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From: Jeff King <peff@peff.net>
To: Taylor Blau <me@ttaylorr.com>
Cc: git@vger.kernel.org, dstolee@microsoft.com
Subject: Re: [PATCH 3/3] commit-graph: respect 'core.useBloomFilters'
Date: Tue, 30 Jun 2020 15:33:40 -0400
Message-ID: <20200630193340.GA1889576@coredump.intra.peff.net> (raw)
In-Reply-To: <20200630192718.GA31522@syl.lan>

On Tue, Jun 30, 2020 at 03:27:18PM -0400, Taylor Blau wrote:

> So, I'm certainly open to changing it, although I'm not sure that I'm as
> worried about exposing the implementation detail as I am about squatting
> on Bloom filters within Git in general. I don't think that this
> configuration will end up getting used by folks other than server
> administrators and for debugging purposes, so those populations are
> already likely to be aware of changed-path Bloom filters beforehand.

Yeah, the squatting thing is definitely my bigger concern (having been
through the "bitmaps" version of the same thing).

> > It might even be worth considering whether "changed paths" needs more
> > context (or would if we add new features in the future). On a "git
> > commit-graph write" command-line it is perfectly clear, but would
> > core.commitGraphChangedPaths be worth it? It's definitely more specific,
> > but it's also way more ugly. ;)
> 
> Here's a third option what about 'graph.readChangedPaths'. I think that
> Stolee and I discussed a new top-level 'graph' section, since we now
> have a few commit-graph-related configuration variables in 'core'.

Yes, I like that even better. Probably "graph" is sufficiently specific
within Git's context, though I guess it _could_ bring to mind "git log
--graph". So many overloaded terms. :)

> That's a little shorter, and it adds the verb 'read', which is more
> descriptive than 'use' (I touch on this in the third patch, where I say
> that this configuration variable _doesn't_ affect the '--changed-path'
> option when writing).

Yeah, saying "read" specifically is much nicer.

> > > +	prepare_repo_settings(the_repository);
> > > +
> > >  	graph = read_commit_graph_one(the_repository, odb);
> >
> > I wondered why we would need this prepare_repo_settings() now, when it
> > should have been needed already to cover core.commitGraph already. I
> > strongly suspect the answer is: "test-tool read-graph" never properly
> > respected core.commitGraph in the first place.
> 
> Yep. Could probably be broken out into a separate patch (or mentioned as
> an aside in this one), but you're right: this helper did not respect
> any configuration that 'prepare_repo_settings' picks up.

I'd probably just note it in the commit message, but I'd be fine with
that or with a separate patch.

-Peff

  reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-30 17:17 [PATCH 0/3] commit-graph: introduce 'core.useBloomFilters' Taylor Blau
2020-06-30 17:17 ` [PATCH 1/3] commit-graph: pass a 'struct repository *' in more places Taylor Blau
2020-06-30 20:52   ` Derrick Stolee
2020-06-30 17:17 ` [PATCH 2/3] t4216: fix broken '&&'-chain Taylor Blau
2020-06-30 17:50   ` Eric Sunshine
2020-06-30 18:39     ` Taylor Blau
2020-06-30 19:03       ` Jeff King
2020-06-30 19:12         ` Taylor Blau
2020-06-30 19:19           ` Jeff King
2020-06-30 19:48         ` Eric Sunshine
2020-06-30 18:55     ` Jeff King
2020-06-30 17:17 ` [PATCH 3/3] commit-graph: respect 'core.useBloomFilters' Taylor Blau
2020-06-30 19:18   ` Jeff King
2020-06-30 19:27     ` Taylor Blau
2020-06-30 19:33       ` Jeff King [this message]
2020-08-03 19:02 ` [PATCH 0/3] commit-graph: introduce 'core.useBloomFilters' Taylor Blau
2020-07-01  9:58 [PATCH 3/3] commit-graph: respect 'core.useBloomFilters' Son Luong Ngoc
2020-07-13 19:22 ` Taylor Blau

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