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.
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 | 15 ++++++++++++++-
scripts/kernel-doc | 23 +++++++++++++++++++++++
2 files changed, 37 insertions(+), 1 deletion(-)
diff --git a/Documentation/sphinx/kernel-doc.py b/Documentation/sphinx/kernel-doc.py
index bd422870101e..246f49aad022 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
@@ -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
diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 4da6f952d18b..b58264124aba 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -411,13 +411,16 @@ my $doc_inline_end = '^\s*\*/\s*$';
my $export_symbol = '^\s*EXPORT_SYMBOL(_GPL)?\s*\(\s*(\w+)\s*\)\s*;';
my %parameterdescs;
+my %parameterdesc_start_lines;
my @parameterlist;
my %sections;
my @sectionlist;
+my %section_start_lines;
my $sectcheck;
my $struct_actual;
my $contents = "";
+my $new_start_line = 0;
# the canonical section names. see also $doc_sect above.
my $section_default = "Description"; # default section
@@ -516,11 +519,15 @@ sub dump_section {
$name = $1;
$parameterdescs{$name} = $contents;
$sectcheck = $sectcheck . $name . " ";
+ $parameterdesc_start_lines{$name} = $new_start_line;
+ $new_start_line = 0;
} elsif ($name eq "@\.\.\.") {
# print STDERR "parameter def '...' = '$contents'\n";
$name = "...";
$parameterdescs{$name} = $contents;
$sectcheck = $sectcheck . $name . " ";
+ $parameterdesc_start_lines{$name} = $new_start_line;
+ $new_start_line = 0;
} else {
# print STDERR "other section '$name' = '$contents'\n";
if (defined($sections{$name}) && ($sections{$name} ne "")) {
@@ -530,6 +537,8 @@ sub dump_section {
} else {
$sections{$name} = $contents;
push @sectionlist, $name;
+ $section_start_lines{$name} = $new_start_line;
+ $new_start_line = 0;
}
}
}
@@ -1775,6 +1784,7 @@ sub output_blockhead_rst(%) {
if ($output_selection != OUTPUT_INCLUDE) {
print "**$section**\n\n";
}
+ print "#define LINENO " . $section_start_lines{$section} . "\n";
output_highlight_rst($args{'sections'}{$section});
print "\n";
}
@@ -1840,6 +1850,11 @@ sub output_function_rst(%) {
} else {
print "``$parameter``\n";
}
+
+ if (defined($parameterdesc_start_lines{$parameter_name})) {
+ print "#define LINENO " . $parameterdesc_start_lines{$parameter_name}. "\n";
+ }
+
if (defined($args{'parameterdescs'}{$parameter_name}) &&
$args{'parameterdescs'}{$parameter_name} ne $undescribed) {
output_highlight_rst($args{'parameterdescs'}{$parameter_name});
@@ -1861,6 +1876,7 @@ sub output_section_rst(%) {
foreach $section (@{$args{'sectionlist'}}) {
print "**$section**\n\n";
+ print "#define LINENO " . $section_start_lines{$section} . "\n";
output_highlight_rst($args{'sections'}{$section});
print "\n";
}
@@ -1958,6 +1974,7 @@ sub output_struct_rst(%) {
($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
$type = $args{'parametertypes'}{$parameter};
+ print "#define LINENO " . $parameterdesc_start_lines{$parameter_name}. "\n";
print "``$type $parameter``\n";
output_highlight_rst($args{'parameterdescs'}{$parameter_name});
print "\n";
@@ -2745,11 +2762,14 @@ sub process_file($) {
if (/$doc_start/o) {
$state = STATE_NAME; # next line is always the function name
$in_doc_sect = 0;
+ print "#define LINENO " . $. . "\n";
}
} elsif ($state == STATE_NAME) {# this line is the function name (always)
if (/$doc_block/o) {
$state = STATE_DOCBLOCK;
$contents = "";
+ $new_start_line = $. + 1;
+
if ( $1 eq "" ) {
$section = $section_intro;
} else {
@@ -2833,6 +2853,7 @@ sub process_file($) {
$in_doc_sect = 1;
$in_purpose = 0;
$contents = $newcontents;
+ $new_start_line = $.;
while ((substr($contents, 0, 1) eq " ") ||
substr($contents, 0, 1) eq "\t") {
$contents = substr($contents, 1);
@@ -2866,6 +2887,7 @@ sub process_file($) {
dump_section($file, $section, xml_escape($contents));
$section = $section_default;
$contents = "";
+ $new_start_line = $.;
} else {
$contents .= "\n";
}
@@ -2900,6 +2922,7 @@ sub process_file($) {
if ($inline_doc_state == STATE_INLINE_NAME && /$doc_inline_sect/o) {
$section = $1;
$contents = $2;
+ $new_start_line = $.;
if ($contents ne "") {
while ((substr($contents, 0, 1) eq " ") ||
substr($contents, 0, 1) eq "\t") {
--
2.8.1
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