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).
Thanks
Laszlo
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