lisp/org/org-attach.el

   1 ;;; org-attach.el --- Manage file attachments to org-mode tasks
   2
   3 ;; Copyright (C) 2008 Free Software Foundation, Inc.
   4
   5 ;; Author: John Wiegley <johnw@newartisans.com>
   6 ;; Keywords: org data task
   7 ;; Version: 6.16
   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 directory given by `org-directory'.  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   :group 'org-attach
  69   :type '(choice
  70           (const :tag "None" nil)
  71           (string :tag "Tag")))
  72
  73 (defcustom org-attach-method 'cp
  74   "The preferred method to attach a file.
  75 Allowed values are:
  76
  77 mv    rename the file to move it into the attachment directory
  78 cp    copy the file
  79 ln    create a hard link.  Note that this is not supported
  80       on all systems, and then the result is not defined."
  81   :group 'org-attach
  82   :type '(choice
  83           (const :tag "Copy" cp)
  84           (const :tag "Move/Rename" mv)
  85           (const :tag "Link" ln)))
  86
  87 (defcustom org-attach-expert nil
  88   "Non-nil means do not show the splash buffer with the attach dispatcher."
  89   :group 'org-attach
  90   :type 'boolean)
  91
  92 ;;;###autoload
  93 (defun org-attach ()
  94   "The dispatcher for attachment commands.
  95 Shows a list of commands and prompts for another key to execute a command."
  96   (interactive)
  97   (let (c marker)
  98     (when (eq major-mode 'org-agenda-mode)
  99       (setq marker (or (get-text-property (point) 'org-hd-marker)
 100                        (get-text-property (point) 'org-marker)))
 101       (unless marker
 102         (error "No task in current line")))
 103     (save-excursion
 104       (when marker
 105         (set-buffer (marker-buffer marker))
 106         (goto-char marker))
 107       (org-back-to-heading t)
 108       (save-excursion
 109         (save-window-excursion
 110           (unless org-attach-expert
 111             (with-output-to-temp-buffer "*Org Attach*"
 112               (princ "Select an Attachment Command:
 113
 114 a       Select a file and attach it to the task, using `org-attach-method'.
 115 c/m/l   Attach a file using copy/move/link method.
 116 n       Create a new attachment, as an Emacs buffer.
 117 z       Synchronize the current task with its attachment
 118         directory, in case you added attachments yourself.
 119
 120 o       Open current task's attachments.
 121 O       Like \"o\", but force opening in Emacs.
 122 f       Open current task's attachment directory.
 123 F       Like \"f\", but force using dired in Emacs.
 124
 125 d       Delete one attachment, you will be prompted for a file name.
 126 D       Delete all of a task's attachments.  A safer way is
 127         to open the directory in dired and delete from there.")))
 128           (org-fit-window-to-buffer (get-buffer-window "*Org Attach*"))
 129           (message "Select command: [acmlzoOfFdD]")
 130           (setq c (read-char-exclusive))
 131           (and (get-buffer "*Org Attach*") (kill-buffer "*Org Attach*"))))
 132       (cond
 133        ((memq c '(?a ?\C-a)) (call-interactively 'org-attach-attach))
 134        ((memq c '(?c ?\C-c))
 135         (let ((org-attach-method 'cp)) (call-interactively 'org-attach-attach)))
 136        ((memq c '(?m ?\C-m))
 137         (let ((org-attach-method 'mv)) (call-interactively 'org-attach-attach)))
 138        ((memq c '(?l ?\C-l))
 139         (let ((org-attach-method 'ln)) (call-interactively 'org-attach-attach)))
 140        ((memq c '(?n ?\C-n)) (call-interactively 'org-attach-new))
 141        ((memq c '(?z ?\C-z)) (call-interactively 'org-attach-sync))
 142        ((memq c '(?o ?\C-o)) (call-interactively 'org-attach-open))
 143        ((eq c ?O)            (call-interactively 'org-attach-open-in-emacs))
 144        ((memq c '(?f ?\C-f)) (call-interactively 'org-attach-reveal))
 145        ((memq c '(?F))       (call-interactively 'org-attach-reveal-in-emacs))
 146        ((memq c '(?d ?\C-d)) (call-interactively
 147                               'org-attach-delete-one))
 148        ((eq c ?D)            (call-interactively 'org-attach-delete-all))
 149        ((eq c ?q)            (message "Abort"))
 150        (t (error "No such attachment command %c" c))))))
 151
 152 (defun org-attach-dir (&optional create-if-not-exists-p)
 153   "Return the directory associated with the current entry.
 154 If the directory does not exist and CREATE-IF-NOT-EXISTS-P is non-nil,
 155 the directory and the corresponding ID will be created."
 156   (when (and (not (buffer-file-name (buffer-base-buffer)))
 157              (not (file-name-absolute-p org-attach-directory)))
 158     (error "Need absolute `org-attach-directory' to attach in buffers without filename."))
 159   (let ((uuid (org-id-get (point) create-if-not-exists-p)))
 160     (when (or uuid create-if-not-exists-p)
 161       (unless uuid
 162         (error "ID retrieval/creation failed"))
 163       (let ((attach-dir (expand-file-name
 164                          (format "%s/%s"
 165                                  (substring uuid 0 2)
 166                                  (substring uuid 2))
 167                          (expand-file-name org-attach-directory))))
 168         (if (and create-if-not-exists-p
 169                  (not (file-directory-p attach-dir)))
 170             (make-directory attach-dir t))
 171         (and (file-exists-p attach-dir)
 172              attach-dir)))))
 173
 174 (defun org-attach-commit ()
 175   "Commit changes to git if `org-attach-directory' is properly initialized.
 176 This checks for the existence of a \".git\" directory in that directory."
 177   (let ((dir (expand-file-name org-attach-directory)))
 178     (if (file-exists-p (expand-file-name ".git" dir))
 179         (shell-command
 180          (concat "(cd " dir "; "
 181                  " git add .; "
 182                  " git ls-files --deleted -z | xargs -0 git rm; "
 183                  " git commit -m 'Synchronized attachments')")))))
 184
 185 (defun org-attach-tag (&optional off)
 186   "Turn the autotag on or (if OFF is set) off."
 187   (when org-attach-auto-tag
 188     (save-excursion
 189       (org-back-to-heading t)
 190       (org-toggle-tag org-attach-auto-tag (if off 'off 'on)))))
 191
 192 (defun org-attach-untag ()
 193   "Turn the autotag off."
 194   (org-attach-tag 'off))
 195
 196 (defun org-attach-attach (file &optional visit-dir method)
 197   "Move/copy/link FILE into the attachment directory of the current task.
 198 If VISIT-DIR is non-nil, visit the directory with dired.
 199 METHOD may be `cp', `mv', or `ln', default taken from `org-attach-method'."
 200   (interactive "fFile to keep as an attachment: \nP")
 201   (setq method (or method org-attach-method))
 202   (let ((basename (file-name-nondirectory file)))
 203     (when org-attach-file-list-property
 204       (org-entry-add-to-multivalued-property
 205        (point) org-attach-file-list-property basename))
 206     (let* ((attach-dir (org-attach-dir t))
 207            (fname (expand-file-name basename attach-dir)))
 208       (cond
 209        ((eq method 'mv) (rename-file file fname))
 210        ((eq method 'cp) (copy-file file fname))
 211        ((eq method 'ln) (add-name-to-file file fname)))
 212       (org-attach-commit)
 213       (org-attach-tag)
 214       (if visit-dir
 215           (dired attach-dir)
 216         (message "File \"%s\" is now a task attachment." basename)))))
 217
 218 (defun org-attach-attach-cp ()
 219   "Attach a file by copying it."
 220   (interactive)
 221   (let ((org-attach-method 'cp)) (call-interactively 'org-attach-attach)))
 222 (defun org-attach-attach-mv ()
 223   "Attach a file by moving (renaming) it."
 224   (interactive)
 225   (let ((org-attach-method 'mv)) (call-interactively 'org-attach-attach)))
 226 (defun org-attach-attach-ln ()
 227   "Attach a file by creating a hard link to it.
 228 Beware that this does not work on systems that do not support hard links.
 229 On some systems, this apparently does copy the file instead."
 230   (interactive)
 231   (let ((org-attach-method 'ln)) (call-interactively 'org-attach-attach)))
 232
 233 (defun org-attach-new (file)
 234   "Create a new attachment FILE for the current task.
 235 The attachment is created as an Emacs buffer."
 236   (interactive "sCreate attachment named: ")
 237   (when org-attach-file-list-property
 238     (org-entry-add-to-multivalued-property
 239      (point) org-attach-file-list-property file))
 240   (let ((attach-dir (org-attach-dir t)))
 241     (org-attach-tag)
 242     (find-file (expand-file-name file attach-dir))
 243     (message "New attachment %s" file)))
 244
 245 (defun org-attach-delete-one (&optional file)
 246   "Delete a single attachment."
 247   (interactive)
 248   (let* ((attach-dir (org-attach-dir t))
 249          (files (org-attach-file-list attach-dir))
 250          (file (or file
 251                    (org-ido-completing-read
 252                     "Delete attachment: "
 253                     (mapcar (lambda (f)
 254                               (list (file-name-nondirectory f)))
 255                             files)))))
 256     (setq file (expand-file-name file attach-dir))
 257     (unless (file-exists-p file)
 258       (error "No such attachment: %s" file))
 259     (delete-file file)))
 260
 261 (defun org-attach-delete-all (&optional force)
 262   "Delete all attachments from the current task.
 263 This actually deletes the entire attachment directory.
 264 A safer way is to open the directory in dired and delete from there."
 265   (interactive "P")
 266   (when org-attach-file-list-property
 267     (org-entry-delete (point) org-attach-file-list-property))
 268   (let ((attach-dir (org-attach-dir)))
 269     (when
 270         (and attach-dir
 271              (or force
 272                  (y-or-n-p "Are you sure you want to remove all attachments of this entry? ")))
 273       (shell-command (format "rm -fr %s" attach-dir))
 274       (message "Attachment directory removed")
 275       (org-attach-commit)
 276       (org-attach-untag))))
 277
 278 (defun org-attach-sync ()
 279   "Synchronize the current tasks with its attachments.
 280 This can be used after files have been added externally."
 281   (interactive)
 282   (org-attach-commit)
 283   (when org-attach-file-list-property
 284     (org-entry-delete (point) org-attach-file-list-property))
 285   (let ((attach-dir (org-attach-dir)))
 286     (when attach-dir
 287       (let ((files (org-attach-file-list attach-dir)))
 288         (and files (org-attach-tag))
 289         (when org-attach-file-list-property
 290           (dolist (file files)
 291             (unless (string-match "^\\." file)
 292               (org-entry-add-to-multivalued-property
 293                (point) org-attach-file-list-property file))))))))
 294
 295 (defun org-attach-file-list (dir)
 296   "Return a list of files in the attachment directory.
 297 This ignores files starting with a \".\", and files ending in \"~\"."
 298   (delq nil
 299         (mapcar (lambda (x) (if (string-match "^\\." x) nil x))
 300                 (directory-files dir nil "[^~]\\'"))))
 301
 302 (defun org-attach-reveal ()
 303   "Show the attachment directory of the current task in dired."
 304   (interactive)
 305   (let ((attach-dir (org-attach-dir t)))
 306     (org-open-file attach-dir)))
 307
 308 (defun org-attach-reveal-in-emacs ()
 309   "Show the attachment directory of the current task.
 310 This will attempt to use an external program to show the directory."
 311   (interactive)
 312   (let ((attach-dir (org-attach-dir t)))
 313     (dired attach-dir)))
 314
 315 (defun org-attach-open (&optional in-emacs)
 316   "Open an attachment of the current task.
 317 If there are more than one attachment, you will be prompted for the file name.
 318 This command will open the file using the settings in `org-file-apps'
 319 and in the system-specific variants of this variable.
 320 If IN-EMACS is non-nil, force opening in Emacs."
 321   (interactive "P")
 322   (let* ((attach-dir (org-attach-dir t))
 323          (files (org-attach-file-list attach-dir))
 324          (file (if (= (length files) 1)
 325                    (car files)
 326                  (org-ido-completing-read "Open attachment: "
 327                                   (mapcar 'list files) nil t))))
 328     (org-open-file (expand-file-name file attach-dir) in-emacs)))
 329
 330 (defun org-attach-open-in-emacs ()
 331   "Open attachment, force opening in Emacs.
 332 See `org-attach-open'."
 333   (interactive)
 334   (org-attach-open 'in-emacs))
 335
 336 (defun org-attach-expand (file)
 337   "Return the full path to the current entry's attachment file FILE.
 338 Basically, this adds the path to the attachment directory."
 339   (expand-file-name file (org-attach-dir)))
 340
 341 (defun org-attach-expand-link (file)
 342   "Return a file link pointing to the current entry's attachment file FILE.
 343 Basically, this adds the path to the attachment directory, and a \"file:\"
 344 prefix."
 345   (concat "file:" (org-attach-expand file)))
 346
 347 (provide 'org-attach)
 348
 349 ;; arch-tag: fce93c2e-fe07-4fa3-a905-e10dcc7a6248
 350 ;;; org-attach.el ends here