[libvirt PATCH] qemu_conf: properly set 'deprecation_behavior' default value

[Peter Krempa]

On Tue, Apr 13, 2021 at 13:09:15 +0200, Pavel Hrdina wrote:
> On Tue, Apr 13, 2021 at 12:53:23PM +0200, Peter Krempa wrote:
> > On Tue, Apr 13, 2021 at 11:10:18 +0200, Pavel Hrdina wrote:
> > > The comment for that option states that the default value is 'none' but
> > > it was not set by the code.
> > > 
> > > Fixes: 700450449377be4bf923e91d00f8fe8cf0975f66
> > > Signed-off-by: Pavel Hrdina <phrdina at redhat.com>
> > > ---
> > 
> > Could you please elaborate what the problem of not setting it is?
> > 
> > 'none' the same as NULL should result in doing nothing.
> 
> When the config is not set in qemu.conf libvirt will print the following
> warning if there is any deprecated command used:
> 
> warning : qemuBuildCompatDeprecatedCommandLine:10393 : Unsupported deprecation behavior '(null)' for VM 'test'
> 
> So no NULL and 'none' are not the same.
> 
> We could fix qemuBuildCompatDeprecatedCommandLine() but I figured that
> this is what we do with other options so that would be preferred
> solution.

Sure. I agree, but as I've noted in reply to Michal, such explanation
should be part of the commit message.