lisp/org-attach.el

   1 ;;; org-attach.el --- Manage file attachments to org-mode tasks
   2
   3 ;; Copyright (C) 2008, 2009 Free Software Foundation, Inc.
   4
   5 ;; Author: John Wiegley <johnw@newartisans.com>
   6 ;; Keywords: org data task
   7 ;; Version: 6.30trans
   8
   9 ;; This file is part of GNU Emacs.
  10 ;;
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;; See the Org-mode manual for information on how to use it.
  27 ;;
  28 ;; Attachments are managed in a special directory called "data", which
  29 ;; lives in the same directory as the org file itself.  If this data
  30 ;; directory is initialized as a Git repository, then org-attach will
  31 ;; automatically commit changes when it sees them.
  32 ;;
  33 ;; Attachment directories are identified using a UUID generated for the
  34 ;; task which has the attachments.  These are added as property to the
  35 ;; task when necessary, and should not be deleted or changed by the
  36 ;; user, ever.  UUIDs are generated by a mechanism defined in the variable
  37 ;; `org-id-method'.
  38
  39 ;;; Code:
  40
  41 (eval-when-compile
  42   (require 'cl))
  43 (require 'org-id)
  44 (require 'org)
  45
  46 (defgroup org-attach nil
  47   "Options concerning entry attachments in Org-mode."
  48   :tag "Org Attach"
  49   :group 'org)
  50
  51 (defcustom org-attach-directory "data/"
  52   "The directory where attachments are stored.
  53 If this is a relative path, it will be interpreted relative to the directory
  54 where the Org file lives."
  55   :group 'org-attach
  56   :type 'directory)
  57
  58 (defcustom org-attach-auto-tag "ATTACH"
  59   "Tag that will be triggered automatically when an entry has an attachment."
  60   :group 'org-attach
  61   :type '(choice
  62           (const :tag "None" nil)
  63           (string :tag "Tag")))
  64
  65 (defcustom org-attach-file-list-property "Attachments"
  66   "The property used to keep a list of attachment belonging to this entry.
  67 This is not really needed, so you may set this to nil if you don't want it.
  68 Also, for entries where children inherit the directory, the list of
  69 attachments is not kept in this property."
  70   :group 'org-attach
  71   :type '(choice
  72           (const :tag "None" nil)
  73           (string :tag "Tag")))
  74
  75 (defcustom org-attach-method 'cp
  76   "The preferred method to attach a file.
  77 Allowed values are:
  78
  79 mv    rename the file to move it into the attachment directory
  80 cp    copy the file
  81 ln    create a hard link.  Note that this is not supported
  82       on all systems, and then the result is not defined."
  83   :group 'org-attach
  84   :type '(choice
  85           (const :tag "Copy" cp)
  86           (const :tag "Move/Rename" mv)
  87           (const :tag "Link" ln)))
  88
  89 (defcustom org-attach-expert nil
  90   "Non-nil means do not show the splash buffer with the attach dispatcher."
  91   :group 'org-attach
  92   :type 'boolean)
  93
  94 (defcustom org-attach-allow-inheritance t
  95   "Non-nil means, allow attachment directories be inherited."
  96   :group 'org-attach
  97   :type 'boolean)
  98
  99
 100 (defvar org-attach-inherited nil
 101   "Indicates if the last access to the attachment directory was inherited.")
 102
 103 ;;;###autoload
 104 (defun org-attach ()
 105   "The dispatcher for attachment commands.
 106 Shows a list of commands and prompts for another key to execute a command."
 107   (interactive)
 108   (let (c marker)
 109     (when (eq major-mode 'org-agenda-mode)
 110       (setq marker (or (get-text-property (point) 'org-hd-marker)
 111                        (get-text-property (point) 'org-marker)))
 112       (unless marker
 113         (error "No task in current line")))
 114     (save-excursion
 115       (when marker
 116         (set-buffer (marker-buffer marker))
 117         (goto-char marker))
 118       (org-back-to-heading t)
 119       (save-excursion
 120         (save-window-excursion
 121           (unless org-attach-expert
 122             (with-output-to-temp-buffer "*Org Attach*"
 123               (princ "Select an Attachment Command:
 124
 125 a       Select a file and attach it to the task, using `org-attach-method'.
 126 c/m/l   Attach a file using copy/move/link method.
 127 n       Create a new attachment, as an Emacs buffer.
 128 z       Synchronize the current task with its attachment
 129         directory, in case you added attachments yourself.
 130
 131 o       Open current task's attachments.
 132 O       Like \"o\", but force opening in Emacs.
 133 f       Open current task's attachment directory.
 134 F       Like \"f\", but force using dired in Emacs.
 135
 136 d       Delete one attachment, you will be prompted for a file name.
 137 D       Delete all of a task's attachments.  A safer way is
 138         to open the directory in dired and delete from there.
 139
 140 s       Set a specific attachment directory for this entry.
 141 i       Make children of the current entry inherit its attachment directory.")))
 142           (org-fit-window-to-buffer (get-buffer-window "*Org Attach*"))
 143           (message "Select command: [acmlzoOfFdD]")
 144           (setq c (read-char-exclusive))
 145           (and (get-buffer "*Org Attach*") (kill-buffer "*Org Attach*"))))
 146       (cond
 147        ((memq c '(?a ?\C-a)) (call-interactively 'org-attach-attach))
 148        ((memq c '(?c ?\C-c))
 149         (let ((org-attach-method 'cp)) (call-interactively 'org-attach-attach)))
 150        ((memq c '(?m ?\C-m))
 151         (let ((org-attach-method 'mv)) (call-interactively 'org-attach-attach)))
 152        ((memq c '(?l ?\C-l))
 153         (let ((org-attach-method 'ln)) (call-interactively 'org-attach-attach)))
 154        ((memq c '(?n ?\C-n)) (call-interactively 'org-attach-new))
 155        ((memq c '(?z ?\C-z)) (call-interactively 'org-attach-sync))
 156        ((memq c '(?o ?\C-o)) (call-interactively 'org-attach-open))
 157        ((eq c ?O)            (call-interactively 'org-attach-open-in-emacs))
 158        ((memq c '(?f ?\C-f)) (call-interactively 'org-attach-reveal))
 159        ((memq c '(?F))       (call-interactively 'org-attach-reveal-in-emacs))
 160        ((memq c '(?d ?\C-d)) (call-interactively
 161                               'org-attach-delete-one))
 162        ((eq c ?D)            (call-interactively 'org-attach-delete-all))
 163        ((eq c ?q)            (message "Abort"))
 164        ((memq c '(?s ?\C-s)) (call-interactively
 165                               'org-attach-set-directory))
 166        ((memq c '(?i ?\C-i)) (call-interactively
 167                               'org-attach-set-inherit))
 168        (t (error "No such attachment command %c" c))))))
 169
 170 (defun org-attach-dir (&optional create-if-not-exists-p)
 171   "Return the directory associated with the current entry.
 172 This first checks for a local property ATTACH_DIR, and then for an inherited
 173 property ATTACH_DIR_INHERIT.  If neither exists, the default mechanism
 174 using the entry ID will be invoked to access the unique directory for the
 175 current entry.
 176 If the directory does not exist and CREATE-IF-NOT-EXISTS-P is non-nil,
 177 the directory and (if necessary) the corresponding ID will be created."
 178   (let (attach-dir uuid inherit)
 179     (setq org-attach-inherited (org-entry-get nil "ATTACH_DIR_INHERIT"))
 180     (cond
 181      ((setq attach-dir (org-entry-get nil "ATTACH_DIR"))
 182       (org-attach-check-absolute-path attach-dir))
 183      ((and org-attach-allow-inheritance
 184            (setq inherit (org-entry-get nil "ATTACH_DIR_INHERIT" t)))
 185       (setq attach-dir
 186             (save-excursion
 187               (save-restriction
 188                 (widen)
 189                 (goto-char org-entry-property-inherited-from)
 190                 (let (org-attach-allow-inheritance)
 191                   (org-attach-dir create-if-not-exists-p)))))
 192       (org-attach-check-absolute-path attach-dir)
 193       (setq org-attach-inherited t))
 194      (t ; use the ID
 195       (org-attach-check-absolute-path nil)
 196       (setq uuid (org-id-get (point) create-if-not-exists-p))
 197       (when (or uuid create-if-not-exists-p)
 198         (unless uuid (error "ID retrieval/creation failed"))
 199         (setq attach-dir (expand-file-name
 200                           (format "%s/%s"
 201                                   (substring uuid 0 2)
 202                                   (substring uuid 2))
 203                           (expand-file-name org-attach-directory))))))
 204     (when attach-dir
 205       (if (and create-if-not-exists-p
 206                (not (file-directory-p attach-dir)))
 207           (make-directory attach-dir t))
 208       (and (file-exists-p attach-dir)
 209            attach-dir))))
 210
 211 (defun org-attach-check-absolute-path (dir)
 212   "Check if we have enough information to root the atachment directory.
 213 When DIR is given, check also if it is already absolute.  Otherwise,
 214 assume that it will be relative, and check if `org-attach-directory' is
 215 absolute, or if at least the current buffer has a file name.
 216 Throw an error if we cannot root the directory."
 217   (or (and dir (file-name-absolute-p dir))
 218       (file-name-absolute-p org-attach-directory)
 219       (buffer-file-name (buffer-base-buffer))
 220       (error "Need absolute `org-attach-directory' to attach in buffers without filename.")))
 221
 222 (defun org-attach-set-directory ()
 223   "Set the ATTACH_DIR property of the current entry.
 224 The property defines the directory that is used for attachments
 225 of the entry."
 226   (interactive)
 227   (let ((dir (org-entry-get nil "ATTACH_DIR")))
 228     (setq dir (read-directory-name "Attachment directory: " dir))
 229     (org-entry-put nil "ATTACH_DIR" dir)))
 230
 231 (defun org-attach-set-inherit ()
 232   "Set the ATTACH_DIR_INHERIT property of the current entry.
 233 The property defines the directory that is used for attachments
 234 of the entry and any children that do not explicitly define (by setting
 235 the ATTACH_DIR property) their own attachment directory."
 236   (interactive)
 237   (org-entry-put nil "ATTACH_DIR_INHERIT" "t")
 238   (message "Children will inherit attachment directory"))
 239
 240 (defun org-attach-commit ()
 241   "Commit changes to git if `org-attach-directory' is properly initialized.
 242 This checks for the existence of a \".git\" directory in that directory."
 243   (let ((dir (expand-file-name org-attach-directory)))
 244     (if (file-exists-p (expand-file-name ".git" dir))
 245         (shell-command
 246          (concat "(cd " dir "; "
 247                  " git add .; "
 248                  " git ls-files --deleted -z | xargs -0 git rm; "
 249                  " git commit -m 'Synchronized attachments')")))))
 250
 251 (defun org-attach-tag (&optional off)
 252   "Turn the autotag on or (if OFF is set) off."
 253   (when org-attach-auto-tag
 254     (save-excursion
 255       (org-back-to-heading t)
 256       (org-toggle-tag org-attach-auto-tag (if off 'off 'on)))))
 257
 258 (defun org-attach-untag ()
 259   "Turn the autotag off."
 260   (org-attach-tag 'off))
 261
 262 (defun org-attach-attach (file &optional visit-dir method)
 263   "Move/copy/link FILE into the attachment directory of the current task.
 264 If VISIT-DIR is non-nil, visit the directory with dired.
 265 METHOD may be `cp', `mv', or `ln', default taken from `org-attach-method'."
 266   (interactive "fFile to keep as an attachment: \nP")
 267   (setq method (or method org-attach-method))
 268   (let ((basename (file-name-nondirectory file)))
 269     (when (and org-attach-file-list-property (not org-attach-inherited))
 270       (org-entry-add-to-multivalued-property
 271        (point) org-attach-file-list-property basename))
 272     (let* ((attach-dir (org-attach-dir t))
 273            (fname (expand-file-name basename attach-dir)))
 274       (cond
 275        ((eq method 'mv) (rename-file file fname))
 276        ((eq method 'cp) (copy-file file fname))
 277        ((eq method 'ln) (add-name-to-file file fname)))
 278       (org-attach-commit)
 279       (org-attach-tag)
 280       (if visit-dir
 281           (dired attach-dir)
 282         (message "File \"%s\" is now a task attachment." basename)))))
 283
 284 (defun org-attach-attach-cp ()
 285   "Attach a file by copying it."
 286   (interactive)
 287   (let ((org-attach-method 'cp)) (call-interactively 'org-attach-attach)))
 288 (defun org-attach-attach-mv ()
 289   "Attach a file by moving (renaming) it."
 290   (interactive)
 291   (let ((org-attach-method 'mv)) (call-interactively 'org-attach-attach)))
 292 (defun org-attach-attach-ln ()
 293   "Attach a file by creating a hard link to it.
 294 Beware that this does not work on systems that do not support hard links.
 295 On some systems, this apparently does copy the file instead."
 296   (interactive)
 297   (let ((org-attach-method 'ln)) (call-interactively 'org-attach-attach)))
 298
 299 (defun org-attach-new (file)
 300   "Create a new attachment FILE for the current task.
 301 The attachment is created as an Emacs buffer."
 302   (interactive "sCreate attachment named: ")
 303   (when (and org-attach-file-list-property (not org-attach-inherited))
 304     (org-entry-add-to-multivalued-property
 305      (point) org-attach-file-list-property file))
 306   (let ((attach-dir (org-attach-dir t)))
 307     (org-attach-tag)
 308     (find-file (expand-file-name file attach-dir))
 309     (message "New attachment %s" file)))
 310
 311 (defun org-attach-delete-one (&optional file)
 312   "Delete a single attachment."
 313   (interactive)
 314   (let* ((attach-dir (org-attach-dir t))
 315          (files (org-attach-file-list attach-dir))
 316          (file (or file
 317                    (org-icompleting-read
 318                     "Delete attachment: "
 319                     (mapcar (lambda (f)
 320                               (list (file-name-nondirectory f)))
 321                             files)))))
 322     (setq file (expand-file-name file attach-dir))
 323     (unless (file-exists-p file)
 324       (error "No such attachment: %s" file))
 325     (delete-file file)))
 326
 327 (defun org-attach-delete-all (&optional force)
 328   "Delete all attachments from the current task.
 329 This actually deletes the entire attachment directory.
 330 A safer way is to open the directory in dired and delete from there."
 331   (interactive "P")
 332   (when (and org-attach-file-list-property (not org-attach-inherited))
 333     (org-entry-delete (point) org-attach-file-list-property))
 334   (let ((attach-dir (org-attach-dir)))
 335     (when
 336         (and attach-dir
 337              (or force
 338                  (y-or-n-p "Are you sure you want to remove all attachments of this entry? ")))
 339       (shell-command (format "rm -fr %s" attach-dir))
 340       (message "Attachment directory removed")
 341       (org-attach-commit)
 342       (org-attach-untag))))
 343
 344 (defun org-attach-sync ()
 345   "Synchronize the current tasks with its attachments.
 346 This can be used after files have been added externally."
 347   (interactive)
 348   (org-attach-commit)
 349   (when (and org-attach-file-list-property (not org-attach-inherited))
 350     (org-entry-delete (point) org-attach-file-list-property))
 351   (let ((attach-dir (org-attach-dir)))
 352     (when attach-dir
 353       (let ((files (org-attach-file-list attach-dir)))
 354         (and files (org-attach-tag))
 355         (when org-attach-file-list-property
 356           (dolist (file files)
 357             (unless (string-match "^\\." file)
 358               (org-entry-add-to-multivalued-property
 359                (point) org-attach-file-list-property file))))))))
 360
 361 (defun org-attach-file-list (dir)
 362   "Return a list of files in the attachment directory.
 363 This ignores files starting with a \".\", and files ending in \"~\"."
 364   (delq nil
 365         (mapcar (lambda (x) (if (string-match "^\\." x) nil x))
 366                 (directory-files dir nil "[^~]\\'"))))
 367
 368 (defun org-attach-reveal ()
 369   "Show the attachment directory of the current task in dired."
 370   (interactive)
 371   (let ((attach-dir (org-attach-dir t)))
 372     (org-open-file attach-dir)))
 373
 374 (defun org-attach-reveal-in-emacs ()
 375   "Show the attachment directory of the current task.
 376 This will attempt to use an external program to show the directory."
 377   (interactive)
 378   (let ((attach-dir (org-attach-dir t)))
 379     (dired attach-dir)))
 380
 381 (defun org-attach-open (&optional in-emacs)
 382   "Open an attachment of the current task.
 383 If there are more than one attachment, you will be prompted for the file name.
 384 This command will open the file using the settings in `org-file-apps'
 385 and in the system-specific variants of this variable.
 386 If IN-EMACS is non-nil, force opening in Emacs."
 387   (interactive "P")
 388   (let* ((attach-dir (org-attach-dir t))
 389          (files (org-attach-file-list attach-dir))
 390          (file (if (= (length files) 1)
 391                    (car files)
 392                  (org-icompleting-read "Open attachment: "
 393                                   (mapcar 'list files) nil t))))
 394     (org-open-file (expand-file-name file attach-dir) in-emacs)))
 395
 396 (defun org-attach-open-in-emacs ()
 397   "Open attachment, force opening in Emacs.
 398 See `org-attach-open'."
 399   (interactive)
 400   (org-attach-open 'in-emacs))
 401
 402 (defun org-attach-expand (file)
 403   "Return the full path to the current entry's attachment file FILE.
 404 Basically, this adds the path to the attachment directory."
 405   (expand-file-name file (org-attach-dir)))
 406
 407 (defun org-attach-expand-link (file)
 408   "Return a file link pointing to the current entry's attachment file FILE.
 409 Basically, this adds the path to the attachment directory, and a \"file:\"
 410 prefix."
 411   (concat "file:" (org-attach-expand file)))
 412
 413 (provide 'org-attach)
 414
 415 ;; arch-tag: fce93c2e-fe07-4fa3-a905-e10dcc7a6248
 416 ;;; org-attach.el ends here