+++ /dev/null
-;;; vc-sccs.el --- support for SCCS version-control
-
-;; Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
-;; 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
-;; Free Software Foundation, Inc.
-
-;; Author: FSF (see vc.el for full credits)
-;; Maintainer: Andre Spiegel <spiegel@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 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
-
-;;; Commentary:
-
-;; Proper function of the SCCS diff commands requires the shellscript vcdiff
-;; to be installed somewhere on Emacs's path for executables.
-;;
-
-;;; Code:
-
-(eval-when-compile
- (require 'vc))
-
-;;;
-;;; Customization options
-;;;
-
-;; ;; Maybe a better solution is to not use "get" but "sccs get".
-;; (defcustom vc-sccs-path
-;; (let ((path ()))
-;; (dolist (dir '("/usr/sccs" "/usr/lib/sccs" "/usr/libexec/sccs"))
-;; (if (file-directory-p dir)
-;; (push dir path)))
-;; path)
-;; "List of extra directories to search for SCCS commands."
-;; :type '(repeat directory)
-;; :group 'vc)
-
-(defcustom vc-sccs-register-switches nil
- "Switches for registering a file in SCCS.
-A string or list of strings passed to the checkin program by
-\\[vc-register]. If nil, use the value of `vc-register-switches'.
-If t, use no switches."
- :type '(choice (const :tag "Unspecified" nil)
- (const :tag "None" t)
- (string :tag "Argument String")
- (repeat :tag "Argument List" :value ("") string))
- :version "21.1"
- :group 'vc)
-
-(defcustom vc-sccs-diff-switches nil
- "String or list of strings specifying switches for SCCS diff under VC.
-If nil, use the value of `vc-diff-switches'. If t, use no switches."
- :type '(choice (const :tag "Unspecified" nil)
- (const :tag "None" t)
- (string :tag "Argument String")
- (repeat :tag "Argument List" :value ("") string))
- :version "21.1"
- :group 'vc)
-
-(defcustom vc-sccs-header (or (cdr (assoc 'SCCS vc-header-alist)) '("%W%"))
- "Header keywords to be inserted by `vc-insert-headers'."
- :type '(repeat string)
- :group 'vc)
-
-;;;###autoload
-(defcustom vc-sccs-master-templates
- (purecopy '("%sSCCS/s.%s" "%ss.%s" vc-sccs-search-project-dir))
- "Where to look for SCCS master files.
-For a description of possible values, see `vc-check-master-templates'."
- :type '(choice (const :tag "Use standard SCCS file names"
- ("%sSCCS/s.%s" "%ss.%s" vc-sccs-search-project-dir))
- (repeat :tag "User-specified"
- (choice string
- function)))
- :version "21.1"
- :group 'vc)
-
-\f
-;;;
-;;; Internal variables
-;;;
-
-(defconst vc-sccs-name-assoc-file "VC-names")
-
-\f
-;;; Properties of the backend
-
-(defun vc-sccs-revision-granularity () 'file)
-(defun vc-sccs-checkout-model (files) 'locking)
-
-;;;
-;;; State-querying functions
-;;;
-
-;; The autoload cookie below places vc-sccs-registered directly into
-;; loaddefs.el, so that vc-sccs.el does not need to be loaded for
-;; every file that is visited. The definition is repeated below
-;; so that Help and etags can find it.
-
-;;;###autoload (defun vc-sccs-registered(f) (vc-default-registered 'SCCS f))
-(defun vc-sccs-registered (f) (vc-default-registered 'SCCS f))
-
-(defun vc-sccs-state (file)
- "SCCS-specific function to compute the version control state."
- (if (not (vc-sccs-registered file))
- 'unregistered
- (with-temp-buffer
- (if (vc-insert-file (vc-sccs-lock-file file))
- (let* ((locks (vc-sccs-parse-locks))
- (working-revision (vc-working-revision file))
- (locking-user (cdr (assoc working-revision locks))))
- (if (not locking-user)
- (if (vc-workfile-unchanged-p file)
- 'up-to-date
- 'unlocked-changes)
- (if (string= locking-user (vc-user-login-name file))
- 'edited
- locking-user)))
- 'up-to-date))))
-
-(defun vc-sccs-state-heuristic (file)
- "SCCS-specific state heuristic."
- (if (not (vc-mistrust-permissions file))
- ;; This implementation assumes that any file which is under version
- ;; control and has -rw-r--r-- is locked by its owner. This is true
- ;; for both RCS and SCCS, which keep unlocked files at -r--r--r--.
- ;; We have to be careful not to exclude files with execute bits on;
- ;; scripts can be under version control too. Also, we must ignore the
- ;; group-read and other-read bits, since paranoid users turn them off.
- (let* ((attributes (file-attributes file 'string))
- (owner-name (nth 2 attributes))
- (permissions (nth 8 attributes)))
- (if (string-match ".r-..-..-." permissions)
- 'up-to-date
- (if (string-match ".rw..-..-." permissions)
- (if (file-ownership-preserved-p file)
- 'edited
- owner-name)
- ;; Strange permissions.
- ;; Fall through to real state computation.
- (vc-sccs-state file))))
- (vc-sccs-state file)))
-
-(defun vc-sccs-dir-status (dir update-function)
- ;; FIXME: this function should be rewritten, using `vc-expand-dirs'
- ;; is not TRTD because it returns files from multiple backends.
- ;; It should also return 'unregistered files.
-
- ;; Doing lots of individual VC-state calls is painful, but
- ;; there is no better option in SCCS-land.
- (let ((flist (vc-expand-dirs (list dir)))
- (result nil))
- (dolist (file flist)
- (let ((state (vc-state file))
- (frel (file-relative-name file)))
- (when (and (eq (vc-backend file) 'SCCS)
- (not (eq state 'up-to-date)))
- (push (list frel state) result))))
- (funcall update-function result)))
-
-(defun vc-sccs-working-revision (file)
- "SCCS-specific version of `vc-working-revision'."
- (with-temp-buffer
- ;; The working revision is always the latest revision number.
- ;; To find this number, search the entire delta table,
- ;; rather than just the first entry, because the
- ;; first entry might be a deleted ("R") revision.
- (vc-insert-file (vc-name file) "^\001e\n\001[^s]")
- (vc-parse-buffer "^\001d D \\([^ ]+\\)" 1)))
-
-(defun vc-sccs-workfile-unchanged-p (file)
- "SCCS-specific implementation of `vc-workfile-unchanged-p'."
- (zerop (apply 'vc-do-command "*vc*" 1 "vcdiff" (vc-name file)
- (list "--brief" "-q"
- (concat "-r" (vc-working-revision file))))))
-
-\f
-;;;
-;;; State-changing functions
-;;;
-
-(defun vc-sccs-do-command (buffer okstatus command file-or-list &rest flags)
- ;; (let ((load-path (append vc-sccs-path load-path)))
- ;; (apply 'vc-do-command buffer okstatus command file-or-list flags))
- (apply 'vc-do-command (or buffer "*vc*") okstatus "sccs" file-or-list command flags))
-
-(defun vc-sccs-create-repo ()
- "Create a new SCCS repository."
- ;; SCCS is totally file-oriented, so all we have to do is make the directory
- (make-directory "SCCS"))
-
-(defun vc-sccs-register (files &optional rev comment)
- "Register FILES into the SCCS version-control system.
-REV is the optional revision number for the file. COMMENT can be used
-to provide an initial description of FILES.
-Passes either `vc-sccs-register-switches' or `vc-register-switches'
-to the SCCS command.
-
-Automatically retrieve a read-only version of the files with keywords
-expanded if `vc-keep-workfiles' is non-nil, otherwise, delete the workfile."
- (dolist (file files)
- (let* ((dirname (or (file-name-directory file) ""))
- (basename (file-name-nondirectory file))
- (project-file (vc-sccs-search-project-dir dirname basename)))
- (let ((vc-name
- (or project-file
- (format (car vc-sccs-master-templates) dirname basename))))
- (apply 'vc-sccs-do-command nil 0 "admin" vc-name
- (and rev (not (string= rev "")) (concat "-r" rev))
- "-fb"
- (concat "-i" (file-relative-name file))
- (and comment (concat "-y" comment))
- (vc-switches 'SCCS 'register)))
- (delete-file file)
- (if vc-keep-workfiles
- (vc-sccs-do-command nil 0 "get" (vc-name file))))))
-
-(defun vc-sccs-responsible-p (file)
- "Return non-nil if SCCS thinks it would be responsible for registering FILE."
- ;; TODO: check for all the patterns in vc-sccs-master-templates
- (or (file-directory-p (expand-file-name "SCCS" (file-name-directory file)))
- (stringp (vc-sccs-search-project-dir (or (file-name-directory file) "")
- (file-name-nondirectory file)))))
-
-(defun vc-sccs-checkin (files rev comment)
- "SCCS-specific version of `vc-backend-checkin'."
- (dolist (file (vc-expand-dirs files))
- (apply 'vc-sccs-do-command nil 0 "delta" (vc-name file)
- (if rev (concat "-r" rev))
- (concat "-y" comment)
- (vc-switches 'SCCS 'checkin))
- (if vc-keep-workfiles
- (vc-sccs-do-command nil 0 "get" (vc-name file)))))
-
-(defun vc-sccs-find-revision (file rev buffer)
- (apply 'vc-sccs-do-command
- buffer 0 "get" (vc-name file)
- "-s" ;; suppress diagnostic output
- "-p"
- (and rev
- (concat "-r"
- (vc-sccs-lookup-triple file rev)))
- (vc-switches 'SCCS 'checkout)))
-
-(defun vc-sccs-checkout (file &optional editable rev)
- "Retrieve a copy of a saved revision of SCCS controlled FILE.
-If FILE is a directory, all version-controlled files beneath are checked out.
-EDITABLE non-nil means that the file should be writable and
-locked. REV is the revision to check out."
- (if (file-directory-p file)
- (mapc 'vc-sccs-checkout (vc-expand-dirs (list file)))
- (let ((file-buffer (get-file-buffer file))
- switches)
- (message "Checking out %s..." file)
- (save-excursion
- ;; Change buffers to get local value of vc-checkout-switches.
- (if file-buffer (set-buffer file-buffer))
- (setq switches (vc-switches 'SCCS 'checkout))
- ;; 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 file))
-
- (and rev (or (string= rev "")
- (not (stringp rev)))
- (setq rev nil))
- (apply 'vc-sccs-do-command nil 0 "get" (vc-name file)
- (if editable "-e")
- (and rev (concat "-r" (vc-sccs-lookup-triple file rev)))
- switches))))
- (message "Checking out %s...done" file))))
-
-(defun vc-sccs-rollback (files)
- "Roll back, undoing the most recent checkins of FILES. Directories
-are expanded to all version-controlled subfiles."
- (setq files (vc-expand-dirs files))
- (if (not files)
- (error "SCCS backend doesn't support directory-level rollback"))
- (dolist (file files)
- (let ((discard (vc-working-revision file)))
- (if (null (yes-or-no-p (format "Remove version %s from %s history? "
- discard file)))
- (error "Aborted"))
- (message "Removing revision %s from %s..." discard file)
- (vc-sccs-do-command nil 0 "rmdel"
- (vc-name file) (concat "-r" discard))
- (vc-sccs-do-command nil 0 "get" (vc-name file) nil))))
-
-(defun vc-sccs-revert (file &optional contents-done)
- "Revert FILE to the version it was based on. If FILE is a directory,
-revert all subfiles."
- (if (file-directory-p file)
- (mapc 'vc-sccs-revert (vc-expand-dirs (list file)))
- (vc-sccs-do-command nil 0 "unget" (vc-name file))
- (vc-sccs-do-command nil 0 "get" (vc-name file))
- ;; Checking out explicit revisions is not supported under SCCS, yet.
- ;; We always "revert" to the latest revision; therefore
- ;; vc-working-revision is cleared here so that it gets recomputed.
- (vc-file-setprop file 'vc-working-revision nil)))
-
-(defun vc-sccs-steal-lock (file &optional rev)
- "Steal the lock on the current workfile for FILE and revision REV."
- (if (file-directory-p file)
- (mapc 'vc-sccs-steal-lock (vc-expand-dirs (list file)))
- (vc-sccs-do-command nil 0 "unget"
- (vc-name file) "-n" (if rev (concat "-r" rev)))
- (vc-sccs-do-command nil 0 "get"
- (vc-name file) "-g" (if rev (concat "-r" rev)))))
-
-(defun vc-sccs-modify-change-comment (files rev comment)
- "Modify (actually, append to) the change comments for FILES on a specified REV."
- (dolist (file (vc-expand-dirs files))
- (vc-sccs-do-command nil 0 "cdc" (vc-name file)
- (concat "-y" comment) (concat "-r" rev))))
-
-\f
-;;;
-;;; History functions
-;;;
-
-(defun vc-sccs-print-log (files buffer &optional shortlog start-revision-ignored limit)
- "Get change log associated with FILES."
- (setq files (vc-expand-dirs files))
- (vc-sccs-do-command buffer 0 "prs" (mapcar 'vc-name files))
- (when limit 'limit-unsupported))
-
-(defun vc-sccs-diff (files &optional oldvers newvers buffer)
- "Get a difference report using SCCS between two filesets."
- (setq files (vc-expand-dirs files))
- (setq oldvers (vc-sccs-lookup-triple (car files) oldvers))
- (setq newvers (vc-sccs-lookup-triple (car files) newvers))
- (apply 'vc-do-command (or buffer "*vc-diff*")
- 1 "vcdiff" (mapcar 'vc-name (vc-expand-dirs files))
- (append (list "-q"
- (and oldvers (concat "-r" oldvers))
- (and newvers (concat "-r" newvers)))
- (vc-switches 'SCCS 'diff))))
-
-\f
-;;;
-;;; Tag system. SCCS doesn't have tags, so we simulate them by maintaining
-;;; our own set of name-to-revision mappings.
-;;;
-
-(defun vc-sccs-create-tag (backend dir name branchp)
- (when branchp
- (error "SCCS backend %s does not support module branches" backend))
- (let ((result (vc-tag-precondition dir)))
- (if (stringp result)
- (error "File %s is not up-to-date" result)
- (vc-file-tree-walk
- dir
- (lambda (f)
- (vc-sccs-add-triple name f (vc-working-revision f)))))))
-
-\f
-;;;
-;;; Miscellaneous
-;;;
-
-(defun vc-sccs-previous-revision (file rev)
- (vc-call-backend 'RCS 'previous-revision file rev))
-
-(defun vc-sccs-next-revision (file rev)
- (vc-call-backend 'RCS 'next-revision file rev))
-
-(defun vc-sccs-check-headers ()
- "Check if the current file has any headers in it."
- (save-excursion
- (goto-char (point-min))
- (re-search-forward "%[A-Z]%" nil t)))
-
-(defun vc-sccs-rename-file (old new)
- ;; Move the master file (using vc-rcs-master-templates).
- (vc-rename-master (vc-name old) new vc-sccs-master-templates)
- ;; Update the tag file.
- (with-current-buffer
- (find-file-noselect
- (expand-file-name vc-sccs-name-assoc-file
- (file-name-directory (vc-name old))))
- (goto-char (point-min))
- ;; (replace-regexp (concat ":" (regexp-quote old) "$") (concat ":" new))
- (while (re-search-forward (concat ":" (regexp-quote old) "$") nil t)
- (replace-match (concat ":" new) nil nil))
- (basic-save-buffer)
- (kill-buffer (current-buffer))))
-
-(defun vc-sccs-find-file-hook ()
- ;; If the file is locked by some other user, make
- ;; the buffer read-only. Like this, even root
- ;; cannot modify a file that someone else has locked.
- (and (stringp (vc-state buffer-file-name 'SCCS))
- (setq buffer-read-only t)))
-
-\f
-;;;
-;;; Internal functions
-;;;
-
-;; This function is wrapped with `progn' so that the autoload cookie
-;; copies the whole function itself into loaddefs.el rather than just placing
-;; a (autoload 'vc-sccs-search-project-dir "vc-sccs") which would not
-;; help us avoid loading vc-sccs.
-;;;###autoload
-(progn (defun vc-sccs-search-project-dir (dirname basename)
- "Return the name of a master file in the SCCS project directory.
-Does not check whether the file exists but returns nil if it does not
-find any project directory."
- (let ((project-dir (getenv "PROJECTDIR")) dirs dir)
- (when project-dir
- (if (file-name-absolute-p project-dir)
- (setq dirs '("SCCS" ""))
- (setq dirs '("src/SCCS" "src" "source/SCCS" "source"))
- (setq project-dir (expand-file-name (concat "~" project-dir))))
- (while (and (not dir) dirs)
- (setq dir (expand-file-name (car dirs) project-dir))
- (unless (file-directory-p dir)
- (setq dir nil)
- (setq dirs (cdr dirs))))
- (and dir (expand-file-name (concat "s." basename) dir))))))
-
-(defun vc-sccs-lock-file (file)
- "Generate lock file name corresponding to FILE."
- (let ((master (vc-name file)))
- (and
- master
- (string-match "\\(.*/\\)\\(s\\.\\)\\(.*\\)" master)
- (replace-match "p." t t master 2))))
-
-(defun vc-sccs-parse-locks ()
- "Parse SCCS locks in current buffer.
-The result is a list of the form ((REVISION . USER) (REVISION . USER) ...)."
- (let (master-locks)
- (goto-char (point-min))
- (while (re-search-forward "^\\([0-9.]+\\) [0-9.]+ \\([^ ]+\\) .*\n?"
- nil t)
- (setq master-locks
- (cons (cons (match-string 1) (match-string 2)) master-locks)))
- ;; FIXME: is it really necessary to reverse ?
- (nreverse master-locks)))
-
-(defun vc-sccs-add-triple (name file rev)
- (with-current-buffer
- (find-file-noselect
- (expand-file-name vc-sccs-name-assoc-file
- (file-name-directory (vc-name file))))
- (goto-char (point-max))
- (insert name "\t:\t" file "\t" rev "\n")
- (basic-save-buffer)
- (kill-buffer (current-buffer))))
-
-(defun vc-sccs-lookup-triple (file name)
- "Return the numeric revision corresponding to a named tag of FILE.
-If NAME is nil or a revision number string it's just passed through."
- (if (or (null name)
- (let ((firstchar (aref name 0)))
- (and (>= firstchar ?0) (<= firstchar ?9))))
- name
- (with-temp-buffer
- (vc-insert-file
- (expand-file-name vc-sccs-name-assoc-file
- (file-name-directory (vc-name file))))
- (vc-parse-buffer (concat name "\t:\t" file "\t\\(.+\\)") 1))))
-
-(provide 'vc-sccs)
-
-;; arch-tag: d751dee3-d7b3-47e1-95e3-7ae98c052041
-;;; vc-sccs.el ends here
HCoop / bpt / emacs.git / blobdiff
