Re: [PATCH 1/2] Documentation/sphinx: add "nodocs" directive

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On Mon, Jun 18, 2018 at 11:01:32PM +0300, Jani Nikula wrote:
> On Mon, 18 Jun 2018, Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx> wrote:
> > When kernel-doc:: specified in .rst document without explicit directives,
> > it outputs both comment and DOC: sections. If a DOC: section was explictly
> > included in the same document it will be duplicated. For example, the
> > output generated for Documentation/core-api/idr.rst [1] has "IDA
> > description" in the "IDA usage" section and in the middle of the API
> > reference.
> >
> > Addition of "nodocs" directive prevents the duplication without the need to
> > explicitly define what functions should be include in the API reference.
> >
> > [1] https://www.kernel.org/doc/html/v4.17/core-api/idr.html
> >
> > Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
> > ---
> >  Documentation/sphinx/kerneldoc.py | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/Documentation/sphinx/kerneldoc.py b/Documentation/sphinx/kerneldoc.py
> > index fbedcc3..bc5dd05 100644
> > --- a/Documentation/sphinx/kerneldoc.py
> > +++ b/Documentation/sphinx/kerneldoc.py
> > @@ -50,6 +50,7 @@ class KernelDocDirective(Directive):
> >          'functions': directives.unchanged_required,
> >          'export': directives.unchanged,
> >          'internal': directives.unchanged,
> > +        'nodocs': directives.unchanged,
> 
> I'm not convinved this is the prettiest way to achieve what you
> want. 'nodocs' seems kind of clunky.
> 
> I'd suggest supporting 'functions' without option arguments, and turning
> that into kernel-doc -no-doc-sections.

Do you mean something like this:

diff --git a/Documentation/sphinx/kerneldoc.py b/Documentation/sphinx/kerneldoc.py
index fbedcc3..9d0a7f0 100644
--- a/Documentation/sphinx/kerneldoc.py
+++ b/Documentation/sphinx/kerneldoc.py
@@ -47,7 +47,7 @@ class KernelDocDirective(Directive):
     optional_arguments = 4
     option_spec = {
         'doc': directives.unchanged_required,
-        'functions': directives.unchanged_required,
+        'functions': directives.unchanged,
         'export': directives.unchanged,
         'internal': directives.unchanged,
     }
@@ -75,8 +75,12 @@ class KernelDocDirective(Directive):
         elif 'doc' in self.options:
             cmd += ['-function', str(self.options.get('doc'))]
         elif 'functions' in self.options:
-            for f in str(self.options.get('functions')).split():
-                cmd += ['-function', f]
+            functions = self.options.get('functions').split()
+            if functions:
+                for f in functions:
+                    cmd += ['-function', f]
+            else:
+                cmd += ['-no-doc-sections']
 
         for pattern in export_file_patterns:
             for f in glob.glob(env.config.kerneldoc_srctree + '/' + pattern):

> The usage in patch 2/2 would turn into:
> 
> .. kernel-doc:: include/linux/idr.h
>    :functions:
> 
> which I think is much better overall in the rst source, complementing
> the places where you use :doc:.
> 
> BR,
> Jani.
> 
> >      }
> >      has_content = False
> >  
> > @@ -77,6 +78,8 @@ class KernelDocDirective(Directive):
> >          elif 'functions' in self.options:
> >              for f in str(self.options.get('functions')).split():
> >                  cmd += ['-function', f]
> > +        elif 'nodocs' in self.options:
> > +            cmd += ['-no-doc-sections']
> >  
> >          for pattern in export_file_patterns:
> >              for f in glob.glob(env.config.kerneldoc_srctree + '/' + pattern):
> 
> -- 
> Jani Nikula, Intel Open Source Graphics Center
> 

-- 
Sincerely yours,
Mike.

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