From: Taylor Blau <email@example.com> To: Junio C Hamano <firstname.lastname@example.org> Cc: "Taylor Blau" <email@example.com>, "Jeff King" <firstname.lastname@example.org>, "SZEDER Gábor" <email@example.com>, "Derrick Stolee" <firstname.lastname@example.org>, email@example.com Subject: Re: [PATCH 3/3] commit-graph: error out on invalid commit oids in 'write --stdin-commits' Date: Fri, 3 Apr 2020 13:57:36 -0600 [thread overview] Message-ID: <20200403195736.GB58262@syl.local> (raw) In-Reply-To: <firstname.lastname@example.org> On Fri, Apr 03, 2020 at 12:47:03PM -0700, Junio C Hamano wrote: > Taylor Blau <email@example.com> writes: > > > On Fri, Apr 03, 2020 at 02:30:57PM -0400, Jeff King wrote: > >> On Mon, Aug 05, 2019 at 10:02:40AM +0200, SZEDER Gábor wrote: > >> > >> > Check that all input records are indeed valid commit object ids and > >> > return with error otherwise, the same way '--stdin-packs' handles > >> > invalid input; see e103f7276f (commit-graph: return with errors during > >> > write, 2019-06-12). > >> > >> Can you explain more why the old behavior is a problem? For reasons (see > >> below), we want to do something like: > >> > >> git for-each-ref --format='%(objectname)' | > >> git commit-graph write --stdin-commits > >> ... > >> - you're generating an incremental graph update. You know somehow that > >> a few refs were updated, and you want to feed those tips to generate > >> the incremental, but not the rest of the refs (not because it would > >> be wrong to do so, but in the name of keeping it O(size of change) > >> and not O(number of refs in the repo). > >> ... > >> Normally I'm in favor of more error checking instead of less, but in > >> this case it feels like it's putting scripted use at a disadvantage > >> versus the internal code (e.g., the auto-write for git-fetch uses the > >> "--reachable" semantics for its internal invocation). > > I think the "incremental from the tip of refs" is a valid and useful > use case. I am not sure if the rationale given in the original to > compare the (stricter) check done here and what e103f7276f did > (which does not seem to get any input, valid or invalid, from the > end users) was a meaningful comparison, and regardless of Gábor's > answer to Peff's question, I think we should have an easy way to let > the machinery itself filter non-commit, so "--[no-]check-oids" that > optionally turns the stricter checking off would be an easy way out. Thanks. I think that this is probably my preference, too. I'll send this as a patch to the list shortly... > I do not have a strong opinion on which way the default should be > (at least not yet), but given that this was already in two major > releases ago, I'd assume that stricter-by-default-with-escape-hatch > would be the way to go (at least for now). Yeah. I think the nice thing about those patches is that we don't have to decide that right away. > > For what it's worth, (and in case it wasn't obvious) this came about > > because we feed '--stdin-commits' at GitHub, and observed exactly this > > error case. I wasn't sure what approach would be more palatable, so I > > prepared both in my fork at https://github.com/ttaylorr/git: > > > > - Branch 'tb/commit-graph-dont-check-oids' drops this checking > > entirely. > > > > - Branch 'tb/commit-graph-check-oids-option' adds a > > '--[no-]check-oids', in case that this is generally desirable > > behavior, by offering an opt-out of this OID checking. > > Thanks. Likewise :). Thanks, Taylor
next prev parent reply other threads:[~2020-04-03 19:57 UTC|newest] Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-08-05 8:02 [PATCH 0/3] " SZEDER Gábor 2019-08-05 8:02 ` [PATCH 1/3] t5318-commit-graph: use 'test_expect_code' SZEDER Gábor 2019-08-05 8:02 ` [PATCH 2/3] commit-graph: turn a group of write-related macro flags into an enum SZEDER Gábor 2019-08-05 8:02 ` [PATCH 3/3] commit-graph: error out on invalid commit oids in 'write --stdin-commits' SZEDER Gábor 2019-08-05 13:57 ` Derrick Stolee 2019-08-05 17:57 ` SZEDER Gábor 2020-04-03 18:30 ` Jeff King 2020-04-03 18:49 ` Taylor Blau 2020-04-03 19:38 ` SZEDER Gábor 2020-04-03 19:51 ` Jeff King 2020-04-03 20:40 ` SZEDER Gábor 2020-04-03 23:10 ` Jeff King 2020-04-13 19:39 ` Taylor Blau 2020-04-13 21:25 ` Jeff King 2020-04-14 2:04 ` Taylor Blau 2020-04-03 19:55 ` Taylor Blau 2020-04-03 19:47 ` Junio C Hamano 2020-04-03 19:57 ` Taylor Blau [this message] 2019-08-05 10:14 ` [PATCH 0/3] " SZEDER Gábor
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