org-attach*, org, org-manual, org-news, ox-html, testing/*

* lisp/org-attach.el

Changed the way attachments deal with property-inheritance.  It now
adheres to the =org-use-property-inheritance= setting by default but
it can be customized if needed (I recommend to enable it!).
The property ATTACH_DIR is deprecated in favour of the shorter and simpler
property DIR.

Added an explicit option to =org-attach= for unsetting
attachment-directories (i.e. remove DIR property and deal with the
attachments by interaction).

Added attachment link type with the prefix "attachment:".

Added customizations:
- org-attach-dir-relative
- org-attach-preferred-new-method
- org-attach-use-inheritance
- org-attach-id-to-path-function

Hooks added:
- org-attach-after-change-hook
- org-attach-open-hook

A new linktype "attachment" is added in order to reduce
link-duplication when wanting to link to files in attached folders of
nodes.  This works for both ID and DIR properties.  The goal is to
make the functionality for attachment links mirror the functionality
for file links.

* lisp/org-attach-git.el

New file, existing functionality.  Code here has been factored out
from org-attach.el and if GIT-functionality is to be used this module
needs to be required sepatately.  It extends org-attach by use of its
hooks.

Activating git functionality in org-attach is done by loading
org-attach-git from now on, instead of customizing a variable.

Naming of both functions and tests has been modified to match the move
of functionality into its own module.

* lisp/org.el

Inline images are shown also using attachment-links, exactly the same
as it works for file-links today.

Make org-open-at-point respect ARG when opening attachment-dir.

* lisp/org-compat.el

org-attach-directory has been deprecated in favour for
org-attach-id-dir.  The new name matches its purpose better.

* lisp/ox-html.el

Export attachment links to images as inline images, in the same way as
file links work today.

* etc/ORG-NEWS

Mention the changes in this patch.

* doc/org-manual.org

The chapter "Refile, Copy, Archive" has been split into two separate
chapters.
- "Refile, Copy and Archiving" for information related to moving
  existing data around.

- "Capture, Attachments, RSS Feeds and Protocols" for information
  related to working with external data.

The attachment-part has been rewritten and extended to match the
changes in this patch.

The new attachment link type is mentioned both inside the attachments
chapter and in the chapter dealing with links.

Documentation related to external links has been improved.

* testing/lisp/test-org-attach-annex.el

Require org-attach-git instead of org-attach, since this file tests
the GIT-functionality.

* testing/lisp/test-org-attach.el

Add tests for org-attach.

* testing/org-test.el

Define a symbol for a file to test attachments with.

* testing/examples/*

A bunch of new example files and folders are created and are used in
testing of org-attach to verify its functionality.

etc/ORG-NEWS

@@ -111,7 +111,96 @@ every other backend was already using xcolor to set fg and bg, the CLI
 alternative was removed and there is no more a :use-xcolor options
 since now it's implicitly always true.
 
+*** Org-Attach Git commit
+[[*Org-Attach has been refactored and extended][Refactoring of Org-Attach]] affected the Git commit functionality.  Not
+much, but the following changes are required if you still need to
+auto-commit attachments to git:
+
+- Customization of ~org-attach-annex-auto-get~ needs to be renamed to
+  ~org-attach-git-annex-auto-get~.
+
+- Customization of ~org-attach-commit~ is no longer needed.  Instead
+  one need to require the =org-attach-git= module in the startup.
+
 ** New features
+*** Org-Attach has been refactored and extended
+Org attach has been refactored and the functionality extended.  It
+should now be easier to understand how it works.  A few improvements
+and extra options have been added as well.
+
+From the initial comment in org-attach source-code:
+
+- Attachments are managed either by using a custom property DIR or by
+  using property ID from org-id.  When DIR is defined, a location in
+  the filesystem is directly attached to the outline node.  When
+  org-id is used, attachments are stored in a folder named after the
+  ID, in a location defined by ~org-attach-id-dir~.  DIR has
+  precedence over ID when both parameters are defined for the current
+  outline node (also when inherited parameters are taken into
+  account).
+
+From now on inheritance requires no extra property and will adhere to
+~org-attach-use-inheritance~ by default.  Inheritance can be
+customized to always be activated or never be activated in
+~org-attach-use-inheritance~.
+
+The ATTACH_DIR property is deprecated in favour of the shorter
+property DIR.  Links to folders inside the DIR property can now be
+declared as relative links.  This is not enabled by default, but can
+be set in ~org-attach-dir-relative~.
+
+When adding new attachment to the outline node the preferred way of
+doing so can be customized.  Take a look at
+~org-attach-preferred-new-method~.  It defaults to using ID since that
+was the behaviour before this change.
+
+If both DIR and ID properties are set on the same node, DIR has
+precedence and will be used.
+
+One can now also choose to build attachment-directory-paths in a
+customized way.  This is an advanced topic, but in some case it makes
+sense to parse an ID in a different way than the default one.  Create
+your own function and use it is ~org-attach-id-to-path-function~ if
+you want to customize the ID-based folder structure.
+
+If you've used ATTACH_DIR properties to manage attachments, use the
+following code to rename that property to DIR which supports the same
+functionality.  ATTACH_DIR_INHERIT is no longer supported and is
+removed.
+
+#+begin_src emacs-lisp
+  (defun org-update-attach-properties ()
+      "Change properties for Org-Attach."
+      (interactive)
+      (org-with-point-at 1
+	(while (outline-next-heading)
+	  (let ((DIR (org--property-local-values "ATTACH_DIR" nil)))
+	    (when DIR
+	      (org-set-property "DIR" (car DIR))
+	      (org-delete-property "ATTACH_DIR"))))
+	(org-delete-property-globally "ATTACH_DIR_INHERIT")))
+#+end_src
+
+For those who hate breaking changes, even though the changes are made
+to clean things up; fear not.  ATTACH_DIR will still continue to work.
+It's just not documented any longer.  When you get the chance, run the
+code above to clean things up anyways!
+
+**** New hooks
+Two hooks are added to org-attach:
+- org-attach-after-change-hook
+- org-attach-open-hook
+
+They are added mostly for internal restructuring purposes, but can
+ofc. be used for other things as well.
+
+*** New link-type: Attachment
+Attachment-links are now first-class citizens.  They mimick file-links
+in everything they do but use the existing attachment-folder as a base
+when expanding the links. Both =DIR= and =ID= properties are used to
+try to resolve the links, in exactly the same way as Org-Attach uses
+those properties.
+
 *** Handle overlay specification for notes in Beamer export
 
 This aligns Beamer notes with slide overlays.
@@ -243,6 +332,11 @@ dynamic block in ~org-dynamic-block-alist~.
 ** Removed functions
 *** ~org-babel-set-current-result-hash~
 *** ~org-capture-insert-template-here~
+*** ~org-attach-directory~
+
+It has been deprecated in favour of ~org-attach-id-dir~ which is less
+ambigous given the restructured org-attach.
+
 ** Miscellaneous
 *** Change signature for ~org-list-to-subtree~
 The function now accepts the level of the subtree as an optional

lisp/org-attach-git.el

@@ -0,0 +1,117 @@
+;;; org-attach-git.el --- Automatic git commit extention to org-attach -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2019 Free Software Foundation, Inc.
+
+;; Original Author: John Wiegley <johnw@newartisans.com>
+;; Restructurer: Gustav Wikström <gustav@whil.se>
+;; Keywords: org data git
+
+;; This file is part of GNU Emacs.
+;;
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; An extention to org-attach.  If the attachment-directory to an
+;; outline node (using either DIR or ID) is initialized as a Git
+;; repository, then org-attach-git will automatically commit changes
+;; when it sees them.
+
+;;; Code:
+
+(require 'org-attach)
+(require 'vc-git)
+
+(defcustom org-attach-git-annex-cutoff (* 32 1024)
+  "If non-nil, files larger than this will be annexed instead of stored."
+  :group 'org-attach
+  :version "24.4"
+  :package-version '(Org . "8.0")
+  :type '(choice
+	  (const :tag "None" nil)
+	  (integer :tag "Bytes")))
+
+(defcustom org-attach-git-annex-auto-get 'ask
+  "Confirmation preference for automatically getting annex files.
+If \\='ask, prompt using `y-or-n-p'.  If t, always get.  If nil, never get."
+  :group 'org-attach
+  :package-version '(Org . "9.0")
+  :version "26.1"
+  :type '(choice
+	  (const :tag "confirm with `y-or-n-p'" ask)
+	  (const :tag "always get from annex if necessary" t)
+	  (const :tag "never get from annex" nil)))
+
+(defun org-attach-git-use-annex ()
+  "Return non-nil if git annex can be used."
+  (let ((git-dir (vc-git-root (expand-file-name org-attach-id-dir))))
+    (and org-attach-git-annex-cutoff
+         (or (file-exists-p (expand-file-name "annex" git-dir))
+             (file-exists-p (expand-file-name ".git/annex" git-dir))))))
+
+(defun org-attach-git-annex-get-maybe (path)
+  "Call git annex get PATH (via shell) if using git annex.
+Signals an error if the file content is not available and it was not retrieved."
+  (let* ((default-directory (expand-file-name org-attach-id-dir))
+	 (path-relative (file-relative-name path)))
+    (when (and (org-attach-git-use-annex)
+	       (not
+		(string-equal
+		 "found"
+		 (shell-command-to-string
+		  (format "git annex find --format=found --in=here %s"
+			  (shell-quote-argument path-relative))))))
+      (let ((should-get
+	     (if (eq org-attach-git-annex-auto-get 'ask)
+		 (y-or-n-p (format "Run git annex get %s? " path-relative))
+	       org-attach-git-annex-auto-get)))
+	(unless should-get
+	  (error "File %s stored in git annex but unavailable" path))
+	(message "Running git annex get \"%s\"." path-relative)
+	(call-process "git" nil nil nil "annex" "get" path-relative)))))
+
+(defun org-attach-git-commit ()
+  "Commit changes to git if `org-attach-id-dir' is properly initialized.
+This checks for the existence of a \".git\" directory in that directory."
+  (let* ((dir (expand-file-name org-attach-id-dir))
+	 (git-dir (vc-git-root dir))
+	 (use-annex (org-attach-git-use-annex))
+	 (changes 0))
+    (when (and git-dir (executable-find "git"))
+      (with-temp-buffer
+	(cd dir)
+        (dolist (new-or-modified
+                 (split-string
+                  (shell-command-to-string
+                   "git ls-files -zmo --exclude-standard") "\0" t))
+          (if (and use-annex
+                   (>= (file-attribute-size (file-attributes new-or-modified))
+                       org-attach-git-annex-cutoff))
+              (call-process "git" nil nil nil "annex" "add" new-or-modified)
+            (call-process "git" nil nil nil "add" new-or-modified))
+	    (cl-incf changes))
+	(dolist (deleted
+		 (split-string
+		  (shell-command-to-string "git ls-files -z --deleted") "\0" t))
+	  (call-process "git" nil nil nil "rm" deleted)
+	  (cl-incf changes))
+	(when (> changes 0)
+	  (shell-command "git commit -m 'Synchronized attachments'"))))))
+
+(add-hook 'org-attach-after-change-hook 'org-attach-git-commit)
+(add-hook 'org-attach-open-hook 'org-attach-git-annex-get-maybe)
+
+(provide 'org-attach-git)
+
+;;; org-attach-git.el ends here

lisp/org-attach.el

@@ -1,9 +1,9 @@
-;;; org-attach.el --- Manage file attachments to Org tasks -*- lexical-binding: t; -*-
+;;; org-attach.el --- Manage file attachments to Org outlines -*- lexical-binding: t; -*-
 
 ;; Copyright (C) 2008-2019 Free Software Foundation, Inc.
 
 ;; Author: John Wiegley <johnw@newartisans.com>
-;; Keywords: org data task
+;; Keywords: org data attachment
 
 ;; This file is part of GNU Emacs.
 ;;
@@ -24,32 +24,30 @@
 
 ;; See the Org manual for information on how to use it.
 ;;
-;; Attachments are managed in a special directory called "data", which
-;; lives in the same directory as the org file itself.  If this data
-;; directory is initialized as a Git repository, then org-attach will
-;; automatically commit changes when it sees them.
-;;
-;; Attachment directories are identified using a UUID generated for the
-;; task which has the attachments.  These are added as property to the
-;; task when necessary, and should not be deleted or changed by the
-;; user, ever.  UUIDs are generated by a mechanism defined in the variable
-;; `org-id-method'.
+;; Attachments are managed either by using a custom property DIR or by
+;; using property ID from org-id.  When DIR is defined, a location in
+;; the filesystem is directly attached to the outline node.  When
+;; org-id is used, attachments are stored in a folder named after the
+;; ID, in a location defined by `org-attach-id-dir'.  DIR has
+;; precedence over ID when both parameters are defined for the current
+;; outline node (also when inherited parameters are taken into
+;; account).
 
 ;;; Code:
 
 (require 'cl-lib)
 (require 'org)
+(require 'ol)
 (require 'org-id)
-(require 'vc-git)
 
 (declare-function dired-dwim-target-directory "dired-aux")
 
 (defgroup org-attach nil
-  "Options concerning entry attachments in Org mode."
+  "Options concerning attachments in Org mode."
   :tag "Org Attach"
   :group 'org)
 
-(defcustom org-attach-directory "data/"
+(defcustom org-attach-id-dir "data/"
   "The directory where attachments are stored.
 If this is a relative path, it will be interpreted relative to the directory
 where the Org file lives."
@@ -57,22 +55,13 @@ where the Org file lives."
   :type 'directory
   :safe #'stringp)
 
-(defcustom org-attach-commit t
-  "If non-nil commit attachments with git.
-This is only done if the Org file is in a git repository."
+(defcustom org-attach-dir-relative nil
+  "Non-nil means directories in DIR property are added as relative links.
+Defaults to absolute location."
   :group 'org-attach
   :type 'boolean
-  :version "26.1"
-  :package-version '(Org . "9.0"))
-
-(defcustom org-attach-git-annex-cutoff (* 32 1024)
-  "If non-nil, files larger than this will be annexed instead of stored."
-  :group 'org-attach
-  :version "24.4"
-  :package-version '(Org . "8.0")
-  :type '(choice
-	  (const :tag "None" nil)
-	  (integer :tag "Bytes")))
+  :package-version '(Org . "9.3")
+  :safe #'booleanp)
 
 (defcustom org-attach-auto-tag "ATTACH"
   "Tag that will be triggered automatically when an entry has an attachment."
@@ -81,15 +70,27 @@ This is only done if the Org file is in a git repository."
 	  (const :tag "None" nil)
 	  (string :tag "Tag")))
 
-(defcustom org-attach-file-list-property "Attachments"
-  "The property used to keep a list of attachment belonging to this entry.
-This is not really needed, so you may set this to nil if you don't want it.
-Also, for entries where children inherit the directory, the list of
-attachments is not kept in this property."
+(defcustom org-attach-preferred-new-method 'id
+  "Preferred way to attach to nodes without existing ID and DIR property.
+This choice is used when adding attachments to nodes without ID
+and DIR properties.
+
+Allowed values are:
+
+id         Create and use an ID parameter
+dir        Create and use a DIR parameter
+ask        Ask the user for input of which method to choose
+nil        Prefer to not create a new parameter
+
+           nil means that ID or DIR has to be created explicitly
+           before attaching files."
   :group 'org-attach
+  :package-version '(org . "9.3")
   :type '(choice
-	  (const :tag "None" nil)
-	  (string :tag "Tag")))
+	  (const :tag "ID parameter" id)
+	  (const :tag "DIR parameter" dir)
+	  (const :tag "Ask user" ask)
+	  (const :tag "Don't create" nil)))
 
 (defcustom org-attach-method 'cp
   "The preferred method to attach a file.
@@ -113,14 +114,24 @@ lns   create a symbol link.  Note that this is not supported
   :group 'org-attach
   :type 'boolean)
 
-(defcustom org-attach-allow-inheritance t
-  "Non-nil means allow attachment directories be inherited."
+(defcustom org-attach-use-inheritance 'selective
+  "Attachment inheritance for the outline.
+
+Enabling inheritance for org-attach implies two things.  First,
+that attachment links will look through all parent headings until
+it finds the linked attachment.  Second, that running org-attach
+inside a node without attachments will make org-attach operate on
+the first parent heading it finds with an attachment.
+
+Selective means to respect the inheritance setting in
+`org-use-property-inheritance'."
   :group 'org-attach
+  :type '(choice
+	  (const :tag "Don't use inheritance" nil)
+	  (const :tag "Inherit parent node attachments" t)
+	  (const :tag "Respect org-use-property-inheritance" selective))
   :type 'boolean)
 
-(defvar org-attach-inherited nil
-  "Indicates if the last access to the attachment directory was inherited.")
-
 (defcustom org-attach-store-link-p nil
   "Non-nil means store a link to a file when attaching it."
   :group 'org-attach
@@ -141,16 +152,28 @@ When set to `query', ask the user instead."
 	  (const :tag "Always delete attachments" t)
 	  (const :tag "Query the user" query)))
 
-(defcustom org-attach-annex-auto-get 'ask
-  "Confirmation preference for automatically getting annex files.
-If \\='ask, prompt using `y-or-n-p'.  If t, always get.  If nil, never get."
+(defun org-attach-id-folder-format (id)
+  "Translate an ID into a folder-path.
+Default format for how Org translates ID properties to a path for
+attachments."
+  (format "%s/%s"
+	  (substring id 0 2)
+	  (substring id 2)))
+
+(defcustom org-attach-id-to-path-function #'org-attach-id-folder-format
+  "Function parsing the ID parameter into a folder-path."
   :group 'org-attach
-  :package-version '(Org . "9.0")
-  :version "26.1"
-  :type '(choice
-	  (const :tag "confirm with `y-or-n-p'" ask)
-	  (const :tag "always get from annex if necessary" t)
-	  (const :tag "never get from annex" nil)))
+  :package-version '(Org . "9.3")
+  :type 'function)
+
+(defvar org-attach-after-change-hook nil
+  "Hook to be called when files have been added or removed to the attachment folder.")
+
+(defvar org-attach-open-hook nil
+  "Hook that is invoked by `org-attach-open'.
+
+Created mostly to be compatible with org-attach-git after removing
+git-funtionality from this file.")
 
 (defcustom org-attach-commands
   '(((?a ?\C-a) org-attach-attach
@@ -186,9 +209,9 @@ you added attachments yourself.\n")
      "Delete all of a task's attachments.  A safer way is\n to open the \
 directory in dired and delete from there.\n")
     ((?s ?\C-s) org-attach-set-directory
-     "Set a specific attachment directory for this entry or reset to default.")
-    ((?i ?\C-i) org-attach-set-inherit
-     "Make children of the current entry inherit its attachment directory.\n")
+     "Set a specific attachment directory for this entry. Sets DIR property.")
+    ((?S ?\C-S) org-attach-unset-directory
+     "Unset the attachment directory for this entry.  Removes DIR property.")
     ((?q) (lambda () (interactive) (message "Abort")) "Abort."))
   "The list of commands for the attachment dispatcher.
 Each entry in this list is a list of three elements:
@@ -215,7 +238,7 @@ Shows a list of commands and prompts for another key to execute a command."
       (setq marker (or (get-text-property (point) 'org-hd-marker)
 		       (get-text-property (point) 'org-marker)))
       (unless marker
-	(error "No task in current line")))
+	(error "No item in current line")))
     (save-excursion
       (when marker
 	(set-buffer (marker-buffer marker))
@@ -225,24 +248,28 @@ Shows a list of commands and prompts for another key to execute a command."
 	(save-window-excursion
 	  (unless org-attach-expert
 	    (with-output-to-temp-buffer "*Org Attach*"
-	      (princ
-	       (format "Select an Attachment Command:\n\n%s"
-		       (mapconcat
-			(lambda (entry)
-			  (pcase entry
-			    (`((,key . ,_) ,_ ,docstring)
-			     (format "%c       %s"
-				     key
-				     (replace-regexp-in-string "\n\\([\t ]*\\)"
-							       "        "
-							       docstring
-							       nil nil 1)))
-			    (_
-			     (user-error
-			      "Invalid `org-attach-commands' item: %S"
-			      entry))))
-			org-attach-commands
-			"\n")))))
+              (princ
+               (concat "Attachment folder:\n"
+		       (or (org-attach-dir)
+			   "Can't find an existing attachment-folder")
+		       "\n\n"
+	               (format "Select an Attachment Command:\n\n%s"
+		               (mapconcat
+		                (lambda (entry)
+		                  (pcase entry
+		                    (`((,key . ,_) ,_ ,docstring)
+		                     (format "%c       %s"
+			                     key
+			                     (replace-regexp-in-string "\n\\([\t ]*\\)"
+							               "        "
+							               docstring
+							               nil nil 1)))
+		                    (_
+		                     (user-error
+			              "Invalid `org-attach-commands' item: %S"
+			              entry))))
+		                org-attach-commands
+		                "\n"))))))
 	  (org-fit-window-to-buffer (get-buffer-window "*Org Attach*"))
 	  (message "Select command: [%s]"
 		   (concat (mapcar #'caar org-attach-commands)))
@@ -256,148 +283,126 @@ Shows a list of commands and prompts for another key to execute a command."
 	  (error "No such attachment command: %c" c))))))
 
 (defun org-attach-dir (&optional create-if-not-exists-p)
-  "Return the directory associated with the current entry.
-This first checks for a local property ATTACH_DIR, and then for an inherited
-property ATTACH_DIR_INHERIT.  If neither exists, the default mechanism
-using the entry ID will be invoked to access the unique directory for the
-current entry.
-If the directory does not exist and CREATE-IF-NOT-EXISTS-P is non-nil,
-the directory and (if necessary) the corresponding ID will be created."
-  (let (attach-dir uuid)
-    (setq org-attach-inherited (org-entry-get nil "ATTACH_DIR_INHERIT"))
+  "Return the directory associated with the current outline node.
+First check for DIR property, then ID property.
+`org-attach-use-inheritance' determines whether inherited
+properties also will be considered.
+
+If an ID property is found the default mechanism using that ID
+will be invoked to access the directory for the current entry.
+
+If CREATE-IF-NOT-EXIST-P is non-nil, `org-attach-dir-get-create'
+is run."
+  (let (attach-dir id)
     (cond
-     ((setq attach-dir (org-entry-get nil "ATTACH_DIR"))
+     (create-if-not-exists-p
+      (setq attach-dir (org-attach-dir-get-create)))
+     ((setq attach-dir (org-entry-get nil "DIR" org-attach-use-inheritance))
       (org-attach-check-absolute-path attach-dir))
-     ((and org-attach-allow-inheritance
-	   (org-entry-get nil "ATTACH_DIR_INHERIT" t))
-      (setq attach-dir
-	    (org-with-wide-buffer
-	     (if (marker-position org-entry-property-inherited-from)
-		 (goto-char org-entry-property-inherited-from)
-	       (org-back-to-heading t))
-	     (let (org-attach-allow-inheritance)
-	       (org-attach-dir create-if-not-exists-p))))
-      (org-attach-check-absolute-path attach-dir)
-      (setq org-attach-inherited t))
-     (t					; use the ID
+     ;; Deprecated and removed from documentation, but still
+     ;; works. FIXME: Remove after major nr change.
+     ((setq attach-dir (org-entry-get nil "ATTACH_DIR" org-attach-use-inheritance))
+      (org-attach-check-absolute-path attach-dir))
+     ((setq id (org-entry-get nil "ID" org-attach-use-inheritance))
       (org-attach-check-absolute-path nil)
-      (setq uuid (org-id-get (point) create-if-not-exists-p))
-      (when (or uuid create-if-not-exists-p)
-	(unless uuid (error "ID retrieval/creation failed"))
-	(setq attach-dir (expand-file-name
-			  (format "%s/%s"
-				  (substring uuid 0 2)
-				  (substring uuid 2))
-			  (expand-file-name org-attach-directory))))))
-    (when attach-dir
-      (if (and create-if-not-exists-p
-	       (not (file-directory-p attach-dir)))
-	  (make-directory attach-dir t))
-      (and (file-exists-p attach-dir)
-	   attach-dir))))
+      (setq attach-dir (org-attach-dir-from-id id))))
+    attach-dir))
+
+(defun org-attach-dir-get-create ()
+  "Return existing or new directory associated with the current outline node.
+
+`org-attach-preferred-new-method' decides how to attach
+new directory."
+  (interactive)
+  (let ((attach-dir (org-attach-dir)))
+    (unless attach-dir
+      (let (answer)
+	(when (eq org-attach-preferred-new-method 'ask)
+	  (message "Create new ID [1] property or DIR [2] property for attachments?")
+	  (setq answer (read-char-exclusive)))
+	(cond
+	 ((or (eq org-attach-preferred-new-method 'id) (eq answer ?1))
+	  (setq attach-dir (org-attach-dir-from-id (org-id-get nil t))))
+	 ((or (eq org-attach-preferred-new-method 'dir) (eq answer ?2))
+	  (setq attach-dir (org-attach-set-directory)))
+	 ((eq org-attach-preferred-new-method 'nil)
+	  (error "No existing directory. DIR or ID property has to be explicitly created")))))
+    (unless attach-dir
+      (error "No attachment directory is associated with the current node"))
+    (unless (file-directory-p attach-dir)
+      (make-directory attach-dir t))
+    attach-dir))
+
+(defun org-attach-dir-from-id (id)
+  "Returns a file name based on `org-attach-id-dir' and ID."
+  (expand-file-name
+   (funcall org-attach-id-to-path-function id)
+   (expand-file-name org-attach-id-dir)))
 
 (defun org-attach-check-absolute-path (dir)
   "Check if we have enough information to root the attachment directory.
 When DIR is given, check also if it is already absolute.  Otherwise,
-assume that it will be relative, and check if `org-attach-directory' is
+assume that it will be relative, and check if `org-attach-id-dir' is
 absolute, or if at least the current buffer has a file name.
 Throw an error if we cannot root the directory."
   (or (and dir (file-name-absolute-p dir))
-      (file-name-absolute-p org-attach-directory)
+      (file-name-absolute-p org-attach-id-dir)
       (buffer-file-name (buffer-base-buffer))
-      (error "Need absolute `org-attach-directory' to attach in buffers without filename")))
+      (error "Need absolute `org-attach-id-dir' to attach in buffers without filename")))
 
-(defun org-attach-set-directory (&optional arg)
-  "Set the ATTACH_DIR node property and ask to move files there.
+(defun org-attach-set-directory ()
+  "Set the DIR node property and ask to move files there.
 The property defines the directory that is used for attachments
-of the entry.  When called with `\\[universal-argument]', reset \
-the directory to
-the default ID based one."
-  (interactive "P")
+of the entry.  Creates relative links if `org-attach-dir-relative'
+is non-nil.
+
+Return the directory."
+  (interactive)
   (let ((old (org-attach-dir))
-        (new
-         (progn
-           (if arg (org-entry-delete nil "ATTACH_DIR")
-             (let ((dir (read-directory-name
-                         "Attachment directory: "
-                         (org-entry-get nil
-                                        "ATTACH_DIR"
-                                        (and org-attach-allow-inheritance t)))))
-               (org-entry-put nil "ATTACH_DIR" dir)))
-           (org-attach-dir t))))
+	(new
+	 (let* ((attach-dir (read-directory-name
+			     "Attachment directory: "
+			     (org-entry-get nil "DIR")))
+		(current-dir (file-name-directory (or default-directory
+						      buffer-file-name)))
+		(attach-dir-relative (file-relative-name attach-dir current-dir)))
+	   (org-entry-put nil "DIR" (if org-attach-dir-relative
+					attach-dir-relative
+				      attach-dir))
+           attach-dir)))
     (unless (or (string= old new)
                 (not old))
       (when (yes-or-no-p "Copy over attachments from old directory? ")
+        (copy-directory old new t t t))
+      (when (yes-or-no-p (concat "Delete " old))
+        (delete-directory old t)))
+    new))
+
+(defun org-attach-unset-directory ()
+  "Removes DIR node property.
+If attachment folder is changed due to removal of DIR-property
+ask to move attachments to new location and ask to delete old
+attachment-folder.
+
+Change of attachment-folder due to unset might be if an ID
+property is set on the node, or if a separate inherited
+DIR-property exists (that is different than the unset one)."
+  (interactive)
+  (let ((old (org-attach-dir))
+	(new
+         (progn
+	   (org-entry-delete nil "DIR")
+	   ;; ATTACH-DIR is deprecated and removed from documentation,
+	   ;; but still works. Remove code for it after major nr change.
+	   (org-entry-delete nil "ATTACH_DIR")
+	   (org-attach-dir))))
+    (unless (or (string= old new)
+                (not old))
+      (when (and new (yes-or-no-p "Copy over attachments from old directory? "))
         (copy-directory old new t nil t))
       (when (yes-or-no-p (concat "Delete " old))
         (delete-directory old t)))))
 
-(defun org-attach-set-inherit ()
-  "Set the ATTACH_DIR_INHERIT property of the current entry.
-The property defines the directory that is used for attachments
-of the entry and any children that do not explicitly define (by setting
-the ATTACH_DIR property) their own attachment directory."
-  (interactive)
-  (org-entry-put nil "ATTACH_DIR_INHERIT" "t")
-  (message "Children will inherit attachment directory"))
-
-(defun org-attach-use-annex ()
-  "Return non-nil if git annex can be used."
-  (let ((git-dir (vc-git-root (expand-file-name org-attach-directory))))
-    (and org-attach-git-annex-cutoff
-         (or (file-exists-p (expand-file-name "annex" git-dir))
-             (file-exists-p (expand-file-name ".git/annex" git-dir))))))
-
-(defun org-attach-annex-get-maybe (path)
-  "Call git annex get PATH (via shell) if using git annex.
-Signals an error if the file content is not available and it was not retrieved."
-  (let* ((default-directory (expand-file-name org-attach-directory))
-	 (path-relative (file-relative-name path)))
-    (when (and (org-attach-use-annex)
-	       (not
-		(string-equal
-		 "found"
-		 (shell-command-to-string
-		  (format "git annex find --format=found --in=here %s"
-			  (shell-quote-argument path-relative))))))
-      (let ((should-get
-	     (if (eq org-attach-annex-auto-get 'ask)
-		 (y-or-n-p (format "Run git annex get %s? " path-relative))
-	       org-attach-annex-auto-get)))
-	(if should-get
-	    (progn (message "Running git annex get \"%s\"." path-relative)
-		   (call-process "git" nil nil nil "annex" "get" path-relative))
-	  (error "File %s stored in git annex but it is not available, and was not retrieved"
-		 path))))))
-
-(defun org-attach-commit ()
-  "Commit changes to git if `org-attach-directory' is properly initialized.
-This checks for the existence of a \".git\" directory in that directory."
-  (let* ((dir (expand-file-name org-attach-directory))
-	 (git-dir (vc-git-root dir))
-	 (use-annex (org-attach-use-annex))
-	 (changes 0))
-    (when (and git-dir (executable-find "git"))
-      (with-temp-buffer
-	(cd dir)
-        (dolist (new-or-modified
-                 (split-string
-                  (shell-command-to-string
-                   "git ls-files -zmo --exclude-standard") "\0" t))
-          (if (and use-annex
-                   (>= (file-attribute-size (file-attributes new-or-modified))
-                       org-attach-git-annex-cutoff))
-              (call-process "git" nil nil nil "annex" "add" new-or-modified)
-            (call-process "git" nil nil nil "add" new-or-modified))
-	    (cl-incf changes))
-	(dolist (deleted
-		 (split-string
-		  (shell-command-to-string "git ls-files -z --deleted") "\0" t))
-	  (call-process "git" nil nil nil "rm" deleted)
-	  (cl-incf changes))
-	(when (> changes 0)
-	  (shell-command "git commit -m 'Synchronized attachments'"))))))
-
 (defun org-attach-tag (&optional off)
   "Turn the autotag on or (if OFF is set) off."
   (when org-attach-auto-tag
@@ -423,22 +428,21 @@ Only do this when `org-attach-store-link-p' is non-nil."
     (org-attach-attach url)))
 
 (defun org-attach-buffer (buffer-name)
-  "Attach BUFFER-NAME's contents to current task.
+  "Attach BUFFER-NAME's contents to current outline node.
 BUFFER-NAME is a string.  Signals a `file-already-exists' error
 if it would overwrite an existing filename."
   (interactive "bBuffer whose contents should be attached: ")
-  (let ((output (expand-file-name buffer-name (org-attach-dir t))))
+  (let* ((attach-dir (org-attach-dir 'get-create))
+	 (output (expand-file-name buffer-name attach-dir)))
     (when (file-exists-p output)
       (signal 'file-already-exists (list "File exists" output)))
-    (when (and org-attach-file-list-property (not org-attach-inherited))
-      (org-entry-add-to-multivalued-property
-       (point) org-attach-file-list-property buffer-name))
+    (run-hook-with-args 'org-attach-after-change-hook attach-dir)
     (org-attach-tag)
     (with-temp-file output
       (insert-buffer-substring buffer-name))))
 
 (defun org-attach-attach (file &optional visit-dir method)
-  "Move/copy/link FILE into the attachment directory of the current task.
+  "Move/copy/link FILE into the attachment directory of the current outline node.
 If VISIT-DIR is non-nil, visit the directory with dired.
 METHOD may be `cp', `mv', `ln', `lns' or `url' default taken from
 `org-attach-method'."
@@ -453,10 +457,7 @@ METHOD may be `cp', `mv', `ln', `lns' or `url' default taken from
     nil))
   (setq method (or method org-attach-method))
   (let ((basename (file-name-nondirectory file)))
-    (when (and org-attach-file-list-property (not org-attach-inherited))
-      (org-entry-add-to-multivalued-property
-       (point) org-attach-file-list-property basename))
-    (let* ((attach-dir (org-attach-dir t))
+    (let* ((attach-dir (org-attach-dir 'get-create))
            (fname (expand-file-name basename attach-dir)))
       (cond
        ((eq method 'mv) (rename-file file fname))
@@ -464,8 +465,7 @@ METHOD may be `cp', `mv', `ln', `lns' or `url' default taken from
        ((eq method 'ln) (add-name-to-file file fname))
        ((eq method 'lns) (make-symbolic-link file fname))
        ((eq method 'url) (url-copy-file file fname)))
-      (when org-attach-commit
-        (org-attach-commit))
+      (run-hook-with-args 'org-attach-after-change-hook attach-dir)
       (org-attach-tag)
       (cond ((eq org-attach-store-link-p 'attached)
              (org-attach-store-link fname))
@@ -473,7 +473,7 @@ METHOD may be `cp', `mv', `ln', `lns' or `url' default taken from
              (org-attach-store-link file)))
       (if visit-dir
           (dired attach-dir)
-        (message "File %S is now a task attachment." basename)))))
+        (message "File %S is now an attachment." basename)))))
 
 (defun org-attach-attach-cp ()
   "Attach a file by copying it."
@@ -498,13 +498,10 @@ On some systems, this apparently does copy the file instead."
   (let ((org-attach-method 'lns)) (call-interactively 'org-attach-attach)))
 
 (defun org-attach-new (file)
-  "Create a new attachment FILE for the current task.
+  "Create a new attachment FILE for the current outline node.
 The attachment is created as an Emacs buffer."
   (interactive "sCreate attachment named: ")
-  (when (and org-attach-file-list-property (not org-attach-inherited))
-    (org-entry-add-to-multivalued-property
-     (point) org-attach-file-list-property file))
-  (let ((attach-dir (org-attach-dir t)))
+  (let ((attach-dir (org-attach-dir 'get-create)))
     (org-attach-tag)
     (find-file (expand-file-name file attach-dir))
     (message "New attachment %s" file)))
@@ -512,7 +509,7 @@ The attachment is created as an Emacs buffer."
 (defun org-attach-delete-one (&optional file)
   "Delete a single attachment."
   (interactive)
-  (let* ((attach-dir (org-attach-dir t))
+  (let* ((attach-dir (org-attach-dir))
 	 (files (org-attach-file-list attach-dir))
 	 (file (or file
 		   (completing-read
@@ -524,44 +521,32 @@ The attachment is created as an Emacs buffer."
     (unless (file-exists-p file)
       (error "No such attachment: %s" file))
     (delete-file file)
-    (when org-attach-commit
-      (org-attach-commit))))
+    (run-hook-with-args 'org-attach-after-change-hook attach-dir)))
 
 (defun org-attach-delete-all (&optional force)
-  "Delete all attachments from the current task.
+  "Delete all attachments from the current outline node.
 This actually deletes the entire attachment directory.
 A safer way is to open the directory in dired and delete from there."
   (interactive "P")
-  (when (and org-attach-file-list-property (not org-attach-inherited))
-    (org-entry-delete (point) org-attach-file-list-property))
   (let ((attach-dir (org-attach-dir)))
-    (when
-	(and attach-dir
-	     (or force
-		 (y-or-n-p "Are you sure you want to remove all attachments of this entry? ")))
-      (shell-command (format "rm -fr %s" attach-dir))
+    (when (and attach-dir
+	       (or force
+		   (yes-or-no-p "Really remove all attachments of this entry? ")))
+      (delete-directory attach-dir (yes-or-no-p "Recursive?") t)
       (message "Attachment directory removed")
-      (when org-attach-commit
-        (org-attach-commit))
+      (run-hook-with-args 'org-attach-after-change-hook attach-dir)
       (org-attach-untag))))
 
 (defun org-attach-sync ()
-  "Synchronize the current tasks with its attachments.
+  "Synchronize the current outline node with its attachments.
 This can be used after files have been added externally."
   (interactive)
-  (when org-attach-commit
-    (org-attach-commit))
-  (when (and org-attach-file-list-property (not org-attach-inherited))
-    (org-entry-delete (point) org-attach-file-list-property))
   (let ((attach-dir (org-attach-dir)))
     (when attach-dir
+      (run-hook-with-args 'org-attach-after-change-hook attach-dir)
       (let ((files (org-attach-file-list attach-dir)))
-	(org-attach-tag (not files))
-	(when org-attach-file-list-property
-	  (dolist (file files)
-	    (unless (string-match "^\\.\\.?\\'" file)
-	      (org-entry-add-to-multivalued-property
-	       (point) org-attach-file-list-property file))))))))
+	(org-attach-tag (not files))))
+    (unless attach-dir (org-attach-tag t))))
 
 (defun org-attach-file-list (dir)
   "Return a list of files in the attachment directory.
@@ -570,35 +555,40 @@ This ignores files ending in \"~\"."
 	(mapcar (lambda (x) (if (string-match "^\\.\\.?\\'" x) nil x))
 		(directory-files dir nil "[^~]\\'"))))
 
-(defun org-attach-reveal (&optional if-exists)
-  "Show the attachment directory of the current task.
+(defun org-attach-reveal ()
+  "Show the attachment directory of the current outline node.
 This will attempt to use an external program to show the directory."
-  (interactive "P")
-  (let ((attach-dir (org-attach-dir (not if-exists))))
-    (and attach-dir (org-open-file attach-dir))))
+  (interactive)
+  (let ((attach-dir (org-attach-dir)))
+    (if attach-dir
+	(org-open-file attach-dir)
+      (error "No attachment directory exist"))))
 
 (defun org-attach-reveal-in-emacs ()
-  "Show the attachment directory of the current task in dired."
+  "Show the attachment directory of the current outline node in dired."
   (interactive)
-  (let ((attach-dir (org-attach-dir t)))
-    (dired attach-dir)))
+  (let ((attach-dir (org-attach-dir)))
+    (if attach-dir
+	(dired attach-dir)
+      (error "No attachment directory exist"))))
 
 (defun org-attach-open (&optional in-emacs)
-  "Open an attachment of the current task.
+  "Open an attachment of the current outline node.
 If there are more than one attachment, you will be prompted for the file name.
 This command will open the file using the settings in `org-file-apps'
 and in the system-specific variants of this variable.
 If IN-EMACS is non-nil, force opening in Emacs."
   (interactive "P")
-  (let* ((attach-dir (org-attach-dir t))
-	 (files (org-attach-file-list attach-dir))
-	 (file (if (= (length files) 1)
-		   (car files)
-		 (completing-read "Open attachment: "
-				  (mapcar #'list files) nil t)))
-         (path (expand-file-name file attach-dir)))
-    (org-attach-annex-get-maybe path)
-    (org-open-file path in-emacs)))
+  (let ((attach-dir (org-attach-dir)))
+    (if attach-dir
+	(let* ((file (pcase (org-attach-file-list attach-dir)
+		       (`(,file) file)
+		       (files (completing-read "Open attachment: "
+					       (mapcar #'list files) nil t))))
+	       (path (expand-file-name file attach-dir)))
+	  (run-hook-with-args 'org-attach-open-hook path)
+	  (org-open-file path in-emacs))
+      (error "No attachment directory exist"))))
 
 (defun org-attach-open-in-emacs ()
   "Open attachment, force opening in Emacs.
@@ -617,6 +607,69 @@ Basically, this adds the path to the attachment directory, and a \"file:\"
 prefix."
   (concat "file:" (org-attach-expand file)))
 
+(org-link-set-parameters "attachment"
+                         :follow #'org-attach-open-link
+                         :export #'org-attach-export-link
+                         :complete #'org-attach-complete-link)
+
+(defun org-attach-open-link (link &optional in-emacs)
+  "Attachment link type LINK is expanded with the attached directory and opened.
+
+With optional prefix argument IN-EMACS, Emacs will visit the file.
+With a double \\[universal-argument] \\[universal-argument] \
+prefix arg, Org tries to avoid opening in Emacs
+and to use an external application to visit the file."
+  (interactive "P")
+  (let (line search)
+    (cond
+     ((string-match "::\\([0-9]+\\)\\'" link)
+      (setq line (string-to-number (match-string 1 link))
+	    link (substring link 0 (match-beginning 0))))
+     ((string-match "::\\(.+\\)\\'" link)
+      (setq search (match-string 1 link)
+            link (substring link 0 (match-beginning 0)))))
+    (if (string-match "[*?{]" (file-name-nondirectory link))
+        (dired (org-attach-expand link))
+      (org-open-file (org-attach-expand link) in-emacs line search))))
+
+(defun org-attach-complete-link ()
+  "Advise the user with the available files in the attachment directory."
+  (let ((attach-dir (org-attach-dir)))
+    (if attach-dir
+	(let* ((attached-dir (expand-file-name attach-dir))
+	       (file (read-file-name "File: " attached-dir))
+	       (pwd (file-name-as-directory attached-dir))
+               (pwd-relative (file-name-as-directory
+			      (abbreviate-file-name attached-dir))))
+	  (cond
+	   ((string-match (concat "^" (regexp-quote pwd-relative) "\\(.+\\)") file)
+	    (concat "attachment:" (match-string 1 file)))
+	   ((string-match (concat "^" (regexp-quote pwd) "\\(.+\\)")
+			  (expand-file-name file))
+	    (concat "attachment:" (match-string 1 (expand-file-name file))))
+	   (t (concat "attachment:" file))))
+      (error "No attachment directory exist"))))
+
+(defun org-attach-export-link (link description format)
+  "Translate attachment LINK from Org mode format to exported FORMAT.
+Also includes the DESCRIPTION of the link in the export."
+  (save-excursion
+    (let (path desc)
+      (cond
+       ((string-match "::\\([0-9]+\\)\\'" link)
+        (setq link (substring link 0 (match-beginning 0))))
+       ((string-match "::\\(.+\\)\\'" link)
+        (setq link (substring link 0 (match-beginning 0)))))
+      (setq path (file-relative-name (org-attach-expand link))
+            desc (or description link))
+      (pcase format
+        (`html (format "<a target=\"_blank\" href=\"%s\">%s</a>" path desc))
+        (`latex (format "\\href{%s}{%s}" path desc))
+        (`texinfo (format "@uref{%s,%s}" path desc))
+        (`ascii (format "%s (%s)" desc path))
+        (`md (format "[%s](%s)" desc path))
+        (_ path)))))
+
 (defun org-attach-archive-delete-maybe ()
   "Maybe delete subtree attachments when archiving.
 This function is called by `org-archive-hook'.  The option
@@ -644,7 +697,7 @@ Idea taken from `gnus-dired-attach'."
   (interactive
    (list (dired-get-marked-files)))
   (unless (eq major-mode 'dired-mode)
-    (user-error "This command must be triggered in a dired buffer."))
+    (user-error "This command must be triggered in a dired buffer"))
   (let ((start-win (selected-window))
         (other-win
          (get-window-with-predicate

lisp/org-compat.el

@@ -263,6 +263,9 @@ Counting starts at 1."
 (define-obsolete-function-alias 'org-remove-latex-fragment-image-overlays
   'org-clear-latex-preview "Org 9.3")
 
+(define-obsolete-variable-alias 'org-attach-directory
+  'org-attach-id-dir "Org 9.3")
+
 (defun org-in-fixed-width-region-p ()
   "Non-nil if point in a fixed-width region."
   (save-match-data

lisp/org.el

@@ -3847,7 +3847,9 @@ This is needed for font-lock setup.")
 		  (beg end))
 (declare-function org-agenda-set-restriction-lock "org-agenda" (&optional type))
 (declare-function org-agenda-skip "org-agenda" ())
-(declare-function org-attach-reveal "org-attach" (&optional if-exists))
+(declare-function org-attach-expand "org-attach" (file))
+(declare-function org-attach-reveal "org-attach" ())
+(declare-function org-attach-reveal-in-emacs "org-attach" ())
 (declare-function org-gnus-follow-link "org-gnus" (&optional group article))
 (declare-function org-indent-mode "org-indent" (&optional arg))
 (declare-function org-inlinetask-goto-beginning "org-inlinetask" ())
@@ -8645,12 +8647,15 @@ a link."
 	  (pcase (org-offer-links-in-entry (current-buffer) (point) arg)
 	    (`(nil . ,_)
 	     (require 'org-attach)
-	     (org-attach-reveal 'if-exists))
+	     (message "Opening attachment-dir")
+	     (if (equal arg '(4))
+		 (org-attach-reveal-in-emacs)
+	       (org-attach-reveal)))
 	    (`(,links . ,links-end)
 	     (dolist (link (if (stringp links) (list links) links))
 	       (search-forward link nil links-end)
 	       (goto-char (match-beginning 0))
-	       (org-open-at-point))))))
+	       (org-open-at-point arg))))))
        ;; On a footnote reference or at definition's label.
        ((or (eq type 'footnote-reference)
 	    (and (eq type 'footnote-definition)
@@ -16630,13 +16635,14 @@ boundaries."
 	     ;; "file:" links.  Also check link abbreviations since
 	     ;; some might expand to "file" links.
 	     (file-types-re
-	      (format "\\[\\[\\(?:file%s:\\|[./~]\\)\\|\\]\\[\\(<?file:\\)"
+	      (format "\\[\\[\\(?:file%s:\\|attachment:\\|[./~]\\)\\|\\]\\[\\(<?file:\\)"
 		      (if (not link-abbrevs) ""
 			(concat "\\|" (regexp-opt link-abbrevs))))))
 	(while (re-search-forward file-types-re end t)
 	  (let* ((link (org-element-lineage
 			(save-match-data (org-element-context))
 			'(link) t))
+                 (linktype (org-element-property :type link))
 		 (inner-start (match-beginning 1))
 		 (path
 		  (cond
@@ -16650,7 +16656,8 @@ boundaries."
 		   ;; INCLUDE-LINKED is non-nil.
 		   ((or (not (org-element-property :contents-begin link))
 			include-linked)
-		    (and (equal "file" (org-element-property :type link))
+		    (and (or (equal "file" linktype)
+                             (equal "attachment" linktype))
 			 (org-element-property :path link)))
 		   ;; Link with a description.  Check if description
 		   ;; is a filename.  Even if Org doesn't have syntax
@@ -16669,7 +16676,11 @@ boundaries."
 			      (match-end 0))
 			   (match-string 2)))))))
 	    (when (and path (string-match-p file-extension-re path))
-	      (let ((file (expand-file-name path)))
+	      (let ((file (if (equal "attachment" linktype)
+                              (progn
+                                (require 'org-attach)
+                                (org-attach-expand path))
+                            (expand-file-name path))))
 		(when (file-exists-p file)
 		  (let ((width
 			 ;; Apply `org-image-actual-width' specifications.

lisp/ox-html.el

@@ -884,6 +884,7 @@ link to the image."
 
 (defcustom org-html-inline-image-rules
   '(("file" . "\\.\\(jpeg\\|jpg\\|png\\|gif\\|svg\\)\\'")
+    ("attachment" . "\\.\\(jpeg\\|jpg\\|png\\|gif\\|svg\\)\\'")
     ("http" . "\\.\\(jpeg\\|jpg\\|png\\|gif\\|svg\\)\\'")
     ("https" . "\\.\\(jpeg\\|jpg\\|png\\|gif\\|svg\\)\\'"))
   "Rules characterizing image files that can be inlined into HTML.

testing/examples/att1/fileA

@@ -0,0 +1 @@
+Text in fileA

testing/examples/att1/fileB

@@ -0,0 +1 @@
+Text in fileB

testing/examples/att2/fileC

@@ -0,0 +1 @@
+Text in fileC

testing/examples/att2/fileD

@@ -0,0 +1 @@
+text in fileD

testing/examples/attachments.org

@@ -0,0 +1,32 @@
+#+TITLE: Org attach testfile
+Used to test and verify the functionality of org-attach.
+
+* H1
+ :PROPERTIES:
+ :DIR:      att1
+ :END:
+A link to one attachment: [[attachment:fileA]]
+
+** H1.1
+A link to another attachment: [[attachment:fileB]]
+
+** H1.2
+  :PROPERTIES:
+  :DIR:      att2
+  :END:
+
+* H2
+ :PROPERTIES:
+ :ID:       abcd123
+ :END:
+
+* H3
+ :PROPERTIES:
+ :DIR:      att1
+ :ID:       abcd1234
+ :END:
+
+** H3.1
+  :PROPERTIES:
+  :ID:       abcd12345
+  :END:

testing/examples/data/ab/cd123/fileE

@@ -0,0 +1 @@
+peek-a-boo

testing/lisp/test-org-attach-annex.el → testing/lisp/test-org-attach-git.el

@@ -20,19 +20,19 @@
 
 ;;; Code:
 (org-test-for-executable "git-annex")
-(require 'org-attach)
+(require 'org-attach-git)
 (require 'cl-lib)
 
-(defmacro test-org-attach-annex/with-annex (&rest body)
+(defmacro test-org-attach-git/with-annex (&rest body)
   `(let ((tmpdir (make-temp-file "org-annex-test" t "/")))
      (unwind-protect
 	 (let ((default-directory tmpdir)
-	       (org-attach-directory tmpdir))
+	       (org-attach-id-dir tmpdir))
 	   (shell-command "git init")
 	   (shell-command "git annex init")
 	   ,@body))))
 
-(ert-deftest test-org-attach/use-annex ()
+(ert-deftest test-org-attach-git/use-annex ()
   (test-org-attach-annex/with-annex
    (let ((org-attach-git-annex-cutoff 1))
      (should (org-attach-use-annex)))
@@ -44,12 +44,12 @@
   (let ((tmpdir (make-temp-file "org-annex-test" t "/")))
      (unwind-protect
 	 (let ((default-directory tmpdir)
-	       (org-attach-directory tmpdir))
+	       (org-attach-id-dir tmpdir))
 	   (shell-command "git init")
 	   (should-not (org-attach-use-annex)))
        (delete-directory tmpdir 'recursive))))
 
-(ert-deftest test-org-attach/get-maybe ()
+(ert-deftest test-org-attach-git/get-maybe ()
   (test-org-attach-annex/with-annex
    (let ((path (expand-file-name "test-file"))
 	 (annex-dup (make-temp-file "org-annex-test" t "/")))

testing/lisp/test-org-attach.el

@@ -28,6 +28,75 @@
 (require 'org-attach)
 (eval-and-compile (require 'cl-lib))
 
+(ert-deftest test-org-attach/dir ()
+  "Test `org-attach-get' specifications."
+  (should (equal "Text in fileA\n"
+		 (org-test-in-example-file org-test-attachments-file
+		   (goto-char 157) ;; First attachment link
+		   (org-open-at-point)
+		   (buffer-string))))
+  (should-not (equal "Text in fileB\n"
+		     (org-test-in-example-file org-test-attachments-file
+		       (goto-char 219) ;; Second attachment link
+		       (let ((org-attach-use-inheritance nil))
+			 (org-open-at-point)
+			 (buffer-string)))))
+  (should (equal "Text in fileB\n"
+		 (org-test-in-example-file org-test-attachments-file
+		   (goto-char 219) ;; Second attachment link
+		   (let ((org-attach-use-inheritance t))
+		     (org-open-at-point)
+		     (buffer-string)))))
+  (should-not (equal "att1"
+		     (org-test-in-example-file org-test-attachments-file
+		       (goto-char 179) ;; H1.1
+		       (let ((org-attach-use-inheritance nil))
+			 (org-attach-dir)))))
+  (should (equal "att1"
+		 (org-test-in-example-file org-test-attachments-file
+		   (goto-char 179) ;; H1.1
+		   (let ((org-attach-use-inheritance t))
+		     (org-attach-dir)))))
+  (should (equal '("fileC" "fileD")
+		 (org-test-in-example-file org-test-attachments-file
+		   (goto-char 239) ;; H1.2
+		   (org-attach-file-list (org-attach-dir)))))
+  (should (equal '("fileC" "fileD")
+		 (org-test-in-example-file org-test-attachments-file
+		   (goto-char 239) ;; H1.2
+		   (org-attach-file-list (org-attach-dir)))))
+  (should (equal '("fileE")
+		 (org-test-in-example-file org-test-attachments-file
+		   (goto-char 289) ;; H2
+		   (let ((org-attach-id-dir "data/"))
+		     (org-attach-file-list (org-attach-dir))))))
+  (should (equal "peek-a-boo\n"
+		 (org-test-in-example-file org-test-attachments-file
+		   (goto-char 289) ;; H2
+		   (let ((org-attach-id-dir "data/"))
+		     (org-attach-open-in-emacs)
+		     (buffer-string)))))
+  (should (equal  '("fileA" "fileB")
+		  (org-test-in-example-file org-test-attachments-file
+		    (goto-char 336) ;; H3
+		    (org-attach-file-list (org-attach-dir)))))
+  (should (equal "data/ab/cd12345"
+		 (org-test-in-example-file org-test-attachments-file
+		   (goto-char 401) ;; H3.1
+		   (let ((org-attach-use-inheritance nil)
+			 (org-attach-id-dir "data/"))
+		     (file-relative-name (org-attach-dir))))))
+  (should (equal '("fileA" "fileB")
+		 (org-test-in-example-file org-test-attachments-file
+		   (goto-char 401) ;; H3.1
+		   (let ((org-attach-use-inheritance t))
+		     ;; This is where it get's a bit sketchy...! DIR always has
+		     ;; priority over ID, even if ID is declared "higher up" in the
+		     ;; tree.  This can potentially be revised.  But it is also
+		     ;; pretty clean.  DIR is always higher in priority than ID right
+		     ;; now, no matter the depth in the tree.
+		     (org-attach-file-list (org-attach-dir)))))))
+
 (ert-deftest test-org-attach/dired-attach-to-next-best-subtree/1 ()
   "Attach file at point in dired to subtree."
   (should

testing/lisp/test-org.el

@@ -2514,7 +2514,11 @@ Foo Bar
      (catch :result
        (cl-letf (((symbol-function 'org-tags-view)
 		  (lambda (&rest args) (throw :result t))))
-	 (org-open-at-point)
+	 ;; When point isn't on a tag it's going to try other things,
+	 ;; possibly trying to open attachments which will return an
+	 ;; error if there isn't an attachment. Supress that error.
+	 (ignore-errors
+	     (org-open-at-point))
 	 nil)))))
 
 

testing/org-test.el

@@ -87,6 +87,9 @@ org-test searches this directory up the directory tree.")
 (defconst org-test-no-heading-file
   (expand-file-name "no-heading.org" org-test-example-dir))
 
+(defconst org-test-attachments-file
+  (expand-file-name "attachments.org" org-test-example-dir))
+
 (defconst org-test-link-in-heading-file
   (expand-file-name "link-in-heading.org" org-test-dir))