Re: [PATCH 0/3] support `--oid-only` in `ls-tree`

A quick patch to do it below, seems to work, passes all tests, but I
don't know how much I'd trust it. It's also quite an add use of
strbuf_expa(). We print to stdout directly since
write_name_quoted_relative() really wants to write to stdout, and not
give you a buffer. But I guess it makes sense in a way.

Thanks for the patch and the inputs about "strbuf_expa()".

Then we'd be future-proof with the same interface expanding later, and
wouldn't need to support options that we're only carrying because we
didn't implement the more generic format support.

I agree but like Peff said it maybe another bigger task. I think I will
firstly solve the existing problems in next patch.

I will consider about the generic format support but not sure whether
it will continue to iterate in this patchset.

(Assume my Signed-off-by, if there's any interest...)

Of course I will.

Thank you very much for your advice and guidance again.