lisp/org/org-attach.el

   1 ;;; org-attach.el --- Manage file attachments to org-mode tasks
   2
   3 ;; Copyright (C) 2008-2014 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 (declare-function vc-git-root "vc-git" (file))
  46
  47 (defgroup org-attach nil
  48   "Options concerning entry attachments in Org-mode."
  49   :tag "Org Attach"
  50   :group 'org)
  51
  52 (defcustom org-attach-directory "data/"
  53   "The directory where attachments are stored.
  54 If this is a relative path, it will be interpreted relative to the directory
  55 where the Org file lives."
  56   :group 'org-attach
  57   :type 'directory)
  58
  59 (defcustom org-attach-git-annex-cutoff (* 32 1024)
  60   "If non-nil, files larger than this will be annexed instead of stored."
  61   :group 'org-attach
  62   :version "24.4"
  63   :package-version '(Org . "8.0")
  64   :type '(choice
  65           (const :tag "None" nil)
  66           (integer :tag "Bytes")))
  67
  68 (defcustom org-attach-auto-tag "ATTACH"
  69   "Tag that will be triggered automatically when an entry has an attachment."
  70   :group 'org-attach
  71   :type '(choice
  72           (const :tag "None" nil)
  73           (string :tag "Tag")))
  74
  75 (defcustom org-attach-file-list-property "Attachments"
  76   "The property used to keep a list of attachment belonging to this entry.
  77 This is not really needed, so you may set this to nil if you don't want it.
  78 Also, for entries where children inherit the directory, the list of
  79 attachments is not kept in this property."
  80   :group 'org-attach
  81   :type '(choice
  82           (const :tag "None" nil)
  83           (string :tag "Tag")))
  84
  85 (defcustom org-attach-method 'cp
  86   "The preferred method to attach a file.
  87 Allowed values are:
  88
  89 mv    rename the file to move it into the attachment directory
  90 cp    copy the file
  91 ln    create a hard link.  Note that this is not supported
  92       on all systems, and then the result is not defined.
  93 lns   create a symbol link.  Note that this is not supported
  94       on all systems, and then the result is not defined."
  95   :group 'org-attach
  96   :type '(choice
  97           (const :tag "Copy" cp)
  98           (const :tag "Move/Rename" mv)
  99           (const :tag "Hard Link" ln)
 100           (const :tag "Symbol Link" lns)))
 101
 102 (defcustom org-attach-expert nil
 103   "Non-nil means do not show the splash buffer with the attach dispatcher."
 104   :group 'org-attach
 105   :type 'boolean)
 106
 107 (defcustom org-attach-allow-inheritance t
 108   "Non-nil means allow attachment directories be inherited."
 109   :group 'org-attach
 110   :type 'boolean)
 111
 112 (defvar org-attach-inherited nil
 113   "Indicates if the last access to the attachment directory was inherited.")
 114
 115 (defcustom org-attach-store-link-p nil
 116   "Non-nil means store a link to a file when attaching it."
 117   :group 'org-attach
 118   :version "24.1"
 119   :type '(choice
 120           (const :tag "Don't store link" nil)
 121           (const :tag "Link to origin location" t)
 122           (const :tag "Link to the attach-dir location" attached)))
 123
 124 ;;;###autoload
 125 (defun org-attach ()
 126   "The dispatcher for attachment commands.
 127 Shows a list of commands and prompts for another key to execute a command."
 128   (interactive)
 129   (let (c marker)
 130     (when (eq major-mode 'org-agenda-mode)
 131       (setq marker (or (get-text-property (point) 'org-hd-marker)
 132                        (get-text-property (point) 'org-marker)))
 133       (unless marker
 134         (error "No task in current line")))
 135     (save-excursion
 136       (when marker
 137         (set-buffer (marker-buffer marker))
 138         (goto-char marker))
 139       (org-back-to-heading t)
 140       (save-excursion
 141         (save-window-excursion
 142           (unless org-attach-expert
 143             (with-output-to-temp-buffer "*Org Attach*"
 144               (princ "Select an Attachment Command:
 145
 146 a       Select a file and attach it to the task, using `org-attach-method'.
 147 c/m/l/y Attach a file using copy/move/link/symbolic-link method.
 148 n       Create a new attachment, as an Emacs buffer.
 149 z       Synchronize the current task with its attachment
 150         directory, in case you added attachments yourself.
 151
 152 o       Open current task's attachments.
 153 O       Like \"o\", but force opening in Emacs.
 154 f       Open current task's attachment directory.
 155 F       Like \"f\", but force using dired in Emacs.
 156
 157 d       Delete one attachment, you will be prompted for a file name.
 158 D       Delete all of a task's attachments.  A safer way is
 159         to open the directory in dired and delete from there.
 160
 161 s       Set a specific attachment directory for this entry.
 162 i       Make children of the current entry inherit its attachment directory.")))
 163           (org-fit-window-to-buffer (get-buffer-window "*Org Attach*"))
 164           (message "Select command: [acmlzoOfFdD]")
 165           (setq c (read-char-exclusive))
 166           (and (get-buffer "*Org Attach*") (kill-buffer "*Org Attach*"))))
 167       (cond
 168        ((memq c '(?a ?\C-a)) (call-interactively 'org-attach-attach))
 169        ((memq c '(?c ?\C-c))
 170         (let ((org-attach-method 'cp)) (call-interactively 'org-attach-attach)))
 171        ((memq c '(?m ?\C-m))
 172         (let ((org-attach-method 'mv)) (call-interactively 'org-attach-attach)))
 173        ((memq c '(?l ?\C-l))
 174         (let ((org-attach-method 'ln)) (call-interactively 'org-attach-attach)))
 175        ((memq c '(?y ?\C-y))
 176         (let ((org-attach-method 'lns)) (call-interactively 'org-attach-attach)))
 177        ((memq c '(?n ?\C-n)) (call-interactively 'org-attach-new))
 178        ((memq c '(?z ?\C-z)) (call-interactively 'org-attach-sync))
 179        ((memq c '(?o ?\C-o)) (call-interactively 'org-attach-open))
 180        ((eq c ?O)            (call-interactively 'org-attach-open-in-emacs))
 181        ((memq c '(?f ?\C-f)) (call-interactively 'org-attach-reveal))
 182        ((memq c '(?F))       (call-interactively 'org-attach-reveal-in-emacs))
 183        ((memq c '(?d ?\C-d)) (call-interactively
 184                               'org-attach-delete-one))
 185        ((eq c ?D)            (call-interactively 'org-attach-delete-all))
 186        ((eq c ?q)            (message "Abort"))
 187        ((memq c '(?s ?\C-s)) (call-interactively
 188                               'org-attach-set-directory))
 189        ((memq c '(?i ?\C-i)) (call-interactively
 190                               'org-attach-set-inherit))
 191        (t (error "No such attachment command %c" c))))))
 192
 193 (defun org-attach-dir (&optional create-if-not-exists-p)
 194   "Return the directory associated with the current entry.
 195 This first checks for a local property ATTACH_DIR, and then for an inherited
 196 property ATTACH_DIR_INHERIT.  If neither exists, the default mechanism
 197 using the entry ID will be invoked to access the unique directory for the
 198 current entry.
 199 If the directory does not exist and CREATE-IF-NOT-EXISTS-P is non-nil,
 200 the directory and (if necessary) the corresponding ID will be created."
 201   (let (attach-dir uuid inherit)
 202     (setq org-attach-inherited (org-entry-get nil "ATTACH_DIR_INHERIT"))
 203     (cond
 204      ((setq attach-dir (org-entry-get nil "ATTACH_DIR"))
 205       (org-attach-check-absolute-path attach-dir))
 206      ((and org-attach-allow-inheritance
 207            (setq inherit (org-entry-get nil "ATTACH_DIR_INHERIT" t)))
 208       (setq attach-dir
 209             (save-excursion
 210               (save-restriction
 211                 (widen)
 212                 (goto-char org-entry-property-inherited-from)
 213                 (let (org-attach-allow-inheritance)
 214                   (org-attach-dir create-if-not-exists-p)))))
 215       (org-attach-check-absolute-path attach-dir)
 216       (setq org-attach-inherited t))
 217      (t ; use the ID
 218       (org-attach-check-absolute-path nil)
 219       (setq uuid (org-id-get (point) create-if-not-exists-p))
 220       (when (or uuid create-if-not-exists-p)
 221         (unless uuid (error "ID retrieval/creation failed"))
 222         (setq attach-dir (expand-file-name
 223                           (format "%s/%s"
 224                                   (substring uuid 0 2)
 225                                   (substring uuid 2))
 226                           (expand-file-name org-attach-directory))))))
 227     (when attach-dir
 228       (if (and create-if-not-exists-p
 229                (not (file-directory-p attach-dir)))
 230           (make-directory attach-dir t))
 231       (and (file-exists-p attach-dir)
 232            attach-dir))))
 233
 234 (defun org-attach-check-absolute-path (dir)
 235   "Check if we have enough information to root the attachment directory.
 236 When DIR is given, check also if it is already absolute.  Otherwise,
 237 assume that it will be relative, and check if `org-attach-directory' is
 238 absolute, or if at least the current buffer has a file name.
 239 Throw an error if we cannot root the directory."
 240   (or (and dir (file-name-absolute-p dir))
 241       (file-name-absolute-p org-attach-directory)
 242       (buffer-file-name (buffer-base-buffer))
 243       (error "Need absolute `org-attach-directory' to attach in buffers without filename")))
 244
 245 (defun org-attach-set-directory ()
 246   "Set the ATTACH_DIR property of the current entry.
 247 The property defines the directory that is used for attachments
 248 of the entry."
 249   (interactive)
 250   (let ((dir (org-entry-get nil "ATTACH_DIR")))
 251     (setq dir (read-directory-name "Attachment directory: " dir))
 252     (org-entry-put nil "ATTACH_DIR" dir)))
 253
 254 (defun org-attach-set-inherit ()
 255   "Set the ATTACH_DIR_INHERIT property of the current entry.
 256 The property defines the directory that is used for attachments
 257 of the entry and any children that do not explicitly define (by setting
 258 the ATTACH_DIR property) their own attachment directory."
 259   (interactive)
 260   (org-entry-put nil "ATTACH_DIR_INHERIT" "t")
 261   (message "Children will inherit attachment directory"))
 262
 263 (defun org-attach-commit ()
 264   "Commit changes to git if `org-attach-directory' is properly initialized.
 265 This checks for the existence of a \".git\" directory in that directory."
 266   (let* ((dir (expand-file-name org-attach-directory))
 267          (git-dir (vc-git-root dir))
 268          (changes 0))
 269     (when git-dir
 270       (with-temp-buffer
 271         (cd dir)
 272         (let ((have-annex
 273                (and org-attach-git-annex-cutoff
 274                     (file-exists-p (expand-file-name "annex" git-dir)))))
 275           (dolist (new-or-modified
 276                    (split-string
 277                     (shell-command-to-string
 278                      "git ls-files -zmo --exclude-standard") "\0" t))
 279             (if (and have-annex
 280                      (>= (nth 7 (file-attributes new-or-modified))
 281                          org-attach-git-annex-cutoff))
 282                 (call-process "git" nil nil nil "annex" "add" new-or-modified)
 283               (call-process "git" nil nil nil "add" new-or-modified))
 284             (incf changes)))
 285         (dolist (deleted
 286                  (split-string
 287                   (shell-command-to-string "git ls-files -z --deleted") "\0" t))
 288           (call-process "git" nil nil nil "rm" deleted)
 289           (incf changes))
 290         (when (> changes 0)
 291           (shell-command "git commit -m 'Synchronized attachments'"))))))
 292
 293 (defun org-attach-tag (&optional off)
 294   "Turn the autotag on or (if OFF is set) off."
 295   (when org-attach-auto-tag
 296     (save-excursion
 297       (org-back-to-heading t)
 298       (org-toggle-tag org-attach-auto-tag (if off 'off 'on)))))
 299
 300 (defun org-attach-untag ()
 301   "Turn the autotag off."
 302   (org-attach-tag 'off))
 303
 304 (defun org-attach-store-link (file)
 305   "Add a link to `org-stored-link' when attaching a file.
 306 Only do this when `org-attach-store-link-p' is non-nil."
 307   (setq org-stored-links
 308         (cons (list (org-attach-expand-link file)
 309                     (file-name-nondirectory file))
 310               org-stored-links)))
 311
 312 (defun org-attach-attach (file &optional visit-dir method)
 313   "Move/copy/link FILE into the attachment directory of the current task.
 314 If VISIT-DIR is non-nil, visit the directory with dired.
 315 METHOD may be `cp', `mv', `ln', or `lns' default taken from
 316 `org-attach-method'."
 317   (interactive "fFile to keep as an attachment: \nP")
 318   (setq method (or method org-attach-method))
 319   (let ((basename (file-name-nondirectory file)))
 320     (when (and org-attach-file-list-property (not org-attach-inherited))
 321       (org-entry-add-to-multivalued-property
 322        (point) org-attach-file-list-property basename))
 323     (let* ((attach-dir (org-attach-dir t))
 324            (fname (expand-file-name basename attach-dir)))
 325       (cond
 326        ((eq method 'mv) (rename-file file fname))
 327        ((eq method 'cp) (copy-file file fname))
 328        ((eq method 'ln) (add-name-to-file file fname))
 329        ((eq method 'lns) (make-symbolic-link file fname)))
 330       (org-attach-commit)
 331       (org-attach-tag)
 332       (cond ((eq org-attach-store-link-p 'attached)
 333              (org-attach-store-link fname))
 334             ((eq org-attach-store-link-p t)
 335              (org-attach-store-link file)))
 336       (if visit-dir
 337           (dired attach-dir)
 338         (message "File \"%s\" is now a task attachment." basename)))))
 339
 340 (defun org-attach-attach-cp ()
 341   "Attach a file by copying it."
 342   (interactive)
 343   (let ((org-attach-method 'cp)) (call-interactively 'org-attach-attach)))
 344 (defun org-attach-attach-mv ()
 345   "Attach a file by moving (renaming) it."
 346   (interactive)
 347   (let ((org-attach-method 'mv)) (call-interactively 'org-attach-attach)))
 348 (defun org-attach-attach-ln ()
 349   "Attach a file by creating a hard link to it.
 350 Beware that this does not work on systems that do not support hard links.
 351 On some systems, this apparently does copy the file instead."
 352   (interactive)
 353   (let ((org-attach-method 'ln)) (call-interactively 'org-attach-attach)))
 354 (defun org-attach-attach-lns ()
 355   "Attach a file by creating a symbolic link to it.
 356
 357 Beware that this does not work on systems that do not support symbolic links.
 358 On some systems, this apparently does copy the file instead."
 359   (interactive)
 360   (let ((org-attach-method 'lns)) (call-interactively 'org-attach-attach)))
 361
 362 (defun org-attach-new (file)
 363   "Create a new attachment FILE for the current task.
 364 The attachment is created as an Emacs buffer."
 365   (interactive "sCreate attachment named: ")
 366   (when (and org-attach-file-list-property (not org-attach-inherited))
 367     (org-entry-add-to-multivalued-property
 368      (point) org-attach-file-list-property file))
 369   (let ((attach-dir (org-attach-dir t)))
 370     (org-attach-tag)
 371     (find-file (expand-file-name file attach-dir))
 372     (message "New attachment %s" file)))
 373
 374 (defun org-attach-delete-one (&optional file)
 375   "Delete a single attachment."
 376   (interactive)
 377   (let* ((attach-dir (org-attach-dir t))
 378          (files (org-attach-file-list attach-dir))
 379          (file (or file
 380                    (org-icompleting-read
 381                     "Delete attachment: "
 382                     (mapcar (lambda (f)
 383                               (list (file-name-nondirectory f)))
 384                             files)))))
 385     (setq file (expand-file-name file attach-dir))
 386     (unless (file-exists-p file)
 387       (error "No such attachment: %s" file))
 388     (delete-file file)
 389     (org-attach-commit)))
 390
 391 (defun org-attach-delete-all (&optional force)
 392   "Delete all attachments from the current task.
 393 This actually deletes the entire attachment directory.
 394 A safer way is to open the directory in dired and delete from there."
 395   (interactive "P")
 396   (when (and org-attach-file-list-property (not org-attach-inherited))
 397     (org-entry-delete (point) org-attach-file-list-property))
 398   (let ((attach-dir (org-attach-dir)))
 399     (when
 400         (and attach-dir
 401              (or force
 402                  (y-or-n-p "Are you sure you want to remove all attachments of this entry? ")))
 403       (shell-command (format "rm -fr %s" attach-dir))
 404       (message "Attachment directory removed")
 405       (org-attach-commit)
 406       (org-attach-untag))))
 407
 408 (defun org-attach-sync ()
 409   "Synchronize the current tasks with its attachments.
 410 This can be used after files have been added externally."
 411   (interactive)
 412   (org-attach-commit)
 413   (when (and org-attach-file-list-property (not org-attach-inherited))
 414     (org-entry-delete (point) org-attach-file-list-property))
 415   (let ((attach-dir (org-attach-dir)))
 416     (when attach-dir
 417       (let ((files (org-attach-file-list attach-dir)))
 418         (and files (org-attach-tag))
 419         (when org-attach-file-list-property
 420           (dolist (file files)
 421             (unless (string-match "^\\." file)
 422               (org-entry-add-to-multivalued-property
 423                (point) org-attach-file-list-property file))))))))
 424
 425 (defun org-attach-file-list (dir)
 426   "Return a list of files in the attachment directory.
 427 This ignores files starting with a \".\", and files ending in \"~\"."
 428   (delq nil
 429         (mapcar (lambda (x) (if (string-match "^\\." x) nil x))
 430                 (directory-files dir nil "[^~]\\'"))))
 431
 432 (defun org-attach-reveal (&optional if-exists)
 433   "Show the attachment directory of the current task.
 434 This will attempt to use an external program to show the directory."
 435   (interactive "P")
 436   (let ((attach-dir (org-attach-dir (not if-exists))))
 437     (and attach-dir (org-open-file attach-dir))))
 438
 439 (defun org-attach-reveal-in-emacs ()
 440   "Show the attachment directory of the current task in dired."
 441   (interactive)
 442   (let ((attach-dir (org-attach-dir t)))
 443     (dired attach-dir)))
 444
 445 (defun org-attach-open (&optional in-emacs)
 446   "Open an attachment of the current task.
 447 If there are more than one attachment, you will be prompted for the file name.
 448 This command will open the file using the settings in `org-file-apps'
 449 and in the system-specific variants of this variable.
 450 If IN-EMACS is non-nil, force opening in Emacs."
 451   (interactive "P")
 452   (let* ((attach-dir (org-attach-dir t))
 453          (files (org-attach-file-list attach-dir))
 454          (file (if (= (length files) 1)
 455                    (car files)
 456                  (org-icompleting-read "Open attachment: "
 457                                        (mapcar 'list files) nil t))))
 458     (org-open-file (expand-file-name file attach-dir) in-emacs)))
 459
 460 (defun org-attach-open-in-emacs ()
 461   "Open attachment, force opening in Emacs.
 462 See `org-attach-open'."
 463   (interactive)
 464   (org-attach-open 'in-emacs))
 465
 466 (defun org-attach-expand (file)
 467   "Return the full path to the current entry's attachment file FILE.
 468 Basically, this adds the path to the attachment directory."
 469   (expand-file-name file (org-attach-dir)))
 470
 471 (defun org-attach-expand-link (file)
 472   "Return a file link pointing to the current entry's attachment file FILE.
 473 Basically, this adds the path to the attachment directory, and a \"file:\"
 474 prefix."
 475   (concat "file:" (org-attach-expand file)))
 476
 477 (provide 'org-attach)
 478
 479 ;; Local variables:
 480 ;; generated-autoload-file: "org-loaddefs.el"
 481 ;; End:
 482
 483 ;;; org-attach.el ends here