Re: Changing location of swap directory for selected files, how to?

On Thu, Sep 13, 2012 at 12:02 AM, Ben Fritz <fritzophrenic@gmail.com> wrote:
> On Wednesday, September 12, 2012 10:03:09 AM UTC-5, Ben Fritz wrote:
>> On Wednesday, September 12, 2012 8:22:44 AM UTC-5, Karthick wrote:
>>
>> > Hello,
>> > I would like to modify the value of 'dir' option for a few specific
>> > files (e.g: all files in directory ~/Foo/). Had 'dir' been a buffer
>> > local option, it would have been a easy thing,
>> One workaround might be to set 'noswapfile' globally in your .vimrc, and set 'swapfile' locally on BufEnter, after setting the correct 'dir' option.
>
> I have some slow network shares, so I gave this idea a try to prevent using them for swap files. It seems successful so far, but beware of the crash I observed here: https://groups.google.com/d/topic/vim_dev/ZcJEKqNsVRI/discussion
>
> Here's the code I came up with:
>
> " Make slow network shares on Windows prefer not to use the file's directory
> " for swap files
> if has('win32')
> set noswapfile
> autocmd BufReadPre * setlocal noswapfile
> autocmd BufEnter {Z,U,W}:{/,\\}* set dir-=. dir+=.
> " nested autocmd to enable swap files so SwapExists autocmds fire, too
> autocmd BufEnter * nested setlocal swapfile
> autocmd BufLeave {Z,U,W}:{/,\\}* set dir-=. dir^=.
> endif
I think the basic assumption here is BufReadPre triggers execute
before swap file is created?

I tried to validate that with the following:

au BufReadPre TEMPTST call Check()
function Check()
sleep 10
endfunction

:e TEMPTST
<type some chars>
" Now delete the buffer
:bd

" Reload buffer to test the autocmd
:e TEMPTST
BufReadPre will now trigger. I was monitoring the directory (in a file
explorer) and saw a swap file being created before the Check()
function returns.

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