1 ;;; vc-rcs.el --- support for RCS version-control -*- lexical-binding:t -*-
3 ;; Copyright (C) 1992-2016 Free Software Foundation, Inc.
5 ;; Author: FSF (see vc.el for full credits)
6 ;; Maintainer: Andre Spiegel <spiegel@gnu.org>
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software: you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation, either version 3 of the License, or
14 ;; (at your option) any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
28 ;; Some features will not work with ancient RCS versions. Where
29 ;; appropriate, VC finds out which version you have, and allows or
30 ;; disallows those features.
32 ;; You can support the RCS -x option by customizing vc-rcs-master-templates.
37 ;;; Customization options
49 (defcustom vc-rcs-release nil
50 "The release number of your RCS installation, as a string.
51 If nil, VC itself computes this value when it is first needed."
52 :type '(choice (const :tag "Auto" nil)
53 (string :tag "Specified")
54 (const :tag "Unknown" unknown))
57 (defcustom vc-rcs-register-switches nil
58 "Switches for registering a file in RCS.
59 A string or list of strings passed to the checkin program by
60 \\[vc-register]. If nil, use the value of `vc-register-switches'.
61 If t, use no switches."
62 :type '(choice (const :tag "Unspecified" nil)
64 (string :tag "Argument String")
65 (repeat :tag "Argument List" :value ("") string))
69 (defcustom vc-rcs-diff-switches nil
70 "String or list of strings specifying switches for RCS diff under VC.
71 If nil, use the value of `vc-diff-switches'. If t, use no switches."
72 :type '(choice (const :tag "Unspecified" nil)
74 (string :tag "Argument String")
75 (repeat :tag "Argument List" :value ("") string))
79 (defcustom vc-rcs-header '("$Id\ $")
80 "Header keywords to be inserted by `vc-insert-headers'."
81 :type '(repeat string)
82 :version "24.1" ; no longer consult the obsolete vc-header-alist
85 (defcustom vc-rcsdiff-knows-brief nil
86 "Indicates whether rcsdiff understands the --brief option.
87 The value is either `yes', `no', or nil. If it is nil, VC tries
88 to use --brief and sets this variable to remember whether it worked."
89 :type '(choice (const :tag "Work out" nil) (const yes) (const no))
92 ;; This needs to be autoloaded because vc-rcs-registered uses it (via
93 ;; vc-default-registered), and vc-hooks needs to be able to check
94 ;; for a registered backend without loading every backend.
96 (defcustom vc-rcs-master-templates
97 (purecopy '("%sRCS/%s,v" "%s%s,v" "%sRCS/%s"))
98 "Where to look for RCS master files.
99 For a description of possible values, see `vc-check-master-templates'."
100 :type '(choice (const :tag "Use standard RCS file names"
101 '("%sRCS/%s,v" "%s%s,v" "%sRCS/%s"))
102 (repeat :tag "User-specified"
109 ;;; Properties of the backend
111 (defun vc-rcs-revision-granularity () 'file)
113 (defun vc-rcs-checkout-model (files)
114 "RCS-specific version of `vc-checkout-model'."
115 (let ((file (if (consp files) (car files) files))
117 (when vc-consult-headers
118 (vc-file-setprop file 'vc-checkout-model nil)
119 (vc-rcs-consult-headers file)
120 (setq result (vc-file-getprop file 'vc-checkout-model)))
122 (progn (vc-rcs-fetch-master-state file)
123 (vc-file-getprop file 'vc-checkout-model))
124 ;; For non-existing files we assume strict locking.
128 ;;; State-querying functions
131 ;; The autoload cookie below places vc-rcs-registered directly into
132 ;; loaddefs.el, so that vc-rcs.el does not need to be loaded for
133 ;; every file that is visited.
136 (defun vc-rcs-registered (f) (vc-default-registered 'RCS f)))
138 (defun vc-rcs-state (file)
139 "Implementation of `vc-state' for RCS."
140 (if (not (vc-rcs-registered file))
142 (or (boundp 'vc-rcs-headers-result)
143 (and vc-consult-headers
144 (vc-rcs-consult-headers file)))
146 ;; vc-working-revision might not be known; in that case the
147 ;; property is nil. vc-rcs-fetch-master-state knows how to
149 (vc-rcs-fetch-master-state file
150 (vc-file-getprop file
151 'vc-working-revision))))
152 (if (not (eq state 'up-to-date))
154 (if (vc-rcs-workfile-unchanged-p file)
156 (if (eq (vc-rcs-checkout-model (list file)) 'locking)
160 (autoload 'vc-expand-dirs "vc")
162 (defun vc-rcs-dir-status-files (dir files update-function)
163 (if (not files) (setq files (vc-expand-dirs (list dir) 'RCS)))
166 (let ((state (vc-state file))
167 (frel (file-relative-name file)))
168 (when (and (eq (vc-backend file) 'RCS)
169 (not (eq state 'up-to-date)))
170 (push (list frel state) result))))
171 (funcall update-function result)))
173 (defun vc-rcs-working-revision (file)
174 "RCS-specific version of `vc-working-revision'."
175 (or (and vc-consult-headers
176 (vc-rcs-consult-headers file)
177 (vc-file-getprop file 'vc-working-revision))
179 (vc-rcs-fetch-master-state file)
180 (vc-file-getprop file 'vc-working-revision))))
182 (autoload 'vc-master-name "vc-filewise")
184 (defun vc-rcs-latest-on-branch-p (file &optional version)
185 "Return non-nil if workfile version of FILE is the latest on its branch.
186 When VERSION is given, perform check for that version."
187 (unless version (setq version (vc-working-revision file)))
190 (if (vc-rcs-trunk-p version)
192 ;; Compare VERSION to the head version number.
193 (vc-insert-file (vc-master-name file) "^[0-9]")
194 (vc-parse-buffer "^head[ \t\n]+\\([^;]+\\);" 1))
195 ;; If we are not on the trunk, we need to examine the
196 ;; whole current branch.
197 (vc-insert-file (vc-master-name file) "^desc")
198 (vc-rcs-find-most-recent-rev (vc-branch-part version))))))
200 (defun vc-rcs-workfile-unchanged-p (file)
201 "Has FILE remained unchanged since last checkout?"
202 ;; Try to use rcsdiff --brief. If rcsdiff does not understand that,
203 ;; do a double take and remember the fact for the future
204 (let* ((version (concat "-r" (vc-working-revision file)))
205 (status (if (eq vc-rcsdiff-knows-brief 'no)
206 (vc-do-command "*vc*" 1 "rcsdiff" file version)
207 (vc-do-command "*vc*" 2 "rcsdiff" file "--brief" version))))
209 (if (not vc-rcsdiff-knows-brief)
210 (setq vc-rcsdiff-knows-brief 'no
211 status (vc-do-command "*vc*" 1 "rcsdiff" file version))
212 (error "rcsdiff failed"))
213 (if (not vc-rcsdiff-knows-brief) (setq vc-rcsdiff-knows-brief 'yes)))
214 ;; The workfile is unchanged if rcsdiff found no differences.
219 ;;; State-changing functions
222 (defun vc-rcs-create-repo ()
223 "Create a new RCS repository."
224 ;; RCS is totally file-oriented, so all we have to do is make the directory.
225 (make-directory "RCS"))
227 (autoload 'vc-switches "vc")
229 (defun vc-rcs-register (files &optional comment)
230 "Register FILES into the RCS version-control system.
231 Automatically retrieve a read-only version of the file with keywords expanded.
232 COMMENT can be used to provide an initial description for each FILES.
233 Passes either `vc-rcs-register-switches' or `vc-register-switches'
237 (and (not (file-exists-p
238 (setq subdir (expand-file-name "RCS"
239 (file-name-directory file)))))
240 (not (directory-files (file-name-directory file)
242 (yes-or-no-p "Create RCS subdirectory? ")
243 (make-directory subdir))
244 (apply #'vc-do-command "*vc*" 0 "ci" file
245 ;; if available, use the secure registering option
246 (and (vc-rcs-release-p "5.6.4") "-i")
248 ;; Some old MS-Windows ports of RCS crash when "ci -i" is
249 ;; invoked without -t; indulge them.
250 (concat "-t-" (or comment ""))
251 (vc-switches 'RCS 'register))
252 ;; parse output to find master file name and workfile version
253 (with-current-buffer "*vc*"
254 (goto-char (point-min))
256 (if (looking-at (concat "^\\(.*\\) <-- "
257 (file-name-nondirectory file)))
259 ;; if we couldn't find the master name,
260 ;; run vc-rcs-registered to get it
261 ;; (will be stored into the vc-master-name property)
262 (vc-rcs-registered file)
263 (vc-file-setprop file 'vc-master-name
264 (if (file-name-absolute-p name)
268 (file-name-directory file))))))
269 (vc-file-setprop file 'vc-working-revision
270 (if (re-search-forward
271 "^initial revision: \\([0-9.]+\\).*\n"
273 (match-string 1))))))
275 (defun vc-rcs-responsible-p (file)
276 "Return non-nil if RCS thinks it would be responsible for registering FILE."
277 ;; TODO: check for all the patterns in vc-rcs-master-templates
278 (file-directory-p (expand-file-name "RCS"
279 (if (file-directory-p file)
281 (file-name-directory file)))))
283 (defun vc-rcs-receive-file (file rev)
284 "Implementation of receive-file for RCS."
285 (let ((checkout-model (vc-rcs-checkout-model (list file))))
286 (vc-rcs-register file "")
287 (when (eq checkout-model 'implicit)
288 (vc-rcs-set-non-strict-locking file))
289 (vc-rcs-set-default-branch file (concat rev ".1"))))
291 (defun vc-rcs-unregister (file)
292 "Unregister FILE from RCS.
293 If this leaves the RCS subdirectory empty, ask the user
294 whether to remove it."
295 (unless (memq (vc-state file) '(nil unregistered))
296 (let* ((master (vc-master-name file))
297 (dir (file-name-directory master))
298 (backup-info (find-backup-file-name master)))
299 (if (not backup-info)
301 (rename-file master (car backup-info) 'ok-if-already-exists)
302 (dolist (f (cdr backup-info)) (ignore-errors (delete-file f))))
303 (and (string= (file-name-nondirectory (directory-file-name dir)) "RCS")
304 ;; check whether RCS dir is empty, i.e. it does not
305 ;; contain any files except "." and ".."
306 (not (directory-files dir nil
307 "^\\([^.]\\|\\.[^.]\\|\\.\\.[^.]\\).*"))
308 (yes-or-no-p (format "Directory %s is empty; remove it? " dir))
309 (delete-directory dir)))))
311 (defun vc-rcs-checkin (files comment &optional rev)
312 "RCS-specific version of `vc-backend-checkin'."
313 (let ((switches (vc-switches 'RCS 'checkin)))
314 ;; Now operate on the files
315 (dolist (file (vc-expand-dirs files 'RCS))
316 (let ((old-version (vc-working-revision file)) new-version
317 (default-branch (vc-file-getprop file 'vc-rcs-default-branch)))
318 ;; Force branch creation if an appropriate
319 ;; default branch has been set.
322 (string-match (concat "^" (regexp-quote old-version) "\\.")
324 (setq rev default-branch)
325 (setq switches (cons "-f" switches)))
326 (if (and (not rev) old-version)
327 (setq rev (vc-branch-part old-version)))
328 (apply #'vc-do-command "*vc*" 0 "ci" (vc-master-name file)
329 ;; if available, use the secure check-in option
330 (and (vc-rcs-release-p "5.6.4") "-j")
332 (concat "-m" comment)
334 (vc-file-setprop file 'vc-working-revision nil)
336 ;; determine the new workfile version
338 (goto-char (point-min))
339 (when (or (re-search-forward
340 "new revision: \\([0-9.]+\\);" nil t)
342 "reverting to previous revision \\([0-9.]+\\)" nil t))
343 (setq new-version (match-string 1))
344 (vc-file-setprop file 'vc-working-revision new-version))
346 ;; if we got to a different branch, adjust the default
347 ;; branch accordingly
349 ((and old-version new-version
350 (not (string= (vc-branch-part old-version)
351 (vc-branch-part new-version))))
352 (vc-rcs-set-default-branch file
353 (if (vc-rcs-trunk-p new-version) nil
354 (vc-branch-part new-version)))
355 ;; If this is an old (pre-1992!) RCS release, we might have
356 ;; to remove a remaining lock.
357 (if (not (vc-rcs-release-p "5.6.2"))
358 ;; exit status of 1 is also accepted.
359 ;; It means that the lock was removed before.
360 (vc-do-command "*vc*" 1 "rcs" (vc-master-name file)
361 (concat "-u" old-version)))))))))
363 (defun vc-rcs-find-revision (file rev buffer)
364 (apply #'vc-do-command
365 (or buffer "*vc*") 0 "co" (vc-master-name file)
366 "-q" ;; suppress diagnostic output
368 (vc-switches 'RCS 'checkout)))
370 (defun vc-rcs-checkout (file &optional rev)
371 "Retrieve a copy of a saved version of FILE. If FILE is a directory,
372 attempt the checkout for all registered files beneath it."
373 (if (file-directory-p file)
374 (mapc 'vc-rcs-checkout (vc-expand-dirs (list file) 'RCS))
375 (let ((file-buffer (get-file-buffer file))
377 (message "Checking out %s..." file)
379 ;; Change buffers to get local value of vc-checkout-switches.
380 (if file-buffer (set-buffer file-buffer))
381 (setq switches (vc-switches 'RCS 'checkout))
382 ;; Save this buffer's default-directory
383 ;; and use save-excursion to make sure it is restored
384 ;; in the same buffer it was saved in.
385 (let ((default-directory default-directory))
387 ;; Adjust the default-directory so that the check-out creates
388 ;; the file in the right place.
389 (setq default-directory (file-name-directory file))
391 ;; if we should go to the head of the trunk,
392 ;; clear the default branch first
393 (and rev (string= rev "")
394 (vc-rcs-set-default-branch file nil))
395 ;; now do the checkout
396 (apply #'vc-do-command
397 "*vc*" 0 "co" (vc-master-name file)
398 ;; If locking is not strict, force to overwrite
399 ;; the writable workfile.
400 (if (eq (vc-rcs-checkout-model (list file)) 'implicit) "-f")
403 ;; a literal revision was specified
405 (let ((workrev (vc-working-revision file)))
409 ;; no revision specified:
410 ;; use current workfile version
413 (if (not (vc-rcs-trunk-p workrev))
414 ;; ... go to head of current branch
415 (vc-branch-part workrev)
416 ;; ... go to head of trunk
417 (vc-rcs-set-default-branch file
421 ;; determine the new workfile version
422 (with-current-buffer "*vc*"
424 (vc-parse-buffer "^revision \\([0-9.]+\\).*\n" 1)))
425 (vc-file-setprop file 'vc-working-revision new-version)
426 ;; if necessary, adjust the default branch
427 (and rev (not (string= rev ""))
428 (vc-rcs-set-default-branch
430 (if (vc-rcs-latest-on-branch-p file new-version)
431 (if (vc-rcs-trunk-p new-version) nil
432 (vc-branch-part new-version))
434 (message "Checking out %s...done" file))))))
436 (defun vc-rcs-revert (file &optional _contents-done)
437 "Revert FILE to the version it was based on. If FILE is a directory,
438 revert all registered files beneath it."
439 (if (file-directory-p file)
440 (mapc 'vc-rcs-revert (vc-expand-dirs (list file) 'RCS))
441 (vc-do-command "*vc*" 0 "co" (vc-master-name file) "-f"
442 (concat (if (eq (vc-state file) 'edited) "-u" "-r")
443 (vc-working-revision file)))))
445 (defun vc-rcs-merge-file (file)
446 "Accept a file merge request, prompting for revisions."
447 (let* ((first-revision
449 (concat "Merge " file " from branch or revision: ")
454 ((string= first-revision "")
455 (error "A starting RCS revision is required"))
457 (if (not (vc-branch-p first-revision))
458 (setq second-revision
460 "Second RCS revision: "
462 (concat (vc-branch-part first-revision) ".")))
463 ;; We want to merge an entire branch. Set revisions
464 ;; accordingly, so that vc-rcs-merge understands us.
465 (setq second-revision first-revision)
466 ;; first-revision must be the starting point of the branch
467 (setq first-revision (vc-branch-part first-revision)))))
468 (vc-rcs-merge file first-revision second-revision)))
470 (defun vc-rcs-merge (file first-version &optional second-version)
471 "Merge changes into current working copy of FILE.
472 The changes are between FIRST-VERSION and SECOND-VERSION."
473 (vc-do-command "*vc*" 1 "rcsmerge" (vc-master-name file)
474 "-kk" ; ignore keyword conflicts
475 (concat "-r" first-version)
476 (if second-version (concat "-r" second-version))))
478 (defun vc-rcs-steal-lock (file &optional rev)
479 "Steal the lock on the current workfile for FILE and revision REV.
480 If FILE is a directory, steal the lock on all registered files beneath it.
481 Needs RCS 5.6.2 or later for -M."
482 (if (file-directory-p file)
483 (mapc 'vc-rcs-steal-lock (vc-expand-dirs (list file) 'RCS))
484 (vc-do-command "*vc*" 0 "rcs" (vc-master-name file) "-M" (concat "-u" rev))
485 ;; Do a real checkout after stealing the lock, so that we see
487 (vc-do-command "*vc*" 0 "co" (vc-master-name file) "-f" (concat "-l" rev))
488 ;; Must clear any headers here because they wouldn't
489 ;; show that the file is locked now.
490 (let* ((filename (or file buffer-file-name))
491 (visited (find-buffer-visiting filename)))
493 (let ((context (vc-buffer-context)))
494 ;; save-excursion may be able to relocate point and mark
495 ;; properly. If it fails, vc-restore-buffer-context
496 ;; will give it a second try.
498 (vc-rcs-clear-headers))
499 (vc-restore-buffer-context context))
500 (set-buffer (find-file-noselect filename))
501 (vc-rcs-clear-headers)
502 (kill-buffer filename)))))
504 (defun vc-rcs-modify-change-comment (files rev comment)
505 "Modify the change comments change on FILES on a specified REV. If FILE is a
506 directory the operation is applied to all registered files beneath it."
507 (dolist (file (vc-expand-dirs files 'RCS))
508 (vc-do-command "*vc*" 0 "rcs" (vc-master-name file)
509 (concat "-m" rev ":" comment))))
513 ;;; History functions
516 (defun vc-rcs-print-log-cleanup ()
517 (let ((inhibit-read-only t))
518 (goto-char (point-max))
520 (while (looking-at "=*\n")
521 (delete-char (- (match-end 0) (match-beginning 0)))
523 (goto-char (point-min))
524 (when (looking-at "[\b\t\n\v\f\r ]+")
525 (delete-char (- (match-end 0) (match-beginning 0))))))
527 (defun vc-rcs-print-log (files buffer &optional _shortlog
528 _start-revision-ignored limit)
529 "Print commit log associated with FILES into specified BUFFER.
530 Remaining arguments are ignored.
531 If FILE is a directory the operation is applied to all registered
533 (vc-do-command (or buffer "*vc*") 0 "rlog"
534 (mapcar 'vc-master-name (vc-expand-dirs files 'RCS)))
535 (with-current-buffer (or buffer "*vc*")
536 (vc-rcs-print-log-cleanup))
537 (when limit 'limit-unsupported))
539 (defun vc-rcs-diff (files &optional oldvers newvers buffer _async)
540 "Get a difference report using RCS between two sets of files."
541 (apply #'vc-do-command (or buffer "*vc-diff*")
542 ;; The repo is local, so this is fast anyway.
544 "rcsdiff" (vc-expand-dirs files 'RCS)
546 (and oldvers (concat "-r" oldvers))
547 (and newvers (concat "-r" newvers)))
548 (vc-switches 'RCS 'diff))))
550 (defun vc-rcs-find-admin-dir (file)
551 "Return the administrative directory of FILE."
552 (vc-find-root file "RCS"))
554 (defun vc-rcs-comment-history (file)
555 "Return a string with all log entries stored in BACKEND for FILE."
556 (with-current-buffer "*vc*"
557 ;; Has to be written this way, this function is used by the CVS backend too
558 (vc-call-backend (vc-backend file) 'print-log (list file))
560 (let ((separator (concat "^-+\nrevision [0-9.]+\ndate: .*\n"
561 "\\(branches: .*;\n\\)?"
562 "\\(\\*\\*\\* empty log message \\*\\*\\*\n\\)?")))
563 (goto-char (point-max)) (forward-line -1)
564 (while (looking-at "=*\n")
565 (delete-char (- (match-end 0) (match-beginning 0)))
567 (goto-char (point-min))
568 (if (looking-at "[\b\t\n\v\f\r ]+")
569 (delete-char (- (match-end 0) (match-beginning 0))))
570 (goto-char (point-min))
571 (re-search-forward separator nil t)
572 (delete-region (point-min) (point))
573 (while (re-search-forward separator nil t)
574 (delete-region (match-beginning 0) (match-end 0))))
575 ;; Return the de-crufted comment list
578 (defun vc-rcs-annotate-command (file buffer &optional revision)
579 "Annotate FILE, inserting the results in BUFFER.
580 Optional arg REVISION is a revision to annotate from."
581 (vc-setup-buffer buffer)
582 ;; Aside from the "head revision on the trunk", the instructions for
583 ;; each revision on the trunk are an ordered list of kill and insert
584 ;; commands necessary to go from the chronologically-following
585 ;; revision to this one. That is, associated with revision N are
586 ;; edits that applied to revision N+1 would result in revision N.
588 ;; On a branch, however, (some) things are inverted: the commands
589 ;; listed are those necessary to go from the chronologically-preceding
590 ;; revision to this one. That is, associated with revision N are
591 ;; edits that applied to revision N-1 would result in revision N.
593 ;; So, to get per-line history info, we apply reverse-chronological
594 ;; edits, starting with the head revision on the trunk, all the way
595 ;; back through the initial revision (typically "1.1" or similar),
596 ;; then apply forward-chronological edits -- keeping track of which
597 ;; revision is associated with each inserted line -- until we reach
598 ;; the desired revision for display (which may be either on the trunk
600 (let* ((tree (with-temp-buffer
601 (insert-file-contents (vc-rcs-registered file))
603 (revisions (cdr (assq 'revisions tree)))
604 ;; The revision N whose instructions we currently are processing.
605 (cur (cdr (assq 'head (cdr (assq 'headers tree)))))
606 ;; Alist from the parse tree for N.
607 (meta (cdr (assoc cur revisions)))
608 ;; Point and temporary string, respectively.
610 ;; "Next-branch list". Nil means the desired revision to
611 ;; display lives on the trunk. Non-nil means it lives on a
612 ;; branch, in which case the value is a list of revision pairs
613 ;; (PARENT . CHILD), the first PARENT being on the trunk, that
614 ;; links each series of revisions in the path from the initial
615 ;; revision to the desired revision to display.
617 ;; "Path-accumulate-predicate plus revision/date/author".
618 ;; Until set, forward-chronological edits are not accumulated.
619 ;; Once set, its value (updated every revision) is used for
620 ;; the text property `:vc-rcs-r/d/a' for inserts during
621 ;; processing of forward-chronological instructions for N.
622 ;; See internal func `r/d/a'.
624 ;; List of forward-chronological instructions, each of the
625 ;; form: (POS . ACTION), where POS is a buffer position. If
626 ;; ACTION is a string, it is inserted, otherwise it is taken as
627 ;; the number of characters to be deleted.
629 ;; N+1. When `cur' is "", this is the initial revision.
633 (unless (assoc revision revisions)
634 (error "No such revision: %s" revision))
635 ;; Find which branches (if any) must be included in the edits.
638 (while (setq bpt (vc-branch-part par)
639 par (vc-branch-part bpt))
640 (setq kids (cdr (assq 'branches (cdr (assoc par revisions)))))
641 ;; A branchpoint may have multiple children. Find the right one.
642 (while (not (string= bpt (vc-branch-part (car kids))))
643 (setq kids (cdr kids)))
644 (push (cons par (car kids)) nbls)))
645 ;; Start with the full text.
647 (insert (cdr (assq 'text meta)))
648 ;; Apply reverse-chronological edits on the trunk, computing and
649 ;; accumulating forward-chronological edits after some point, for
651 (cl-flet ((r/d/a () (vector pre
652 (cdr (assq 'date meta))
653 (cdr (assq 'author meta)))))
654 (while (when (setq pre cur cur (cdr (assq 'next meta)))
655 (not (string= "" cur)))
657 ;; Start accumulating the forward-chronological edits when N+1
658 ;; on the trunk is either the desired revision to display, or
659 ;; the appropriate branchpoint for it. Do this before
660 ;; updating `meta' since `r/d/a' uses N+1's `meta' value.
661 prda (when (or prda (string= (if nbls (caar nbls) revision) pre))
663 meta (cdr (assoc cur revisions)))
664 ;; Edits in the parse tree specify a line number (in the buffer
665 ;; *BEFORE* editing occurs) to start from, but line numbers
666 ;; change as a result of edits. To DTRT, we apply edits in
667 ;; order of descending buffer position so that edits further
668 ;; down in the buffer occur first w/o corrupting specified
669 ;; buffer positions of edits occurring towards the beginning of
670 ;; the buffer. In this way we avoid using markers. A pleasant
671 ;; property of this approach is ability to push instructions
672 ;; onto `path' directly, w/o need to maintain rev boundaries.
673 (dolist (insn (cdr (assq :insn meta)))
674 (goto-char (point-min))
675 (forward-line (1- (pop insn)))
678 (`k (setq s (buffer-substring-no-properties
679 p (progn (forward-line (car insn))
682 (push `(,p . ,(propertize s :vc-rcs-r/d/a prda)) path))
683 (delete-region p (point)))
684 (`i (setq s (car insn))
686 (push `(,p . ,(length s)) path))
688 ;; For the initial revision, setting `:vc-rcs-r/d/a' directly is
689 ;; equivalent to pushing an insert instruction (of the entire buffer
690 ;; contents) onto `path' then erasing the buffer, but less wasteful.
691 (put-text-property (point-min) (point-max) :vc-rcs-r/d/a (r/d/a))
692 ;; Now apply the forward-chronological edits for the trunk.
694 (goto-char (pop insn))
698 ;; Now apply the forward-chronological edits (directly from the
699 ;; parse-tree) for the branch(es), if necessary. We re-use vars
700 ;; `pre' and `meta' for the sake of internal func `r/d/a'.
702 (setq pre (cdr (pop nbls)))
704 (setq meta (cdr (assoc pre revisions))
706 (dolist (insn (cdr (assq :insn meta)))
707 (goto-char (point-min))
708 (forward-line (1- (pop insn)))
711 (point) (progn (forward-line (car insn))
713 (`i (insert (propertize
716 (or prda (setq prda (r/d/a))))))))
717 (prog1 (not (string= (if nbls (caar nbls) revision) pre))
718 (setq pre (cdr (assq 'next meta)))))))))
719 ;; Lastly, for each line, insert at bol nicely-formatted history info.
720 ;; We do two passes to collect summary information used to minimize
721 ;; the annotation's usage of screen real-estate: (1) Consider rendered
722 ;; width of revision plus author together as a unit; and (2) Omit
723 ;; author entirely if all authors are the same as the user.
724 (let ((ht (make-hash-table :test 'eq))
725 (me (user-login-name))
729 (goto-char (point-max))
732 (setq rda (get-text-property (point) :vc-rcs-r/d/a))
733 (unless (gethash rda ht)
735 all-me (and all-me (string= a me)))
736 (puthash rda (setq w (+ (length (aref rda 0))
739 (setq maxw (max w maxw))))
740 (let ((padding (make-string maxw 32)))
741 (cl-flet ((pad (w) (substring-no-properties padding w))
742 (render (rda &rest ls)
745 (format-time-string "%Y-%m-%d" (aref rda 1))
749 :vc-annotate-prefix t
754 (puthash rda (render rda (pad w) ": ") ht))
756 (puthash rda (render rda " " (pad w) " " (aref rda 2) ": ") ht)))
759 (insert (gethash (get-text-property (point) :vc-rcs-r/d/a) ht))
762 (declare-function vc-annotate-convert-time "vc-annotate" (&optional time))
764 (defun vc-rcs-annotate-current-time ()
765 "Return the current time, based at midnight of the current day, and
766 encoded as fractional days."
767 (vc-annotate-convert-time
768 (apply #'encode-time 0 0 0 (nthcdr 3 (decode-time)))))
770 (defun vc-rcs-annotate-time ()
771 "Return the time of the next annotation (as fraction of days)
772 systime, or nil if there is none. Also, reposition point."
774 (prog1 (vc-annotate-convert-time
775 (aref (get-text-property (point) :vc-rcs-r/d/a) 1))
776 (goto-char (next-single-property-change (point) :vc-annotate-prefix)))))
778 (defun vc-rcs-annotate-extract-revision-at-line ()
779 (aref (get-text-property (point) :vc-rcs-r/d/a) 0))
786 (autoload 'vc-tag-precondition "vc")
787 (declare-function vc-file-tree-walk "vc" (dirname func &rest args))
789 (defun vc-rcs-create-tag (dir name branchp)
791 (error "RCS backend does not support module branches"))
792 (let ((result (vc-tag-precondition dir)))
794 (error "File %s is not up-to-date" result)
798 (vc-do-command "*vc*" 0 "rcs" (vc-master-name f) (concat "-n" name ":")))))))
805 (defun vc-rcs-trunk-p (rev)
806 "Return t if REV is a revision on the trunk."
807 (not (eq nil (string-match "\\`[0-9]+\\.[0-9]+\\'" rev))))
809 (defun vc-rcs-minor-part (rev)
810 "Return the minor revision number of a revision number REV."
811 (string-match "[0-9]+\\'" rev)
812 (substring rev (match-beginning 0) (match-end 0)))
814 (defun vc-rcs-previous-revision (_file rev)
815 "Return the revision number immediately preceding REV for FILE,
816 or nil if there is no previous revision. This default
817 implementation works for MAJOR.MINOR-style revision numbers as
818 used by RCS and CVS."
819 (let ((branch (vc-branch-part rev))
820 (minor-num (string-to-number (vc-rcs-minor-part rev))))
823 ;; revision does probably not start a branch or release
824 (concat branch "." (number-to-string (1- minor-num)))
825 (if (vc-rcs-trunk-p rev)
826 ;; we are at the beginning of the trunk --
827 ;; don't know anything to return here
829 ;; we are at the beginning of a branch --
830 ;; return revision of starting point
831 (vc-branch-part branch))))))
833 (defun vc-rcs-next-revision (file rev)
834 "Return the revision number immediately following REV for FILE,
835 or nil if there is no next revision. This default implementation
836 works for MAJOR.MINOR-style revision numbers as used by RCS
838 (when (not (string= rev (vc-working-revision file)))
839 (let ((branch (vc-branch-part rev))
840 (minor-num (string-to-number (vc-rcs-minor-part rev))))
841 (concat branch "." (number-to-string (1+ minor-num))))))
843 ;; You might think that this should be distributed with RCS, but
844 ;; apparently not. CVS sometimes provides a version of it.
845 ;; http://lists.gnu.org/archive/html/emacs-devel/2014-05/msg00288.html
846 (defvar vc-rcs-rcs2log-program
848 (cond ((file-executable-p
849 (setq exe (expand-file-name "rcs2log" exec-directory)))
851 ;; In the unlikely event that someone is running an
852 ;; uninstalled Emacs and wants to do something RCS-related.
854 (setq exe (expand-file-name "lib-src/rcs2log" source-directory)))
857 "Path to the `rcs2log' program (normally in `exec-directory').")
859 (autoload 'vc-buffer-sync "vc-dispatcher")
861 (defun vc-rcs-update-changelog (files)
862 "Default implementation of update-changelog.
863 Uses `rcs2log' which only works for RCS and CVS."
864 ;; FIXME: We (c|sh)ould add support for cvs2cl
865 (let ((odefault default-directory)
866 (changelog (find-change-log))
867 ;; Presumably not portable to non-Unixy systems, along with rcs2log:
868 (tempfile (make-temp-file
869 (expand-file-name "vc"
870 (or small-temporary-file-directory
871 temporary-file-directory))))
872 (login-name (or user-login-name
873 (format "uid%d" (number-to-string (user-uid)))))
874 (full-name (or add-log-full-name
877 (format "uid%d" (number-to-string (user-uid)))))
878 (mailing-address (or add-log-mailing-address
880 (find-file-other-window changelog)
881 (barf-if-buffer-read-only)
884 (goto-char (point-min))
886 (message "Computing change log entries...")
887 (message "Computing change log entries... %s"
890 (setq default-directory odefault)
891 (if (eq 0 (apply #'call-process vc-rcs-rcs2log-program
892 nil (list t tempfile) nil
894 "-u" (concat login-name
896 "\t" mailing-address)
900 (expand-file-name f odefault)))
903 (pop-to-buffer (get-buffer-create "*vc*"))
905 (insert-file-contents tempfile)
907 (setq default-directory (file-name-directory changelog))
908 (delete-file tempfile)))))
910 (defun vc-rcs-check-headers ()
911 "Check if the current file has any headers in it."
913 (goto-char (point-min))
914 (re-search-forward "\\$[A-Za-z\300-\326\330-\366\370-\377]+\
915 \\(: [\t -#%-\176\240-\377]*\\)?\\$" nil t)))
917 (defun vc-rcs-clear-headers ()
918 "Clear RCS header value parts."
919 (let ((case-fold-search nil))
920 (goto-char (point-min))
921 (while (re-search-forward
922 (concat "\\$\\(Author\\|Date\\|Header\\|Id\\|Locker\\|Name\\|"
923 "RCSfile\\|Revision\\|Source\\|State\\): [^$\n]+\\$")
925 (replace-match "$\\1$"))))
927 (autoload 'vc-rename-master "vc-filewise")
929 (defun vc-rcs-rename-file (old new)
930 ;; Just move the master file (using vc-rcs-master-templates).
931 (vc-rename-master (vc-master-name old) new vc-rcs-master-templates))
933 (defun vc-rcs-find-file-hook ()
934 ;; If the file is locked by some other user, make
935 ;; the buffer read-only. Like this, even root
936 ;; cannot modify a file that someone else has locked.
937 (and (stringp (vc-state buffer-file-name 'RCS))
938 (setq buffer-read-only t)))
942 ;;; Internal functions
945 (defun vc-rcs-workfile-is-newer (file)
946 "Return non-nil if FILE is newer than its RCS master.
947 This likely means that FILE has been changed with respect
948 to its master version."
949 (let ((file-time (nth 5 (file-attributes file)))
950 (master-time (nth 5 (file-attributes (vc-master-name file)))))
951 (or (> (nth 0 file-time) (nth 0 master-time))
952 (and (= (nth 0 file-time) (nth 0 master-time))
953 (> (nth 1 file-time) (nth 1 master-time))))))
955 (defun vc-rcs-find-most-recent-rev (branch)
956 "Find most recent revision on BRANCH."
957 (goto-char (point-min))
958 (let ((latest-rev -1) value)
959 (while (re-search-forward (concat "^\\(" (regexp-quote branch)
960 "\\.\\([0-9]+\\)\\)\ndate[ \t]+[0-9.]+;")
962 (let ((rev (string-to-number (match-string 2))))
963 (when (< latest-rev rev)
964 (setq latest-rev rev)
965 (setq value (match-string 1)))))
967 (vc-branch-part branch))))
969 (defun vc-rcs-fetch-master-state (file &optional working-revision)
970 "Compute the master file's idea of the state of FILE.
971 If a WORKING-REVISION is given, compute the state of that version,
972 otherwise determine the workfile version based on the master file.
973 This function sets the properties `vc-working-revision' and
974 `vc-checkout-model' to their correct values, based on the master
976 (when (and (file-regular-p file) (vc-master-name file))
978 (if (or (not (vc-insert-file (vc-master-name file) "^[0-9]"))
979 (progn (goto-char (point-min))
980 (not (looking-at "^head[ \t\n]+[^;]+;$"))))
981 (error "File %s is not an RCS master file" (vc-master-name file)))
982 (let ((workfile-is-latest nil)
983 (default-branch (vc-parse-buffer "^branch[ \t\n]+\\([^;]*\\);" 1)))
984 (vc-file-setprop file 'vc-rcs-default-branch default-branch)
985 (unless working-revision
986 ;; Workfile version not known yet. Determine that first. It
987 ;; is either the head of the trunk, the head of the default
988 ;; branch, or the "default branch" itself, if that is a full
992 ((or (not default-branch) (string= "" default-branch))
993 (setq working-revision
994 (vc-parse-buffer "^head[ \t\n]+\\([^;]+\\);" 1))
995 (setq workfile-is-latest t))
996 ;; default branch is actually a revision
997 ((string-match "^[0-9]+\\.[0-9]+\\(\\.[0-9]+\\.[0-9]+\\)*$"
999 (setq working-revision default-branch))
1000 ;; else, search for the head of the default branch
1001 (t (vc-insert-file (vc-master-name file) "^desc")
1002 (setq working-revision
1003 (vc-rcs-find-most-recent-rev default-branch))
1004 (setq workfile-is-latest t)))
1005 (vc-file-setprop file 'vc-working-revision working-revision))
1006 ;; Check strict locking
1007 (goto-char (point-min))
1008 (vc-file-setprop file 'vc-checkout-model
1009 (if (re-search-forward ";[ \t\n]*strict;" nil t)
1010 'locking 'implicit))
1011 ;; Compute state of workfile version
1012 (goto-char (point-min))
1014 (vc-parse-buffer (concat "^locks[ \t\n]+[^;]*[ \t\n]+\\([^:]+\\):"
1015 (regexp-quote working-revision)
1021 (if (or workfile-is-latest
1022 (vc-rcs-latest-on-branch-p file working-revision))
1023 ;; workfile version is latest on branch
1025 ;; workfile version is not latest on branch
1027 ;; locked by the calling user
1028 ((and (stringp locking-user)
1029 (string= locking-user (vc-user-login-name file)))
1030 ;; Don't call `vc-rcs-checkout-model' to avoid inf-looping.
1031 (if (or (eq (vc-file-getprop file 'vc-checkout-model) 'locking)
1033 (vc-rcs-latest-on-branch-p file working-revision))
1035 ;; Locking is not used for the file, but the owner does
1036 ;; have a lock, and there is a higher version on the current
1037 ;; branch. Not sure if this can occur, and if it is right
1038 ;; to use `needs-merge' in this case.
1040 ;; locked by somebody else
1041 ((stringp locking-user)
1044 (error "Error getting state of RCS file"))))))))
1046 (defun vc-rcs-consult-headers (file)
1047 "Search for RCS headers in FILE, and set properties accordingly.
1049 Returns: nil if no headers were found
1050 'rev if a workfile revision was found
1051 'rev-and-lock if revision and lock info was found"
1053 ((not (get-file-buffer file)) nil)
1054 ((let (status version)
1055 (with-current-buffer (get-file-buffer file)
1057 (goto-char (point-min))
1059 ;; search for $Id or $Header
1060 ;; -------------------------
1061 ;; The `\ 's below avoid an RCS 5.7 bug when checking in this file.
1062 ((or (and (search-forward "$Id\ : " nil t)
1063 (looking-at "[^ ]+ \\([0-9.]+\\) "))
1064 (and (progn (goto-char (point-min))
1065 (search-forward "$Header\ : " nil t))
1066 (looking-at "[^ ]+ \\([0-9.]+\\) ")))
1067 (goto-char (match-end 0))
1068 ;; if found, store the revision number ...
1069 (setq version (match-string-no-properties 1))
1070 ;; ... and check for the locking state
1073 (concat "[0-9]+[/-][01][0-9][/-][0-3][0-9] " ; date
1074 "[0-2][0-9]:[0-5][0-9]+:[0-6][0-9]+\\([+-][0-9:]+\\)? " ; time
1075 "[^ ]+ [^ ]+ ")) ; author & state
1076 (goto-char (match-end 0)) ; [0-6] in regexp handles leap seconds
1078 ;; unlocked revision
1080 ;;(setq locking-user 'none)
1081 (setq status 'rev-and-lock))
1082 ;; revision is locked by some user
1083 ((looking-at "\\([^ ]+\\) \\$")
1084 ;;(setq locking-user (match-string-no-properties 1))
1085 (setq status 'rev-and-lock))
1086 ;; everything else: false
1088 ;; unexpected information in
1089 ;; keyword string --> quit
1091 ;; search for $Revision
1092 ;; --------------------
1093 ((re-search-forward (concat "\\$"
1094 "Revision: \\([0-9.]+\\) \\$")
1096 ;; if found, store the revision number ...
1097 (setq version (match-string-no-properties 1))
1098 ;; and see if there's any lock information
1099 (goto-char (point-min))
1100 (if (re-search-forward (concat "\\$" "Locker:") nil t)
1101 (cond ((looking-at " \\([^ ]+\\) \\$")
1102 ;;(setq locking-user (match-string-no-properties 1))
1103 (setq status 'rev-and-lock))
1104 ((looking-at " *\\$")
1105 ;;(setq locking-user 'none)
1106 (setq status 'rev-and-lock))
1108 ;;(setq locking-user 'none)
1109 (setq status 'rev-and-lock)))
1110 (setq status 'rev)))
1111 ;; else: nothing found
1112 ;; -------------------
1114 (if status (vc-file-setprop file 'vc-working-revision version))
1117 (defun vc-release-greater-or-equal (r1 r2)
1118 "Compare release numbers, represented as strings.
1119 Release components are assumed cardinal numbers, not decimal fractions
1120 \(5.10 is a higher release than 5.9). Omitted fields are considered
1121 lower \(5.6.7 is earlier than 5.6.7.1). Comparison runs till the end
1122 of the string is found, or a non-numeric component shows up \(5.6.7 is
1123 earlier than \"5.6.7 beta\", which is probably not what you want in
1124 some cases). This code is suitable for existing RCS release numbers.
1125 CVS releases are handled reasonably, too \(1.3 < 1.4* < 1.5)."
1128 (or (and (string-match "^\\.?\\([0-9]+\\)" r1)
1129 (setq i1 (match-end 0))
1130 (setq v1 (string-to-number (match-string 1 r1)))
1131 (or (and (string-match "^\\.?\\([0-9]+\\)" r2)
1132 (setq i2 (match-end 0))
1133 (setq v2 (string-to-number (match-string 1 r2)))
1134 (if (> v1 v2) (throw 'done t)
1135 (if (< v1 v2) (throw 'done nil)
1137 (vc-release-greater-or-equal
1139 (substring r2 i2)))))))
1141 (or (and (string-match "^\\.?\\([0-9]+\\)" r2)
1145 (defun vc-rcs-release-p (release)
1146 "Return t if we have RELEASE or better."
1147 (let ((installation (vc-rcs-system-release)))
1148 (if (and installation
1149 (not (eq installation 'unknown)))
1150 (vc-release-greater-or-equal installation release))))
1152 (defun vc-rcs-system-release ()
1153 "Return the RCS release installed on this system, as a string.
1154 Return symbol `unknown' if the release cannot be deducted. The user can
1155 override this using variable `vc-rcs-release'.
1157 If the user has not set variable `vc-rcs-release' and it is nil,
1158 variable `vc-rcs-release' is set to the returned value."
1160 (setq vc-rcs-release
1161 (or (and (zerop (vc-do-command "*vc*" nil "rcs" nil "-V"))
1162 (with-current-buffer (get-buffer "*vc*")
1163 (vc-parse-buffer "^RCS version \\([0-9.]+ *.*\\)" 1)))
1166 (defun vc-rcs-set-non-strict-locking (file)
1167 (vc-do-command "*vc*" 0 "rcs" file "-U")
1168 (vc-file-setprop file 'vc-checkout-model 'implicit)
1169 (set-file-modes file (logior (file-modes file) 128)))
1171 (defun vc-rcs-set-default-branch (file branch)
1172 (vc-do-command "*vc*" 0 "rcs" (vc-master-name file) (concat "-b" branch))
1173 (vc-file-setprop file 'vc-rcs-default-branch branch))
1175 (defun vc-rcs-parse (&optional buffer)
1176 "Parse current buffer, presumed to be in RCS-style masterfile format.
1177 Optional arg BUFFER specifies another buffer to parse. Return an alist
1178 of two elements, w/ keys `headers' and `revisions' and values in turn
1179 sub-alists. For `headers', the values unless otherwise specified are
1180 strings and the keys are:
1183 head -- latest revision
1184 branch -- the branch the \"head revision\" lies on;
1185 absent if the head revision lies on the trunk
1187 symbols -- sub-alist of (SYMBOL . REVISION) elements
1188 locks -- if file is checked out, something like \"ttn:1.7\"
1189 strict -- t if \"strict locking\" is in effect, otherwise nil
1190 comment -- may be absent; typically something like \"# \" or \"; \"
1191 expand -- may be absent; ???
1193 For `revisions', the car is REVISION (string), the cdr a sub-alist,
1194 with string values (unless otherwise specified) and keys:
1196 date -- a time value (like that returned by `encode-time'); as a
1197 special case, a year value less than 100 is augmented by 1900
1199 state -- typically \"Exp\" or \"Rel\"
1200 branches -- list of revisions that begin branches from this revision
1201 next -- on the trunk: the chronologically-preceding revision, or \"\";
1202 on a branch: the chronologically-following revision, or \"\"
1203 log -- change log entry
1204 text -- for the head revision on the trunk, the body of the file;
1205 other revisions have `:insn' instead
1206 :insn -- for non-head revisions, a list of parsed instructions
1207 in one of two forms, in both cases START meaning \"first
1209 - `(START k COUNT)' -- kill COUNT lines
1210 - `(START i TEXT)' -- insert TEXT (a string)
1211 The list is in descending order by START.
1213 The `:insn' key is a keyword to distinguish it as a vc-rcs.el extension."
1214 (setq buffer (get-buffer (or buffer (current-buffer))))
1216 ;; An RCS masterfile can be viewed as containing four regular (for the
1217 ;; most part) sections: (a) the "headers", (b) the "rev headers", (c)
1218 ;; the "description" and (d) the "rev bodies", in that order. In the
1219 ;; returned alist (see docstring), elements from (b) and (d) are
1220 ;; combined pairwise to form the "revisions", while those from (a) and
1221 ;; (c) are simply combined to form the "headers".
1223 ;; Loosely speaking, each section contains a series of alternating
1224 ;; "tags" and "printed representations". In the (b) and (d), many
1225 ;; such series can appear, and a revision number on a line by itself
1226 ;; precedes the series of tags and printed representations associated
1229 ;; In (a) and (b), the printed representations (with the exception of
1230 ;; the `comment' tag in the headers) terminate with a semicolon, which
1231 ;; is NOT part of the "value" finally associated with the tag. All
1232 ;; other printed representations are in "@@-format"; there is an "@",
1233 ;; the middle part (to be translated into the value), another "@" and
1234 ;; a newline. Each "@@" in the middle part indicates the position of
1235 ;; a single "@" (and consequently the requirement of an additional
1236 ;; initial step when translating to the value).
1238 ;; Parser state includes vars that collect parts of the return value...
1239 (let ((desc nil) (headers nil) (revs nil)
1240 ;; ... as well as vars that support a single-pass, tag-assisted,
1241 ;; minimal-data-copying scan. Basically -- skirting around the
1242 ;; grouping by revision required in (b) and (d) -- we repeatedly
1243 ;; and context-sensitively read a tag (that MUST be present),
1244 ;; determine the bounds of the printed representation, translate
1245 ;; it into a value, and push the tag plus value onto one of the
1246 ;; collection vars. Finally, we return the parse tree
1247 ;; incorporating the values of the collection vars (see "rv").
1249 ;; A symbol or string to keep track of context (for error messages).
1251 ;; A symbol, the current tag.
1253 ;; Region (begin and end buffer positions) of the printed
1254 ;; representation for the current tag.
1256 ;; A list of buffer positions where "@@" can be found within the
1257 ;; printed representation region. For each location, we push two
1258 ;; elements onto the list, 1+ and 2+ the location, respectively,
1259 ;; with the 2+ appearing at the head. In this way, the expression
1260 ;; `(,e ,@@-holes ,b)
1261 ;; describes regions that can be concatenated (in reverse order)
1262 ;; to "de-@@-format" the printed representation as the first step
1263 ;; to translating it into some value. See internal func `gather'.
1266 ((sw () (skip-chars-forward " \t\n")) ; i.e., `[:space:]'
1267 (at (tag) (save-excursion (eq tag (read buffer))))
1268 (to-eol () (buffer-substring-no-properties
1269 (point) (progn (forward-line 1)
1271 (to-semi () (setq b (point)
1272 e (progn (search-forward ";")
1274 (to-one@ () (setq @-holes nil
1275 b (progn (search-forward "@") (point))
1276 e (progn (while (and (search-forward "@")
1277 (= ?@ (char-after)))
1278 (push (point) @-holes)
1280 (push (point) @-holes))
1282 (tok+val (set-b+e name &optional proc)
1283 (unless (eq name (setq tok (read buffer)))
1284 (error "Missing `%s' while parsing %s" name context))
1289 (buffer-substring-no-properties b e))))
1290 (k-semi (name &optional proc) (tok+val #'to-semi name proc))
1291 (gather (b e @-holes)
1292 (let ((pairs `(,e ,@@-holes ,b))
1295 (push (buffer-substring-no-properties
1296 (cadr pairs) (car pairs))
1298 (setq pairs (cddr pairs)))
1299 (apply #'concat acc)))
1300 (gather1 () (gather b e @-holes))
1301 (k-one@ (name &optional later)
1302 (tok+val #'to-one@ name (if later (lambda () t) #'gather1))))
1304 (goto-char (point-min))
1306 (setq context 'headers)
1307 (cl-flet ((hpush (name &optional proc)
1308 (push (k-semi name proc) headers)))
1315 (mapcar (lambda (together)
1316 (let ((two (split-string together ":")))
1317 (setcar two (intern (car two)))
1318 (setcdr two (cadr two))
1321 (buffer-substring-no-properties b e)))))
1323 (push `(strict . ,(when (at 'strict)
1324 (search-forward ";")
1328 (push (k-one@ 'comment) headers)
1329 (search-forward ";"))
1331 (push (k-one@ 'expand) headers)
1332 (search-forward ";"))
1333 (setq headers (nreverse headers))
1335 (sw) (setq context 'rev-headers)
1336 (while (looking-at "[0-9]")
1340 (let ((ls (mapcar 'string-to-number
1342 (buffer-substring-no-properties
1345 ;; Hack the year -- verified to be the
1346 ;; same algorithm used in RCS 5.7.
1347 (when (< (car ls) 100)
1348 (setcar ls (+ 1900 (car ls))))
1349 (apply #'encode-time (nreverse ls)))))
1350 ,@(mapcar #'k-semi '(author state))
1354 (buffer-substring-no-properties b e))))
1358 (setq revs (nreverse revs))
1360 (sw) (setq context 'desc
1361 desc (k-one@ 'desc))
1364 ;; Element of `revs' that initially holds only header info.
1365 ;; "Pairwise combination" occurs when we add body info.
1367 ;; Components of the editing commands (aside from the actual
1368 ;; text) that comprise the `text' printed representations
1369 ;; (not including the "head" revision).
1371 ;; Ascending (reversed) `@-holes' which the internal func
1372 ;; `incg' pops to effect incremental gathering.
1374 ;; Function to extract text (for the `a' command), either
1375 ;; `incg' or `buffer-substring-no-properties'. (This is
1376 ;; for speed; strictly speaking, it is sufficient to use
1377 ;; only the former since it behaves identically to the
1378 ;; latter in the absence of "@@".)
1380 (cl-flet ((incg (beg end)
1381 (let ((b beg) (e end) @-holes)
1382 (while (and asc (< (car asc) e))
1383 (push (pop asc) @-holes)
1384 (push (pop asc) @-holes))
1385 ;; Self-deprecate when work is done.
1386 ;; Folding many dimensions into one.
1387 ;; Thanks B.Mandelbrot, for complex sum.
1388 ;; O beauteous math! --the Unvexed Bum
1390 (setq sub #'buffer-substring-no-properties))
1391 (gather b e @-holes))))
1394 (setq context (to-eol)
1395 rev (or (assoc context revs)
1396 (error "Rev `%s' has body but no head"
1398 (push (k-one@ 'log) (cdr rev))
1399 ;; For rev body `text' tags, delay translation slightly...
1400 (push (k-one@ 'text t) (cdr rev))
1401 ;; ... until we decide which tag and value is appropriate to
1402 ;; collect. For the "head" revision, compute the value of the
1403 ;; `text' printed representation by simple `gather'. For all
1404 ;; other revisions, replace the `text' tag+value with `:insn'
1405 ;; plus value, always scanning in-place.
1406 (if (string= context (cdr (assq 'head headers)))
1407 (setcdr (cadr rev) (gather b e @-holes))
1409 (setq asc (nreverse @-holes)
1411 (setq sub #'buffer-substring-no-properties))
1414 (while (< (point) e)
1416 (setq cmd (char-before)
1417 start (read (current-buffer))
1418 act (read (current-buffer)))
1422 ;; `d' means "delete lines".
1423 ;; For Emacs spirit, we use `k' for "kill".
1426 ;; `a' means "append after this line" but
1427 ;; internally we normalize it so that START
1428 ;; specifies the actual line for insert, thus
1429 ;; requiring less hair in the realization algs.
1430 ;; For Emacs spirit, we use `i' for "insert".
1432 ,(funcall sub (point) (progn (forward-line act)
1434 (_ (error "Bad command `%c' in `text' for rev `%s'"
1438 (setcar (cdr rev) (cons :insn acc)))))))
1440 `((headers ,desc ,@headers)
1441 (revisions ,@revs)))))
1445 ;;; vc-rcs.el ends here