Re: [Qemu-devel] [PATCH] QMP: allow JSON dict arguments in qmp-shell

[Kevin Wolf <kwolf@redhat.com>]

Am 11.02.2014 um 02:39 hat Fam Zheng geschrieben:
> On Wed, 01/29 12:17, Stefan Hajnoczi wrote:
> > qmp-shell hides the QMP wire protocol JSON encoding from the user.  Most
> > of the time this is helpful and makes the command-line human-friendly.
> > 
> > Some QMP commands take a dict as an argument.  In order to express this
> > we need to revert back to JSON notation.
> > 
> > This patch allows JSON dict arguments in qmp-shell so commands like
> > blockdev-add and nbd-server-start can be invoked:
> > 
> >   (QEMU) blockdev-add options={"driver":"file","id":"drive1",...}
> > 
> > Note that spaces are not allowed since str.split() is used to break up
> > the command-line arguments first.
> > 
> > Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> > ---
> 
> While this is definitely useful, just wondering if it is more friendly to allow
> passing options as command line options do:
> 
>     (QEMU) blockdev-add options.driver=file options.id=drive1

In fact, I have been considering the brace syntax even for the command
line, because the dot syntax gets a bit too verbose when you have a lot
of nested dicts. The reason why I didn't do it is that it would
introduce more special characters.

>From a usability POV, it might be best to have both.

Kevin