Thursday, November 22, 2018

Re: Noswap and Nobackup when editing python on a specific device (mounted) on Linux

On 2018-11-23, Tony Mechelynck wrote:
> On Thu, Nov 22, 2018 at 9:21 PM Gary Johnson <garyjohn@spocom.com> wrote:
> >
> > On 2018-11-22, tuxic@posteo.de wrote:
> > > Hi,
> > >
> > > from time to time I have to edit a python file, which
> > > is stored on the 2M flash memory on a microcontroller
> > > board.
> > >
> > > To avoid unneccassary write cycles to the flash (flash wear out)
> > > I want to disable backup and swapfile in such a case.
> > >
> > > And to ensure both are switched off even if I have forgotten
> > > to do so, vim should do that automatically.
> > >
> > > I am working under Linux.
> > >
> > > The mountpoint for the flash (the microcontroller represents
> > > itsself as "USBstick" with 2M memory space...) is
> > > /home/user/flash and I am always editing python code.
> [...]
>
> 'backup' and 'writebackup' are global options, so disabling them for
> one file disables them for every file. If that's what you want, you
> can set them off in your vimrc. However, ":set nobackup writebackup"
> is supposed to leave nothing hanging around once the write has
> succeeded.
>
> For 'swapfile', which is buffer-local, it is easier. I suggest the
> following (untested):
>
> autocmd BufNewFile,BufReadPre /home/user/flash/**/* setlocal noswapfile

I tried part of that,

au BufReadPre *.py setlocal noswapfile

with the same results as "au FileType python", that is, I didn't see
a swapfile in the directory, but the modification time of the
directory changed, indicating that the swap file had been created,
then deleted.

Regards,
Gary

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