lisp/org-attach.el

   1 ;;; org-attach.el --- Manage file attachments to org-mode tasks
   2
   3 ;; Copyright (C) 2008-2012  Free Software Foundation, Inc.
   4
   5 ;; Author: John Wiegley <johnw@newartisans.com>
   6 ;; Keywords: org data task
   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 ;; See the Org-mode manual for information on how to use it.
  26 ;;
  27 ;; Attachments are managed in a special directory called "data", which
  28 ;; lives in the same directory as the org file itself.  If this data
  29 ;; directory is initialized as a Git repository, then org-attach will
  30 ;; automatically commit changes when it sees them.
  31 ;;
  32 ;; Attachment directories are identified using a UUID generated for the
  33 ;; task which has the attachments.  These are added as property to the
  34 ;; task when necessary, and should not be deleted or changed by the
  35 ;; user, ever.  UUIDs are generated by a mechanism defined in the variable
  36 ;; `org-id-method'.
  37
  38 ;;; Code:
  39
  40 (eval-when-compile
  41   (require 'cl))
  42 (require 'org-id)
  43 (require 'org)
  44
  45 (defgroup org-attach nil
  46   "Options concerning entry attachments in Org-mode."
  47   :tag "Org Attach"
  48   :group 'org)
  49
  50 (defcustom org-attach-directory "data/"
  51   "The directory where attachments are stored.
  52 If this is a relative path, it will be interpreted relative to the directory
  53 where the Org file lives."
  54   :group 'org-attach
  55   :type 'directory)
  56
  57 (defcustom org-attach-git-annex-cutoff (* 32 1024)
  58   "If non-nil, files larger than this will be annexed instead of stored."
  59   :group 'org-attach
  60   :type '(choice
  61           (const :tag "None" nil)
  62           (integer :tag "Bytes")))
  63
  64 (defcustom org-attach-auto-tag "ATTACH"
  65   "Tag that will be triggered automatically when an entry has an attachment."
  66   :group 'org-attach
  67   :type '(choice
  68           (const :tag "None" nil)
  69           (string :tag "Tag")))
  70
  71 (defcustom org-attach-file-list-property "Attachments"
  72   "The property used to keep a list of attachment belonging to this entry.
  73 This is not really needed, so you may set this to nil if you don't want it.
  74 Also, for entries where children inherit the directory, the list of
  75 attachments is not kept in this property."
  76   :group 'org-attach
  77   :type '(choice
  78           (const :tag "None" nil)
  79           (string :tag "Tag")))
  80
  81 (defcustom org-attach-method 'cp
  82   "The preferred method to attach a file.
  83 Allowed values are:
  84
  85 mv    rename the file to move it into the attachment directory
  86 cp    copy the file
  87 ln    create a hard link.  Note that this is not supported
  88       on all systems, and then the result is not defined.
  89 lns   create a symbol link.  Note that this is not supported
  90       on all systems, and then the result is not defined."
  91   :group 'org-attach
  92   :type '(choice
  93           (const :tag "Copy" cp)
  94           (const :tag "Move/Rename" mv)
  95           (const :tag "Hard Link" ln)
  96           (const :tag "Symbol Link" lns)))
  97
  98 (defcustom org-attach-expert nil
  99   "Non-nil means do not show the splash buffer with the attach dispatcher."
 100   :group 'org-attach
 101   :type 'boolean)
 102
 103 (defcustom org-attach-allow-inheritance t
 104   "Non-nil means allow attachment directories be inherited."
 105   :group 'org-attach
 106   :type 'boolean)
 107
 108 (defvar org-attach-inherited nil
 109   "Indicates if the last access to the attachment directory was inherited.")
 110
 111 (defcustom org-attach-store-link-p nil
 112   "Non-nil means store a link to a file when attaching it."
 113   :group 'org-attach
 114   :version "24.1"
 115   :type '(choice
 116           (const :tag "Don't store link" nil)
 117           (const :tag "Link to origin location" t)
 118           (const :tag "Link to the attach-dir location" attached)))
 119
 120 ;;;###autoload
 121 (defun org-attach ()
 122   "The dispatcher for attachment commands.
 123 Shows a list of commands and prompts for another key to execute a command."
 124   (interactive)
 125   (let (c marker)
 126     (when (eq major-mode 'org-agenda-mode)
 127       (setq marker (or (get-text-property (point) 'org-hd-marker)
 128                        (get-text-property (point) 'org-marker)))
 129       (unless marker
 130         (error "No task in current line")))
 131     (save-excursion
 132       (when marker
 133         (set-buffer (marker-buffer marker))
 134         (goto-char marker))
 135       (org-back-to-heading t)
 136       (save-excursion
 137         (save-window-excursion
 138           (unless org-attach-expert
 139             (with-output-to-temp-buffer "*Org Attach*"
 140               (princ "Select an Attachment Command:
 141
 142 a       Select a file and attach it to the task, using `org-attach-method'.
 143 c/m/l/y Attach a file using copy/move/link/symbolic-link method.
 144 n       Create a new attachment, as an Emacs buffer.
 145 z       Synchronize the current task with its attachment
 146         directory, in case you added attachments yourself.
 147
 148 o       Open current task's attachments.
 149 O       Like \"o\", but force opening in Emacs.
 150 f       Open current task's attachment directory.
 151 F       Like \"f\", but force using dired in Emacs.
 152
 153 d       Delete one attachment, you will be prompted for a file name.
 154 D       Delete all of a task's attachments.  A safer way is
 155         to open the directory in dired and delete from there.
 156
 157 s       Set a specific attachment directory for this entry.
 158 i       Make children of the current entry inherit its attachment directory.")))
 159           (org-fit-window-to-buffer (get-buffer-window "*Org Attach*"))
 160           (message "Select command: [acmlzoOfFdD]")
 161           (setq c (read-char-exclusive))
 162           (and (get-buffer "*Org Attach*") (kill-buffer "*Org Attach*"))))
 163       (cond
 164        ((memq c '(?a ?\C-a)) (call-interactively 'org-attach-attach))
 165        ((memq c '(?c ?\C-c))
 166         (let ((org-attach-method 'cp)) (call-interactively 'org-attach-attach)))
 167        ((memq c '(?m ?\C-m))
 168         (let ((org-attach-method 'mv)) (call-interactively 'org-attach-attach)))
 169        ((memq c '(?l ?\C-l))
 170         (let ((org-attach-method 'ln)) (call-interactively 'org-attach-attach)))
 171        ((memq c '(?y ?\C-y))
 172         (let ((org-attach-method 'lns)) (call-interactively 'org-attach-attach)))
 173        ((memq c '(?n ?\C-n)) (call-interactively 'org-attach-new))
 174        ((memq c '(?z ?\C-z)) (call-interactively 'org-attach-sync))
 175        ((memq c '(?o ?\C-o)) (call-interactively 'org-attach-open))
 176        ((eq c ?O)            (call-interactively 'org-attach-open-in-emacs))
 177        ((memq c '(?f ?\C-f)) (call-interactively 'org-attach-reveal))
 178        ((memq c '(?F))       (call-interactively 'org-attach-reveal-in-emacs))
 179        ((memq c '(?d ?\C-d)) (call-interactively
 180                               'org-attach-delete-one))
 181        ((eq c ?D)            (call-interactively 'org-attach-delete-all))
 182        ((eq c ?q)            (message "Abort"))
 183        ((memq c '(?s ?\C-s)) (call-interactively
 184                               'org-attach-set-directory))
 185        ((memq c '(?i ?\C-i)) (call-interactively
 186                               'org-attach-set-inherit))
 187        (t (error "No such attachment command %c" c))))))
 188
 189 (defun org-attach-dir (&optional create-if-not-exists-p)
 190   "Return the directory associated with the current entry.
 191 This first checks for a local property ATTACH_DIR, and then for an inherited
 192 property ATTACH_DIR_INHERIT.  If neither exists, the default mechanism
 193 using the entry ID will be invoked to access the unique directory for the
 194 current entry.
 195 If the directory does not exist and CREATE-IF-NOT-EXISTS-P is non-nil,
 196 the directory and (if necessary) the corresponding ID will be created."
 197   (let (attach-dir uuid inherit)
 198     (setq org-attach-inherited (org-entry-get nil "ATTACH_DIR_INHERIT"))
 199     (cond
 200      ((setq attach-dir (org-entry-get nil "ATTACH_DIR"))
 201       (org-attach-check-absolute-path attach-dir))
 202      ((and org-attach-allow-inheritance
 203            (setq inherit (org-entry-get nil "ATTACH_DIR_INHERIT" t)))
 204       (setq attach-dir
 205             (save-excursion
 206               (save-restriction
 207                 (widen)
 208                 (goto-char org-entry-property-inherited-from)
 209                 (let (org-attach-allow-inheritance)
 210                   (org-attach-dir create-if-not-exists-p)))))
 211       (org-attach-check-absolute-path attach-dir)
 212       (setq org-attach-inherited t))
 213      (t ; use the ID
 214       (org-attach-check-absolute-path nil)
 215       (setq uuid (org-id-get (point) create-if-not-exists-p))
 216       (when (or uuid create-if-not-exists-p)
 217         (unless uuid (error "ID retrieval/creation failed"))
 218         (setq attach-dir (expand-file-name
 219                           (format "%s/%s"
 220                                   (substring uuid 0 2)
 221                                   (substring uuid 2))
 222                           (expand-file-name org-attach-directory))))))
 223     (when attach-dir
 224       (if (and create-if-not-exists-p
 225                (not (file-directory-p attach-dir)))
 226           (make-directory attach-dir t))
 227       (and (file-exists-p attach-dir)
 228            attach-dir))))
 229
 230 (defun org-attach-check-absolute-path (dir)
 231   "Check if we have enough information to root the attachment directory.
 232 When DIR is given, check also if it is already absolute.  Otherwise,
 233 assume that it will be relative, and check if `org-attach-directory' is
 234 absolute, or if at least the current buffer has a file name.
 235 Throw an error if we cannot root the directory."
 236   (or (and dir (file-name-absolute-p dir))
 237       (file-name-absolute-p org-attach-directory)
 238       (buffer-file-name (buffer-base-buffer))
 239       (error "Need absolute `org-attach-directory' to attach in buffers without filename")))
 240
 241 (defun org-attach-set-directory ()
 242   "Set the ATTACH_DIR property of the current entry.
 243 The property defines the directory that is used for attachments
 244 of the entry."
 245   (interactive)
 246   (let ((dir (org-entry-get nil "ATTACH_DIR")))
 247     (setq dir (read-directory-name "Attachment directory: " dir))
 248     (org-entry-put nil "ATTACH_DIR" dir)))
 249
 250 (defun org-attach-set-inherit ()
 251   "Set the ATTACH_DIR_INHERIT property of the current entry.
 252 The property defines the directory that is used for attachments
 253 of the entry and any children that do not explicitly define (by setting
 254 the ATTACH_DIR property) their own attachment directory."
 255   (interactive)
 256   (org-entry-put nil "ATTACH_DIR_INHERIT" "t")
 257   (message "Children will inherit attachment directory"))
 258
 259 (defun org-attach-commit ()
 260   "Commit changes to git if `org-attach-directory' is properly initialized.
 261 This checks for the existence of a \".git\" directory in that directory."
 262   (let ((dir (expand-file-name org-attach-directory))
 263         (changes 0))
 264     (when (file-exists-p (expand-file-name ".git" dir))
 265       (with-temp-buffer
 266         (cd dir)
 267         (let ((have-annex
 268                (and org-attach-git-annex-cutoff
 269                     (file-exists-p (expand-file-name ".git/annex" dir)))))
 270           (dolist (new-or-modified
 271                    (split-string
 272                     (shell-command-to-string
 273                      "git ls-files -zmo --exclude-standard") "\0" t))
 274             (if (and have-annex
 275                      (>= (nth 7 (file-attributes new-or-modified))
 276                          org-attach-git-annex-cutoff))
 277                 (call-process "git" nil nil nil "annex" "add" new-or-modified)
 278               (call-process "git" nil nil nil "add" new-or-modified))
 279             (incf changes)))
 280         (dolist (deleted
 281                  (split-string
 282                   (shell-command-to-string "git ls-files -z --deleted") "\0" t))
 283           (call-process "git" nil nil nil "rm" deleted)
 284           (incf changes))
 285         (when (> changes 0)
 286           (shell-command "git commit -m 'Synchronized attachments'"))))))
 287
 288 (defun org-attach-tag (&optional off)
 289   "Turn the autotag on or (if OFF is set) off."
 290   (when org-attach-auto-tag
 291     (save-excursion
 292       (org-back-to-heading t)
 293       (org-toggle-tag org-attach-auto-tag (if off 'off 'on)))))
 294
 295 (defun org-attach-untag ()
 296   "Turn the autotag off."
 297   (org-attach-tag 'off))
 298
 299 (defun org-attach-store-link (file)
 300   "Add a link to `org-stored-link' when attaching a file.
 301 Only do this when `org-attach-store-link-p' is non-nil."
 302   (setq org-stored-links
 303         (cons (list (org-attach-expand-link file)
 304                     (file-name-nondirectory file))
 305               org-stored-links)))
 306
 307 (defun org-attach-attach (file &optional visit-dir method)
 308   "Move/copy/link FILE into the attachment directory of the current task.
 309 If VISIT-DIR is non-nil, visit the directory with dired.
 310 METHOD may be `cp', `mv', `ln', or `lns' default taken from
 311 `org-attach-method'."
 312   (interactive "fFile to keep as an attachment: \nP")
 313   (setq method (or method org-attach-method))
 314   (let ((basename (file-name-nondirectory file)))
 315     (when (and org-attach-file-list-property (not org-attach-inherited))
 316       (org-entry-add-to-multivalued-property
 317        (point) org-attach-file-list-property basename))
 318     (let* ((attach-dir (org-attach-dir t))
 319            (fname (expand-file-name basename attach-dir)))
 320       (cond
 321        ((eq method 'mv) (rename-file file fname))
 322        ((eq method 'cp) (copy-file file fname))
 323        ((eq method 'ln) (add-name-to-file file fname))
 324        ((eq method 'lns) (make-symbolic-link file fname)))
 325       (org-attach-commit)
 326       (org-attach-tag)
 327       (cond ((eq org-attach-store-link-p 'attached)
 328              (org-attach-store-link fname))
 329             ((eq org-attach-store-link-p t)
 330              (org-attach-store-link file)))
 331       (if visit-dir
 332           (dired attach-dir)
 333         (message "File \"%s\" is now a task attachment." basename)))))
 334
 335 (defun org-attach-attach-cp ()
 336   "Attach a file by copying it."
 337   (interactive)
 338   (let ((org-attach-method 'cp)) (call-interactively 'org-attach-attach)))
 339 (defun org-attach-attach-mv ()
 340   "Attach a file by moving (renaming) it."
 341   (interactive)
 342   (let ((org-attach-method 'mv)) (call-interactively 'org-attach-attach)))
 343 (defun org-attach-attach-ln ()
 344   "Attach a file by creating a hard link to it.
 345 Beware that this does not work on systems that do not support hard links.
 346 On some systems, this apparently does copy the file instead."
 347   (interactive)
 348   (let ((org-attach-method 'ln)) (call-interactively 'org-attach-attach)))
 349 (defun org-attach-attach-lns ()
 350   "Attach a file by creating a symbolic link to it.
 351
 352 Beware that this does not work on systems that do not support symbolic links.
 353 On some systems, this apparently does copy the file instead."
 354   (interactive)
 355   (let ((org-attach-method 'lns)) (call-interactively 'org-attach-attach)))
 356
 357 (defun org-attach-new (file)
 358   "Create a new attachment FILE for the current task.
 359 The attachment is created as an Emacs buffer."
 360   (interactive "sCreate attachment named: ")
 361   (when (and org-attach-file-list-property (not org-attach-inherited))
 362     (org-entry-add-to-multivalued-property
 363      (point) org-attach-file-list-property file))
 364   (let ((attach-dir (org-attach-dir t)))
 365     (org-attach-tag)
 366     (find-file (expand-file-name file attach-dir))
 367     (message "New attachment %s" file)))
 368
 369 (defun org-attach-delete-one (&optional file)
 370   "Delete a single attachment."
 371   (interactive)
 372   (let* ((attach-dir (org-attach-dir t))
 373          (files (org-attach-file-list attach-dir))
 374          (file (or file
 375                    (org-icompleting-read
 376                     "Delete attachment: "
 377                     (mapcar (lambda (f)
 378                               (list (file-name-nondirectory f)))
 379                             files)))))
 380     (setq file (expand-file-name file attach-dir))
 381     (unless (file-exists-p file)
 382       (error "No such attachment: %s" file))
 383     (delete-file file)
 384     (org-attach-commit)))
 385
 386 (defun org-attach-delete-all (&optional force)
 387   "Delete all attachments from the current task.
 388 This actually deletes the entire attachment directory.
 389 A safer way is to open the directory in dired and delete from there."
 390   (interactive "P")
 391   (when (and org-attach-file-list-property (not org-attach-inherited))
 392     (org-entry-delete (point) org-attach-file-list-property))
 393   (let ((attach-dir (org-attach-dir)))
 394     (when
 395         (and attach-dir
 396              (or force
 397                  (y-or-n-p "Are you sure you want to remove all attachments of this entry? ")))
 398       (shell-command (format "rm -fr %s" attach-dir))
 399       (message "Attachment directory removed")
 400       (org-attach-commit)
 401       (org-attach-untag))))
 402
 403 (defun org-attach-sync ()
 404   "Synchronize the current tasks with its attachments.
 405 This can be used after files have been added externally."
 406   (interactive)
 407   (org-attach-commit)
 408   (when (and org-attach-file-list-property (not org-attach-inherited))
 409     (org-entry-delete (point) org-attach-file-list-property))
 410   (let ((attach-dir (org-attach-dir)))
 411     (when attach-dir
 412       (let ((files (org-attach-file-list attach-dir)))
 413         (and files (org-attach-tag))
 414         (when org-attach-file-list-property
 415           (dolist (file files)
 416             (unless (string-match "^\\." file)
 417               (org-entry-add-to-multivalued-property
 418                (point) org-attach-file-list-property file))))))))
 419
 420 (defun org-attach-file-list (dir)
 421   "Return a list of files in the attachment directory.
 422 This ignores files starting with a \".\", and files ending in \"~\"."
 423   (delq nil
 424         (mapcar (lambda (x) (if (string-match "^\\." x) nil x))
 425                 (directory-files dir nil "[^~]\\'"))))
 426
 427 (defun org-attach-reveal (&optional if-exists)
 428   "Show the attachment directory of the current task in dired."
 429   (interactive "P")
 430   (let ((attach-dir (org-attach-dir (not if-exists))))
 431     (and attach-dir (org-open-file attach-dir))))
 432
 433 (defun org-attach-reveal-in-emacs ()
 434   "Show the attachment directory of the current task.
 435 This will attempt to use an external program to show the directory."
 436   (interactive)
 437   (let ((attach-dir (org-attach-dir t)))
 438     (dired attach-dir)))
 439
 440 (defun org-attach-open (&optional in-emacs)
 441   "Open an attachment of the current task.
 442 If there are more than one attachment, you will be prompted for the file name.
 443 This command will open the file using the settings in `org-file-apps'
 444 and in the system-specific variants of this variable.
 445 If IN-EMACS is non-nil, force opening in Emacs."
 446   (interactive "P")
 447   (let* ((attach-dir (org-attach-dir t))
 448          (files (org-attach-file-list attach-dir))
 449          (file (if (= (length files) 1)
 450                    (car files)
 451                  (org-icompleting-read "Open attachment: "
 452                                        (mapcar 'list files) nil t))))
 453     (org-open-file (expand-file-name file attach-dir) in-emacs)))
 454
 455 (defun org-attach-open-in-emacs ()
 456   "Open attachment, force opening in Emacs.
 457 See `org-attach-open'."
 458   (interactive)
 459   (org-attach-open 'in-emacs))
 460
 461 (defun org-attach-expand (file)
 462   "Return the full path to the current entry's attachment file FILE.
 463 Basically, this adds the path to the attachment directory."
 464   (expand-file-name file (org-attach-dir)))
 465
 466 (defun org-attach-expand-link (file)
 467   "Return a file link pointing to the current entry's attachment file FILE.
 468 Basically, this adds the path to the attachment directory, and a \"file:\"
 469 prefix."
 470   (concat "file:" (org-attach-expand file)))
 471
 472 (provide 'org-attach)
 473
 474 ;; Local variables:
 475 ;; generated-autoload-file: "org-loaddefs.el"
 476 ;; End:
 477
 478 ;;; org-attach.el ends here