[RFC] Added an option to store content of the *scratch* buffer in a file.

[RFC] Added an option to store content of the *scratch* buffer in a file.

[Michal Nazarewicz]

From: Michal Nazarewicz <mina86@mina86.com>

* lisp/startup.el (initial-scratch-message): Now accepts additional
'file value.
(scratch-recover-from-auto-save-file): New customize variable
describing behaviour of scratch auto-save file.
(scratch--custom-set): New helper function, used as a :set argument
for the above two variables.
(scratch--initialise, scratch--set-buffer-variables)
(scratch--insert-content, scratch--bury-on-kill-buffer): New functions
which initialise content of the *scratch* buffer.
(command-line-1): Use scratch--initialise function.
---
 Hi guys,

 I've been using this functionality for years now and, in my opinion,
 it's absolutely awesome.  It makes *scratch* to extremely useful
 buffer indeed!

 I haven't tested this patch extensively yet (since I've been using
 a simpler version of the code[1]), so at this point I'm just asking
 for feedback.  If you guys are interested in this, I'll test the code
 properly and send another version at later date.

 PS. I hope you don't mind I'm using git to send the patch.

 [1] https://github.com/mina86/dot-files/blob/master/dot-emacs#L1727

 etc/NEWS        |   4 ++
 lisp/ChangeLog  |  16 +++++++
 lisp/startup.el | 140 +++++++++++++++++++++++++++++++++++++++++++++++++-------
 3 files changed, 144 insertions(+), 16 deletions(-)

diff --git a/etc/NEWS b/etc/NEWS
index c493e34..ac8ab80 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -87,6 +87,10 @@ simply disabling Transient Mark mode does the same thing.
 ** `initial-buffer-choice' can now specify a function to set up the
 initial buffer.
 
+** `initial-scratch-message' can now be 'file which makes content of
+the *scratch* buffer to be kept in a file.  This makes it possible to
+keep notes which will persist even when Emacs restarts in that buffer.
+
 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
 
 ** ACL support has been added.
diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 0d1e65c..949922b 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,19 @@
+2013-06-05  Michal Nazarewicz  <mina86@mina86.com>
+
+	Added an option to store content of the *scratch* buffer in a file
+	in user-emacs-directory.  This makes it possible to keep notes
+	which will persist even when Emacs restarts in that buffer.
+	* startup.el (initial-scratch-message): Now accepts additional
+	'file value.
+	(scratch-recover-from-auto-save-file): New customize variable
+	describing behaviour of scratch auto-save file.
+	(scratch--custom-set): New helper function, used as a :set argument
+	for the above two variables.
+	(scratch--initialise, scratch--set-buffer-variables)
+	(scratch--insert-content, scratch--bury-on-kill-buffer): New functions
+	which initialise content of the *scratch* buffer.
+	(command-line-1): Use scratch--initialise function.
+
 2013-06-05  Teodor Zlatanov  <tzz@lifelogs.com>
 
 	* net/tls.el (open-tls-stream): Remove unneeded buffer contents up
diff --git a/lisp/startup.el b/lisp/startup.el
index b7b4c15..7105a80 100644
--- a/lisp/startup.el
+++ b/lisp/startup.el
@@ -1288,18 +1288,45 @@ settings will be marked as \"CHANGED outside of Customize\"."
 	   `((changed ((t :background ,color)))))
       (put 'cursor 'face-modified t))))
 
+(defun scratch--custom-set (symbol value)
+  (set-default symbol value)
+  ;; This function is called by defcustom so
+  ;; set-scratch-buffer-variables may be unbound yet.
+  (when (fboundp 'set-scratch-buffer-variables)
+    (set-scratch-buffer-variables)))
+
 (defcustom initial-scratch-message (purecopy "\
 ;; This buffer is for notes you don't want to save, and for Lisp evaluation.
 ;; If you want to create a file, visit that file with C-x C-f,
 ;; then enter the text in that file's own buffer.
 
 ")
-  "Initial message displayed in *scratch* buffer at startup.
-If this is nil, no message will be displayed."
+  "Initial message displayed in `*scratch*' buffer at startup.  If this is nil,
+no message will be displayed.  If this is symbol 'file content of the buffer
+will be read from a \"scratch\" file in `user-emacs-directory' and saved there
+when Emacs exists preserving it across restarts.
+
+As side effect of setting this to 'file, `*scratch*' buffer becomes immortal,
+ie. killing it will merely clear its content and bury it.
+
+When set via customize, various `*scratch*' buffer's local variables are
+modified by calling `set-scratch-buffer-variables' function."
   :type '(choice (text :tag "Message")
-		 (const :tag "none" nil))
+		 (const :tag "Read from scratch file" file)
+		 (const :tag "None" nil))
+  :set 'scratch--custom-set
   :group 'initialization)
 
+(defcustom scratch-recover-from-auto-save-file 'ask
+  "What to do if scratch autosave file is newer than the scratch file.
+
+When set via customize, various `*scratch*' buffer's local variables are
+modified by calling `set-scratch-buffer-variables' function."
+  :type '(choice (const :tag "Always recover auto-save" t)
+		 (const :tag "Never recover auto-save" nil)
+		 (const :tag "Ask whether to recover auto-save" ask))
+  :set 'scratch--custom-set
+  :group 'initialization)
 \f
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;; Fancy splash screen
@@ -2292,19 +2319,7 @@ A fancy display is used on graphic displays, normal otherwise."
 	    ;; abort later.
 	    (unless (frame-live-p (selected-frame)) (kill-emacs nil))))))
 
-    (when (eq initial-buffer-choice t)
-      ;; When initial-buffer-choice equals t make sure that *scratch*
-      ;; exists.
-      (get-buffer-create "*scratch*"))
-
-    ;; If *scratch* exists and is empty, insert initial-scratch-message.
-    ;; Do this before switching to *scratch* below to handle bug#9605.
-    (and initial-scratch-message
-	 (get-buffer "*scratch*")
-	 (with-current-buffer "*scratch*"
-	   (when (zerop (buffer-size))
-	     (insert initial-scratch-message)
-	     (set-buffer-modified-p nil))))
+    (scratch--initialise)
 
     (when initial-buffer-choice
       (let ((buf
@@ -2383,4 +2398,97 @@ A fancy display is used on graphic displays, normal otherwise."
 	(setq file (replace-match "/" t t file))))
     file))
 
+(defun scratch--initialise ()
+  "Initialises the *scratch* buffer.
+
+If `initial-buffer-choice' variable equals t *scratch* buffer will be created
+if it does not exist.  If it is empty its content will be populated depending
+on the `initial-scratch-message' variable.  (So if it's nil, the buffer will
+be left empty).
+
+Finally, hooks will be added which are affect the *scratch* buffer if
+`initial-scratch-message' variable equals 'file.  One will make the buffer
+immortal by burying it on kill, the other will save its content when Emacs
+exits."
+    (let ((buf (if (eq initial-buffer-choice t)
+		   (get-buffer-create "*scratch*")
+		 (get-buffer "*scratch*"))))
+      (and buf
+	   initial-scratch-message
+	   (with-current-buffer buf
+	     (when (zerop (buffer-size))
+	       (scratch--insert-content)
+	       (set-buffer-modified-p nil))))))
+
+(defconst scratch--initial-file-message (purecopy "\
+;; This buffer is for notes and for Lisp evaluation.
+;; If you want to create a file, visit that file with C-x C-f,
+;; then enter the text in that file's own buffer.
+;; Contents of this buffer will be saved across restarts.
+
+"))
+
+(defun scratch--set-buffer-variables ()
+  (if (eq initial-scratch-message 'file)
+      (progn
+	(setq buffer-file-name (concat user-emacs-directory "scratch")
+	      buffer-save-without-query t)
+	(auto-save-mode (if scratch-recover-from-auto-save-file 1 -1))
+	(add-hook 'kill-buffer-query-functions 'scratch--bury-on-kill-buffer
+		  nil t))
+    (auto-save-mode -1)
+    (kill-local-variable 'buffer-file-name)
+    (kill-local-variable 'buffer-save-without-query)
+    (remove-hook 'kill-buffer-query-functions 'scratch--bury-on-kill-buffer)))
+
+(defun set-scratch-buffer-variables ()
+  "Sets `*sctrach*' local buffer variables based on customize options.
+
+If `*scratch*' buffer does not exist, this function does nothing.  Otherwise
+the following is affected:
+- `buffer-file-name' and `buffer-save-without-query' local variables,
+- `auto-save-mode', and
+- `kill-buffer-query-functions'."
+  (let ((buf (get-buffer "*scratch*")))
+    (when buf
+      (with-current-buffer buf
+	(stratch--set-buffer-variables)))))
+
+(defun scratch--insert-content ()
+  (if (not (eq initial-scratch-message 'file))
+      (insert initial-scratch-message)
+    (scratch--set-buffer-variables)
+    (let* ((have-file (file-readable-p buffer-file-name))
+	   (have-auto-save (and buffer-auto-save-file-name
+				(file-readable-p buffer-auto-save-file-name))))
+      ;; If autosave is older, pretend it does not exist.
+      (and have-file
+	   have-auto-save
+	   (not (file-newer-than-file-p buffer-auto-save-file-name
+					buffer-file-name))
+	   (setq have-auto-save nil))
+      ;; If user wants us to always recover, pretend there's no base file.
+      (and have-auto-save
+	   (eq t scratch-recover-from-auto-save-file)
+	   (setq have-file nil))
+      ;; Ask user what to do.
+      (and have-file
+	   have-auto-save
+	   (if (y-or-n-p "Recover scratch file? ")
+	       (setq have-file nil)
+	     (setq have-auto-save nil)))
+      (let ((file (cond (have-file buffer-file-name)
+			(have-auto-save buffer-auto-save-file-name))))
+	(if file
+	    (insert-file-contents file nil nil nil t)
+	  (insert scratch--initial-file-message))))))
+
+(defun scratch--bury-on-kill-buffer ()
+  (not (when (and (eq 'file initial-scratch-message)
+		  (string-equal (buffer-name (current-buffer)) "*scratch*"))
+	 (erase-buffer)
+	 (set-buffer-modified-p nil)
+	 (bury-buffer)
+	 t)))
+
 ;;; startup.el ends here
-- 
1.8.3

Re: [RFC] Added an option to store content of the *scratch* buffer in a file.

[Ted Zlatanov]

On Wed,  5 Jun 2013 23:00:40 +0200 Michal Nazarewicz <mpn@google.com> wrote: 

MN>  I've been using this functionality for years now and, in my opinion,
MN>  it's absolutely awesome.  It makes *scratch* to extremely useful
MN>  buffer indeed!

MN>  I haven't tested this patch extensively yet (since I've been using
MN>  a simpler version of the code[1]), so at this point I'm just asking
MN>  for feedback.  If you guys are interested in this, I'll test the code
MN>  properly and send another version at later date.

I like it!

I would make the parameter accept a string (a file name) instead of
'file:

nil => old default behavior
t => concat(emacs-directory "scratch")
"filename" => use that file

That way I can save my scratch buffer in a custom directory (something
available over the network for instance).

MN>  PS. I hope you don't mind I'm using git to send the patch.

It's readable for me.

Ted

Re: [RFC] Added an option to store content of the *scratch* buffer in a file.

[Michal Nazarewicz]

> On Wed,  5 Jun 2013 23:00:40 +0200 Michal Nazarewicz <mpn@google.com> 
wrote: 
> MN>  I've been using this functionality for years now and, in my opinion,
> MN>  it's absolutely awesome.  It makes *scratch* to extremely useful
> MN>  buffer indeed!

Ted Zlatanov <tzz <at> lifelogs.com> writes:
> I like it!
> 
> I would make the parameter accept a string (a file name) instead of
> 'file:
> 
> nil => old default behavior
> t => concat(emacs-directory "scratch")
> "filename" => use that file
> 
> That way I can save my scratch buffer in a custom directory (something
> available over the network for instance).

It is doable except probably with a new variable.  initial-scratch-message
already accepts string as value which means to insert that string to the
*scratch* buffer, so it cannot be reused as a file name.  Of course,
a list could be used to indicate file, eg.:

(null initial-scratch-message)
    ⇒ don't do anything with *scratch* (old behaviour)
(stringp  initial-scratch-message)
    ⇒ insert the string to *scratch* (old behaviour)
(listp initial-scratch-message)
    ⇒ insert content of (car initial-scratch-message) (new behaviour)

I'm not entirely convinced that's user-friendly though so alternatively
a new scratch-file-name defcustom could be added.

Re: [RFC] Added an option to store content of the *scratch* buffer in a file.

[Glenn Morris]

Michal Nazarewicz wrote:

> +** `initial-scratch-message' can now be 'file which makes content of
> +the *scratch* buffer to be kept in a file.  This makes it possible to
> +keep notes which will persist even when Emacs restarts in that buffer.

Seems like a bad UI to (ab)use initial-scratch-message for this.
Also, it's not really a scratch buffer if it gets saved, is it?
Maybe extending `initial-buffer-choice' would be better?

> +(defun scratch--custom-set (symbol value)
> +  (set-default symbol value)
> +  ;; This function is called by defcustom so
> +  ;; set-scratch-buffer-variables may be unbound yet.
> +  (when (fboundp 'set-scratch-buffer-variables)
> +    (set-scratch-buffer-variables)))

Probably you don't need that dance if you use:

:set 'scratch--custom-set
:initialize: 'custom-initialize-default

Re: [RFC] Added an option to store content of the *scratch* buffer in a file.

[Ted Zlatanov]

On Fri, 7 Jun 2013 17:37:42 +0000 (UTC) Michal Nazarewicz <mina86@mina86.com> wrote: 

MN> I'm not entirely convinced that's user-friendly though so alternatively
MN> a new scratch-file-name defcustom could be added.

I would make a new defcustom :)  I didn't think about the existing
string option.

Ted

Re: [RFC] Added an option to store content of the *scratch* buffer in a file.

[Michal Nazarewicz]

On Fri, Jun 07 2013, Glenn Morris wrote:
> Michal Nazarewicz wrote:
>> +** `initial-scratch-message' can now be 'file which makes content of
>> +the *scratch* buffer to be kept in a file.  This makes it possible to
>> +keep notes which will persist even when Emacs restarts in that buffer.
>
> Seems like a bad UI to (ab)use initial-scratch-message for this.
> Also, it's not really a scratch buffer if it gets saved, is it?
> Maybe extending `initial-buffer-choice' would be better?

How does the below look like:

-------------------- >8 --------------------------------------------------------
Subject: [PATCH] Add `notes' function to store random notes across Emacs
 restarts.

You may think of it as a *scratch* buffer whose content is preserved.
In fact, it was designed as a replacement for *scratch* buffer and can
be used that way by setting `initial-buffer-choice' to 'notes an
`notes-buffer-name' to "*scratch*".  Without the second
change, *scratch* buffer will still be there for notes that do not
need to be preserved.

* list/startup.el (notes): New function creating notes buffer.
(notes-file, notes-recover-from-auto-save-file, notes-buffer-name)
(initial-notes-major-mode): New customize variables for customizing
behaviour of the notes buffer.
(notes--bury-on-kill-buffer, notes--insert-content): New helper
functions for `notes' function.
(notes--buffer): New helper variable for `notes' function.
(notes--initial-message): New helper constant for `notes' function.
---
 etc/NEWS        |   8 +++
 lisp/ChangeLog  |  12 +++++
 lisp/startup.el | 147 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 166 insertions(+), 1 deletion(-)

diff --git a/etc/NEWS b/etc/NEWS
index 380c934..16e8943 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -87,6 +87,14 @@ simply disabling Transient Mark mode does the same thing.
 ** `initial-buffer-choice' can now specify a function to set up the
 initial buffer.
 
+** `notes' function creates a buffer whose content is saved on kill-emacs.
+You may think of it as a *scratch* buffer whose content is preserved.
+In fact, it was designed as a replacement for *scratch* buffer and can
+be used that way by setting `initial-buffer-choice' to 'notes an
+`notes-buffer-name' to "*scratch*".  Without the second
+change, *scratch* buffer will still be there for notes that do not
+need to be preserved.
+
 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
 
 ** ACL support has been added.
diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 665e656..b7d87a1 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,15 @@
+2013-06-08  Michal Nazarewicz  <mina86@mina86.com>
+
+	Add `notes' function to store random notes across Emacs restarts.
+	* list/startup.el (notes): New function creating notes buffer.
+	(notes-file, notes-recover-from-auto-save-file, notes-buffer-name)
+	(initial-notes-major-mode): New customize variables for customizing
+	behaviour of the notes buffer.
+	(notes--bury-on-kill-buffer, notes--insert-content): New helper
+	functions for `notes' function.
+	(notes--buffer): New helper variable for `notes' function.
+	(notes--initial-message): New helper constant for `notes' function.
+
 2013-06-07  Leo Liu  <sdl.web@gmail.com>
 
 	* progmodes/octave.el (octave-mode): Set comment-use-global-state
diff --git a/lisp/startup.el b/lisp/startup.el
index b7b4c15..7d7c2da 100644
--- a/lisp/startup.el
+++ b/lisp/startup.el
@@ -53,7 +53,8 @@ or directory when no target file is specified."
 	  (const     :tag "Startup screen" nil)
 	  (directory :tag "Directory" :value "~/")
 	  (file      :tag "File" :value "~/.emacs")
-          (function  :tag "Function")
+	  (const     :tag "Notes buffer" notes)
+	  (function  :tag "Function")
 	  (const     :tag "Lisp scratch buffer" t))
   :version "24.4"
   :group 'initialization)
@@ -2383,4 +2384,148 @@ A fancy display is used on graphic displays, normal otherwise."
 	(setq file (replace-match "/" t t file))))
     file))
 
+\f
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;; Notes which are preserved across restarts
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(defvar notes--buffer nil
+  "The notes buffer.")
+
+
+(defcustom notes-file (concat user-emacs-directory "notes")
+  "File to save notes in.
+When set via customize `buffer-file-name' variable of the notes buffer
+\(if it exists) will be changed."
+  :type 'string
+  :set (lambda (symbol value)
+	 (set-default symbol value)
+	 (when (buffer-live-p notes--buffer)
+	   (with-current-buffer notes--buffer
+	     (setq buffer-file-name value))))
+  :group 'initialization)
+
+(defcustom notes-recover-from-auto-save-file 'ask
+  "What to do if notes autosave file is newer than the notes file.
+
+t means to always recover content from auto-save file, 'ask means
+to ask user, and nil means never to recover auto-save file (which
+also disables `auto-save-mode' in the notes buffer.
+
+When set via customize, `auto-save-mode' will be enabled or disabled
+in the notes buffer according to this variable's value."
+  :type '(choice (const :tag "Always recover auto-save" t)
+                 (const :tag "Never recover auto-save" nil)
+                 (const :tag "Ask whether to recover auto-save" ask))
+  :set (lambda (symbol value)
+	 (set-default symbol value)
+	 (when (buffer-live-p notes--buffer)
+	   (with-current-buffer notes--buffer
+	     (auto-save-mode (if value 1 -1)))))
+  :group 'initialization)
+
+(defcustom notes-buffer-name "*notes*"
+  "Name of the notes buffer.
+Setting it to *scratch* will hijack the *scratch* buffer for the
+purpose of storing notes."
+  :type 'string
+  :group 'initialization)
+
+(defcustom initial-notes-major-mode t
+  "Major mode to set to notes buffer when it's created.
+If set to t will use the same mode as `initial-major-mode'."
+  :type '(choice (const    :tag "Same as `initial-major-mode'" t)
+		 (function :tag "Major mode" text-mode)))
+
+(defcustom bury-notes-on-kill t
+  "Whether to bury notes buffer instead of killing."
+  :type 'boolean)
+
+(defconst notes--initial-message (purecopy "\
+;; This buffer is for notes and for Lisp evaluation.
+;; If you want to create a file, visit that file with C-x C-f,
+;; then enter the text in that file's own buffer.
+;; Contents of this buffer will be saved across restarts.
+
+"))
+
+
+(defun notes ()
+  "Creates notes buffer and switches to it if called interactively.
+
+Name of the created buffer is taken from `notes-buffer-name' variable
+and if buffer with that name already exist (but was not created by
+`notes' function)), its content will be overwritten.  Returns notes
+buffer.
+
+Notes buffer is meant for keeping random notes which you'd like to
+preserve across Emacs restarts."
+  (interactive)
+  (unless (buffer-live-p notes--buffer)
+    (setq notes--buffer (get-buffer-create notes-buffer-name))
+    (with-current-buffer notes--buffer
+      (funcall (if (eq initial-notes-major-mode t)
+		   initial-major-mode
+		 initial-notes-major-mode))
+      (setq buffer-file-name notes-file
+	    buffer-save-without-query t)
+      (auto-save-mode (if notes-recover-from-auto-save-file 1 -1))
+      ;; We don't want a "Buffer modified" prompt from kill-buffer so
+      ;; we have to use advice rather than a hook.
+      (advice-add 'kill-buffer :around 'notes--kill-buffer)
+      (notes--insert-content)))
+  (when (called-interactively-p 'all)
+    (switch-to-buffer notes--buffer))
+  notes--buffer)
+
+(defun notes--insert-content ()
+  (let* ((have-file (file-readable-p buffer-file-name))
+	 (have-auto-save (and buffer-auto-save-file-name
+			      (file-readable-p buffer-auto-save-file-name))))
+    ;; If autosave is older, pretend it does not exist.
+    (and have-file
+	 have-auto-save
+	 (not (file-newer-than-file-p buffer-auto-save-file-name
+				       buffer-file-name))
+	 (setq have-auto-save nil))
+    ;; If user wants us to always recover, pretend there's no base file.
+    (and have-auto-save
+	 (eq t notes-recover-from-auto-save-file)
+	 (setq have-file nil))
+    ;; Ask user what to do.
+    (and have-file
+	 have-auto-save
+	 (if (y-or-n-p "Recover notes file? ")
+	     (setq have-file nil)
+	   (setq have-auto-save nil)))
+    (let ((file (cond (have-file buffer-file-name)
+		      (have-auto-save buffer-auto-save-file-name))))
+      (cond (file
+	     (insert-file-contents file nil nil nil t)
+	     (set-buffer-modified-p nil))
+	    ((zerop (buffer-size))
+	     (insert notes--initial-message))
+            (t
+	     (set-buffer-modified-p t))))))
+
+(defun notes--kill-buffer (func &optional buffer)
+  (if (null notes--buffer)
+      (funcall func buffer)
+    (setq buffer (cond ((null    buffer) (current-buffer))
+		       ((stringp buffer) (get-buffer buffer))
+		       (buffer)))
+    (and (buffer-live-p buffer)
+	 (not (when (eq buffer notes--buffer)
+		(when (buffer-modified-p buffer)
+		  (with-current-buffer buffer
+		    (save-buffer)))
+		(when bury-notes-on-kill
+		  (bury-buffer (unless (eq buffer (current-buffer)) buffer))
+		  t)))
+	 (funcall func buffer)
+	 (progn
+	   (when (eq buffer notes--buffer)
+	     (setq notes--buffer nil))
+	   t))))
+
 ;;; startup.el ends here

Re: [RFC] Added an option to store content of the *scratch* buffer in a file.

[Stefan Monnier]

> * list/startup.el (notes): New function creating notes buffer.

I don't thing it belongs in a preloaded file.
It should be possible to simply provide an autoloaded function which
users can put on their initial-buffer-choice.


        Stefan

Re: [RFC] Added an option to store content of the *scratch* buffer in a file.

[Michal Nazarewicz]

[-- Attachment #1: Type: text/plain, Size: 733 bytes --]

On Sat, Jun 08 2013, Stefan Monnier wrote:
>> * list/startup.el (notes): New function creating notes buffer.
>
> I don't thing it belongs in a preloaded file.
> It should be possible to simply provide an autoloaded function which
> users can put on their initial-buffer-choice.

Agreed.  It was rather late when I submitted the patch, so I kept it in
startup.el, but I'll try to send a patch with it in a separate file
(notes.el?) by the end of the week.

-- 
Best regards,                                         _     _
.o. | Liege of Serenely Enlightened Majesty of      o' \,=./ `o
..o | Computer Science,  Michał “mina86” Nazarewicz    (o o)
ooo +----<email/xmpp: mpn@google.com>--------------ooO--(_)--Ooo--

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