | |
bd698e98 MK |
470 | (if multifile-patch-p |
471 | (error | |
472 | "Can't apply multi-file patches to buffers that visit no files")) | |
473 | ||
474 | ;; create a temp file to patch | |
475 | (ediff-with-current-buffer buf-to-patch | |
476 | (setq default-dir default-directory) | |
477 | (setq file-name (ediff-make-temp-file buf-to-patch)) | |
478 | ;; temporarily switch visited file name, if any | |
479 | (set-visited-file-name file-name) | |
480 | ;; don't create auto-save file, if buff was visiting a file | |
481 | (or visited-file | |
482 | (setq buffer-auto-save-file-name nil)) | |
483 | ;; don't confuse the user with a new bufname | |
484 | (rename-buffer buf-to-patch-name) | |
485 | (set-buffer-modified-p nil) | |
486 | (set-visited-file-modtime) ; sync buffer and temp file | |
487 | (setq default-directory default-dir) | |
488 | ) | |
489 | ||
fce30d79 MK |
490 | ;; dispatch a patch function |
491 | (setq ctl-buf (ediff-dispatch-file-patching-job | |
492 | patch-buf file-name startup-hooks)) | |
493 | ||
bd698e98 MK |
494 | (ediff-with-current-buffer ctl-buf |
495 | (delete-file (buffer-file-name ediff-buffer-A)) | |
496 | (delete-file (buffer-file-name ediff-buffer-B)) | |
497 | (ediff-with-current-buffer ediff-buffer-A | |
498 | (if default-dir (setq default-directory default-dir)) | |
499 | (set-visited-file-name visited-file) ; visited-file might be nil | |
500 | (rename-buffer buf-to-patch-name) | |
501 | (set-buffer-modified-p buf-mod-status)) | |
502 | (ediff-with-current-buffer ediff-buffer-B | |
503 | (setq buffer-auto-save-file-name nil) ; don't create auto-save file | |
504 | (if default-dir (setq default-directory default-dir)) | |
505 | (set-visited-file-name nil) | |
506 | (rename-buffer (ediff-unique-buffer-name | |
507 | (concat buf-to-patch-name "_patched") "")) | |
508 | (set-buffer-modified-p t))) | |
fce30d79 MK |
509 | )) |
510 | ||
bd698e98 MK |
511 | |
512 | ;; Traditional patch has weird return codes. | |
513 | ;; GNU and Posix return 1 if some hanks failed and 2 in case of trouble. | |
514 | ;; 0 is a good code in all cases. | |
515 | ;; We'll do the concervative thing. | |
516 | (defun ediff-patch-return-code-ok (code) | |
517 | (eq code 0)) | |
518 | ;;; (if (eq (ediff-test-patch-utility) 'traditional) | |
519 | ;;; (eq code 0) | |
520 | ;;; (not (eq code 2)))) | |
521 | ||
fce30d79 MK |
522 | (defun ediff-patch-file-internal (patch-buf source-filename |
523 | &optional startup-hooks) | |
524 | (setq source-filename (expand-file-name source-filename)) | |
525 | ||
92c51e07 | 526 | (let* ((shell-file-name ediff-shell) |
fce30d79 MK |
527 | (patch-diagnostics (get-buffer-create "*ediff patch diagnostics*")) |
528 | ;; ediff-find-file may use a temp file to do the patch | |
529 | ;; so, we save source-filename and true-source-filename as a var | |
530 | ;; that initially is source-filename but may be changed to a temp | |
531 | ;; file for the purpose of patching. | |
532 | (true-source-filename source-filename) | |
533 | (target-filename source-filename) | |
92c51e07 | 534 | target-buf buf-to-patch file-name-magic-p |
e756eb9f | 535 | patch-return-code ctl-buf backup-style aux-wind) |
fce30d79 | 536 | |
bd698e98 | 537 | (if (string-match "V" ediff-patch-options) |
fce30d79 MK |
538 | (error |
539 | "Ediff doesn't take the -V option in `ediff-patch-options'--sorry")) | |
540 | ||
541 | ;; Make a temp file, if source-filename has a magic file handler (or if | |
542 | ;; it is handled via auto-mode-alist and similar magic). | |
543 | ;; Check if there is a buffer visiting source-filename and if they are in | |
544 | ;; sync; arrange for the deletion of temp file. | |
545 | (ediff-find-file 'true-source-filename 'buf-to-patch | |
546 | 'ediff-last-dir-patch 'startup-hooks) | |
547 | ||
548 | ;; Check if source file name has triggered black magic, such as file name | |
549 | ;; handlers or auto mode alist, and make a note of it. | |
550 | ;; true-source-filename should be either the original name or a | |
551 | ;; temporary file where we put the after-product of the file handler. | |
552 | (setq file-name-magic-p (not (equal (file-truename true-source-filename) | |
553 | (file-truename source-filename)))) | |
554 | ||
bf5d92c5 MK |
555 | ;; Checkout orig file, if necessary, so that the patched file |
556 | ;; could be checked back in. | |
557 | (ediff-maybe-checkout buf-to-patch) | |
fce30d79 | 558 | |
e756eb9f | 559 | (ediff-with-current-buffer patch-diagnostics |
fce30d79 MK |
560 | (insert-buffer patch-buf) |
561 | (message "Applying patch ... ") | |
562 | ;; fix environment for gnu patch, so it won't make numbered extensions | |
563 | (setq backup-style (getenv "VERSION_CONTROL")) | |
564 | (setenv "VERSION_CONTROL" nil) | |
92c51e07 MK |
565 | (setq patch-return-code |
566 | (call-process-region | |
567 | (point-min) (point-max) | |
568 | shell-file-name | |
569 | t ; delete region (which contains the patch | |
570 | t ; insert output (patch diagnostics) in current buffer | |
571 | nil ; don't redisplay | |
572 | shell-command-switch ; usually -c | |
573 | (format "%s %s %s %s" | |
574 | ediff-patch-program | |
575 | ediff-patch-options | |
576 | ediff-backup-specs | |
577 | (expand-file-name true-source-filename)) | |
578 | )) | |
579 | ||
fce30d79 MK |
580 | ;; restore environment for gnu patch |
581 | (setenv "VERSION_CONTROL" backup-style)) | |
582 | ||
583 | (message "Applying patch ... done") | |
584 | (message "") | |
585 | ||
586 | (switch-to-buffer patch-diagnostics) | |
587 | (sit-for 0) ; synchronize - let the user see diagnostics | |
588 | ||
bd698e98 | 589 | (or (and (ediff-patch-return-code-ok patch-return-code) |
92c51e07 MK |
590 | (file-exists-p |
591 | (concat true-source-filename ediff-backup-extension))) | |
592 | (progn | |
593 | (with-output-to-temp-buffer ediff-msg-buffer | |
1e70790f | 594 | (princ (format |
bd698e98 MK |
595 | "Patch program has failed due to a bad patch file, |
596 | it couldn't apply all hunks, OR | |
597 | it couldn't create the backup for the file being patched. | |
92c51e07 | 598 | |
1e70790f MK |
599 | The former could be caused by a corrupt patch file or because the %S |
600 | program doesn't understand the format of the patch file in use. | |
92c51e07 | 601 | |
1e70790f | 602 | The second problem might be due to an incompatibility among these settings: |
bd698e98 MK |
603 | ediff-patch-program = %S ediff-patch-options = %S |
604 | ediff-backup-extension = %S ediff-backup-specs = %S | |
92c51e07 | 605 | |
92c51e07 | 606 | See Ediff on-line manual for more details on these variables. |
bd698e98 MK |
607 | In particular, check the documentation for `ediff-backup-specs'. |
608 | ||
609 | In any of the above cases, Ediff doesn't compare files automatically. | |
610 | However, if the patch was applied partially and the backup file was created, | |
611 | you can still examine the changes via M-x ediff-files" | |
1e70790f MK |
612 | ediff-patch-program |
613 | ediff-patch-program | |
92c51e07 MK |
614 | ediff-patch-options |
615 | ediff-backup-extension | |
616 | ediff-backup-specs | |
1e70790f | 617 | ))) |
92c51e07 MK |
618 | (beep 1) |
619 | (if (setq aux-wind (get-buffer-window ediff-msg-buffer)) | |
620 | (progn | |
621 | (select-window aux-wind) | |
622 | (goto-char (point-max)))) | |
1e70790f | 623 | (switch-to-buffer-other-window patch-diagnostics) |
92c51e07 MK |
624 | (error "Patch appears to have failed"))) |
625 | ||
fce30d79 MK |
626 | ;; If black magic is involved, apply patch to a temp copy of the |
627 | ;; file. Otherwise, apply patch to the orig copy. If patch is applied | |
628 | ;; to temp copy, we name the result old-name_patched for local files | |
629 | ;; and temp-copy_patched for remote files. The orig file name isn't | |
630 | ;; changed, and the temp copy of the original is later deleted. | |
631 | ;; Without magic, the original file is renamed (usually into | |
632 | ;; old-name_orig) and the result of patching will have the same name as | |
633 | ;; the original. | |
634 | (if (not file-name-magic-p) | |
e756eb9f | 635 | (ediff-with-current-buffer buf-to-patch |
92c51e07 MK |
636 | (set-visited-file-name |
637 | (concat source-filename ediff-backup-extension)) | |
fce30d79 MK |
638 | (set-buffer-modified-p nil)) |
639 | ||
640 | ;; Black magic in effect. | |
641 | ;; If orig file was remote, put the patched file in the temp directory. | |
642 | ;; If orig file is local, put the patched file in the directory of | |
643 | ;; the orig file. | |
644 | (setq target-filename | |
645 | (concat | |
646 | (if (ediff-file-remote-p (file-truename source-filename)) | |
647 | true-source-filename | |
648 | source-filename) | |
649 | "_patched")) | |
650 | ||
651 | (rename-file true-source-filename target-filename t) | |
652 | ||
653 | ;; arrange that the temp copy of orig will be deleted | |
92c51e07 | 654 | (rename-file (concat true-source-filename ediff-backup-extension) |
fce30d79 MK |
655 | true-source-filename t)) |
656 | ||
657 | ;; make orig buffer read-only | |
658 | (setq startup-hooks | |
659 | (cons 'ediff-set-read-only-in-buf-A startup-hooks)) | |
660 | ||
661 | ;; set up a buf for the patched file | |
662 | (setq target-buf (find-file-noselect target-filename)) | |
663 | ||
664 | (setq ctl-buf | |
665 | (ediff-buffers-internal | |
666 | buf-to-patch target-buf nil | |
667 | startup-hooks 'epatch)) | |
e756eb9f | 668 | (ediff-with-current-buffer ctl-buf |
fce30d79 MK |
669 | (setq ediff-patchbufer patch-buf |
670 | ediff-patch-diagnostics patch-diagnostics)) | |
671 | ||
672 | (bury-buffer patch-diagnostics) | |
673 | (message "Type `P', if you need to see patch diagnostics") | |
674 | ctl-buf)) | |
675 | ||
676 | (defun ediff-multi-patch-internal (patch-buf &optional startup-hooks) | |
677 | (let (meta-buf) | |
678 | (setq startup-hooks | |
679 | ;; this sets various vars in the meta buffer inside | |
680 | ;; ediff-prepare-meta-buffer | |
681 | (cons (` (lambda () | |
682 | ;; tell what to do if the user clicks on a session record | |
683 | (setq ediff-session-action-function | |
684 | 'ediff-patch-file-form-meta | |
685 | ediff-meta-patchbufer patch-buf) | |
686 | )) | |
687 | startup-hooks)) | |
688 | (setq meta-buf (ediff-prepare-meta-buffer | |
689 | 'ediff-filegroup-action | |
e756eb9f | 690 | (ediff-with-current-buffer patch-buf |
fce30d79 MK |
691 | ;; nil replaces a regular expression |
692 | (cons (list nil (format "%S" patch-buf)) | |
693 | ediff-patch-map)) | |
694 | "*Ediff Session Group Panel" | |
695 | 'ediff-redraw-directory-group-buffer | |
696 | 'ediff-multifile-patch | |
697 | startup-hooks)) | |
698 | (ediff-show-meta-buffer meta-buf) | |
699 | )) | |
700 | ||
701 | ||
702 | ||
703 | ||
704 | ;;; Local Variables: | |
705 | ;;; eval: (put 'ediff-defvar-local 'lisp-indent-hook 'defun) | |
e756eb9f MK |
706 | ;;; eval: (put 'ediff-with-current-buffer 'lisp-indent-hook 1) |
707 | ;;; eval: (put 'ediff-with-current-buffer 'edebug-form-spec '(form body)) | |
fce30d79 MK |
708 | ;;; End: |
709 | ||
fce30d79 | 710 | ;;; ediff-ptch.el ends here |