Re: [PATCH v1 12/22] docs: driver-api: add .rst files from the main dir

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Em Wed, 19 Jun 2019 12:42:39 +0200
Peter Zijlstra <peterz@xxxxxxxxxxxxx> escreveu:

> On Wed, Jun 19, 2019 at 07:22:18AM -0300, Mauro Carvalho Chehab wrote:
> > Hi Daniel,
> > 
> > Em Wed, 19 Jun 2019 11:05:57 +0200
> > Daniel Vetter <daniel@xxxxxxxx> escreveu:
> >   
> > > On Tue, Jun 18, 2019 at 10:55 PM Mauro Carvalho Chehab
> > > <mchehab+samsung@xxxxxxxxxx> wrote:  
> > > > diff --git a/Documentation/gpu/drm-mm.rst b/Documentation/gpu/drm-mm.rst
> > > > index fa30dfcfc3c8..b0f948d8733b 100644
> > > > --- a/Documentation/gpu/drm-mm.rst
> > > > +++ b/Documentation/gpu/drm-mm.rst
> > > > @@ -320,7 +320,7 @@ struct :c:type:`struct file_operations <file_operations>` get_unmapped_area
> > > >  field with a pointer on :c:func:`drm_gem_cma_get_unmapped_area`.
> > > >
> > > >  More detailed information about get_unmapped_area can be found in
> > > > -Documentation/nommu-mmap.rst
> > > > +Documentation/driver-api/nommu-mmap.rst    
> > > 
> > > Random drive-by comment: Could we convert these into hyperlinks within
> > > sphinx somehow, without making them less useful as raw file references
> > > (with vim I can just type 'gf' and it works, emacs probably the same).
> > > -Daniel  
> > 
> > Short answer: I don't know how vim/emacs would recognize Sphinx tags.  
> 
> No, the other way around, Sphinx can recognize local files and treat
> them special. That way we keep the text readable.
> 
> Same with that :c:func:'foo' crap, that needs to die, and Sphinx needs
> to be taught about foo().

Just did a test today at Jon's extension (with is currently on a
separate branch). At least the version that it is there at his automarkup
branch still needs some work, as it currently breaks titles and tables:

	6.4 :c:func:`resync_start()`, :c:func:`resync_finish()`
	-----------------------------------
	/devel/v4l/docs/Documentation/driver-api/md/md-cluster.rst:323: WARNING: Title underline too short.


	/devel/v4l/docs/Documentation/driver-api/serial/tty.rst:74: WARNING: Malformed table.
	Text in column margin in table line 34.

	======================= =======================================================
	:c:func:`open()`                        Called when the line discipline is attached to

-

That's said, once it gets fixed to address those complex cases, a
regex like:

	\bDocumentation/([\w\d\-\_\/]+)\.rst\b

could be converted to :doc: tag. It should be smart enough to convert
the relative paths, as we refer to the files from the git root directory
(with makes a lot sense to me), while Sphinx :doc: use relative patches
from the location where the parsed file is.

Something like the enclosed patch.

Thanks,
Mauro

[PATCH] automarkup.py: convert Documentation/* to hyperlinks

Auto-create hyperlinks when it finds a Documentation/.. occurrence.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>

diff --git a/Documentation/sphinx/automarkup.py b/Documentation/sphinx/automarkup.py
index 39c8f4d5af82..9d6926b61241 100644
--- a/Documentation/sphinx/automarkup.py
+++ b/Documentation/sphinx/automarkup.py
@@ -9,6 +9,7 @@
 from __future__ import print_function
 import re
 import sphinx
+#import sys		# Just for debug
 
 #
 # Regex nastiness.  Of course.
@@ -31,10 +32,26 @@ RE_literal = re.compile(r'^(\s*)(.*::\s*|\.\.\s+code-block::.*)$')
 #
 RE_whitesp = re.compile(r'^(\s*)')
 
+#
+# Get a documentation reference
+#
+RE_doc_links = re.compile(r'\bDocumentation/([\w\d\-\_\/]+)\.rst\b')
+
+#
+# Doc link false-positives
+#
+RE_false_doc_links = re.compile(r':ref:`\s*Documentation/[\w\d\-\_\/]+\.rst')
+
 def MangleFile(app, docname, text):
     ret = [ ]
     previous = ''
     literal = False
+
+    rel_dir = ''
+
+    for depth in range(0, docname.count('/')):
+        rel_dir += "../"
+
     for line in text[0].split('\n'):
         #
         # See if we might be ending a literal block, as denoted by
@@ -63,7 +80,17 @@ def MangleFile(app, docname, text):
         # Normal line - perform substitutions.
         #
         else:
-            ret.append(RE_function.sub(r'\1:c:func:`\2`\3', line))
+            new_line = RE_function.sub(r'\1:c:func:`\2`\3', line)
+
+            if not RE_false_doc_links.search(new_line):
+                new_line = RE_doc_links.sub(r':doc:`' + rel_dir + r'\1`', new_line)
+
+ #           # Just for debug - should be removed on production
+ #           if new_line != line:
+ #               print ("===>" + new_line, file=sys.stderr)
+
+            ret.append(new_line)
+
         #
         # Might we be starting a literal block?  If so make note of
         # the fact.



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