Re: [PATCH 2/2] Documentation: best practices for using Link trailers

[Leon Romanovsky <leon@kernel.org>]

On Tue, Jun 18, 2024 at 12:42:11PM -0400, Konstantin Ryabitsev wrote:
> 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>
> ---
>  Documentation/process/maintainer-tip.rst | 24 ++++++++++++++++++------
>  1 file changed, 18 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/process/maintainer-tip.rst b/Documentation/process/maintainer-tip.rst
> index 64739968afa6..57ffa553c21e 100644
> --- a/Documentation/process/maintainer-tip.rst
> +++ b/Documentation/process/maintainer-tip.rst
> @@ -375,14 +375,26 @@ following tag ordering scheme:
>     For referring to an email on LKML or other 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
>  
> -   The kernel.org redirector is considered a stable URL, unlike other email
> -   archives.
> +   This URL should be used when referring to relevant mailing list
> +   resources, related patch sets, or other notable discussion threads.
> +   A convenient way to associate Link trailers with the accompanying
> +   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]
> +
> +   When using the ``Link:`` trailer to indicate the provenance of the
> +   patch, you should use the dedicated ``patch.msgid.link`` domain. This
> +   makes it possible for automated tooling to establish which link leads
> +   to the original patch submission. For example::
> +
> +     Link: https://patch.msgid.link/patch-source-msgid@here

Default b4.linkmask points to https://msgid.link/ and not to https://patch.msgid.link/

https://git.kernel.org/pub/scm/utils/b4/b4.git/tree/.b4-config#n3
https://git.kernel.org/pub/scm/utils/b4/b4.git/tree/docs/config.rst#n46

It will be good to update the default value in b4 to point to the correct domain.

Thanks