Re: [Xen-devel] xm create option parsing..

[Mike Wray <mike.wray@xxxxxxxxxx>]

Ian Pratt wrote:

>  
>
> > It's an artifact of getopt - it stops parsing options at
> > the first non-option. So
> >
> > It think there's a getopt flag to process options anywhere
> > in the args, but this is a problem for a multicommand like xm
> > that has its own options as well as subcommand options.
> >
> > Basically options (-x, --x) have to precede args.
>
> I think the current behaviour is sufficiently unintuitive that we
> need to fix it: after finding the sub command, we should scan the
> whole of the rest of the command line for args.
>
> What does -x and --x do ?  I couldn't find them in the help
> message.
Just example option flags.

> I think the best policy is to ensure that arg flags never clash
> between 'xm' and it's sub commands (I don't believe we currently
> have any clashes), and to look for them in any position.

We potentially have

xm <xm options> subcommand <subcommand options/args>

It doesn't really make sense to allow xm options after the subcommand.

Each subcommand is responsible for parsing its own options, so
we could get 'xm create' etc. to allow options after the args.
I'll make the change.

Mike