Design is pretty simple: kernel-doc inserts breadcrumbs with line
numbers, and sphinx picks them up. At first I went with a sphinx
comment, but inserting those at random places seriously upsets the
parser, and must be filtered. Hence why this version now uses "#define
LINEO " since one of these ever escape into output it's pretty clear
there is a bug.
It seems to work well, and at least the 2-3 errors where sphinx
complained about something that was not correct in kernel-doc text the
line numbers matched up perfectly.
v2: Instead of noodling around in the parser state machine, create
a ViewList and parse it ourselves. This seems to be the recommended
way, per Jani's suggestion.
v3:
- Split out ViewList pach. Splitting the kernel-doc changes from the
sphinx ones isn't possible, since emitting the LINENO lines wreaks
havoc with the rst formatting. We must filter them.
- Improve the regex per Jani's suggestions, and compile it just once
for speed.
- Now that LINENO lines are eaten, also add them to function parameter
descriptions. Much less content and offset than for in-line struct
member descriptions, but still nice to know which exact continuation
line upsets sphinx.
- Simplify/clarify the line +/-1 business a bit.
v4: Split out the scripts/kernel-doc changes and make line-numbers
opt-in, as suggested by Jani.
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: linux-doc@xxxxxxxxxxxxxxx
Cc: Jonathan Corbet <corbet@xxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
---
Documentation/sphinx/kernel-doc.py | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/Documentation/sphinx/kernel-doc.py b/Documentation/sphinx/kernel-doc.py
index bd422870101e..4adfb0e91ecc 100644
--- a/Documentation/sphinx/kernel-doc.py
+++ b/Documentation/sphinx/kernel-doc.py
@@ -30,6 +30,7 @@
import os
import subprocess
import sys
+import re
from docutils import nodes, statemachine
from docutils.statemachine import ViewList
@@ -50,7 +51,7 @@ class KernelDocDirective(Directive):
def run(self):
env = self.state.document.settings.env
- cmd = [env.config.kerneldoc_bin, '-rst']
+ cmd = [env.config.kerneldoc_bin, '-rst', '-enable-lineno']
filename = env.config.kerneldoc_srctree + '/' + self.arguments[0]
@@ -93,7 +94,19 @@ class KernelDocDirective(Directive):
sys.stderr.write(err)
lines = statemachine.string2lines(out, tab_width, convert_whitespace=True)
- result = ViewList(lines, source)
+ result = ViewList()
+
+ lineoffset = 0;
+ line_regex = re.compile("^#define LINENO ([0-9]+)$")
+ for line in lines:
+ match = line_regex.search(line)
+ if match:
+ # sphinx counts lines from 0
+ lineoffset = int(match.group(1)) - 1
+ # we must eat our comments since the upset the markup
+ else:
+ result.append(line, source, lineoffset)
+ lineoffset += 1
node = nodes.section()
node.document = self.state.document
--
2.8.1
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