Re: [PATCH] refs: remove lookup cache for reference-transaction hook

[Patrick Steinhardt <ps@pks.im>]

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On Fri, Aug 21, 2020 at 01:21:37PM -0400, Jeff King wrote:
> On Fri, Aug 21, 2020 at 09:42:45AM -0700, Junio C Hamano wrote:
> 
> > Jeff King <peff@peff.net> writes:
> > 
> > > However, I wondered...
> > >
> > >> +test_perf "nonatomic push" '
> > >> +	git push ./target-repo.git branch-{1..1000} &&
> > >> +	git push --delete ./target-repo.git branch-{1..1000}
> > >> +'
> > 
> > Is this a bash-and-ksh-only test?  At least, the above would not try
> > to push 1000 branches with the version of dash I have.

I didn't realize it's shell-specific behaviour, thanks for highlighting.

> Heh, I was so focused on the "push" part of it that I didn't even look
> carefully at the second half of the command-line. ;)
> 
> I think pushing "refs/heads/branch-*" would work for pushing. For
> deletion, though, I don't think we allow wildcards in the refspecs.
> You could abuse pruning:
> 
>   git push --prune ../dst.git refs/heads/does-not-exist/*:refs/heads/*
> 
> It also may be OK to just omit that half of the test. I think the
> initial push exercises the case we care about. Though I guess we do run
> the test repeatedly, so we might have to do:
> 
>   rm -rf dst.git &&
>   git init dst.git &&
>   git push dst.git refs/heads/branch-*

I'm not too keen to use `rm -rf && git init` as it muddies the subject
under test a bit. I'll try to come up with a non-shell-specific version
of this on Monday.

Patrick

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