From: Phillip Wood <phillip.wood123@gmail.com>
To: Patrick Steinhardt <ps@pks.im>, git@vger.kernel.org
Cc: Jeff King <peff@peff.net>, Karthik Nayak <karthik.188@gmail.com>
Subject: Re: [PATCH 2/3] refs: do not label special refs as pseudo refs
Date: Mon, 29 Apr 2024 16:12:37 +0100 [thread overview]
Message-ID: <e57ed591-5006-453e-bc93-6c53fcab2aec@gmail.com> (raw)
In-Reply-To: <b5e7ddb1e30acb7e3871a189beb2c828b18f9e73.1714398019.git.ps@pks.im>
Hi Patrick
On 29/04/2024 14:41, Patrick Steinhardt wrote:
> diff --git a/Documentation/glossary-content.txt b/Documentation/glossary-content.txt
> index d71b199955..4275918fa0 100644
> --- a/Documentation/glossary-content.txt
> +++ b/Documentation/glossary-content.txt
> @@ -497,20 +497,28 @@ exclude;;
> unusual refs.
>
> [[def_pseudoref]]pseudoref::
> - Pseudorefs are a class of files under `$GIT_DIR` which behave
> - like refs for the purposes of rev-parse, but which are treated
> - specially by git. Pseudorefs both have names that are all-caps,
> - and always start with a line consisting of a
> - <<def_SHA1,SHA-1>> followed by whitespace. So, HEAD is not a
> - pseudoref, because it is sometimes a symbolic ref. They might
> - optionally contain some additional data. `MERGE_HEAD` and
> - `CHERRY_PICK_HEAD` are examples. Unlike
> - <<def_per_worktree_ref,per-worktree refs>>, these files cannot
> - be symbolic refs, and never have reflogs. They also cannot be
> - updated through the normal ref update machinery. Instead,
> - they are updated by directly writing to the files. However,
> - they can be read as if they were refs, so `git rev-parse
> - MERGE_HEAD` will work.
> + Pseudorefs are references that live in the root of the reference
> + hierarchy, outside of the usual "refs/" hierarchy. Pseudorefs have an
> + all-uppercase name and must end with a "_HEAD" suffix, for example
> + "`BISECT_HEAD`". Other than that, pseudorefs behave the exact same as
> + any other reference and can be both read and written via regular Git
> + tooling.
This changes the definition to allow pseudorefs to by symbolic refs.
When is_pseudoref() was introduced Junio and I had a brief discussion
about this restriction and he was not in favor of allowing pseudorefs to
be symbolic refs [1].
Are there any practical implications of the changes in this patch for
users running commands like "git log FETCH_HEAD" (I can't think of any
off the top of my head but it would be good to have some reassurance on
that point in the commit message)
Best Wishes
Phillip
[1] https://lore.kernel.org/git/xmqq34u2q3zs.fsf@gitster.g/
> +<<def_special_ref>,Special refs>> are not pseudorefs.
> ++
> +Due to historic reasons, Git has several irregular pseudo refs that do not
> +follow above rules. The following list of irregular pseudo refs is exhaustive
> +and shall not be extended in the future:
> +
> + - "`AUTO_MERGE`"
> +
> + - "`BISECT_EXPECTED_REV`"
> +
> + - "`NOTES_MERGE_PARTIAL`"
> +
> + - "`NOTES_MERGE_REF`"
> +
> + - "`MERGE_AUTOSTASH`"
>
> [[def_pull]]pull::
> Pulling a <<def_branch,branch>> means to <<def_fetch,fetch>> it and
> diff --git a/refs.c b/refs.c
> index c64f66bff9..567c6fc6ff 100644
> --- a/refs.c
> +++ b/refs.c
> @@ -905,6 +905,8 @@ int is_pseudoref(struct ref_store *refs, const char *refname)
>
> if (!is_pseudoref_syntax(refname))
> return 0;
> + if (is_special_ref(refname))
> + return 0;
>
> if (ends_with(refname, "_HEAD")) {
> refs_resolve_ref_unsafe(refs, refname,
> diff --git a/t/t6302-for-each-ref-filter.sh b/t/t6302-for-each-ref-filter.sh
> index 948f1bb5f4..8c92fbde79 100755
> --- a/t/t6302-for-each-ref-filter.sh
> +++ b/t/t6302-for-each-ref-filter.sh
> @@ -52,6 +52,23 @@ test_expect_success '--include-root-refs pattern prints pseudorefs' '
> test_cmp expect actual
> '
>
> +test_expect_success '--include-root-refs pattern does not print special refs' '
> + test_when_finished "rm -rf repo" &&
> + git init repo &&
> + (
> + cd repo &&
> + test_commit initial &&
> + git rev-parse HEAD >.git/MERGE_HEAD &&
> + git for-each-ref --format="%(refname)" --include-root-refs >actual &&
> + cat >expect <<-EOF &&
> + HEAD
> + $(git symbolic-ref HEAD)
> + refs/tags/initial
> + EOF
> + test_cmp expect actual
> + )
> +'
> +
> test_expect_success '--include-root-refs with other patterns' '
> cat >expect <<-\EOF &&
> HEAD
next prev parent reply other threads:[~2024-04-29 15:20 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 [this message]
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
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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