Re: Synchronizing or merging undo across platforms

On 28/11/11 06:31, Christian Brabandt wrote:
> Hi Bram!
>
> On So, 27 Nov 2011, Bram Moolenaar wrote:
>
>>
>> Christian Brabandt wrote:
>>
>>> On Wed, November 16, 2011 9:38 pm, Paul wrote:
>>>> On Nov 16, 1:42 am, "Christian Brabandt"<cbli...@256bit.org> wrote:
>>>>
>>>>> Well, first check that
>>>>> :echo undofile(@%) points to the same undofile across each platform.
>>>>
>>>> Aha, thanks. That helped me determine that my Vim silently ignores me
>>>> when I try to set relative directories for undodir.
>>>>
>>>> :set undodir=. works fine, but no undo file is created when I :set
>>>> undodir=./undodir
>>>>
>>>> This seems to be a different behavior than that of backupdir, even
>>>> though :help undodir says "See |'backupdir'| for details of the
>>>> format." Is this expected/documented/fixable?
>>>
>>> Hm, setting 'undodir' to a relative directory works for me. I can't
>>> reproduce this. However there is a bug when using rundo with those
>>> files.
>>>
>>> When using a separate 'undodir' directory to store the undofiles, Vim
>>> uses the complete path of the file as filename, replacing the path
>>> separators ('/') by '%'. So far this works as documented by :h
>>> 'undodir'.
>>>
>>> Now when using :rundo with a filename, that contains the complete path
>>> and using '%' as directory separators, those '%' will be replaced by
>>> the current file name (as documented by :h filename-modifiers) and
>>> surprise surprise Vim won't be able to read the undofile.
>>>
>>> So this is just plain wrong in this case. So here is a patch, that
>>> fixes that. This applies only to :rundo and I am not sure, whether
>>> this should also apply to :wundo (I tend not to apply it there) but
>>> this should be kept in mind.
>>>
>>> Bram, please check and apply.
>>
>> In most places where you can use a file name % is expanded. And it's
>> also useful, especially in the form "%:h" to get the directory.
>
> I don't understand. Using '%' as path separators contradicts the usage
> your pointing out. How am I supposed to :rundo an undofile, that
> contains the '%'-separator?

The path separator is % in 'undodir' but / in the operand of :rundo (see
the examples under ":help :rundo").

>
> #v+
> ~$ mkdir -p /tmp/undo
> ~$ vim -u NONE -U NONE -N -i NONE -c ':set undodir=/tmp/undo|set
> undofile|exe "wundo" undofile(@%)|q' ~/.vimrc
> ~$ vim -u NONE -U NONE -N -i NONE -c ':set undodir=/tmp/undo|set
> undofile|exe "verbose rundo" undofile(@%)' ~/.vimrc
> "~/.vimrc" 438L, 13769C
> Reading undo file: /tmp/undo/.vimrchome.vimrcchrisbra.vimrc.vim.vimrcvimrc
> Fehler beim Ausführen von "command line":
> E822: Cannot open undo file for reading: /tmp/undo/.vimrchome.vimrcchrisbra.vim
> rc.vim.vimrcvimrc
> #v-
>
> regards,
> Christian
>

Best regards,
Tony.
--
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(4) Carefully guess the weight of the rocks.
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