Re: [Qemu-devel] [RFC PATCH qemu] git-submodule.sh: Do not try writing to source directory if not necessary

["Daniel P. Berrange" <berrange@redhat.com>]

On Wed, Oct 25, 2017 at 12:45:10PM +1100, Alexey Kardashevskiy wrote:
> On 25/10/17 03:27, Daniel P. Berrange wrote:
> > On Tue, Oct 24, 2017 at 07:58:53PM +1100, Alexey Kardashevskiy wrote:
> >> The new git-submodule.sh script writes .git-submodule-status to
> >> the source directory every time no matter what. This makes it conditional.
> >>
> >> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> >> ---
> >>
> >> I compile out of tree on a remote guest system where I mount the
> >> source directory as "readonly" and build directory as "rw" and
> >> scripts/git-submodule.sh tries writing to the source directory even when
> >> I manually update modules on a host machine which is quite annoying.
> >>
> >> Is this something acceptable? Or I am missing something here?
> > 
> > How did you update the modules - did you manually run  'git submodule update...'
> > or did you use the git-submodule.sh script on your host machine ?
> 
> 
> I run scripts/git-submodule.sh. Which is not thrilling either as I rather
> expect source tree not to be affected in any way when running "make".

Oh, did you pass the list of sub-modules to it when running

eg, ./scripts/git-submodule.sh update ui/keycodemapdb

the list of submodules you need is printed in the configure output summary.

> > If you run git-submodule.sh on the host, then it should save the status
> > file, and then when you run make on the guest system, it should notice
> > that you're already updated and never even invoke 'git-submodule.sh update'
> 
> 
> scripts/git-submodule.sh also tries writing to the source directory (I
> should probably have fixed that branch too) but this failure is not fatal
> for "make" but makes it want to try "update" and then "make" fails.

This shouldn't have happened in your case though, if you have already run
'git-submodule.sh update ...list of modules...' on the host machine, with
the same list of modules that the guest 'configure' printed out.

Regards,
Daniel
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