lisp/vc-mtn.el

   1 ;;; vc-mtn.el --- VC backend for Monotone
   2
   3 ;; Copyright (C) 2007, 2008  Free Software Foundation, Inc.
   4
   5 ;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
   6 ;; Keywords:
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;;
  26
  27 ;;; TODO:
  28
  29 ;; - The `previous-version' VC method needs to be supported, 'D' in
  30 ;;   log-view-mode uses it.
  31
  32 ;;; Code:
  33
  34 (eval-when-compile (require 'cl) (require 'vc))
  35
  36 (defcustom vc-mtn-diff-switches t
  37   "String or list of strings specifying switches for monotone diff under VC.
  38 If nil, use the value of `vc-diff-switches'.  If t, use no switches."
  39   :type '(choice (const :tag "Unspecified" nil)
  40                  (const :tag "None" t)
  41                  (string :tag "Argument String")
  42                  (repeat :tag "Argument List" :value ("") string))
  43   :version "23.1"
  44   :group 'vc)
  45
  46 (define-obsolete-variable-alias 'vc-mtn-command 'vc-mtn-program "23.1")
  47 (defcustom vc-mtn-program "mtn"
  48   "Name of the monotone executable."
  49   :type 'string
  50   :group 'vc)
  51
  52 ;; Clear up the cache to force vc-call to check again and discover
  53 ;; new functions when we reload this file.
  54 (put 'Mtn 'vc-functions nil)
  55
  56 (unless (executable-find vc-mtn-program)
  57   ;; vc-mtn.el is 100% non-functional without the `mtn' executable.
  58   (setq vc-handled-backends (delq 'Mtn vc-handled-backends)))
  59
  60 ;;;###autoload
  61 (defconst vc-mtn-admin-dir "_MTN")
  62 ;;;###autoload
  63 (defconst vc-mtn-admin-format (concat vc-mtn-admin-dir "/format"))
  64
  65 ;;;###autoload (defun vc-mtn-registered (file)
  66 ;;;###autoload   (if (vc-find-root file vc-mtn-admin-format)
  67 ;;;###autoload       (progn
  68 ;;;###autoload         (load "vc-mtn")
  69 ;;;###autoload         (vc-mtn-registered file))))
  70
  71 (defun vc-mtn-revision-granularity () 'repository)
  72 (defun vc-mtn-checkout-model (files) 'implicit)
  73
  74 (defun vc-mtn-root (file)
  75   (setq file (if (file-directory-p file)
  76                  (file-name-as-directory file)
  77                (file-name-directory file)))
  78   (or (vc-file-getprop file 'vc-mtn-root)
  79       (vc-file-setprop file 'vc-mtn-root
  80                        (vc-find-root file vc-mtn-admin-format))))
  81
  82
  83 (defun vc-mtn-registered (file)
  84   (let ((root (vc-mtn-root file)))
  85     (when root
  86       (vc-mtn-state file))))
  87
  88 (defun vc-mtn-command (buffer okstatus files &rest flags)
  89   "A wrapper around `vc-do-command' for use in vc-mtn.el."
  90   (let ((process-environment
  91          ;; Avoid localization of messages so we can parse the output.
  92          (cons "LC_MESSAGES=C" process-environment)))
  93     (apply 'vc-do-command (or buffer "*vc*") okstatus vc-mtn-program
  94            files flags)))
  95
  96 (defun vc-mtn-state (file)
  97   ;; If `mtn' fails or returns status>0, or if the search files, just
  98   ;; return nil.
  99   (ignore-errors
 100     (with-temp-buffer
 101       (vc-mtn-command t 0 file "status")
 102       (goto-char (point-min))
 103       (re-search-forward
 104        "^  \\(?:\\(patched\\)\\|\\(added\\) \\(?:.*\\)\\)\\|no changes$")
 105       (cond  ((match-end 1) 'edited)
 106              ((match-end 2) 'added)
 107              (t 'up-to-date)))))
 108
 109 (defun vc-mtn-working-revision (file)
 110   ;; If `mtn' fails or returns status>0, or if the search fails, just
 111   ;; return nil.
 112   (ignore-errors
 113     (with-temp-buffer
 114       (vc-mtn-command t 0 file "status")
 115       (goto-char (point-min))
 116       (re-search-forward "Current branch: \\(.*\\)\nChanges against parent \\(.*\\)")
 117       (match-string 2))))
 118
 119 (defun vc-mtn-workfile-branch (file)
 120   ;; If `mtn' fails or returns status>0, or if the search files, just
 121   ;; return nil.
 122   (ignore-errors
 123     (with-temp-buffer
 124       (vc-mtn-command t 0 file "status")
 125       (goto-char (point-min))
 126       (re-search-forward "Current branch: \\(.*\\)\nChanges against parent \\(.*\\)")
 127       (match-string 1))))
 128
 129 (defun vc-mtn-workfile-unchanged-p (file)
 130   (not (eq (vc-mtn-state file) 'edited)))
 131
 132 ;; Mode-line rewrite code copied from vc-arch.el.
 133
 134 (defcustom vc-mtn-mode-line-rewrite
 135   '(("\\`[^:/#]*[:/#]" . ""))           ;Drop the host part.
 136   "Rewrite rules to shorten Mtn's revision names on the mode-line."
 137   :type '(repeat (cons regexp string))
 138   :version "22.2"
 139   :group 'vc)
 140
 141 (defun vc-mtn-mode-line-string (file)
 142   "Return string for placement in modeline by `vc-mode-line' for FILE."
 143   (let ((branch (vc-mtn-workfile-branch file)))
 144     (dolist (rule vc-mtn-mode-line-rewrite)
 145       (if (string-match (car rule) branch)
 146           (setq branch (replace-match (cdr rule) t nil branch))))
 147     (format "Mtn%c%s"
 148             (case (vc-state file)
 149               ((up-to-date needs-update) ?-)
 150               (added ?@)
 151               (t ?:))
 152             branch)))
 153
 154 (defun vc-mtn-register (files &optional rest)
 155   (vc-mtn-command nil 0 files "add"))
 156
 157 (defun vc-mtn-responsible-p (file) (vc-mtn-root file))
 158 (defun vc-mtn-could-register (file) (vc-mtn-root file))
 159
 160 (defun vc-mtn-checkin (files rev comment)
 161   (vc-mtn-command nil 0 files "commit" "-m" comment))
 162
 163 (defun vc-mtn-find-revision (file rev buffer)
 164   (vc-mtn-command buffer 0 file "cat" "-r" rev))
 165
 166 ;; (defun vc-mtn-checkout (file &optional editable rev)
 167 ;;   )
 168
 169 (defun vc-mtn-revert (file &optional contents-done)
 170   (unless contents-done
 171     (vc-mtn-command nil 0 file "revert")))
 172
 173 ;; (defun vc-mtn-roolback (files)
 174 ;;   )
 175
 176 (defun vc-mtn-print-log (files &optional buffer)
 177   (vc-mtn-command buffer 0 files "log"))
 178
 179 (defvar log-view-message-re)
 180 (defvar log-view-file-re)
 181 (defvar log-view-font-lock-keywords)
 182 (defvar log-view-per-file-logs)
 183
 184 (define-derived-mode vc-mtn-log-view-mode log-view-mode "Mtn-Log-View"
 185   ;; Don't match anything.
 186   (set (make-local-variable 'log-view-file-re) "\\`a\\`")
 187   (set (make-local-variable 'log-view-per-file-logs) nil)
 188   ;; TODO: Use a more precise regexp than "[ |/]+" to avoid false positives
 189   ;; in the ChangeLog text.
 190   (set (make-local-variable 'log-view-message-re)
 191        "^[ |/]+Revision: \\([0-9a-f]+\\)")
 192   (require 'add-log)                    ;For change-log faces.
 193   (set (make-local-variable 'log-view-font-lock-keywords)
 194        (append log-view-font-lock-keywords
 195                '(("^[ |]+Author: \\(.*\\)" (1 'change-log-email))
 196                  ("^[ |]+Date: \\(.*\\)" (1 'change-log-date-face))))))
 197
 198 ;; (defun vc-mtn-show-log-entry (revision)
 199 ;;   )
 200
 201 (defun vc-mtn-diff (files &optional rev1 rev2 buffer)
 202   "Get a difference report using monotone between two revisions of FILES."
 203   (apply 'vc-mtn-command (or buffer "*vc-diff*") 1 files "diff"
 204          (append
 205            (vc-switches 'mtn 'diff)
 206            (if rev1 (list "-r" rev1)) (if rev2 (list "-r" rev2)))))
 207
 208 (defun vc-mtn-annotate-command (file buf &optional rev)
 209   (apply 'vc-mtn-command buf 0 file "annotate"
 210          (if rev (list "-r" rev))))
 211
 212 (declare-function vc-annotate-convert-time "vc-annotate" (time))
 213
 214 (defconst vc-mtn-annotate-full-re
 215   "^ *\\([0-9a-f]+\\)\\.* by [^ ]+ \\([0-9]+\\)-\\([0-9]+\\)-\\([0-9]+\\): ")
 216 (defconst vc-mtn-annotate-any-re
 217   (concat "^\\(?: +: \\|" vc-mtn-annotate-full-re "\\)"))
 218
 219 (defun vc-mtn-annotate-time ()
 220   (when (looking-at vc-mtn-annotate-any-re)
 221     (goto-char (match-end 0))
 222     (let ((year (match-string 2)))
 223       (if (not year)
 224           ;; Look for the date on a previous line.
 225           (save-excursion
 226             (get-text-property (1- (previous-single-property-change
 227                                     (point) 'vc-mtn-time nil (point-min)))
 228                                'vc-mtn-time))
 229         (let ((time (vc-annotate-convert-time
 230                      (encode-time 0 0 0
 231                                   (string-to-number (match-string 4))
 232                                   (string-to-number (match-string 3))
 233                                   (string-to-number year)
 234                                   t))))
 235           (let ((inhibit-read-only t)
 236                 (inhibit-modification-hooks t))
 237             (put-text-property (match-beginning 0) (match-end 0)
 238                                'vc-mtn-time time))
 239           time)))))
 240
 241 (defun vc-mtn-annotate-extract-revision-at-line ()
 242   (save-excursion
 243     (when (or (looking-at vc-mtn-annotate-full-re)
 244               (re-search-backward vc-mtn-annotate-full-re nil t))
 245       (match-string 1))))
 246
 247 ;;; Revision completion.
 248
 249 (defun vc-mtn-list-tags ()
 250   (with-temp-buffer
 251     (vc-mtn-command t 0 nil "list" "tags")
 252     (goto-char (point-min))
 253     (let ((tags ()))
 254       (while (re-search-forward "^[^ ]+" nil t)
 255         (push (match-string 0) tags))
 256       tags)))
 257
 258 (defun vc-mtn-list-branches ()
 259   (with-temp-buffer
 260     (vc-mtn-command t 0 nil "list" "branches")
 261     (goto-char (point-min))
 262     (let ((branches ()))
 263       (while (re-search-forward "^.+" nil t)
 264         (push (match-string 0) branches))
 265       branches)))
 266
 267 (defun vc-mtn-list-revision-ids (prefix)
 268   (with-temp-buffer
 269     (vc-mtn-command t 0 nil "complete" "revision" prefix)
 270     (goto-char (point-min))
 271     (let ((ids ()))
 272       (while (re-search-forward "^.+" nil t)
 273         (push (match-string 0) ids))
 274       ids)))
 275
 276 (defun vc-mtn-revision-completion-table (files)
 277   ;; TODO: Implement completion for for selectors
 278   ;; TODO: Implement completion for composite selectors.
 279   (lexical-let ((files files))
 280     ;; What about using `files'?!?  --Stef
 281     (lambda (string pred action)
 282       (cond
 283        ;; "Tag" selectors.
 284        ((string-match "\\`t:" string)
 285         (complete-with-action action
 286                               (mapcar (lambda (tag) (concat "t:" tag))
 287                                       (vc-mtn-list-tags))
 288                               string pred))
 289        ;; "Branch" selectors.
 290        ((string-match "\\`b:" string)
 291         (complete-with-action action
 292                               (mapcar (lambda (tag) (concat "b:" tag))
 293                                       (vc-mtn-list-branches))
 294                               string pred))
 295        ;; "Head" selectors.  Not sure how they differ from "branch" selectors.
 296        ((string-match "\\`h:" string)
 297         (complete-with-action action
 298                               (mapcar (lambda (tag) (concat "h:" tag))
 299                                       (vc-mtn-list-branches))
 300                               string pred))
 301        ;; "ID" selectors.
 302        ((string-match "\\`i:" string)
 303         (complete-with-action action
 304                               (mapcar (lambda (tag) (concat "i:" tag))
 305                                       (vc-mtn-list-revision-ids
 306                                        (substring string (match-end 0))))
 307                               string pred))
 308        (t
 309         (complete-with-action action
 310                               '("t:" "b:" "h:" "i:"
 311                                 ;; Completion not implemented for these.
 312                                 "a:" "c:" "d:" "e:" "l:")
 313                               string pred))))))
 314
 315
 316
 317 (provide 'vc-mtn)
 318
 319 ;; arch-tag: 2b89ffbc-cbb8-405a-9080-2eafd4becb70
 320 ;;; vc-mtn.el ends here