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|
;;; vc-svn.el --- non-resident support for Subversion version-control
;; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
;; Author: FSF (see vc.el for full credits)
;; Maintainer: Stefan Monnier <monnier@gnu.org>
;; 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 3, 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., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; This is preliminary support for Subversion (http://subversion.tigris.org/).
;; It started as `sed s/cvs/svn/ vc.cvs.el' (from version 1.56)
;; and hasn't been completely fixed since.
;; Sync'd with Subversion's vc-svn.el as of revision 5801.
;;; Bugs:
;; - VC-dired is (really) slow.
;;; Code:
(eval-when-compile
(require 'vc))
;;;
;;; Customization options
;;;
(defcustom vc-svn-global-switches nil
"*Global switches to pass to any SVN command."
:type '(choice (const :tag "None" nil)
(string :tag "Argument String")
(repeat :tag "Argument List"
:value ("")
string))
:version "22.1"
:group 'vc)
(defcustom vc-svn-register-switches nil
"*Extra switches for registering a file into SVN.
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 "22.1"
:group 'vc)
(defcustom vc-svn-diff-switches
t ;`svn' doesn't support common args like -c or -b.
"String or list of strings specifying extra switches for svn diff under VC.
If nil, use the value of `vc-diff-switches'.
If you want to force an empty list of arguments, use t."
:type '(choice (const :tag "Unspecified" nil)
(const :tag "None" t)
(string :tag "Argument String")
(repeat :tag "Argument List"
:value ("")
string))
:version "22.1"
:group 'vc)
(defcustom vc-svn-header (or (cdr (assoc 'SVN vc-header-alist)) '("\$Id\$"))
"*Header keywords to be inserted by `vc-insert-headers'."
:version "22.1"
:type '(repeat string)
:group 'vc)
;; We want to autoload it for use by the autoloaded version of
;; vc-svn-registered, but we want the value to be compiled at startup, not
;; at dump time.
;; ;;;###autoload
(defconst vc-svn-admin-directory
(cond ((and (memq system-type '(cygwin windows-nt ms-dos))
(getenv "SVN_ASP_DOT_NET_HACK"))
"_svn")
(t ".svn"))
"The name of the \".svn\" subdirectory or its equivalent.")
;;;
;;; State-querying functions
;;;
;;; vc-svn-admin-directory is generally not defined when the
;;; autoloaded function is called.
;;;###autoload (defun vc-svn-registered (f)
;;;###autoload (let ((admin-dir (cond ((and (eq system-type 'windows-nt)
;;;###autoload (getenv "SVN_ASP_DOT_NET_HACK"))
;;;###autoload "_svn")
;;;###autoload (t ".svn"))))
;;;###autoload (when (file-readable-p (expand-file-name
;;;###autoload (concat admin-dir "/entries")
;;;###autoload (file-name-directory f)))
;;;###autoload (load "vc-svn")
;;;###autoload (vc-svn-registered f))))
;;;###autoload
(add-to-list 'completion-ignored-extensions ".svn/")
(defun vc-svn-registered (file)
"Check if FILE is SVN registered."
(when (file-readable-p (expand-file-name (concat vc-svn-admin-directory
"/entries")
(file-name-directory file)))
(with-temp-buffer
(cd (file-name-directory file))
(let ((status
(condition-case nil
;; Ignore all errors.
(vc-svn-command t t file "status" "-v")
;; Some problem happened. E.g. We can't find an `svn'
;; executable. We used to only catch `file-error' but when
;; the process is run on a remote host via Tramp, the error
;; is only reported via the exit status which is turned into
;; an `error' by vc-do-command.
(error nil))))
(when (eq 0 status)
(vc-svn-parse-status file))))))
(defun vc-svn-state (file &optional localp)
"SVN-specific version of `vc-state'."
(setq localp (or localp (vc-stay-local-p file)))
(with-temp-buffer
(cd (file-name-directory file))
(vc-svn-command t 0 file "status" (if localp "-v" "-u"))
(vc-svn-parse-status file)))
(defun vc-svn-state-heuristic (file)
"SVN-specific state heuristic."
(vc-svn-state file 'local))
(defun vc-svn-dir-state (dir &optional localp)
"Find the SVN state of all files in DIR."
(setq localp (or localp (vc-stay-local-p 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-svn-command t 0 nil "status" (if localp "-v" "-u"))
(vc-svn-parse-status))))
(defun vc-svn-workfile-version (file)
"SVN-specific version of `vc-workfile-version'."
;; There is no need to consult RCS headers under SVN, because we
;; get the workfile version for free when we recognize that a file
;; is registered in SVN.
(vc-svn-registered file)
(vc-file-getprop file 'vc-workfile-version))
(defun vc-svn-checkout-model (file)
"SVN-specific version of `vc-checkout-model'."
;; It looks like Subversion has no equivalent of CVSREAD.
'implicit)
;; vc-svn-mode-line-string doesn't exist because the default implementation
;; works just fine.
(defun vc-svn-dired-state-info (file)
"SVN-specific version of `vc-dired-state-info'."
(let ((svn-state (vc-state file)))
(cond ((eq svn-state 'edited)
(if (equal (vc-workfile-version file) "0")
"(added)" "(modified)"))
((eq svn-state 'needs-patch) "(patch)")
((eq svn-state 'needs-merge) "(merge)"))))
(defun vc-svn-previous-version (file rev)
(let ((newrev (1- (string-to-number rev))))
(when (< 0 newrev)
(number-to-string newrev))))
(defun vc-svn-next-version (file rev)
(let ((newrev (1+ (string-to-number rev))))
;; The "workfile version" is an uneasy conceptual fit under Subversion;
;; we use it as the upper bound until a better idea comes along. If the
;; workfile version W coincides with the tree's latest revision R, then
;; this check prevents a "no such revision: R+1" error. Otherwise, it
;; inhibits showing of W+1 through R, which could be considered anywhere
;; from gracious to impolite.
(unless (< (string-to-number (vc-file-getprop file 'vc-workfile-version))
newrev)
(number-to-string newrev))))
;;;
;;; State-changing functions
;;;
(defun vc-svn-register (file &optional rev comment)
"Register FILE into the SVN version-control system.
COMMENT can be used to provide an initial description of FILE.
`vc-register-switches' and `vc-svn-register-switches' are passed to
the SVN command (in that order)."
(apply 'vc-svn-command nil 0 file "add" (vc-switches 'SVN 'register)))
(defun vc-svn-responsible-p (file)
"Return non-nil if SVN thinks it is responsible for FILE."
(file-directory-p (expand-file-name vc-svn-admin-directory
(if (file-directory-p file)
file
(file-name-directory file)))))
(defalias 'vc-svn-could-register 'vc-svn-responsible-p
"Return non-nil if FILE could be registered in SVN.
This is only possible if SVN is responsible for FILE's directory.")
(defun vc-svn-checkin (file rev comment)
"SVN-specific version of `vc-backend-checkin'."
(let ((status (apply
'vc-svn-command nil 1 file "ci"
(nconc (list "-m" comment) (vc-switches 'SVN 'checkin)))))
(set-buffer "*vc*")
(goto-char (point-min))
(unless (equal status 0)
;; Check checkin problem.
(cond
((search-forward "Transaction is out of date" 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))
))
(defun vc-svn-find-version (file rev buffer)
(apply 'vc-svn-command
buffer 0 file
"cat"
(and rev (not (string= rev ""))
(concat "-r" rev))
(vc-switches 'SVN 'checkout)))
(defun vc-svn-checkout (file &optional editable rev)
(message "Checking out %s..." file)
(with-current-buffer (or (get-file-buffer file) (current-buffer))
(vc-call update file editable rev (vc-switches 'SVN 'checkout)))
(vc-mode-line file)
(message "Checking out %s...done" file))
(defun vc-svn-update (file editable rev switches)
(if (and (file-exists-p file) (not rev))
;; If no revision was specified, there's nothing to do.
nil
;; Check out a particular version (or recreate the file).
(vc-file-setprop file 'vc-workfile-version nil)
(apply 'vc-svn-command nil 0 file
"update"
;; default for verbose checkout: clear the sticky tag so
;; that the actual update will get the head of the trunk
(cond
((null rev) "-rBASE")
((or (eq rev t) (equal rev "")) nil)
(t (concat "-r" rev)))
switches)))
(defun vc-svn-delete-file (file)
(vc-svn-command nil 0 file "remove"))
(defun vc-svn-rename-file (old new)
(vc-svn-command nil 0 new "move" (file-relative-name old)))
(defun vc-svn-revert (file &optional contents-done)
"Revert FILE to the version it was based on."
(unless contents-done
(vc-svn-command nil 0 file "revert")))
(defun vc-svn-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-svn-command nil 0 file
"merge"
"-r" (if second-version
(concat first-version ":" second-version)
first-version))
(vc-file-setprop file 'vc-state 'edited)
(with-current-buffer (get-buffer "*vc*")
(goto-char (point-min))
(if (looking-at "C ")
1 ; signal conflict
0))) ; signal success
(defun vc-svn-merge-news (file)
"Merge in any new changes made to FILE."
(message "Merging changes into %s..." file)
;; (vc-file-setprop file 'vc-workfile-version nil)
(vc-file-setprop file 'vc-checkout-time 0)
(vc-svn-command nil 0 file "update")
;; Analyze the merge result reported by SVN, and set
;; file properties accordingly.
(with-current-buffer (get-buffer "*vc*")
(goto-char (point-min))
;; get new workfile version
(if (re-search-forward
"^\\(Updated to\\|At\\) revision \\([0-9]+\\)" nil t)
(vc-file-setprop file 'vc-workfile-version (match-string 2))
(vc-file-setprop file 'vc-workfile-version nil))
;; get file status
(goto-char (point-min))
(prog1
(if (looking-at "At revision")
0 ;; there were no news; indicate success
(if (re-search-forward
;; Newer SVN clients have 3 columns of chars (one for the
;; file's contents, then second for its properties, and the
;; third for lock-grabbing info), before the 2 spaces.
;; We also used to match the filename in column 0 without any
;; meta-info before it, but I believe this can never happen.
(concat "^\\(\\([ACGDU]\\)\\(.[B ]\\)? \\)"
(regexp-quote (file-name-nondirectory file)))
nil t)
(cond
;; Merge successful, we are in sync with repository now
((string= (match-string 2) "U")
(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 2) "G")
(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 svn update result")))
(message "Merging changes into %s...done" file))))
;;;
;;; History functions
;;;
(defun vc-svn-print-log (file &optional buffer)
"Get change log associated with FILE."
(save-current-buffer
(vc-setup-buffer buffer)
(let ((inhibit-read-only t))
(goto-char (point-min))
;; Add a line to tell log-view-mode what file this is.
(insert "Working file: " (file-relative-name file) "\n"))
(vc-svn-command
buffer
(if (and (vc-stay-local-p file) (fboundp 'start-process)) 'async 0)
file "log"
;; By default Subversion only shows the log upto the working version,
;; whereas we also want the log of the subsequent commits. At least
;; that's what the vc-cvs.el code does.
"-rHEAD:0")))
(defun vc-svn-diff (file &optional oldvers newvers buffer)
"Get a difference report using SVN between two versions of FILE."
(unless buffer (setq buffer "*vc-diff*"))
(if (and oldvers (equal oldvers (vc-workfile-version file)))
;; Use nil rather than the current revision because svn handles it
;; better (i.e. locally).
(setq oldvers nil))
(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 "svn diff".
(apply 'vc-do-command buffer
1 "diff" file
(append (vc-switches nil 'diff) '("/dev/null")))
;; Even if it's empty, it's locally modified.
1)
(let* ((switches
(if vc-svn-diff-switches
(vc-switches 'SVN 'diff)
(list "-x" (mapconcat 'identity (vc-switches nil 'diff) " "))))
(async (and (not vc-disable-async-diff)
(vc-stay-local-p file)
(or oldvers newvers) ; Svn diffs those locally.
(fboundp 'start-process))))
(apply 'vc-svn-command buffer
(if async 'async 0)
file "diff"
(append
switches
(when oldvers
(list "-r" (if newvers (concat oldvers ":" newvers)
oldvers)))))
(if async 1 ; async diff => pessimistic assumption
;; For some reason `svn diff' does not return a useful
;; status w.r.t whether the diff was empty or not.
(buffer-size (get-buffer buffer))))))
(defun vc-svn-diff-tree (dir &optional rev1 rev2)
"Diff all files at and below DIR."
(vc-svn-diff (file-name-as-directory dir) rev1 rev2))
;;;
;;; Snapshot system
;;;
(defun vc-svn-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).
NAME is assumed to be a URL."
(vc-svn-command nil 0 dir "copy" name)
(when branchp (vc-svn-retrieve-snapshot dir name nil)))
(defun vc-svn-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 `svn update'.
If UPDATE is non-nil, then update (resynch) any affected buffers.
NAME is assumed to be a URL."
(vc-svn-command nil 0 dir "switch" name)
;; FIXME: parse the output and obey `update'.
)
;;;
;;; Miscellaneous
;;;
;; Subversion makes backups for us, so don't bother.
;; (defalias 'vc-svn-make-version-backups-p 'vc-stay-local-p
;; "Return non-nil if version backups should be made for FILE.")
(defun vc-svn-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-svn-command (buffer okstatus file &rest flags)
"A wrapper around `vc-do-command' for use in vc-svn.el.
The difference to vc-do-command is that this function always invokes `svn',
and that it passes `vc-svn-global-switches' to it before FLAGS."
(apply 'vc-do-command buffer okstatus "svn" file
(if (stringp vc-svn-global-switches)
(cons vc-svn-global-switches flags)
(append vc-svn-global-switches
flags))))
(defun vc-svn-repository-hostname (dirname)
(with-temp-buffer
(let ((coding-system-for-read
(or file-name-coding-system
default-file-name-coding-system)))
(vc-insert-file (expand-file-name (concat vc-svn-admin-directory
"/entries")
dirname)))
(goto-char (point-min))
(when (re-search-forward
;; Old `svn' used name="svn:this_dir", newer use just name="".
(concat "name=\"\\(?:svn:this_dir\\)?\"[\n\t ]*"
"\\(?:[-a-z]+=\"[^\"]*\"[\n\t ]*\\)*?"
"url=\"\\([^\"]+\\)\"") nil t)
;; This is not a hostname but a URL. This may actually be considered
;; as a feature since it allows vc-svn-stay-local to specify different
;; behavior for different modules on the same server.
(match-string 1))))
(defun vc-svn-resolve-when-done ()
"Call \"svn resolved\" if the conflict markers have been removed."
(save-excursion
(goto-char (point-min))
(unless (re-search-forward "^<<<<<<< " nil t)
(vc-svn-command nil 0 buffer-file-name "resolved")
;; Remove the hook so that it is not called multiple times.
(remove-hook 'after-save-hook 'vc-svn-resolve-when-done t))))
;; Inspired by vc-arch-find-file-hook.
(defun vc-svn-find-file-hook ()
(when (eq ?C (vc-file-getprop buffer-file-name 'vc-svn-status))
;; If the file is marked as "conflicted", then we should try and call
;; "svn resolved" when applicable.
(if (save-excursion
(goto-char (point-min))
(re-search-forward "^<<<<<<< " nil t))
;; There are conflict markers.
(progn
(smerge-mode 1)
(add-hook 'after-save-hook 'vc-svn-resolve-when-done nil t))
;; There are no conflict markers. This is problematic: maybe it means
;; the conflict has been resolved and we should immediately call "svn
;; resolved", or it means that the file's type does not allow Svn to
;; use conflict markers in which case we don't really know what to do.
;; So let's just punt for now.
nil)
(message "There are unresolved conflicts in this file")))
(defun vc-svn-parse-status (&optional filename)
"Parse output of \"svn status\" command in the current buffer.
Set file properties accordingly. Unless FILENAME is non-nil, parse only
information about FILENAME and return its status."
(let (file status)
(goto-char (point-min))
(while (re-search-forward
;; Ignore the files with status in [IX?].
"^[ ACDGMR!~][ MC][ L][ +][ S]..\\([ *]\\) +\\([-0-9]+\\) +\\([0-9?]+\\) +\\([^ ]+\\) +" nil t)
;; If the username contains spaces, the output format is ambiguous,
;; so don't trust the output's filename unless we have to.
(setq file (or filename
(expand-file-name
(buffer-substring (point) (line-end-position)))))
(setq status (char-after (line-beginning-position)))
(unless (eq status ??)
;; `vc-BACKEND-registered' must not set vc-backend,
;; which is instead set in vc-registered.
(unless filename (vc-file-setprop file 'vc-backend 'SVN))
;; Use the last-modified revision, so that searching in vc-print-log
;; output works.
(vc-file-setprop file 'vc-workfile-version (match-string 3))
;; Remember Svn's own status.
(vc-file-setprop file 'vc-svn-status status)
(vc-file-setprop
file 'vc-state
(cond
((eq status ?\ )
(if (eq (char-after (match-beginning 1)) ?*)
'needs-patch
(vc-file-setprop file 'vc-checkout-time
(nth 5 (file-attributes file)))
'up-to-date))
((eq status ?A)
;; If the file was actually copied, (match-string 2) is "-".
(vc-file-setprop file 'vc-workfile-version "0")
(vc-file-setprop file 'vc-checkout-time 0)
'edited)
((memq status '(?M ?C))
(if (eq (char-after (match-beginning 1)) ?*)
'needs-merge
'edited))
(t 'edited)))))
(if filename (vc-file-getprop filename 'vc-state))))
(defun vc-svn-dir-state-heuristic (dir)
"Find the SVN state of all files in DIR, using only local information."
(vc-svn-dir-state dir 'local))
(defun vc-svn-valid-symbolic-tag-name-p (tag)
"Return non-nil if TAG is a valid symbolic tag name."
;; According to the SVN 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-svn-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))))
;; Support for `svn annotate'
(defun vc-svn-annotate-command (file buf &optional rev)
(vc-svn-command buf 0 file "annotate" (if rev (concat "-r" rev))))
(defun vc-svn-annotate-time-of-rev (rev)
;; Arbitrarily assume 10 commmits per day.
(/ (string-to-number rev) 10.0))
(defun vc-svn-annotate-current-time ()
(vc-svn-annotate-time-of-rev vc-annotate-parent-rev))
(defconst vc-svn-annotate-re "[ \t]*\\([0-9]+\\)[ \t]+[^\t ]+ ")
(defun vc-svn-annotate-time ()
(when (looking-at vc-svn-annotate-re)
(goto-char (match-end 0))
(vc-svn-annotate-time-of-rev (match-string 1))))
(defun vc-svn-annotate-extract-revision-at-line ()
(save-excursion
(beginning-of-line)
(if (looking-at vc-svn-annotate-re) (match-string 1))))
(provide 'vc-svn)
;; arch-tag: 02f10c68-2b4d-453a-90fc-1eee6cfb268d
;;; vc-svn.el ends here
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