> -----Original Message-----
> From: Laszlo Ersek <ler...@redhat.com>
> Sent: Friday, February 14, 2020 7:15 AM
> To: Ni, Ray <ray...@intel.com>; devel@edk2.groups.io; Ard Biesheuvel
> <ard.biesheu...@arm.com>
> Cc: l...@nuviainc.com; phi...@redhat.com; Gao, Zhichao
> <zhichao....@intel.com>
> Subject: Re: [edk2-devel] [RFC PATCH 1/1] OvmfPkg: add 'initrd' shell
> command to expose Linux initrd via device path
> 
> On 02/12/20 15:21, Ni, Ray wrote:
> >> (3) However: I think this should be added as a Dynamic Command instead.
> >> I'm basing this on the message of commit 0961002352e9 ("ShellPkg/tftp:
> >> Convert from NULL class library to Dynamic Command", 2017-11-28),
> which
> >> is the first commit in edk2 ever to introduce a Dynamic Command.
> >>
> >> And the commit message there says:
> >>
> >>     The guideline is:
> >>     1. Only use NULL class library for Shell spec defined commands.
> >>     2. New commands can be provided as not only a standalone application
> >>        but also a dynamic command. So it can be used either as an
> >>        internal command, but also as a standalone application.
> >>
> >> I'm not asking for the command to be usable as a separate application,
> >> but I think we might want to follow the first guideline.
> >>
> >> (I've checked the UEFI Shell 2.2 spec. While it talks about dynamic
> >> commands, it does not seem to spell out guideline#1. So I think it's
> >> rather an edk2-specific guideline than a standard one. Nonetheless we
> >> might want to adhere to it.)
> >
> > Laszlo, thanks for the comments😊.
> > I didn't remember that I said these guideline publicly.
> > The reason behind that is we can have the same shell binary everywhere
> > and new non-spec commands can be added through dynamic command
> without
> > impacting the shell binary.
> 
> Thanks for the explanation -- this means that the NULL class lib
> approach is good for OvmfPkg after all. I'm putting the remaining parts
> of this patch back on my review queue (it will take a while).

Please don't misunderstand my points. I still prefer to use dynamic commands
for all non-spec defined shell internal commands.
Sorry for the confusion caused by my previous mail.

> 
> Thanks
> Laszlo


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