+2014-12-08 Eric S. Raymond <esr@snark.thyrsus.com>
+
+ * vc/vc-arch.el: Moved to obsolete directory so a test framework
+ won't trip over bit-rot in it. There has been no Arch snapshot
+ for nine years.
+
2014-12-07 Lars Magne Ingebrigtsen <larsi@gnus.org>
* net/eww.el (eww-follow-link): Revert prefix behaviour to
--- /dev/null
+;;; vc-arch.el --- VC backend for the Arch version-control system -*- lexical-binding: t -*-
+
+;; Copyright (C) 2004-2014 Free Software Foundation, Inc.
+
+;; Author: FSF (see vc.el for full credits)
+;; Maintainer: Stefan Monnier <monnier@gnu.org>
+;; Package: vc
+
+;; 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:
+
+;; The home page of the Arch version control system is at
+;;
+;; http://www.gnuarch.org/
+;;
+;; This is derived from vc-mcvs.el as follows:
+;; - cp vc-mcvs.el vc-arch.el and then M-% mcvs RET arch RET
+;;
+;; Then of course started the hacking.
+;;
+;; What has been partly tested:
+;; - Open a file.
+;; - C-x v = without any prefix arg.
+;; - C-x v v to commit a change to a single file.
+
+;; Bugs:
+
+;; - *vc-log*'s initial content lacks the `Summary:' lines.
+;; - All files under the tree are considered as "under Arch's control"
+;; without regards to =tagging-method and such.
+;; - Files are always considered as `edited'.
+;; - C-x v l does not work.
+;; - C-x v i does not work.
+;; - C-x v ~ does not work.
+;; - C-x v u does not work.
+;; - C-x v s does not work.
+;; - C-x v r does not work.
+;; - VC directory listings do not work.
+;; - And more...
+
+;;; Code:
+
+(eval-when-compile (require 'vc))
+
+;;; Properties of the backend
+
+(defun vc-arch-revision-granularity () 'repository)
+(defun vc-arch-checkout-model (_files) 'implicit)
+
+;;;
+;;; Customization options
+;;;
+
+(defgroup vc-arch nil
+ "VC Arch backend."
+ :version "24.1"
+ :group 'vc)
+
+;; It seems Arch diff does not accept many options, so this is not
+;; very useful. It exists mainly so that the VC backends are all
+;; consistent with regards to their treatment of diff switches.
+(defcustom vc-arch-diff-switches t
+ "String or list of strings specifying switches for Arch 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 "23.1"
+ :group 'vc-arch)
+
+(define-obsolete-variable-alias 'vc-arch-command 'vc-arch-program "23.1")
+
+(defcustom vc-arch-program
+ (let ((candidates '("tla" "baz")))
+ (while (and candidates (not (executable-find (car candidates))))
+ (setq candidates (cdr candidates)))
+ (or (car candidates) "tla"))
+ "Name of the Arch executable."
+ :type 'string
+ :group 'vc-arch)
+
+;; Clear up the cache to force vc-call to check again and discover
+;; new functions when we reload this file.
+(put 'Arch 'vc-functions nil)
+
+;;;###autoload (defun vc-arch-registered (file)
+;;;###autoload (if (vc-find-root file "{arch}/=tagging-method")
+;;;###autoload (progn
+;;;###autoload (load "vc-arch" nil t)
+;;;###autoload (vc-arch-registered file))))
+
+(defun vc-arch-add-tagline ()
+ "Add an `arch-tag' to the end of the current file."
+ (interactive)
+ (comment-normalize-vars)
+ (goto-char (point-max))
+ (forward-comment -1)
+ (skip-chars-forward " \t\n")
+ (cond
+ ((not (bolp)) (insert "\n\n"))
+ ((not (eq ?\n (char-before (1- (point))))) (insert "\n")))
+ (let ((beg (point))
+ (idfile (and buffer-file-name
+ (expand-file-name
+ (concat ".arch-ids/"
+ (file-name-nondirectory buffer-file-name)
+ ".id")
+ (file-name-directory buffer-file-name)))))
+ (insert "arch-tag: ")
+ (if (and idfile (file-exists-p idfile))
+ ;; If the file is unreadable, we do want to get an error here.
+ (progn
+ (insert-file-contents idfile)
+ (forward-line 1)
+ (delete-file idfile))
+ (condition-case nil
+ (call-process "uuidgen" nil t)
+ (file-error (insert (format "%s <%s> %s"
+ (current-time-string)
+ user-mail-address
+ (+ (nth 2 (current-time))
+ (buffer-size)))))))
+ (comment-region beg (point))))
+
+(defconst vc-arch-tagline-re "^\\W*arch-tag:[ \t]*\\(.*[^ \t\n]\\)")
+
+(defmacro vc-with-current-file-buffer (file &rest body)
+ (declare (indent 2) (debug t))
+ `(let ((-kill-buf- nil)
+ (-file- ,file))
+ (with-current-buffer (or (find-buffer-visiting -file-)
+ (setq -kill-buf- (generate-new-buffer " temp")))
+ ;; Avoid find-file-literally since it can do many undesirable extra
+ ;; things (among which, call us back into an infinite loop).
+ (if -kill-buf- (insert-file-contents -file-))
+ (unwind-protect
+ (progn ,@body)
+ (if (buffer-live-p -kill-buf-) (kill-buffer -kill-buf-))))))
+
+(defun vc-arch-file-source-p (file)
+ "Can return nil, `maybe' or a non-nil value.
+Only the value `maybe' can be trusted :-(."
+ ;; FIXME: Check the tag and name of parent dirs.
+ (unless (string-match "\\`[,+]" (file-name-nondirectory file))
+ (or (string-match "\\`{arch}/"
+ (file-relative-name file (vc-arch-root file)))
+ (file-exists-p
+ ;; Check the presence of an ID file.
+ (expand-file-name
+ (concat ".arch-ids/" (file-name-nondirectory file) ".id")
+ (file-name-directory file)))
+ ;; Check the presence of a tagline.
+ (vc-with-current-file-buffer file
+ (save-excursion
+ (goto-char (point-max))
+ (or (re-search-backward vc-arch-tagline-re (- (point) 1000) t)
+ (progn
+ (goto-char (point-min))
+ (re-search-forward vc-arch-tagline-re (+ (point) 1000) t)))))
+ ;; FIXME: check =tagging-method to see whether untagged files might
+ ;; be source or not.
+ (with-current-buffer
+ (find-file-noselect (expand-file-name "{arch}/=tagging-method"
+ (vc-arch-root file)))
+ (let ((untagged-source t)) ;Default is `names'.
+ (save-excursion
+ (goto-char (point-min))
+ (if (re-search-forward "^[ \t]*\\(\\(tagline\\|implicit\\|names\\)\\|explicit\\)" nil t)
+ (setq untagged-source (match-end 2)))
+ (if (re-search-forward "^[ \t]*untagged-source[ \t]+\\(\\(source\\)\\|precious\\|backup\\|junk\\|unrecognized\\)" nil t)
+ (setq untagged-source (match-end 2))))
+ (if untagged-source 'maybe))))))
+
+(defun vc-arch-file-id (file)
+ ;; Don't include the kind of ID this is because it seems to be too messy.
+ (let ((idfile (expand-file-name
+ (concat ".arch-ids/" (file-name-nondirectory file) ".id")
+ (file-name-directory file))))
+ (if (file-exists-p idfile)
+ (with-temp-buffer
+ (insert-file-contents idfile)
+ (looking-at ".*[^ \n\t]")
+ (match-string 0))
+ (with-current-buffer (find-file-noselect file)
+ (save-excursion
+ (goto-char (point-max))
+ (if (or (re-search-backward vc-arch-tagline-re (- (point) 1000) t)
+ (progn
+ (goto-char (point-min))
+ (re-search-forward vc-arch-tagline-re (+ (point) 1000) t)))
+ (match-string 1)
+ (concat "./" (file-relative-name file (vc-arch-root file)))))))))
+
+(defun vc-arch-tagging-method (file)
+ (with-current-buffer
+ (find-file-noselect
+ (expand-file-name "{arch}/=tagging-method" (vc-arch-root file)))
+ (save-excursion
+ (goto-char (point-min))
+ (if (re-search-forward
+ "^[ \t]*\\(tagline\\|implicit\\|names\\|explicit\\)" nil t)
+ (intern (match-string 1))
+ 'names))))
+
+(defun vc-arch-root (file)
+ "Return the root directory of an Arch project, if any."
+ (or (vc-file-getprop file 'arch-root)
+ ;; Check the =tagging-method, in case someone naively manually
+ ;; creates a {arch} directory somewhere.
+ (let ((root (vc-find-root file "{arch}/=tagging-method")))
+ (when root
+ (vc-file-setprop
+ file 'arch-root root)))))
+
+(defun vc-arch-find-admin-dir (file)
+ "Return the administrative directory of FILE."
+ (expand-file-name "{arch}" (vc-arch-root file)))
+
+(defun vc-arch-register (files &optional _comment)
+ (dolist (file files)
+ (let ((tagmet (vc-arch-tagging-method file)))
+ (if (and (memq tagmet '(tagline implicit)) comment-start)
+ (with-current-buffer (find-file-noselect file)
+ (if (buffer-modified-p)
+ (error "Save %s first" (buffer-name)))
+ (vc-arch-add-tagline)
+ (save-buffer)))))
+ (vc-arch-command nil 0 files "add"))
+
+(defun vc-arch-registered (file)
+ ;; Don't seriously check whether it's source or not. Checking would
+ ;; require running TLA, so it's better to not do it, so it also works if
+ ;; TLA is not installed.
+ (and (vc-arch-root file)
+ (vc-arch-file-source-p file)))
+
+(defun vc-arch-default-version (file)
+ (or (vc-file-getprop (vc-arch-root file) 'arch-default-version)
+ (let* ((root (vc-arch-root file))
+ (f (expand-file-name "{arch}/++default-version" root)))
+ (if (file-readable-p f)
+ (vc-file-setprop
+ root 'arch-default-version
+ (with-temp-buffer
+ (insert-file-contents f)
+ ;; Strip the terminating newline.
+ (buffer-substring (point-min) (1- (point-max)))))))))
+
+(defun vc-arch-state (file)
+ ;; There's no checkout operation and merging is not done from VC
+ ;; so the only operation that's state dependent that VC supports is commit
+ ;; which is only activated if the file is `edited'.
+ (let* ((root (vc-arch-root file))
+ (ver (vc-arch-default-version file))
+ (pat (concat "\\`" (subst-char-in-string ?/ ?% ver)))
+ (dir (expand-file-name ",,inode-sigs/"
+ (expand-file-name "{arch}" root)))
+ (sigfile nil))
+ (dolist (f (if (file-directory-p dir) (directory-files dir t pat)))
+ (if (or (not sigfile) (file-newer-than-file-p f sigfile))
+ (setq sigfile f)))
+ (if (not sigfile)
+ 'edited ;We know nothing.
+ (let ((id (vc-arch-file-id file)))
+ (setq id (replace-regexp-in-string "[ \t]" "_" id))
+ (with-current-buffer (find-file-noselect sigfile)
+ (goto-char (point-min))
+ (while (and (search-forward id nil 'move)
+ (save-excursion
+ (goto-char (- (match-beginning 0) 2))
+ ;; For `names', the lines start with `?./foo/bar'.
+ ;; For others there's 2 chars before the ./foo/bar.
+ (or (not (or (bolp) (looking-at "\n?")))
+ ;; Ignore E_ entries used for foo.id files.
+ (looking-at "E_")))))
+ (if (eobp)
+ ;; ID not found.
+ (if (equal (file-name-nondirectory sigfile)
+ (subst-char-in-string
+ ?/ ?% (vc-arch-working-revision file)))
+ 'added
+ ;; Might be `added' or `up-to-date' as well.
+ ;; FIXME: Check in the patch logs to find out.
+ 'edited)
+ ;; Found the ID, let's check the inode.
+ (if (not (re-search-forward
+ "\t.*mtime=\\([0-9]+\\):size=\\([0-9]+\\)"
+ (line-end-position) t))
+ ;; Buh? Unexpected format.
+ 'edited
+ (let ((ats (file-attributes file)))
+ (if (and (eq (nth 7 ats) (string-to-number (match-string 2)))
+ (equal (format-time-string "%s" (nth 5 ats))
+ (match-string 1)))
+ 'up-to-date
+ 'edited)))))))))
+
+;; dir-status-files called from vc-dir, which loads vc,
+;; which loads vc-dispatcher.
+(declare-function vc-exec-after "vc-dispatcher" (code))
+
+(defun vc-arch-dir-status-files (dir _files callback)
+ "Run 'tla inventory' for DIR and pass results to CALLBACK.
+CALLBACK expects (ENTRIES &optional MORE-TO-COME); see
+`vc-dir-refresh'."
+ (let ((default-directory dir))
+ (vc-arch-command t 'async nil "changes"))
+ ;; The updating could be done asynchronously.
+ (vc-run-delayed
+ (vc-arch-after-dir-status callback)))
+
+(defun vc-arch-after-dir-status (callback)
+ (let* ((state-map '(("M " . edited)
+ ("Mb" . edited) ;binary
+ ("D " . removed)
+ ("D/" . removed) ;directory
+ ("A " . added)
+ ("A/" . added) ;directory
+ ("=>" . renamed)
+ ("/>" . renamed) ;directory
+ ("lf" . symlink-to-file)
+ ("fl" . file-to-symlink)
+ ("--" . permissions-changed)
+ ("-/" . permissions-changed) ;directory
+ ))
+ (state-map-regexp (regexp-opt (mapcar 'car state-map) t))
+ (entry-regexp (concat "^" state-map-regexp " \\(.*\\)$"))
+ result)
+ (goto-char (point-min))
+ ;;(message "Got %s" (buffer-string))
+ (while (re-search-forward entry-regexp nil t)
+ (let* ((state-string (match-string 1))
+ (state (cdr (assoc state-string state-map)))
+ (filename (match-string 2)))
+ (push (list filename state) result)))
+
+ (funcall callback result nil)))
+
+(defun vc-arch-working-revision (file)
+ (let* ((root (expand-file-name "{arch}" (vc-arch-root file)))
+ (defbranch (vc-arch-default-version file)))
+ (when (and defbranch (string-match "\\`\\(.+@[^/\n]+\\)/\\(\\(\\(.*?\\)\\(?:--.*\\)?\\)--.*\\)\\'" defbranch))
+ (let* ((archive (match-string 1 defbranch))
+ (category (match-string 4 defbranch))
+ (branch (match-string 3 defbranch))
+ (version (match-string 2 defbranch))
+ (sealed nil) (rev-nb 0)
+ (rev nil)
+ logdir tmp)
+ (setq logdir (expand-file-name category root))
+ (setq logdir (expand-file-name branch logdir))
+ (setq logdir (expand-file-name version logdir))
+ (setq logdir (expand-file-name archive logdir))
+ (setq logdir (expand-file-name "patch-log" logdir))
+ (dolist (file (if (file-directory-p logdir) (directory-files logdir)))
+ ;; Revision names go: base-0, patch-N, version-0, versionfix-M.
+ (when (and (eq (aref file 0) ?v) (not sealed))
+ (setq sealed t rev-nb 0))
+ (if (and (string-match "-\\([0-9]+\\)\\'" file)
+ (setq tmp (string-to-number (match-string 1 file)))
+ (or (not sealed) (eq (aref file 0) ?v))
+ (>= tmp rev-nb))
+ (setq rev-nb tmp rev file)))
+ ;; Use "none-000" if the tree hasn't yet been committed on the
+ ;; default branch. We'll then get "Arch:000[branch]" on the mode-line.
+ (concat defbranch "--" (or rev "none-000"))))))
+
+
+(defcustom vc-arch-mode-line-rewrite
+ '(("\\`.*--\\(.*--.*\\)--\\(v?\\).*-\\([0-9]+\\)\\'" . "\\2\\3[\\1]"))
+ "Rewrite rules to shorten Arch's revision names on the mode-line."
+ :type '(repeat (cons regexp string))
+ :group 'vc-arch)
+
+(defun vc-arch-mode-line-string (file)
+ "Return a string for `vc-mode-line' to put in the mode line for FILE."
+ (let ((rev (vc-working-revision file)))
+ (dolist (rule vc-arch-mode-line-rewrite)
+ (if (string-match (car rule) rev)
+ (setq rev (replace-match (cdr rule) t nil rev))))
+ (format "Arch%c%s"
+ (pcase (vc-state file)
+ ((or `up-to-date `needs-update) ?-)
+ (`added ?@)
+ (t ?:))
+ rev)))
+
+(defun vc-arch-diff3-rej-p (rej)
+ (let ((attrs (file-attributes rej)))
+ (and attrs (< (nth 7 attrs) 60)
+ (with-temp-buffer
+ (insert-file-contents rej)
+ (goto-char (point-min))
+ (looking-at "Conflicts occurred, diff3 conflict markers left in file\\.")))))
+
+(defun vc-arch-delete-rej-if-obsolete ()
+ "For use in `after-save-hook'."
+ (save-excursion
+ (let ((rej (concat buffer-file-name ".rej")))
+ (when (and buffer-file-name (vc-arch-diff3-rej-p rej))
+ (unless (re-search-forward "^<<<<<<< " nil t)
+ ;; The .rej file is obsolete.
+ (condition-case nil (delete-file rej) (error nil))
+ ;; Remove the hook so that it is not called multiple times.
+ (remove-hook 'after-save-hook 'vc-arch-delete-rej-if-obsolete t))))))
+
+(defun vc-arch-find-file-hook ()
+ (let ((rej (concat buffer-file-name ".rej")))
+ (when (and buffer-file-name (file-exists-p rej))
+ (if (vc-arch-diff3-rej-p rej)
+ (save-excursion
+ (goto-char (point-min))
+ (if (not (re-search-forward "^<<<<<<< " nil t))
+ ;; The .rej file is obsolete.
+ (condition-case nil (delete-file rej) (error nil))
+ (smerge-mode 1)
+ (add-hook 'after-save-hook
+ 'vc-arch-delete-rej-if-obsolete nil t)
+ (message "There are unresolved conflicts in this file")))
+ (message "There are unresolved conflicts in %s"
+ (file-name-nondirectory rej))))))
+
+(autoload 'vc-switches "vc")
+
+(defun vc-arch-checkin (files comment)
+ ;; FIXME: This implementation probably only works for singleton filesets
+ (let ((summary (file-relative-name (car files) (vc-arch-root (car files)))))
+ ;; Extract a summary from the comment.
+ (when (or (string-match "\\`Summary:[ \t]*\\(.*[^ \t\n]\\)\\([ \t]*\n\\)*" comment)
+ (string-match "\\`[ \t]*\\(.*[^ \t\n]\\)[ \t]*\\(\n?\\'\\|\n\\([ \t]*\n\\)+\\)" comment))
+ (setq summary (match-string 1 comment))
+ (setq comment (substring comment (match-end 0))))
+ (vc-arch-command nil 0 files "commit" "-s" summary "-L" comment "--"
+ (vc-switches 'Arch 'checkin))))
+
+(defun vc-arch-diff (files &optional async oldvers newvers buffer)
+ "Get a difference report using Arch between two versions of FILES."
+ ;; FIXME: This implementation only works for singleton filesets. To make
+ ;; it work for more cases, we have to either call `file-diffs' manually on
+ ;; each and every `file' in the fileset, or use `changes --diffs' (and
+ ;; variants) and maybe filter the output with `filterdiff' to only include
+ ;; the files in which we're interested.
+ (let ((file (car files)))
+ (if (and newvers
+ (vc-up-to-date-p file)
+ (equal newvers (vc-working-revision file)))
+ ;; Newvers is the base revision and the current file is unchanged,
+ ;; so we can diff with the current file.
+ (setq newvers nil))
+ (if newvers
+ (error "Diffing specific revisions not implemented")
+ (let* (process-file-side-effects
+ ;; Run the command from the root dir.
+ (default-directory (vc-arch-root file))
+ (status
+ (vc-arch-command
+ (or buffer "*vc-diff*")
+ (if async 'async 1)
+ nil "file-diffs"
+ (vc-switches 'Arch 'diff)
+ (file-relative-name file)
+ (if (equal oldvers (vc-working-revision file))
+ nil
+ oldvers))))
+ (if async 1 status))))) ; async diff, pessimistic assumption.
+
+(defun vc-arch-delete-file (file)
+ (vc-arch-command nil 0 file "rm"))
+
+(defun vc-arch-rename-file (old new)
+ (vc-arch-command nil 0 new "mv" (file-relative-name old)))
+
+(defalias 'vc-arch-responsible-p 'vc-arch-root)
+
+(defun vc-arch-command (buffer okstatus file &rest flags)
+ "A wrapper around `vc-do-command' for use in vc-arch.el."
+ (apply 'vc-do-command (or buffer "*vc*") okstatus vc-arch-program file flags))
+
+;;; Completion of versions and revisions.
+
+(defun vc-arch--version-completion-table (root string)
+ (delq nil
+ (mapcar
+ (lambda (d)
+ (when (string-match "/\\([^/]+\\)/\\([^/]+\\)\\'" d)
+ (concat (match-string 2 d) "/" (match-string 1 d))))
+ (let ((default-directory root))
+ (file-expand-wildcards
+ (concat "*/*/"
+ (if (string-match "/" string)
+ (concat (substring string (match-end 0))
+ "*/" (substring string 0 (match-beginning 0)))
+ (concat "*/" string))
+ "*"))))))
+
+(defun vc-arch-revision-completion-table (files)
+ (lambda (string pred action)
+ ;; FIXME: complete revision patches as well.
+ (let* ((root (expand-file-name "{arch}" (vc-arch-root (car files))))
+ (table (vc-arch--version-completion-table root string)))
+ (complete-with-action action table string pred))))
+
+;;; Trimming revision libraries.
+
+;; This code is not directly related to VC and there are many variants of
+;; this functionality available as scripts, but I like this version better,
+;; so maybe others will like it too.
+
+(defun vc-arch-trim-find-least-useful-rev (revs)
+ (let* ((first (pop revs))
+ (second (pop revs))
+ (third (pop revs))
+ ;; We try to give more importance to recent revisions. The idea is
+ ;; that it's OK if checking out a revision 1000-patch-old is ten
+ ;; times slower than checking out a revision 100-patch-old. But at
+ ;; the same time a 2-patch-old rev isn't really ten times more
+ ;; important than a 20-patch-old, so we use an arbitrary constant
+ ;; "100" to reduce this effect for recent revisions. Making this
+ ;; constant a float has the side effect of causing the subsequent
+ ;; computations to be done as floats as well.
+ (max (+ 100.0 (car (or (car (last revs)) third))))
+ (cost (lambda () (/ (- (car third) (car first)) (- max (car second)))))
+ (minrev second)
+ (mincost (funcall cost)))
+ (while revs
+ (setq first second)
+ (setq second third)
+ (setq third (pop revs))
+ (when (< (funcall cost) mincost)
+ (setq minrev second)
+ (setq mincost (funcall cost))))
+ minrev))
+
+(defun vc-arch-trim-make-sentinel (revs)
+ (if (null revs) (lambda (_proc _msg) (message "VC-Arch trimming ... done"))
+ (lambda (_proc _msg)
+ (message "VC-Arch trimming %s..." (file-name-nondirectory (car revs)))
+ (rename-file (car revs) (concat (car revs) "*rm*"))
+ (let ((proc (start-process "vc-arch-trim" nil
+ "rm" "-rf" (concat (car revs) "*rm*"))))
+ (set-process-sentinel proc (vc-arch-trim-make-sentinel (cdr revs)))))))
+
+(defun vc-arch-trim-one-revlib (dir)
+ "Delete half of the revisions in the revision library."
+ (interactive "Ddirectory: ")
+ (let ((garbage (directory-files dir 'full "\\`,," 'nosort)))
+ (when garbage
+ (funcall (vc-arch-trim-make-sentinel garbage) nil nil)))
+ (let ((revs
+ (sort (delq nil
+ (mapcar
+ (lambda (f)
+ (when (string-match "-\\([0-9]+\\)\\'" f)
+ (cons (string-to-number (match-string 1 f)) f)))
+ (directory-files dir nil nil 'nosort)))
+ 'car-less-than-car))
+ (subdirs nil))
+ (when (cddr revs)
+ (dotimes (_i (/ (length revs) 2))
+ (let ((minrev (vc-arch-trim-find-least-useful-rev revs)))
+ (setq revs (delq minrev revs))
+ (push minrev subdirs)))
+ (funcall (vc-arch-trim-make-sentinel
+ (mapcar (lambda (x) (expand-file-name (cdr x) dir)) subdirs))
+ nil nil))))
+
+(defun vc-arch-trim-revlib ()
+ "Delete half of the revisions in the revision library."
+ (interactive)
+ (let ((rl-dir (with-output-to-string
+ (call-process vc-arch-program nil standard-output nil
+ "my-revision-library"))))
+ (while (string-match "\\(.*\\)\n" rl-dir)
+ (let ((dir (match-string 1 rl-dir)))
+ (setq rl-dir
+ (if (and (file-directory-p dir) (file-writable-p dir))
+ dir
+ (substring rl-dir (match-end 0))))))
+ (unless (file-writable-p rl-dir)
+ (error "No writable revlib directory found"))
+ (message "Revlib at %s" rl-dir)
+ (let* ((archives (directory-files rl-dir 'full "[^.]\\|..."))
+ (categories
+ (apply 'append
+ (mapcar (lambda (dir)
+ (when (file-directory-p dir)
+ (directory-files dir 'full "[^.]\\|...")))
+ archives)))
+ (branches
+ (apply 'append
+ (mapcar (lambda (dir)
+ (when (file-directory-p dir)
+ (directory-files dir 'full "[^.]\\|...")))
+ categories)))
+ (versions
+ (apply 'append
+ (mapcar (lambda (dir)
+ (when (file-directory-p dir)
+ (directory-files dir 'full "--.*--")))
+ branches))))
+ (mapc 'vc-arch-trim-one-revlib versions))
+ ))
+
+(defvar vc-arch-extra-menu-map
+ (let ((map (make-sparse-keymap)))
+ (define-key map [add-tagline]
+ '(menu-item "Add tagline" vc-arch-add-tagline))
+ map))
+
+(defun vc-arch-extra-menu () vc-arch-extra-menu-map)
+
+
+;;; Less obvious implementations.
+
+(defun vc-arch-find-revision (file rev buffer)
+ (let ((out (make-temp-file "vc-out")))
+ (unwind-protect
+ (progn
+ (with-temp-buffer
+ (vc-arch-command (current-buffer) 1 nil "file-diffs" file rev)
+ (call-process-region (point-min) (point-max)
+ "patch" nil nil nil "-R" "-o" out file))
+ (with-current-buffer buffer
+ (insert-file-contents out)))
+ (delete-file out))))
+
+(provide 'vc-arch)
+
+;;; vc-arch.el ends here
+++ /dev/null
-;;; vc-arch.el --- VC backend for the Arch version-control system -*- lexical-binding: t -*-
-
-;; Copyright (C) 2004-2014 Free Software Foundation, Inc.
-
-;; Author: FSF (see vc.el for full credits)
-;; Maintainer: Stefan Monnier <monnier@gnu.org>
-;; Package: vc
-
-;; 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:
-
-;; The home page of the Arch version control system is at
-;;
-;; http://www.gnuarch.org/
-;;
-;; This is derived from vc-mcvs.el as follows:
-;; - cp vc-mcvs.el vc-arch.el and then M-% mcvs RET arch RET
-;;
-;; Then of course started the hacking.
-;;
-;; What has been partly tested:
-;; - Open a file.
-;; - C-x v = without any prefix arg.
-;; - C-x v v to commit a change to a single file.
-
-;; Bugs:
-
-;; - *vc-log*'s initial content lacks the `Summary:' lines.
-;; - All files under the tree are considered as "under Arch's control"
-;; without regards to =tagging-method and such.
-;; - Files are always considered as `edited'.
-;; - C-x v l does not work.
-;; - C-x v i does not work.
-;; - C-x v ~ does not work.
-;; - C-x v u does not work.
-;; - C-x v s does not work.
-;; - C-x v r does not work.
-;; - VC directory listings do not work.
-;; - And more...
-
-;;; Code:
-
-(eval-when-compile (require 'vc))
-
-;;; Properties of the backend
-
-(defun vc-arch-revision-granularity () 'repository)
-(defun vc-arch-checkout-model (_files) 'implicit)
-
-;;;
-;;; Customization options
-;;;
-
-(defgroup vc-arch nil
- "VC Arch backend."
- :version "24.1"
- :group 'vc)
-
-;; It seems Arch diff does not accept many options, so this is not
-;; very useful. It exists mainly so that the VC backends are all
-;; consistent with regards to their treatment of diff switches.
-(defcustom vc-arch-diff-switches t
- "String or list of strings specifying switches for Arch 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 "23.1"
- :group 'vc-arch)
-
-(define-obsolete-variable-alias 'vc-arch-command 'vc-arch-program "23.1")
-
-(defcustom vc-arch-program
- (let ((candidates '("tla" "baz")))
- (while (and candidates (not (executable-find (car candidates))))
- (setq candidates (cdr candidates)))
- (or (car candidates) "tla"))
- "Name of the Arch executable."
- :type 'string
- :group 'vc-arch)
-
-;; Clear up the cache to force vc-call to check again and discover
-;; new functions when we reload this file.
-(put 'Arch 'vc-functions nil)
-
-;;;###autoload (defun vc-arch-registered (file)
-;;;###autoload (if (vc-find-root file "{arch}/=tagging-method")
-;;;###autoload (progn
-;;;###autoload (load "vc-arch" nil t)
-;;;###autoload (vc-arch-registered file))))
-
-(defun vc-arch-add-tagline ()
- "Add an `arch-tag' to the end of the current file."
- (interactive)
- (comment-normalize-vars)
- (goto-char (point-max))
- (forward-comment -1)
- (skip-chars-forward " \t\n")
- (cond
- ((not (bolp)) (insert "\n\n"))
- ((not (eq ?\n (char-before (1- (point))))) (insert "\n")))
- (let ((beg (point))
- (idfile (and buffer-file-name
- (expand-file-name
- (concat ".arch-ids/"
- (file-name-nondirectory buffer-file-name)
- ".id")
- (file-name-directory buffer-file-name)))))
- (insert "arch-tag: ")
- (if (and idfile (file-exists-p idfile))
- ;; If the file is unreadable, we do want to get an error here.
- (progn
- (insert-file-contents idfile)
- (forward-line 1)
- (delete-file idfile))
- (condition-case nil
- (call-process "uuidgen" nil t)
- (file-error (insert (format "%s <%s> %s"
- (current-time-string)
- user-mail-address
- (+ (nth 2 (current-time))
- (buffer-size)))))))
- (comment-region beg (point))))
-
-(defconst vc-arch-tagline-re "^\\W*arch-tag:[ \t]*\\(.*[^ \t\n]\\)")
-
-(defmacro vc-with-current-file-buffer (file &rest body)
- (declare (indent 2) (debug t))
- `(let ((-kill-buf- nil)
- (-file- ,file))
- (with-current-buffer (or (find-buffer-visiting -file-)
- (setq -kill-buf- (generate-new-buffer " temp")))
- ;; Avoid find-file-literally since it can do many undesirable extra
- ;; things (among which, call us back into an infinite loop).
- (if -kill-buf- (insert-file-contents -file-))
- (unwind-protect
- (progn ,@body)
- (if (buffer-live-p -kill-buf-) (kill-buffer -kill-buf-))))))
-
-(defun vc-arch-file-source-p (file)
- "Can return nil, `maybe' or a non-nil value.
-Only the value `maybe' can be trusted :-(."
- ;; FIXME: Check the tag and name of parent dirs.
- (unless (string-match "\\`[,+]" (file-name-nondirectory file))
- (or (string-match "\\`{arch}/"
- (file-relative-name file (vc-arch-root file)))
- (file-exists-p
- ;; Check the presence of an ID file.
- (expand-file-name
- (concat ".arch-ids/" (file-name-nondirectory file) ".id")
- (file-name-directory file)))
- ;; Check the presence of a tagline.
- (vc-with-current-file-buffer file
- (save-excursion
- (goto-char (point-max))
- (or (re-search-backward vc-arch-tagline-re (- (point) 1000) t)
- (progn
- (goto-char (point-min))
- (re-search-forward vc-arch-tagline-re (+ (point) 1000) t)))))
- ;; FIXME: check =tagging-method to see whether untagged files might
- ;; be source or not.
- (with-current-buffer
- (find-file-noselect (expand-file-name "{arch}/=tagging-method"
- (vc-arch-root file)))
- (let ((untagged-source t)) ;Default is `names'.
- (save-excursion
- (goto-char (point-min))
- (if (re-search-forward "^[ \t]*\\(\\(tagline\\|implicit\\|names\\)\\|explicit\\)" nil t)
- (setq untagged-source (match-end 2)))
- (if (re-search-forward "^[ \t]*untagged-source[ \t]+\\(\\(source\\)\\|precious\\|backup\\|junk\\|unrecognized\\)" nil t)
- (setq untagged-source (match-end 2))))
- (if untagged-source 'maybe))))))
-
-(defun vc-arch-file-id (file)
- ;; Don't include the kind of ID this is because it seems to be too messy.
- (let ((idfile (expand-file-name
- (concat ".arch-ids/" (file-name-nondirectory file) ".id")
- (file-name-directory file))))
- (if (file-exists-p idfile)
- (with-temp-buffer
- (insert-file-contents idfile)
- (looking-at ".*[^ \n\t]")
- (match-string 0))
- (with-current-buffer (find-file-noselect file)
- (save-excursion
- (goto-char (point-max))
- (if (or (re-search-backward vc-arch-tagline-re (- (point) 1000) t)
- (progn
- (goto-char (point-min))
- (re-search-forward vc-arch-tagline-re (+ (point) 1000) t)))
- (match-string 1)
- (concat "./" (file-relative-name file (vc-arch-root file)))))))))
-
-(defun vc-arch-tagging-method (file)
- (with-current-buffer
- (find-file-noselect
- (expand-file-name "{arch}/=tagging-method" (vc-arch-root file)))
- (save-excursion
- (goto-char (point-min))
- (if (re-search-forward
- "^[ \t]*\\(tagline\\|implicit\\|names\\|explicit\\)" nil t)
- (intern (match-string 1))
- 'names))))
-
-(defun vc-arch-root (file)
- "Return the root directory of an Arch project, if any."
- (or (vc-file-getprop file 'arch-root)
- ;; Check the =tagging-method, in case someone naively manually
- ;; creates a {arch} directory somewhere.
- (let ((root (vc-find-root file "{arch}/=tagging-method")))
- (when root
- (vc-file-setprop
- file 'arch-root root)))))
-
-(defun vc-arch-find-admin-dir (file)
- "Return the administrative directory of FILE."
- (expand-file-name "{arch}" (vc-arch-root file)))
-
-(defun vc-arch-register (files &optional _comment)
- (dolist (file files)
- (let ((tagmet (vc-arch-tagging-method file)))
- (if (and (memq tagmet '(tagline implicit)) comment-start)
- (with-current-buffer (find-file-noselect file)
- (if (buffer-modified-p)
- (error "Save %s first" (buffer-name)))
- (vc-arch-add-tagline)
- (save-buffer)))))
- (vc-arch-command nil 0 files "add"))
-
-(defun vc-arch-registered (file)
- ;; Don't seriously check whether it's source or not. Checking would
- ;; require running TLA, so it's better to not do it, so it also works if
- ;; TLA is not installed.
- (and (vc-arch-root file)
- (vc-arch-file-source-p file)))
-
-(defun vc-arch-default-version (file)
- (or (vc-file-getprop (vc-arch-root file) 'arch-default-version)
- (let* ((root (vc-arch-root file))
- (f (expand-file-name "{arch}/++default-version" root)))
- (if (file-readable-p f)
- (vc-file-setprop
- root 'arch-default-version
- (with-temp-buffer
- (insert-file-contents f)
- ;; Strip the terminating newline.
- (buffer-substring (point-min) (1- (point-max)))))))))
-
-(defun vc-arch-state (file)
- ;; There's no checkout operation and merging is not done from VC
- ;; so the only operation that's state dependent that VC supports is commit
- ;; which is only activated if the file is `edited'.
- (let* ((root (vc-arch-root file))
- (ver (vc-arch-default-version file))
- (pat (concat "\\`" (subst-char-in-string ?/ ?% ver)))
- (dir (expand-file-name ",,inode-sigs/"
- (expand-file-name "{arch}" root)))
- (sigfile nil))
- (dolist (f (if (file-directory-p dir) (directory-files dir t pat)))
- (if (or (not sigfile) (file-newer-than-file-p f sigfile))
- (setq sigfile f)))
- (if (not sigfile)
- 'edited ;We know nothing.
- (let ((id (vc-arch-file-id file)))
- (setq id (replace-regexp-in-string "[ \t]" "_" id))
- (with-current-buffer (find-file-noselect sigfile)
- (goto-char (point-min))
- (while (and (search-forward id nil 'move)
- (save-excursion
- (goto-char (- (match-beginning 0) 2))
- ;; For `names', the lines start with `?./foo/bar'.
- ;; For others there's 2 chars before the ./foo/bar.
- (or (not (or (bolp) (looking-at "\n?")))
- ;; Ignore E_ entries used for foo.id files.
- (looking-at "E_")))))
- (if (eobp)
- ;; ID not found.
- (if (equal (file-name-nondirectory sigfile)
- (subst-char-in-string
- ?/ ?% (vc-arch-working-revision file)))
- 'added
- ;; Might be `added' or `up-to-date' as well.
- ;; FIXME: Check in the patch logs to find out.
- 'edited)
- ;; Found the ID, let's check the inode.
- (if (not (re-search-forward
- "\t.*mtime=\\([0-9]+\\):size=\\([0-9]+\\)"
- (line-end-position) t))
- ;; Buh? Unexpected format.
- 'edited
- (let ((ats (file-attributes file)))
- (if (and (eq (nth 7 ats) (string-to-number (match-string 2)))
- (equal (format-time-string "%s" (nth 5 ats))
- (match-string 1)))
- 'up-to-date
- 'edited)))))))))
-
-;; dir-status-files called from vc-dir, which loads vc,
-;; which loads vc-dispatcher.
-(declare-function vc-exec-after "vc-dispatcher" (code))
-
-(defun vc-arch-dir-status-files (dir _files callback)
- "Run 'tla inventory' for DIR and pass results to CALLBACK.
-CALLBACK expects (ENTRIES &optional MORE-TO-COME); see
-`vc-dir-refresh'."
- (let ((default-directory dir))
- (vc-arch-command t 'async nil "changes"))
- ;; The updating could be done asynchronously.
- (vc-run-delayed
- (vc-arch-after-dir-status callback)))
-
-(defun vc-arch-after-dir-status (callback)
- (let* ((state-map '(("M " . edited)
- ("Mb" . edited) ;binary
- ("D " . removed)
- ("D/" . removed) ;directory
- ("A " . added)
- ("A/" . added) ;directory
- ("=>" . renamed)
- ("/>" . renamed) ;directory
- ("lf" . symlink-to-file)
- ("fl" . file-to-symlink)
- ("--" . permissions-changed)
- ("-/" . permissions-changed) ;directory
- ))
- (state-map-regexp (regexp-opt (mapcar 'car state-map) t))
- (entry-regexp (concat "^" state-map-regexp " \\(.*\\)$"))
- result)
- (goto-char (point-min))
- ;;(message "Got %s" (buffer-string))
- (while (re-search-forward entry-regexp nil t)
- (let* ((state-string (match-string 1))
- (state (cdr (assoc state-string state-map)))
- (filename (match-string 2)))
- (push (list filename state) result)))
-
- (funcall callback result nil)))
-
-(defun vc-arch-working-revision (file)
- (let* ((root (expand-file-name "{arch}" (vc-arch-root file)))
- (defbranch (vc-arch-default-version file)))
- (when (and defbranch (string-match "\\`\\(.+@[^/\n]+\\)/\\(\\(\\(.*?\\)\\(?:--.*\\)?\\)--.*\\)\\'" defbranch))
- (let* ((archive (match-string 1 defbranch))
- (category (match-string 4 defbranch))
- (branch (match-string 3 defbranch))
- (version (match-string 2 defbranch))
- (sealed nil) (rev-nb 0)
- (rev nil)
- logdir tmp)
- (setq logdir (expand-file-name category root))
- (setq logdir (expand-file-name branch logdir))
- (setq logdir (expand-file-name version logdir))
- (setq logdir (expand-file-name archive logdir))
- (setq logdir (expand-file-name "patch-log" logdir))
- (dolist (file (if (file-directory-p logdir) (directory-files logdir)))
- ;; Revision names go: base-0, patch-N, version-0, versionfix-M.
- (when (and (eq (aref file 0) ?v) (not sealed))
- (setq sealed t rev-nb 0))
- (if (and (string-match "-\\([0-9]+\\)\\'" file)
- (setq tmp (string-to-number (match-string 1 file)))
- (or (not sealed) (eq (aref file 0) ?v))
- (>= tmp rev-nb))
- (setq rev-nb tmp rev file)))
- ;; Use "none-000" if the tree hasn't yet been committed on the
- ;; default branch. We'll then get "Arch:000[branch]" on the mode-line.
- (concat defbranch "--" (or rev "none-000"))))))
-
-
-(defcustom vc-arch-mode-line-rewrite
- '(("\\`.*--\\(.*--.*\\)--\\(v?\\).*-\\([0-9]+\\)\\'" . "\\2\\3[\\1]"))
- "Rewrite rules to shorten Arch's revision names on the mode-line."
- :type '(repeat (cons regexp string))
- :group 'vc-arch)
-
-(defun vc-arch-mode-line-string (file)
- "Return a string for `vc-mode-line' to put in the mode line for FILE."
- (let ((rev (vc-working-revision file)))
- (dolist (rule vc-arch-mode-line-rewrite)
- (if (string-match (car rule) rev)
- (setq rev (replace-match (cdr rule) t nil rev))))
- (format "Arch%c%s"
- (pcase (vc-state file)
- ((or `up-to-date `needs-update) ?-)
- (`added ?@)
- (t ?:))
- rev)))
-
-(defun vc-arch-diff3-rej-p (rej)
- (let ((attrs (file-attributes rej)))
- (and attrs (< (nth 7 attrs) 60)
- (with-temp-buffer
- (insert-file-contents rej)
- (goto-char (point-min))
- (looking-at "Conflicts occurred, diff3 conflict markers left in file\\.")))))
-
-(defun vc-arch-delete-rej-if-obsolete ()
- "For use in `after-save-hook'."
- (save-excursion
- (let ((rej (concat buffer-file-name ".rej")))
- (when (and buffer-file-name (vc-arch-diff3-rej-p rej))
- (unless (re-search-forward "^<<<<<<< " nil t)
- ;; The .rej file is obsolete.
- (condition-case nil (delete-file rej) (error nil))
- ;; Remove the hook so that it is not called multiple times.
- (remove-hook 'after-save-hook 'vc-arch-delete-rej-if-obsolete t))))))
-
-(defun vc-arch-find-file-hook ()
- (let ((rej (concat buffer-file-name ".rej")))
- (when (and buffer-file-name (file-exists-p rej))
- (if (vc-arch-diff3-rej-p rej)
- (save-excursion
- (goto-char (point-min))
- (if (not (re-search-forward "^<<<<<<< " nil t))
- ;; The .rej file is obsolete.
- (condition-case nil (delete-file rej) (error nil))
- (smerge-mode 1)
- (add-hook 'after-save-hook
- 'vc-arch-delete-rej-if-obsolete nil t)
- (message "There are unresolved conflicts in this file")))
- (message "There are unresolved conflicts in %s"
- (file-name-nondirectory rej))))))
-
-(autoload 'vc-switches "vc")
-
-(defun vc-arch-checkin (files comment)
- ;; FIXME: This implementation probably only works for singleton filesets
- (let ((summary (file-relative-name (car files) (vc-arch-root (car files)))))
- ;; Extract a summary from the comment.
- (when (or (string-match "\\`Summary:[ \t]*\\(.*[^ \t\n]\\)\\([ \t]*\n\\)*" comment)
- (string-match "\\`[ \t]*\\(.*[^ \t\n]\\)[ \t]*\\(\n?\\'\\|\n\\([ \t]*\n\\)+\\)" comment))
- (setq summary (match-string 1 comment))
- (setq comment (substring comment (match-end 0))))
- (vc-arch-command nil 0 files "commit" "-s" summary "-L" comment "--"
- (vc-switches 'Arch 'checkin))))
-
-(defun vc-arch-diff (files &optional async oldvers newvers buffer)
- "Get a difference report using Arch between two versions of FILES."
- ;; FIXME: This implementation only works for singleton filesets. To make
- ;; it work for more cases, we have to either call `file-diffs' manually on
- ;; each and every `file' in the fileset, or use `changes --diffs' (and
- ;; variants) and maybe filter the output with `filterdiff' to only include
- ;; the files in which we're interested.
- (let ((file (car files)))
- (if (and newvers
- (vc-up-to-date-p file)
- (equal newvers (vc-working-revision file)))
- ;; Newvers is the base revision and the current file is unchanged,
- ;; so we can diff with the current file.
- (setq newvers nil))
- (if newvers
- (error "Diffing specific revisions not implemented")
- (let* (process-file-side-effects
- ;; Run the command from the root dir.
- (default-directory (vc-arch-root file))
- (status
- (vc-arch-command
- (or buffer "*vc-diff*")
- (if async 'async 1)
- nil "file-diffs"
- (vc-switches 'Arch 'diff)
- (file-relative-name file)
- (if (equal oldvers (vc-working-revision file))
- nil
- oldvers))))
- (if async 1 status))))) ; async diff, pessimistic assumption.
-
-(defun vc-arch-delete-file (file)
- (vc-arch-command nil 0 file "rm"))
-
-(defun vc-arch-rename-file (old new)
- (vc-arch-command nil 0 new "mv" (file-relative-name old)))
-
-(defalias 'vc-arch-responsible-p 'vc-arch-root)
-
-(defun vc-arch-command (buffer okstatus file &rest flags)
- "A wrapper around `vc-do-command' for use in vc-arch.el."
- (apply 'vc-do-command (or buffer "*vc*") okstatus vc-arch-program file flags))
-
-;;; Completion of versions and revisions.
-
-(defun vc-arch--version-completion-table (root string)
- (delq nil
- (mapcar
- (lambda (d)
- (when (string-match "/\\([^/]+\\)/\\([^/]+\\)\\'" d)
- (concat (match-string 2 d) "/" (match-string 1 d))))
- (let ((default-directory root))
- (file-expand-wildcards
- (concat "*/*/"
- (if (string-match "/" string)
- (concat (substring string (match-end 0))
- "*/" (substring string 0 (match-beginning 0)))
- (concat "*/" string))
- "*"))))))
-
-(defun vc-arch-revision-completion-table (files)
- (lambda (string pred action)
- ;; FIXME: complete revision patches as well.
- (let* ((root (expand-file-name "{arch}" (vc-arch-root (car files))))
- (table (vc-arch--version-completion-table root string)))
- (complete-with-action action table string pred))))
-
-;;; Trimming revision libraries.
-
-;; This code is not directly related to VC and there are many variants of
-;; this functionality available as scripts, but I like this version better,
-;; so maybe others will like it too.
-
-(defun vc-arch-trim-find-least-useful-rev (revs)
- (let* ((first (pop revs))
- (second (pop revs))
- (third (pop revs))
- ;; We try to give more importance to recent revisions. The idea is
- ;; that it's OK if checking out a revision 1000-patch-old is ten
- ;; times slower than checking out a revision 100-patch-old. But at
- ;; the same time a 2-patch-old rev isn't really ten times more
- ;; important than a 20-patch-old, so we use an arbitrary constant
- ;; "100" to reduce this effect for recent revisions. Making this
- ;; constant a float has the side effect of causing the subsequent
- ;; computations to be done as floats as well.
- (max (+ 100.0 (car (or (car (last revs)) third))))
- (cost (lambda () (/ (- (car third) (car first)) (- max (car second)))))
- (minrev second)
- (mincost (funcall cost)))
- (while revs
- (setq first second)
- (setq second third)
- (setq third (pop revs))
- (when (< (funcall cost) mincost)
- (setq minrev second)
- (setq mincost (funcall cost))))
- minrev))
-
-(defun vc-arch-trim-make-sentinel (revs)
- (if (null revs) (lambda (_proc _msg) (message "VC-Arch trimming ... done"))
- (lambda (_proc _msg)
- (message "VC-Arch trimming %s..." (file-name-nondirectory (car revs)))
- (rename-file (car revs) (concat (car revs) "*rm*"))
- (let ((proc (start-process "vc-arch-trim" nil
- "rm" "-rf" (concat (car revs) "*rm*"))))
- (set-process-sentinel proc (vc-arch-trim-make-sentinel (cdr revs)))))))
-
-(defun vc-arch-trim-one-revlib (dir)
- "Delete half of the revisions in the revision library."
- (interactive "Ddirectory: ")
- (let ((garbage (directory-files dir 'full "\\`,," 'nosort)))
- (when garbage
- (funcall (vc-arch-trim-make-sentinel garbage) nil nil)))
- (let ((revs
- (sort (delq nil
- (mapcar
- (lambda (f)
- (when (string-match "-\\([0-9]+\\)\\'" f)
- (cons (string-to-number (match-string 1 f)) f)))
- (directory-files dir nil nil 'nosort)))
- 'car-less-than-car))
- (subdirs nil))
- (when (cddr revs)
- (dotimes (_i (/ (length revs) 2))
- (let ((minrev (vc-arch-trim-find-least-useful-rev revs)))
- (setq revs (delq minrev revs))
- (push minrev subdirs)))
- (funcall (vc-arch-trim-make-sentinel
- (mapcar (lambda (x) (expand-file-name (cdr x) dir)) subdirs))
- nil nil))))
-
-(defun vc-arch-trim-revlib ()
- "Delete half of the revisions in the revision library."
- (interactive)
- (let ((rl-dir (with-output-to-string
- (call-process vc-arch-program nil standard-output nil
- "my-revision-library"))))
- (while (string-match "\\(.*\\)\n" rl-dir)
- (let ((dir (match-string 1 rl-dir)))
- (setq rl-dir
- (if (and (file-directory-p dir) (file-writable-p dir))
- dir
- (substring rl-dir (match-end 0))))))
- (unless (file-writable-p rl-dir)
- (error "No writable revlib directory found"))
- (message "Revlib at %s" rl-dir)
- (let* ((archives (directory-files rl-dir 'full "[^.]\\|..."))
- (categories
- (apply 'append
- (mapcar (lambda (dir)
- (when (file-directory-p dir)
- (directory-files dir 'full "[^.]\\|...")))
- archives)))
- (branches
- (apply 'append
- (mapcar (lambda (dir)
- (when (file-directory-p dir)
- (directory-files dir 'full "[^.]\\|...")))
- categories)))
- (versions
- (apply 'append
- (mapcar (lambda (dir)
- (when (file-directory-p dir)
- (directory-files dir 'full "--.*--")))
- branches))))
- (mapc 'vc-arch-trim-one-revlib versions))
- ))
-
-(defvar vc-arch-extra-menu-map
- (let ((map (make-sparse-keymap)))
- (define-key map [add-tagline]
- '(menu-item "Add tagline" vc-arch-add-tagline))
- map))
-
-(defun vc-arch-extra-menu () vc-arch-extra-menu-map)
-
-
-;;; Less obvious implementations.
-
-(defun vc-arch-find-revision (file rev buffer)
- (let ((out (make-temp-file "vc-out")))
- (unwind-protect
- (progn
- (with-temp-buffer
- (vc-arch-command (current-buffer) 1 nil "file-diffs" file rev)
- (call-process-region (point-min) (point-max)
- "patch" nil nil nil "-R" "-o" out file))
- (with-current-buffer buffer
- (insert-file-contents out)))
- (delete-file out))))
-
-(provide 'vc-arch)
-
-;;; vc-arch.el ends here
:type 'regexp
:group 'vc)
-(defcustom vc-handled-backends '(RCS CVS SVN SCCS SRC Bzr Git Hg Mtn Arch)
+(defcustom vc-handled-backends '(RCS CVS SVN SCCS SRC Bzr Git Hg Mtn)
;; RCS, CVS, SVN, SCCS, and SRC come first because they are per-dir
;; rather than per-tree. RCS comes first because of the multibackend
;; support intended to use RCS for local commits (with a remote CVS server).
:group 'vc)
;; Note: we don't actually have a darcs back end yet.
-;; Also, Meta-CVS (corresponding to MCVS) is unsupported.
+;; Also, Meta-CVS (corresponding to MCVS) and Arch are unsupported.
+;; The Arch back end will be retrieved and fixed if it is ever required.
(defcustom vc-directory-exclusion-list (purecopy '("SCCS" "RCS" "CVS" "MCVS"
".src" ".svn" ".git" ".hg" ".bzr"
"_MTN" "_darcs" "{arch}"))
projects / emacs.git / commitdiff