linux-kernel - Re: [PATCH] docs: redirect from old arch to the new one

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Date:   Fri, 28 Apr 2023 13:24:15 +0100
From:   Mauro Carvalho Chehab <mchehab@...nel.org>
To:     Costa Shulyupin <costa.shul@...hat.com>
Cc:     Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org (open list)
Subject: Re: [PATCH] docs: redirect from old arch to the new one

Em Thu, 27 Apr 2023 13:12:39 +0300
Costa Shulyupin <costa.shul@...hat.com> escreveu:

> Due to a recent reorganization of 'CPU Architectures', the links to
> the documentation from external resources were rendered invalid.
> This is a common challenge when attempting to make changes
> while maintaining backward compatibility. To address this issue,
> a commit has been made which uses sphinx extension to seamlessly
> redirect users from the old location of the page to the new one.
> 
> 
> Signed-off-by: Costa Shulyupin <costa.shul@...hat.com>
> ---
>  Documentation/conf.py                 | 8 +++++++-
>  Documentation/sphinx/requirements.txt | 1 +
>  2 files changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/conf.py b/Documentation/conf.py
> index 37314afd1ac8..514bfe6a8166 100644
> --- a/Documentation/conf.py
> +++ b/Documentation/conf.py
> @@ -55,7 +55,13 @@ needs_sphinx = '1.7'
>  extensions = ['kerneldoc', 'rstFlatTable', 'kernel_include',
>                'kfigure', 'sphinx.ext.ifconfig', 'automarkup',
>                'maintainers_include', 'sphinx.ext.autosectionlabel',
> -              'kernel_abi', 'kernel_feat']
> +              'kernel_abi', 'kernel_feat',
> +              'sphinx_reredirects',
> +]


Besides Jon's comment, if we add something like this, please make
such extension optional (in a similar way to what we do for 
sphinx.ext.imgmath), as this is only pertinent on websites meant
to provide  the Kernel documentation.

> +
> +redirects = {
> +     "arch.html": "arch/index.html",
> +}

I suspect that maintaining a list of all redirects here can be
painful, as, from time to time, we see documentation churns.

We should likely need some script to check what renames happened
since a previous Kernel version, generating it automatically.

Again, as this is something that only applies to websites hosting
documentation, IMO the best would be to have a separate file
("conf_redirects.py") included on conf.py, that will be
auto-generated by a script that would receive, as input, the
initial Kernel version where redirects should be preserved.

Regards,
Mauro

>  
>  if major >= 3:
>      if (major > 3) or (minor > 0 or patch >= 2):
> diff --git a/Documentation/sphinx/requirements.txt b/Documentation/sphinx/requirements.txt
> index 335b53df35e2..0b067e985edb 100644
> --- a/Documentation/sphinx/requirements.txt
> +++ b/Documentation/sphinx/requirements.txt
> @@ -1,3 +1,4 @@
>  # jinja2>=3.1 is not compatible with Sphinx<4.0
>  jinja2<3.1
>  Sphinx==2.4.4
> +sphinx_reredirects