Re: Synchronizing or merging undo across platforms

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?

#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

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