From: Patrick Steinhardt <ps@pks.im>
To: git@vger.kernel.org, Jeff King <peff@peff.net>,
Karthik Nayak <karthik.188@gmail.com>,
Phillip Wood <phillip.wood123@gmail.com>,
Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH v2 07/10] refs: root refs can be symbolic refs
Date: Thu, 2 May 2024 10:07:58 +0200 [thread overview]
Message-ID: <ZjNJ3j2wSgui_cG8@tanuki> (raw)
In-Reply-To: <zmnute2cow2rbrv3cj5cq4roieyzssaxcnorxhorzyp3wfgllt@ubhsw6dpi5js>
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On Tue, Apr 30, 2024 at 12:09:57PM -0500, Justin Tobler wrote:
> On 24/04/30 02:26PM, Patrick Steinhardt wrote:
[snip]
> > diff --git a/refs.c b/refs.c
> > index 5b89e83ad7..ca9844bc3e 100644
> > --- a/refs.c
> > +++ b/refs.c
> ...
> > int is_headref(struct ref_store *refs, const char *refname)
> > {
> > - if (!strcmp(refname, "HEAD"))
> > - return refs_ref_exists(refs, refname);
> > + struct strbuf referent = STRBUF_INIT;
> > + struct object_id oid = { 0 };
> > + int failure_errno, ret = 0;
> > + unsigned int flags;
> >
> > - return 0;
> > + /*
> > + * Note that we cannot use `refs_ref_exists()` here because that also
> > + * checks whether its target ref exists in case refname is a symbolic
> > + * ref.
> > + */
> > + if (!strcmp(refname, "HEAD")) {
> > + ret = !refs_read_raw_ref(refs, refname, &oid, &referent,
> > + &flags, &failure_errno);
> > + }
> > +
> > + strbuf_release(&referent);
> > + return ret;
> > }
>
> I'm not quite sure I understand why we are changing the behavior of
> `is_headref()` here. Do we no longer want to validate the ref exists if
> it is symbolic?
The implementation does not conform to the definition of a "HEAD" ref.
Even before this patch series, a "HEAD" ref could either be a symbolic
or a regular ref. So to answer the question of "Is this a HEAD ref?" you
only need to check whether the ref exists, not whether its target
exists.
> In a prior commit, `is_headref()` is commented to mention that we check
> whether the reference exists. Maybe that could use some additional
> clarification?
Which particular commit do you refer to? It's not part of this series,
is it?
Patrick
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next prev parent reply other threads:[~2024-05-02 8:08 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-29 13:41 [PATCH 0/3] Clarify pseudo-ref terminology Patrick Steinhardt
2024-04-29 13:41 ` [PATCH 1/3] refs: move `is_special_ref()` Patrick Steinhardt
2024-04-29 13:41 ` [PATCH 2/3] refs: do not label special refs as pseudo refs Patrick Steinhardt
2024-04-29 15:12 ` Phillip Wood
2024-04-30 7:30 ` Patrick Steinhardt
2024-04-30 9:59 ` Phillip Wood
2024-04-30 12:11 ` Patrick Steinhardt
2024-04-30 10:23 ` Jeff King
2024-04-30 12:07 ` Karthik Nayak
2024-04-30 12:33 ` Patrick Steinhardt
2024-04-30 12:16 ` Patrick Steinhardt
2024-04-29 16:24 ` Junio C Hamano
2024-04-29 22:52 ` Justin Tobler
2024-04-30 7:29 ` Patrick Steinhardt
2024-05-09 17:29 ` Jean-Noël AVILA
2024-05-10 8:33 ` Patrick Steinhardt
2024-04-29 13:41 ` [PATCH 3/3] refs: fix segfault in `is_pseudoref()` when ref cannot be resolved Patrick Steinhardt
2024-04-29 15:25 ` Phillip Wood
2024-04-29 18:57 ` Karthik Nayak
2024-04-29 19:47 ` Phillip Wood
2024-04-29 20:44 ` Karthik Nayak
2024-04-30 7:30 ` Patrick Steinhardt
2024-04-30 12:26 ` [PATCH v2 00/10] Clarify pseudo-ref terminology Patrick Steinhardt
2024-04-30 12:26 ` [PATCH v2 01/10] Documentation/glossary: redefine pseudorefs as special refs Patrick Steinhardt
2024-04-30 12:49 ` Karthik Nayak
2024-04-30 17:17 ` Justin Tobler
2024-04-30 20:12 ` Junio C Hamano
2024-05-02 8:07 ` Patrick Steinhardt
2024-04-30 12:26 ` [PATCH v2 02/10] Documentation/glossary: clarify limitations of pseudorefs Patrick Steinhardt
2024-04-30 13:35 ` Kristoffer Haugsbakk
2024-04-30 12:26 ` [PATCH v2 03/10] Documentation/glossary: define root refs as refs Patrick Steinhardt
2024-04-30 12:56 ` Karthik Nayak
2024-04-30 12:26 ` [PATCH v2 04/10] refs: rename `is_pseudoref()` to `is_root_ref()` Patrick Steinhardt
2024-04-30 20:20 ` Junio C Hamano
2024-04-30 12:26 ` [PATCH v2 05/10] refs: refname `is_special_ref()` to `is_pseudo_ref()` Patrick Steinhardt
2024-04-30 12:58 ` Karthik Nayak
2024-04-30 12:26 ` [PATCH v2 06/10] refs: classify HEAD as a root ref Patrick Steinhardt
2024-04-30 12:26 ` [PATCH v2 07/10] refs: root refs can be symbolic refs Patrick Steinhardt
2024-04-30 17:09 ` Justin Tobler
2024-05-02 8:07 ` Patrick Steinhardt [this message]
2024-05-03 20:49 ` Justin Tobler
2024-05-07 10:32 ` Patrick Steinhardt
2024-04-30 12:26 ` [PATCH v2 08/10] refs: pseudorefs are no refs Patrick Steinhardt
2024-04-30 12:27 ` [PATCH v2 09/10] ref-filter: properly distinuish pseudo and root refs Patrick Steinhardt
2024-04-30 13:11 ` Karthik Nayak
2024-05-02 8:08 ` Patrick Steinhardt
2024-05-02 10:03 ` Karthik Nayak
2024-04-30 12:27 ` [PATCH v2 10/10] refs: refuse to write pseudorefs Patrick Steinhardt
2024-05-02 8:17 ` [PATCH v3 00/10] Clarify pseudo-ref terminology Patrick Steinhardt
2024-05-02 8:17 ` [PATCH v3 01/10] Documentation/glossary: redefine pseudorefs as special refs Patrick Steinhardt
2024-05-02 8:17 ` [PATCH v3 02/10] Documentation/glossary: clarify limitations of pseudorefs Patrick Steinhardt
2024-05-02 8:17 ` [PATCH v3 03/10] Documentation/glossary: define root refs as refs Patrick Steinhardt
2024-05-02 8:17 ` [PATCH v3 04/10] refs: rename `is_pseudoref()` to `is_root_ref()` Patrick Steinhardt
2024-05-02 8:17 ` [PATCH v3 05/10] refs: refname `is_special_ref()` to `is_pseudo_ref()` Patrick Steinhardt
2024-05-02 8:17 ` [PATCH v3 06/10] refs: classify HEAD as a root ref Patrick Steinhardt
2024-05-02 8:17 ` [PATCH v3 07/10] refs: root refs can be symbolic refs Patrick Steinhardt
2024-05-03 18:13 ` Jeff King
2024-05-15 4:16 ` Patrick Steinhardt
2024-05-15 4:39 ` Patrick Steinhardt
2024-05-15 6:22 ` Jeff King
2024-05-15 6:35 ` Patrick Steinhardt
2024-05-15 6:49 ` Jeff King
2024-05-15 6:59 ` Patrick Steinhardt
2024-05-15 6:20 ` Jeff King
2024-05-02 8:17 ` [PATCH v3 08/10] refs: pseudorefs are no refs Patrick Steinhardt
2024-05-02 8:17 ` [PATCH v3 09/10] ref-filter: properly distinuish pseudo and root refs Patrick Steinhardt
2024-05-02 8:17 ` [PATCH v3 10/10] refs: refuse to write pseudorefs Patrick Steinhardt
2024-05-10 8:48 ` [PATCH v4 00/10] Clarify pseudo-ref terminology Patrick Steinhardt
2024-05-10 8:48 ` [PATCH v4 01/10] Documentation/glossary: redefine pseudorefs as special refs Patrick Steinhardt
2024-05-10 8:48 ` [PATCH v4 02/10] Documentation/glossary: clarify limitations of pseudorefs Patrick Steinhardt
2024-05-10 8:48 ` [PATCH v4 03/10] Documentation/glossary: define root refs as refs Patrick Steinhardt
2024-05-10 8:48 ` [PATCH v4 04/10] refs: rename `is_pseudoref()` to `is_root_ref()` Patrick Steinhardt
2024-05-10 8:48 ` [PATCH v4 05/10] refs: refname `is_special_ref()` to `is_pseudo_ref()` Patrick Steinhardt
2024-05-10 8:48 ` [PATCH v4 06/10] refs: root refs can be symbolic refs Patrick Steinhardt
2024-05-10 8:48 ` [PATCH v4 07/10] refs: classify HEAD as a root ref Patrick Steinhardt
2024-05-10 8:48 ` [PATCH v4 08/10] refs: pseudorefs are no refs Patrick Steinhardt
2024-05-10 8:48 ` [PATCH v4 09/10] ref-filter: properly distinuish pseudo and root refs Patrick Steinhardt
2024-05-10 8:48 ` [PATCH v4 10/10] refs: refuse to write pseudorefs Patrick Steinhardt
2024-05-10 18:59 ` [PATCH v4 00/10] Clarify pseudo-ref terminology Junio C Hamano
2024-05-15 6:50 ` [PATCH v5 " Patrick Steinhardt
2024-05-15 6:50 ` [PATCH v5 01/10] Documentation/glossary: redefine pseudorefs as special refs Patrick Steinhardt
2024-05-15 6:50 ` [PATCH v5 02/10] Documentation/glossary: clarify limitations of pseudorefs Patrick Steinhardt
2024-05-15 6:50 ` [PATCH v5 03/10] Documentation/glossary: define root refs as refs Patrick Steinhardt
2024-05-15 6:50 ` [PATCH v5 04/10] refs: rename `is_pseudoref()` to `is_root_ref()` Patrick Steinhardt
2024-05-15 6:50 ` [PATCH v5 05/10] refs: rename `is_special_ref()` to `is_pseudo_ref()` Patrick Steinhardt
2024-05-15 6:50 ` [PATCH v5 06/10] refs: do not check ref existence in `is_root_ref()` Patrick Steinhardt
2024-05-15 20:38 ` Justin Tobler
2024-05-16 4:13 ` Patrick Steinhardt
2024-05-15 6:50 ` [PATCH v5 07/10] refs: classify HEAD as a root ref Patrick Steinhardt
2024-05-15 20:44 ` Justin Tobler
2024-05-15 6:51 ` [PATCH v5 08/10] refs: pseudorefs are no refs Patrick Steinhardt
2024-05-15 6:51 ` [PATCH v5 09/10] ref-filter: properly distinuish pseudo and root refs Patrick Steinhardt
2024-05-15 6:51 ` [PATCH v5 10/10] refs: refuse to write pseudorefs Patrick Steinhardt
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