Re: Partial Clone, and a strange slow rev-list call on fetch

On Fri, Jun 4, 2021 at 3:21 PM Derrick Stolee [off-list ref] wrote:

You
have convinced me that there are deeper things going on than just
the "unshallow, but with filters this time" situation.

I have created an internal issue for my team to investigate this
when we have capacity for it.

Awesome, thanks!

One more comment on this: As I was trawling through release notes
looking for the right minimum git client version to target/support, I
discovered that the whole "fetch shallow, then unshallow filtered"
flow, which I might have thought I came up with on my own, was
intended to be supported with a change Xin Li made about a year ago,
and landed in 2.28.0:
https://github.com/git/git/commit/01bbbbd9daaa277a95ae46e5a32f6fba026610ac.

As far as I can tell this implementation/behavior does *not* attempt
to convert existing non-promisor packfiles to promisor packfiles, so
either this behavior should be adjusted to do so, or we should
consider this flow (and the presence of non-promisor packfiles at the
"tip") supported...?