linux-kernel - Re: [PATCH v3 1/2] docs: Move rustdoc output, cross-reference it

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Date:   Wed, 7 Dec 2022 07:49:25 -0600
From:   Carlos Bilbao <carlos.bilbao@....com>
To:     Jani Nikula <jani.nikula@...ux.intel.com>, corbet@....net,
        akiyks@...il.com, ojeda@...nel.org
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        bilbao@...edu, konstantin@...uxfoundation.org
Subject: Re: [PATCH v3 1/2] docs: Move rustdoc output, cross-reference it

On 12/7/22 2:27 AM, Jani Nikula wrote:
> On Tue, 06 Dec 2022, Carlos Bilbao <carlos.bilbao@....com> wrote:
>> Generate rustdoc documentation with the rest of subsystem's documentation
>> in Documentation/output. Add a cross reference to the generated rustdoc in
>> Documentation/rust/index.rst.
>>
>> Signed-off-by: Carlos Bilbao <carlos.bilbao@....com>
>> ---
>>  Documentation/rust/index.rst |  5 +++++
>>  rust/Makefile                | 15 +++++++++------
>>  2 files changed, 14 insertions(+), 6 deletions(-)
>>
>> diff --git a/Documentation/rust/index.rst b/Documentation/rust/index.rst
>> index 4ae8c66b94fa..416d6b3de1e4 100644
>> --- a/Documentation/rust/index.rst
>> +++ b/Documentation/rust/index.rst
>> @@ -6,6 +6,11 @@ Rust
>>  Documentation related to Rust within the kernel. To start using Rust
>>  in the kernel, please read the quick-start.rst guide.
>>  
>> +.. only:: html
>> +
>> +	If this documentation includes rustdoc-generated HTML, the entry
>> +	point can be found `here <rustdoc/kernel/index.html>`_.
>> +
> 
> It's a bit meh to have documentation that points to places that might
> 404 and the user has to figure it out.
> 
> We can do better than that.
> 
> You could use CONFIG_RUST to pass e.g. "-t rustdoc" to Sphinx in the
> Makefile, and use:
> 
> .. only:: rustdoc
> 
> and
> 
> .. only:: not rustdoc
> 
> And document accordingly.
> 
> Also, please don't use "here" as the link text.

Why not?

> 
> BR,
> Jani.
> 
> 
>>  .. toctree::
>>      :maxdepth: 1
>>  
>> diff --git a/rust/Makefile b/rust/Makefile
>> index 7700d3853404..080c07048065 100644
>> --- a/rust/Makefile
>> +++ b/rust/Makefile
>> @@ -1,5 +1,8 @@
>>  # SPDX-License-Identifier: GPL-2.0
>>  
>> +# Where to place rustdoc generated documentation
>> +RUSTDOC_OUTPUT = $(objtree)/Documentation/output/rust/rustdoc
>> +
>>  always-$(CONFIG_RUST) += target.json
>>  no-clean-files += target.json
>>  
>> @@ -58,7 +61,7 @@ quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $<
>>  	OBJTREE=$(abspath $(objtree)) \
>>  	$(RUSTDOC) $(if $(rustdoc_host),$(rust_common_flags),$(rust_flags)) \
>>  		$(rustc_target_flags) -L$(objtree)/$(obj) \
>> -		--output $(objtree)/$(obj)/doc \
>> +		--output $(RUSTDOC_OUTPUT) \
>>  		--crate-name $(subst rustdoc-,,$@) \
>>  		@$(objtree)/include/generated/rustc_cfg $<
>>  
>> @@ -75,15 +78,15 @@ quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $<
>>  # and then retouch the generated files.
>>  rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \
>>      rustdoc-alloc rustdoc-kernel
>> -	$(Q)cp $(srctree)/Documentation/images/logo.svg $(objtree)/$(obj)/doc
>> -	$(Q)cp $(srctree)/Documentation/images/COPYING-logo $(objtree)/$(obj)/doc
>> -	$(Q)find $(objtree)/$(obj)/doc -name '*.html' -type f -print0 | xargs -0 sed -Ei \
>> +	$(Q)cp $(srctree)/Documentation/images/logo.svg $(RUSTDOC_OUTPUT)
>> +	$(Q)cp $(srctree)/Documentation/images/COPYING-logo $(RUSTDOC_OUTPUT)
>> +	$(Q)find $(RUSTDOC_OUTPUT) -name '*.html' -type f -print0 | xargs -0 sed -Ei \
>>  		-e 's:rust-logo\.svg:logo.svg:g' \
>>  		-e 's:rust-logo\.png:logo.svg:g' \
>>  		-e 's:favicon\.svg:logo.svg:g' \
>>  		-e 's:<link rel="alternate icon" type="image/png" href="[./]*favicon-(16x16|32x32)\.png">::g'
>>  	$(Q)echo '.logo-container > img { object-fit: contain; }' \
>> -		>> $(objtree)/$(obj)/doc/rustdoc.css
>> +		>> $(RUSTDOC_OUTPUT)/rustdoc.css
>>  
>>  rustdoc-macros: private rustdoc_host = yes
>>  rustdoc-macros: private rustc_target_flags = --crate-type proc-macro \
>> @@ -141,7 +144,7 @@ quiet_cmd_rustdoc_test = RUSTDOC T $<
>>  		@$(objtree)/include/generated/rustc_cfg \
>>  		$(rustc_target_flags) $(rustdoc_test_target_flags) \
>>  		--sysroot $(objtree)/$(obj)/test/sysroot $(rustdoc_test_quiet) \
>> -		-L$(objtree)/$(obj)/test --output $(objtree)/$(obj)/doc \
>> +		-L$(objtree)/$(obj)/test --output $(RUSTDOC_OUTPUT) \
>>  		--crate-name $(subst rusttest-,,$@) $<
>>  
>>  # We cannot use `-Zpanic-abort-tests` because some tests are dynamic,
> 

Thanks,
Carlos