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emacs/lisp/vc-cvs.el
Juanma Barranquero e6608c1233 Fix typo.
2002-07-03 14:26:51 +00:00

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;;; vc-cvs.el --- non-resident support for CVS version-control
;; Copyright (C) 1995,98,99,2000,2001 Free Software Foundation, Inc.
;; Author: FSF (see vc.el for full credits)
;; Maintainer: Andre Spiegel <spiegel@gnu.org>
;; $Id: vc-cvs.el,v 1.41 2002/05/12 17:29:29 eliz Exp $
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;;; Code:
(eval-when-compile
(require 'vc))
;;;
;;; Customization options
;;;
(defcustom vc-cvs-global-switches nil
"*Global switches to pass to any CVS command."
:type '(choice (const :tag "None" nil)
(string :tag "Argument String")
(repeat :tag "Argument List"
:value ("")
string))
:version "21.4"
:group 'vc)
(defcustom vc-cvs-register-switches nil
"*Extra switches for registering a file into CVS.
A string or list of strings passed to the checkin program by
\\[vc-register]."
:type '(choice (const :tag "None" nil)
(string :tag "Argument String")
(repeat :tag "Argument List"
:value ("")
string))
:version "21.1"
:group 'vc)
(defcustom vc-cvs-diff-switches nil
"*A string or list of strings specifying extra switches for cvs diff under VC."
:type '(choice (const :tag "None" nil)
(string :tag "Argument String")
(repeat :tag "Argument List"
:value ("")
string))
:version "21.1"
:group 'vc)
(defcustom vc-cvs-header (or (cdr (assoc 'CVS vc-header-alist)) '("\$Id\$"))
"*Header keywords to be inserted by `vc-insert-headers'."
:version "21.1"
:type '(repeat string)
:group 'vc)
(defcustom vc-cvs-use-edit t
"*Non-nil means to use `cvs edit' to \"check out\" a file.
This is only meaningful if you don't use the implicit checkout model
\(i.e. if you have $CVSREAD set)."
:type 'boolean
:version "21.1"
:group 'vc)
(defcustom vc-cvs-stay-local t
"*Non-nil means use local operations when possible for remote repositories.
This avoids slow queries over the network and instead uses heuristics
and past information to determine the current status of a file.
The value can also be a regular expression to match against the host name
of a repository; then VC only stays local for hosts that match it."
:type '(choice (const :tag "Always stay local" t)
(string :tag "Host regexp")
(const :tag "Don't stay local" nil))
:version "21.1"
:group 'vc)
(defcustom vc-cvs-sticky-date-format-string "%c"
"*Format string for mode-line display of sticky date.
Format is according to `format-time-string'. Only used if
`vc-cvs-sticky-tag-display' is t."
:type '(string)
:version "21.4"
:group 'vc)
(defcustom vc-cvs-sticky-tag-display t
"*Specify the mode-line display of sticky tags.
Value t means default display, nil means no display at all. If the
value is a function or macro, it is called with the sticky tag and
its' type as parameters, in that order. TYPE can have three different
values: `symbolic-name' (TAG is a string), `revision-number' (TAG is a
string) and `date' (TAG is a date as returned by `encode-time'). The
return value of the function or macro will be displayed as a string.
Here's an example that will display the formatted date for sticky
dates and the word \"Sticky\" for sticky tag names and revisions.
(lambda (tag type)
(cond ((eq type 'date) (format-time-string
vc-cvs-sticky-date-format-string tag))
((eq type 'revision-number) \"Sticky\")
((eq type 'symbolic-name) \"Sticky\")))
Here's an example that will abbreviate to the first character only,
any text before the first occurence of `-' for sticky symbolic tags.
If the sticky tag is a revision number, the word \"Sticky\" is
displayed. Date and time is displayed for sticky dates.
(lambda (tag type)
(cond ((eq type 'date) (format-time-string \"%Y%m%d %H:%M\" tag))
((eq type 'revision-number) \"Sticky\")
((eq type 'symbolic-name)
(condition-case nil
(progn
(string-match \"\\\\([^-]*\\\\)\\\\(.*\\\\)\" tag)
(concat (substring (match-string 1 tag) 0 1) \":\"
(substring (match-string 2 tag) 1 nil)))
(error tag))))) ; Fall-back to given tag name.
See also variable `vc-cvs-sticky-date-format-string'."
:type '(choice boolean function)
:version "21.4"
:group 'vc)
;;;
;;; Internal variables
;;;
(defvar vc-cvs-local-month-numbers
'(("Jan" . 1) ("Feb" . 2) ("Mar" . 3) ("Apr" . 4)
("May" . 5) ("Jun" . 6) ("Jul" . 7) ("Aug" . 8)
("Sep" . 9) ("Oct" . 10) ("Nov" . 11) ("Dec" . 12))
"Local association list of month numbers.")
;;;
;;; State-querying functions
;;;
;;;###autoload (defun vc-cvs-registered (f)
;;;###autoload (when (file-readable-p (expand-file-name
;;;###autoload "CVS/Entries" (file-name-directory f)))
;;;###autoload (require 'vc-cvs)
;;;###autoload (vc-cvs-registered f)))
(defun vc-cvs-registered (file)
"Check if FILE is CVS registered."
(let ((dirname (or (file-name-directory file) ""))
(basename (file-name-nondirectory file))
;; make sure that the file name is searched case-sensitively
(case-fold-search nil))
(if (file-readable-p (expand-file-name "CVS/Entries" dirname))
(with-temp-buffer
(vc-insert-file (expand-file-name "CVS/Entries" dirname))
(goto-char (point-min))
(cond
((re-search-forward
;; CVS-removed files are not taken under VC control.
(concat "^/" (regexp-quote basename) "/[^/-]") nil t)
(beginning-of-line)
(vc-cvs-parse-entry file)
t)
(t nil)))
nil)))
(defun vc-cvs-state (file)
"CVS-specific version of `vc-state'."
(if (vc-cvs-stay-local-p file)
(let ((state (vc-file-getprop file 'vc-state)))
;; If we should stay local, use the heuristic but only if
;; we don't have a more precise state already available.
(if (memq state '(up-to-date edited))
(vc-cvs-state-heuristic file)
state))
(with-temp-buffer
(cd (file-name-directory file))
(vc-cvs-command t 0 file "status")
(vc-cvs-parse-status t))))
(defun vc-cvs-state-heuristic (file)
"CVS-specific state heuristic."
;; If the file has not changed since checkout, consider it `up-to-date'.
;; Otherwise consider it `edited'.
(let ((checkout-time (vc-file-getprop file 'vc-checkout-time))
(lastmod (nth 5 (file-attributes file))))
(if (equal checkout-time lastmod)
'up-to-date
'edited)))
(defun vc-cvs-dir-state (dir)
"Find the CVS state of all files in DIR."
(if (vc-cvs-stay-local-p dir)
(vc-cvs-dir-state-heuristic dir)
(let ((default-directory dir))
;; Don't specify DIR in this command, the default-directory is
;; enough. Otherwise it might fail with remote repositories.
(with-temp-buffer
(vc-cvs-command t 0 nil "status" "-l")
(goto-char (point-min))
(while (re-search-forward "^=+\n\\([^=\n].*\n\\|\n\\)+" nil t)
(narrow-to-region (match-beginning 0) (match-end 0))
(vc-cvs-parse-status)
(goto-char (point-max))
(widen))))))
(defun vc-cvs-workfile-version (file)
"CVS-specific version of `vc-workfile-version'."
;; There is no need to consult RCS headers under CVS, because we
;; get the workfile version for free when we recognize that a file
;; is registered in CVS.
(vc-cvs-registered file)
(vc-file-getprop file 'vc-workfile-version))
(defun vc-cvs-checkout-model (file)
"CVS-specific version of `vc-checkout-model'."
(if (or (getenv "CVSREAD")
;; If the file is not writable (despite CVSREAD being
;; undefined), this is probably because the file is being
;; "watched" by other developers.
;; (If vc-mistrust-permissions was t, we actually shouldn't
;; trust this, but there is no other way to learn this from CVS
;; at the moment (version 1.9).)
(string-match "r-..-..-." (nth 8 (file-attributes file))))
'announce
'implicit))
(defun vc-cvs-mode-line-string (file)
"Return string for placement into the modeline for FILE.
Compared to the default implementation, this function does two things:
Handle the special case of a CVS file that is added but not yet
committed and support display of sticky tags."
(let* ((state (vc-state file))
(rev (vc-workfile-version file))
(sticky-tag (vc-file-getprop file 'vc-cvs-sticky-tag))
(sticky-tag-printable (and sticky-tag
(not (string= sticky-tag ""))
(concat "[" sticky-tag "]"))))
(cond ((string= rev "0")
;; A file that is added but not yet committed.
"CVS @@")
((or (eq state 'up-to-date)
(eq state 'needs-patch))
(concat "CVS-" rev sticky-tag-printable))
((stringp state)
(concat "CVS:" state ":" rev sticky-tag-printable))
(t
;; Not just for the 'edited state, but also a fallback
;; for all other states. Think about different symbols
;; for 'needs-patch and 'needs-merge.
(concat "CVS:" rev sticky-tag-printable)))))
(defun vc-cvs-dired-state-info (file)
"CVS-specific version of `vc-dired-state-info'."
(let* ((cvs-state (vc-state file))
(state (cond ((eq cvs-state 'edited) "modified")
((eq cvs-state 'needs-patch) "patch")
((eq cvs-state 'needs-merge) "merge")
;; FIXME: those two states cannot occur right now
((eq cvs-state 'unlocked-changes) "conflict")
((eq cvs-state 'locally-added) "added")
)))
(if state (concat "(" state ")"))))
;;;
;;; State-changing functions
;;;
(defun vc-cvs-register (file &optional rev comment)
"Register FILE into the CVS version-control system.
COMMENT can be used to provide an initial description of FILE.
`vc-register-switches' and `vc-cvs-register-switches' are passed to
the CVS command (in that order)."
(let ((switches (append
(if (stringp vc-register-switches)
(list vc-register-switches)
vc-register-switches)
(if (stringp vc-cvs-register-switches)
(list vc-cvs-register-switches)
vc-cvs-register-switches))))
(apply 'vc-cvs-command nil 0 file
"add"
(and comment (string-match "[^\t\n ]" comment)
(concat "-m" comment))
switches)))
(defun vc-cvs-responsible-p (file)
"Return non-nil if CVS thinks it is responsible for FILE."
(file-directory-p (expand-file-name "CVS"
(if (file-directory-p file)
file
(file-name-directory file)))))
(defun vc-cvs-could-register (file)
"Return non-nil if FILE could be registered in CVS.
This is only possible if CVS is responsible for FILE's directory."
(vc-cvs-responsible-p file))
(defun vc-cvs-checkin (file rev comment)
"CVS-specific version of `vc-backend-checkin'."
(let ((switches (if (stringp vc-checkin-switches)
(list vc-checkin-switches)
vc-checkin-switches))
status)
(if (or (not rev) (vc-cvs-valid-version-number-p rev))
(setq status (apply 'vc-cvs-command nil 1 file
"ci" (if rev (concat "-r" rev))
(concat "-m" comment)
switches))
(if (not (vc-cvs-valid-symbolic-tag-name-p rev))
(error "%s is not a valid symbolic tag name" rev)
;; If the input revison is a valid symbolic tag name, we create it
;; as a branch, commit and switch to it.
(apply 'vc-cvs-command nil 0 file "tag" "-b" (list rev))
(apply 'vc-cvs-command nil 0 file "update" "-r" (list rev))
(setq status (apply 'vc-cvs-command nil 1 file
"ci"
(concat "-m" comment)
switches))
(vc-file-setprop file 'vc-cvs-sticky-tag rev)))
(set-buffer "*vc*")
(goto-char (point-min))
(when (not (zerop status))
;; Check checkin problem.
(cond
((re-search-forward "Up-to-date check failed" nil t)
(vc-file-setprop file 'vc-state 'needs-merge)
(error (substitute-command-keys
(concat "Up-to-date check failed: "
"type \\[vc-next-action] to merge in changes"))))
(t
(pop-to-buffer (current-buffer))
(goto-char (point-min))
(shrink-window-if-larger-than-buffer)
(error "Check-in failed"))))
;; Update file properties
(vc-file-setprop
file 'vc-workfile-version
(vc-parse-buffer "^\\(new\\|initial\\) revision: \\([0-9.]+\\)" 2))
;; Forget the checkout model of the file, because we might have
;; guessed wrong when we found the file. After commit, we can
;; tell it from the permissions of the file (see
;; vc-cvs-checkout-model).
(vc-file-setprop file 'vc-checkout-model nil)
;; if this was an explicit check-in (does not include creation of
;; a branch), remove the sticky tag.
(if (and rev (not (vc-cvs-valid-symbolic-tag-name-p rev)))
(vc-cvs-command nil 0 file "update" "-A"))))
(defun vc-cvs-checkout (file &optional editable rev workfile)
"Retrieve a revision of FILE into a WORKFILE.
EDITABLE non-nil means that the file should be writable.
REV is the revision to check out into WORKFILE."
(let ((filename (or workfile file))
(file-buffer (get-file-buffer file))
switches)
(message "Checking out %s..." filename)
(save-excursion
;; Change buffers to get local value of vc-checkout-switches.
(if file-buffer (set-buffer file-buffer))
(setq switches (if (stringp vc-checkout-switches)
(list vc-checkout-switches)
vc-checkout-switches))
;; Save this buffer's default-directory
;; and use save-excursion to make sure it is restored
;; in the same buffer it was saved in.
(let ((default-directory default-directory))
(save-excursion
;; Adjust the default-directory so that the check-out creates
;; the file in the right place.
(setq default-directory (file-name-directory filename))
(if workfile
(let ((failed t)
(backup-name (if (string= file workfile)
(car (find-backup-file-name filename)))))
(when backup-name
(copy-file filename backup-name
'ok-if-already-exists 'keep-date)
(unless (file-writable-p filename)
(set-file-modes filename
(logior (file-modes filename) 128))))
(unwind-protect
(progn
(let ((coding-system-for-read 'no-conversion)
(coding-system-for-write 'no-conversion))
(with-temp-file filename
(apply 'vc-cvs-command
(current-buffer) 0 file
"-Q" ; suppress diagnostic output
"update"
(and rev (not (string= rev ""))
(concat "-r" rev))
"-p"
switches)))
(setq failed nil))
(if failed
(if backup-name
(rename-file backup-name filename
'ok-if-already-exists)
(if (file-exists-p filename)
(delete-file filename)))
(and backup-name
(not vc-make-backup-files)
(delete-file backup-name)))))
(if (and (file-exists-p file) (not rev))
;; If no revision was specified, just make the file writable
;; if necessary (using `cvs-edit' if requested).
(and editable (not (eq (vc-cvs-checkout-model file) 'implicit))
(if vc-cvs-use-edit
(vc-cvs-command nil 0 file "edit")
(set-file-modes file (logior (file-modes file) 128))
(if file-buffer (toggle-read-only -1))))
;; Check out a particular version (or recreate the file).
(vc-file-setprop file 'vc-workfile-version nil)
(apply 'vc-cvs-command nil 0 file
(and editable
(or (not (file-exists-p file))
(not (eq (vc-cvs-checkout-model file)
'implicit)))
"-w")
"update"
;; default for verbose checkout: clear the sticky tag so
;; that the actual update will get the head of the trunk
(if (or (not rev) (string= rev ""))
"-A"
(concat "-r" rev))
switches))))
(vc-mode-line file)
(message "Checking out %s...done" filename)))))
(defun vc-cvs-revert (file &optional contents-done)
"Revert FILE to the version it was based on."
(unless contents-done
;; Check out via standard output (caused by the final argument
;; FILE below), so that no sticky tag is set.
(vc-cvs-checkout file nil (vc-workfile-version file) file))
(unless (eq (vc-checkout-model file) 'implicit)
(if vc-cvs-use-edit
(vc-cvs-command nil 0 file "unedit")
;; Make the file read-only by switching off all w-bits
(set-file-modes file (logand (file-modes file) 3950)))))
(defun vc-cvs-merge (file first-version &optional second-version)
"Merge changes into current working copy of FILE.
The changes are between FIRST-VERSION and SECOND-VERSION."
(vc-cvs-command nil 0 file
"update" "-kk"
(concat "-j" first-version)
(concat "-j" second-version))
(vc-file-setprop file 'vc-state 'edited)
(save-excursion
(set-buffer (get-buffer "*vc*"))
(goto-char (point-min))
(if (re-search-forward "conflicts during merge" nil t)
1 ; signal error
0))) ; signal success
(defun vc-cvs-merge-news (file)
"Merge in any new changes made to FILE."
(message "Merging changes into %s..." file)
(save-excursion
;; (vc-file-setprop file 'vc-workfile-version nil)
(vc-file-setprop file 'vc-checkout-time 0)
(vc-cvs-command nil 0 file "update")
;; Analyze the merge result reported by CVS, and set
;; file properties accordingly.
(set-buffer (get-buffer "*vc*"))
(goto-char (point-min))
;; get new workfile version
(if (re-search-forward (concat "^Merging differences between "
"[01234567890.]* and "
"\\([01234567890.]*\\) into")
nil t)
(vc-file-setprop file 'vc-workfile-version (match-string 1))
(vc-file-setprop file 'vc-workfile-version nil))
;; get file status
(prog1
(if (eq (buffer-size) 0)
0 ;; there were no news; indicate success
(if (re-search-forward
(concat "^\\([CMUP] \\)?"
(regexp-quote (file-name-nondirectory file))
"\\( already contains the differences between \\)?")
nil t)
(cond
;; Merge successful, we are in sync with repository now
((or (match-string 2)
(string= (match-string 1) "U ")
(string= (match-string 1) "P "))
(vc-file-setprop file 'vc-state 'up-to-date)
(vc-file-setprop file 'vc-checkout-time
(nth 5 (file-attributes file)))
0);; indicate success to the caller
;; Merge successful, but our own changes are still in the file
((string= (match-string 1) "M ")
(vc-file-setprop file 'vc-state 'edited)
0);; indicate success to the caller
;; Conflicts detected!
(t
(vc-file-setprop file 'vc-state 'edited)
1);; signal the error to the caller
)
(pop-to-buffer "*vc*")
(error "Couldn't analyze cvs update result")))
(message "Merging changes into %s...done" file))))
;;;
;;; History functions
;;;
(defun vc-cvs-print-log (file)
"Get change log associated with FILE."
(vc-cvs-command
nil
(if (and (vc-cvs-stay-local-p file) (fboundp 'start-process)) 'async 0)
file "log"))
(defun vc-cvs-show-log-entry (version)
(when (re-search-forward
;; also match some context, for safety
(concat "----\nrevision " version
"\\(\tlocked by:.*\n\\|\n\\)date: ") nil t)
;; set the display window so that
;; the whole log entry is displayed
(let (start end lines)
(beginning-of-line) (forward-line -1) (setq start (point))
(if (not (re-search-forward "^----*\nrevision" nil t))
(setq end (point-max))
(beginning-of-line) (forward-line -1) (setq end (point)))
(setq lines (count-lines start end))
(cond
;; if the global information and this log entry fit
;; into the window, display from the beginning
((< (count-lines (point-min) end) (window-height))
(goto-char (point-min))
(recenter 0)
(goto-char start))
;; if the whole entry fits into the window,
;; display it centered
((< (1+ lines) (window-height))
(goto-char start)
(recenter (1- (- (/ (window-height) 2) (/ lines 2)))))
;; otherwise (the entry is too large for the window),
;; display from the start
(t
(goto-char start)
(recenter 0))))))
(defun vc-cvs-diff (file &optional oldvers newvers)
"Get a difference report using CVS between two versions of FILE."
(let (options status (diff-switches-list (vc-diff-switches-list 'CVS)))
(if (string= (vc-workfile-version file) "0")
;; This file is added but not yet committed; there is no master file.
(if (or oldvers newvers)
(error "No revisions of %s exist" file)
;; We regard this as "changed".
;; Diff it against /dev/null.
;; Note: this is NOT a "cvs diff".
(apply 'vc-do-command "*vc-diff*"
1 "diff" file
(append diff-switches-list '("/dev/null"))))
(setq status
(apply 'vc-cvs-command "*vc-diff*"
(if (and (vc-cvs-stay-local-p file)
(fboundp 'start-process))
'async
1)
file "diff"
(and oldvers (concat "-r" oldvers))
(and newvers (concat "-r" newvers))
diff-switches-list))
(if (vc-cvs-stay-local-p file)
1 ;; async diff, pessimistic assumption
status))))
(defun vc-cvs-diff-tree (dir &optional rev1 rev2)
"Diff all files at and below DIR."
(with-current-buffer "*vc-diff*"
(setq default-directory dir)
(if (vc-cvs-stay-local-p dir)
;; local diff: do it filewise, and only for files that are modified
(vc-file-tree-walk
dir
(lambda (f)
(vc-exec-after
`(let ((coding-system-for-read (vc-coding-system-for-diff ',f)))
;; possible optimization: fetch the state of all files
;; in the tree via vc-cvs-dir-state-heuristic
(unless (vc-up-to-date-p ',f)
(message "Looking at %s" ',f)
(vc-diff-internal ',f ',rev1 ',rev2))))))
;; cvs diff: use a single call for the entire tree
(let ((coding-system-for-read
(or coding-system-for-read 'undecided)))
(apply 'vc-cvs-command "*vc-diff*" 1 nil "diff"
(and rev1 (concat "-r" rev1))
(and rev2 (concat "-r" rev2))
(vc-diff-switches-list 'CVS))))))
(defun vc-cvs-annotate-command (file buffer &optional version)
"Execute \"cvs annotate\" on FILE, inserting the contents in BUFFER.
Optional arg VERSION is a version to annotate from."
(vc-cvs-command buffer 0 file "annotate" (if version
(concat "-r" version))))
(defun vc-cvs-annotate-current-time ()
"Return the current time, based at midnight of the current day, and
encoded as fractional days."
(vc-annotate-convert-time
(apply 'encode-time 0 0 0 (nthcdr 3 (decode-time (current-time))))))
(defun vc-cvs-annotate-time ()
"Return the time of the next annotation (as fraction of days)
systime, or nil if there is none."
(let ((time-stamp
"^\\S-+\\s-+\\S-+\\s-+\\([0-9]+\\)-\\(\\sw+\\)-\\([0-9]+\\)): "))
(if (looking-at time-stamp)
(progn
(let* ((day (string-to-number (match-string 1)))
(month (cdr (assoc (match-string 2)
vc-cvs-local-month-numbers)))
(year-tmp (string-to-number (match-string 3)))
;; Years 0..68 are 2000..2068.
;; Years 69..99 are 1969..1999.
(year (+ (cond ((> 69 year-tmp) 2000)
((> 100 year-tmp) 1900)
(t 0))
year-tmp)))
(goto-char (match-end 0)) ; Position at end makes for nicer overlay result
(vc-annotate-convert-time (encode-time 0 0 0 day month year))))
;; If we did not look directly at an annotation, there might be
;; some further down. This is the case if we are positioned at
;; the very top of the buffer, for instance.
(if (re-search-forward time-stamp nil t)
(progn
(beginning-of-line nil)
(vc-cvs-annotate-time))))))
;;;
;;; Snapshot system
;;;
(defun vc-cvs-create-snapshot (dir name branchp)
"Assign to DIR's current version a given NAME.
If BRANCHP is non-nil, the name is created as a branch (and the current
workspace is immediately moved to that new branch)."
(vc-cvs-command nil 0 dir "tag" "-c" (if branchp "-b") name)
(when branchp (vc-cvs-command nil 0 dir "update" "-r" name)))
(defun vc-cvs-retrieve-snapshot (dir name update)
"Retrieve a snapshot at and below DIR.
NAME is the name of the snapshot; if it is empty, do a `cvs update'.
If UPDATE is non-nil, then update (resynch) any affected buffers."
(with-current-buffer (get-buffer-create "*vc*")
(let ((default-directory dir)
(sticky-tag))
(erase-buffer)
(if (or (not name) (string= name ""))
(vc-cvs-command t 0 nil "update")
(vc-cvs-command t 0 nil "update" "-r" name)
(setq sticky-tag name))
(when update
(goto-char (point-min))
(while (not (eobp))
(if (looking-at "\\([CMUP]\\) \\(.*\\)")
(let* ((file (expand-file-name (match-string 2) dir))
(state (match-string 1))
(buffer (find-buffer-visiting file)))
(when buffer
(cond
((or (string= state "U")
(string= state "P"))
(vc-file-setprop file 'vc-state 'up-to-date)
(vc-file-setprop file 'vc-workfile-version nil)
(vc-file-setprop file 'vc-checkout-time
(nth 5 (file-attributes file))))
((or (string= state "M")
(string= state "C"))
(vc-file-setprop file 'vc-state 'edited)
(vc-file-setprop file 'vc-workfile-version nil)
(vc-file-setprop file 'vc-checkout-time 0)))
(vc-file-setprop file 'vc-cvs-sticky-tag sticky-tag)
(vc-resynch-buffer file t t))))
(forward-line 1))))))
;;;
;;; Miscellaneous
;;;
(defun vc-cvs-make-version-backups-p (file)
"Return non-nil if version backups should be made for FILE."
(vc-cvs-stay-local-p file))
(defun vc-cvs-check-headers ()
"Check if the current file has any headers in it."
(save-excursion
(goto-char (point-min))
(re-search-forward "\\$[A-Za-z\300-\326\330-\366\370-\377]+\
\\(: [\t -#%-\176\240-\377]*\\)?\\$" nil t)))
;;;
;;; Internal functions
;;;
(defun vc-cvs-command (buffer okstatus file &rest flags)
"A wrapper around `vc-do-command' for use in vc-cvs.el.
The difference to vc-do-command is that this function always invokes `cvs',
and that it passes `vc-cvs-global-switches' to it before FLAGS."
(apply 'vc-do-command buffer okstatus "cvs" file
(if (stringp vc-cvs-global-switches)
(cons vc-cvs-global-switches flags)
(append vc-cvs-global-switches
flags))))
(defun vc-cvs-stay-local-p (file)
"Return non-nil if VC should stay local when handling FILE."
(if vc-cvs-stay-local
(let* ((dirname (if (file-directory-p file)
(directory-file-name file)
(file-name-directory file)))
(prop
(or (vc-file-getprop dirname 'vc-cvs-stay-local-p)
(let ((rootname (expand-file-name "CVS/Root" dirname)))
(vc-file-setprop
dirname 'vc-cvs-stay-local-p
(when (file-readable-p rootname)
(with-temp-buffer
(vc-insert-file rootname)
(goto-char (point-min))
(if (looking-at "\\([^:]*\\):")
(if (not (stringp vc-cvs-stay-local))
'yes
(let ((hostname (match-string 1)))
(if (string-match vc-cvs-stay-local hostname)
'yes
'no)))
'no))))))))
(if (eq prop 'yes) t nil))))
(defun vc-cvs-parse-status (&optional full)
"Parse output of \"cvs status\" command in the current buffer.
Set file properties accordingly. Unless FULL is t, parse only
essential information."
(let (file status)
(goto-char (point-min))
(if (re-search-forward "^File: " nil t)
(cond
((looking-at "no file") nil)
((re-search-forward "\\=\\([^ \t]+\\)" nil t)
(setq file (expand-file-name (match-string 1)))
(vc-file-setprop file 'vc-backend 'CVS)
(if (not (re-search-forward "\\=[ \t]+Status: \\(.*\\)" nil t))
(setq status "Unknown")
(setq status (match-string 1)))
(if (and full
(re-search-forward
"\\(RCS Version\\|RCS Revision\\|Repository revision\\):\
\[\t ]+\\([0-9.]+\\)"
nil t))
(vc-file-setprop file 'vc-latest-version (match-string 2)))
(vc-file-setprop
file 'vc-state
(cond
((string-match "Up-to-date" status)
(vc-file-setprop file 'vc-checkout-time
(nth 5 (file-attributes file)))
'up-to-date)
((string-match "Locally Modified" status) 'edited)
((string-match "Needs Merge" status) 'needs-merge)
((string-match "Needs \\(Checkout\\|Patch\\)" status) 'needs-patch)
(t 'edited))))))))
(defun vc-cvs-dir-state-heuristic (dir)
"Find the CVS state of all files in DIR, using only local information."
(with-temp-buffer
(vc-insert-file (expand-file-name "CVS/Entries" dir))
(goto-char (point-min))
(while (not (eobp))
;; CVS-removed files are not taken under VC control.
(when (looking-at "/\\([^/]*\\)/[^/-]")
(let ((file (expand-file-name (match-string 1) dir)))
(unless (vc-file-getprop file 'vc-state)
(vc-cvs-parse-entry file t))))
(forward-line 1))))
(defun vc-cvs-valid-symbolic-tag-name-p (tag)
"Return non-nil if TAG is a valid symbolic tag name."
;; According to the CVS manual, a valid symbolic tag must start with
;; an uppercase or lowercase letter and can contain uppercase and
;; lowercase letters, digits, `-', and `_'.
(and (string-match "^[a-zA-Z]" tag)
(not (string-match "[^a-z0-9A-Z-_]" tag))))
(defun vc-cvs-valid-version-number-p (tag)
"Return non-nil if TAG is a valid version number."
(and (string-match "^[0-9]" tag)
(not (string-match "[^0-9.]" tag))))
(defun vc-cvs-parse-sticky-tag (match-type match-tag)
"Parse and return the sticky tag as a string.
`match-data' is protected."
(let ((data (match-data))
(tag)
(type (cond ((string= match-type "D") 'date)
((string= match-type "T")
(if (vc-cvs-valid-symbolic-tag-name-p match-tag)
'symbolic-name
'revision-number))
(t nil))))
(unwind-protect
(progn
(cond
;; Sticky Date tag. Convert to a proper date value (`encode-time')
((eq type 'date)
(string-match
"\\([0-9]+\\)\\.\\([0-9]+\\)\\.\\([0-9]+\\)\\.\\([0-9]+\\)\\.\\([0-9]+\\)\\.\\([0-9]+\\)"
match-tag)
(let* ((year-tmp (string-to-number (match-string 1 match-tag)))
(month (string-to-number (match-string 2 match-tag)))
(day (string-to-number (match-string 3 match-tag)))
(hour (string-to-number (match-string 4 match-tag)))
(min (string-to-number (match-string 5 match-tag)))
(sec (string-to-number (match-string 6 match-tag)))
;; Years 0..68 are 2000..2068.
;; Years 69..99 are 1969..1999.
(year (+ (cond ((> 69 year-tmp) 2000)
((> 100 year-tmp) 1900)
(t 0))
year-tmp)))
(setq tag (encode-time sec min hour day month year))))
;; Sticky Tag name or revision number
((eq type 'symbolic-name) (setq tag match-tag))
((eq type 'revision-number) (setq tag match-tag))
;; Default is no sticky tag at all
(t nil))
(cond ((eq vc-cvs-sticky-tag-display nil) nil)
((eq vc-cvs-sticky-tag-display t)
(cond ((eq type 'date) (format-time-string
vc-cvs-sticky-date-format-string
tag))
((eq type 'symbolic-name) tag)
((eq type 'revision-number) tag)
(t nil)))
((functionp vc-cvs-sticky-tag-display)
(funcall vc-cvs-sticky-tag-display tag type))
(t nil)))
(set-match-data data))))
(defun vc-cvs-parse-entry (file &optional set-state)
"Parse a line from CVS/Entries.
Compare modification time to that of the FILE, set file properties
accordingly. However, `vc-state' is set only if optional arg SET-STATE
is non-nil."
(cond
;; entry for a "locally added" file (not yet committed)
((looking-at "/[^/]+/0/")
(vc-file-setprop file 'vc-checkout-time 0)
(vc-file-setprop file 'vc-workfile-version "0")
(if set-state (vc-file-setprop file 'vc-state 'edited)))
;; normal entry
((looking-at
(concat "/[^/]+"
;; revision
"/\\([^/]*\\)"
;; timestamp
"/\\([^/]*\\)"
;; optional conflict field
"\\(+[^/]*\\)?/"
;; options
"\\([^/]*\\)/"
;; sticky tag
"\\(.\\|\\)" ;Sticky tag type (date or tag name, could be empty)
"\\(.*\\)")) ;Sticky tag
(vc-file-setprop file 'vc-workfile-version (match-string 1))
(vc-file-setprop file 'vc-cvs-sticky-tag
(vc-cvs-parse-sticky-tag (match-string 5) (match-string 6)))
;; compare checkout time and modification time
(let ((mtime (nth 5 (file-attributes file)))
(system-time-locale "C"))
(cond ((equal (format-time-string "%c" mtime 'utc) (match-string 2))
(vc-file-setprop file 'vc-checkout-time mtime)
(if set-state (vc-file-setprop file 'vc-state 'up-to-date)))
(t
(vc-file-setprop file 'vc-checkout-time 0)
(if set-state (vc-file-setprop file 'vc-state 'edited))))))))
(provide 'vc-cvs)
;;; vc-cvs.el ends here
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