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Documentation: best practices for using Link trailers

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Based on multiple conversations, most recently on the ksummit mailing
list [1], add some best practices for using the Link trailer, such as:

- how to use markdown-like bracketed numbers in the commit message to
indicate the corresponding link
- when to use lore.kernel.org vs patch.msgid.link domains

Cc: ksummit@lists.linux.dev
Link: https://lore.kernel.org/20240617-arboreal-industrious-hedgehog-5b84ae@meerkat # [1]
Signed-off-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20240619-docs-patch-msgid-link-v2-2-72dd272bfe37@linuxfoundation.org
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Konstantin Ryabitsev 2024-06-19 14:24:07 -04:00 committed by Jonathan Corbet
parent 413e775efa
commit 127734e23a
1 changed files with 22 additions and 8 deletions
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Documentation/process/maintainer-tip.rst
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@ -372,17 +372,31 @@ following tag ordering scheme:
- Link: ``https://link/to/information``
For referring to an email on LKML or other kernel mailing lists,
please use the lore.kernel.org redirector URL::
For referring to an email posted to the kernel mailing lists, please
use the lore.kernel.org redirector URL::
https://lore.kernel.org/r/email-message@id
Link: https://lore.kernel.org/email-message-id@here
The kernel.org redirector is considered a stable URL, unlike other email
archives.
This URL should be used when referring to relevant mailing list
topics, related patch sets, or other notable discussion threads.
A convenient way to associate ``Link:`` trailers with the commit
message is to use markdown-like bracketed notation, for example::
Maintainers will add a Link tag referencing the email of the patch
submission when they apply a patch to the tip tree. This tag is useful
for later reference and is also used for commit notifications.
A similar approach was attempted before as part of a different
effort [1], but the initial implementation caused too many
regressions [2], so it was backed out and reimplemented.
Link: https://lore.kernel.org/some-msgid@here # [1]
Link: https://bugzilla.example.org/bug/12345 # [2]
You can also use ``Link:`` trailers to indicate the origin of the
patch when applying it to your git tree. In that case, please use the
dedicated ``patch.msgid.link`` domain instead of ``lore.kernel.org``.
This practice makes it possible for automated tooling to identify
which link to use to retrieve the original patch submission. For
example::
Link: https://patch.msgid.link/patch-source-message-id@here
Please do not use combined tags, e.g. ``Reported-and-tested-by``, as
they just complicate automated extraction of tags.