Re: [PATCH 3/4] t5604: do not expect that HEAD is a valid tagname

From: Jeff King <peff@peff.net>
Date: Dec 2, 2024, 21:00 UTC
Message-ID: <20241202210006.GE776185@coredump.intra.peff.net>
In-Reply-To: <477f0dbd-60ed-4f73-b945-cdbdaf9f510a@app.fastmail.com>

On Mon, Dec 02, 2024 at 01:19:56PM +0100, Kristoffer Haugsbakk wrote:

Show 5 quoted lines

> On Mon, Dec 2, 2024, at 08:07, Junio C Hamano wrote:
> > 09116a1c (refs: loosen over-strict "format" check, 2011-11-16)
> 
> Nit/confusion: the abbreviated hash is only eight hexes long.  I’m used to it
> being 11 for this project?

It's not a fixed size. Long ago, the rule was "enough to be unique, but at least 7 (or whatever you set core.abbrev to)". These days that "7" is scaled based on the number of objects in the repo. See e6c587c733 (abbrev: auto size the default abbreviation, 2016-09-30).

So I'd expect 10 digits in a fresh clone of git.git. It's possible Junio has set core.abbrev to something fixed, though.

> Does the age of the commit matter?

Nope, it shouldn't.

-Peff