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Message-ID: <423d8460d5fa040d2499b5a5af341e2dc1377881.1756215924.git.mchehab+huawei@kernel.org>
Date: Tue, 26 Aug 2025 15:49:04 +0200
From: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To: Linux Doc Mailing List <linux-doc@...r.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
"Jonathan Corbet" <corbet@....net>,
"Mauro Carvalho Chehab" <mchehab+huawei@...nel.org>,
Thomas Weißschuh <thomas.weissschuh@...utronix.de>,
Alice Ryhl <aliceryhl@...gle.com>,
Masahiro Yamada <mchehab+huawei@...nel.org>,
Miguel Ojeda <mchehab+huawei@...nel.org>,
Nathan Chancellor <mchehab+huawei@...nel.org>,
Nicolas Schier <nicolas.schier@...ux.dev>,
Randy Dunlap <rdunlap@...radead.org>,
Tamir Duberstein <tamird@...il.com>,
linux-kbuild@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] docs: add support to build manpages from kerneldoc output
Generating man files currently requires running a separate
script. The target also doesn't appear at the docs Makefile.
Add support for mandocs at the Makefile, adding the build
logic inside sphinx-build-wrapper, updating documentation
and dropping the ancillary script.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
Documentation/Makefile | 3 +-
Documentation/doc-guide/kernel-doc.rst | 19 ++-----
Makefile | 2 +-
scripts/split-man.pl | 28 ----------
tools/docs/sphinx-build-wrapper | 77 ++++++++++++++++++++++++--
5 files changed, 80 insertions(+), 49 deletions(-)
delete mode 100755 scripts/split-man.pl
diff --git a/Documentation/Makefile b/Documentation/Makefile
index 3e1cb44a5fbb..22e39e5ed07d 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -53,7 +53,7 @@ ifeq ($(HAVE_SPHINX),0)
else # HAVE_SPHINX
# Common documentation targets
-infodocs texinfodocs latexdocs epubdocs xmldocs pdfdocs linkcheckdocs:
+mandocs infodocs texinfodocs latexdocs epubdocs xmldocs pdfdocs linkcheckdocs:
$(Q)@$(srctree)/tools/docs/sphinx-pre-install --version-check
+$(Q)$(PYTHON3) $(BUILD_WRAPPER) $@ \
--sphinxdirs="$(SPHINXDIRS)" --conf=$(SPHINX_CONF) \
@@ -104,6 +104,7 @@ dochelp:
@echo ' htmldocs - HTML'
@echo ' texinfodocs - Texinfo'
@echo ' infodocs - Info'
+ @echo ' mandocs - Man pages'
@echo ' latexdocs - LaTeX'
@echo ' pdfdocs - PDF'
@echo ' epubdocs - EPUB'
diff --git a/Documentation/doc-guide/kernel-doc.rst b/Documentation/doc-guide/kernel-doc.rst
index af9697e60165..d85dcb08c87d 100644
--- a/Documentation/doc-guide/kernel-doc.rst
+++ b/Documentation/doc-guide/kernel-doc.rst
@@ -579,20 +579,9 @@ source.
How to use kernel-doc to generate man pages
-------------------------------------------
-If you just want to use kernel-doc to generate man pages you can do this
-from the kernel git tree::
+Generating man pages is a makefile target. Just run::
- $ scripts/kernel-doc -man \
- $(git grep -l '/\*\*' -- :^Documentation :^tools) \
- | scripts/split-man.pl /tmp/man
+ $ make mandocs
-Some older versions of git do not support some of the variants of syntax for
-path exclusion. One of the following commands may work for those versions::
-
- $ scripts/kernel-doc -man \
- $(git grep -l '/\*\*' -- . ':!Documentation' ':!tools') \
- | scripts/split-man.pl /tmp/man
-
- $ scripts/kernel-doc -man \
- $(git grep -l '/\*\*' -- . ":(exclude)Documentation" ":(exclude)tools") \
- | scripts/split-man.pl /tmp/man
+The output will be at ``/man`` directory inside the output directory
+(by default: ``Documentation/output``).
diff --git a/Makefile b/Makefile
index 6bfe776bf3c5..9bd44afeda26 100644
--- a/Makefile
+++ b/Makefile
@@ -1800,7 +1800,7 @@ $(help-board-dirs): help-%:
# Documentation targets
# ---------------------------------------------------------------------------
DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
- linkcheckdocs dochelp refcheckdocs texinfodocs infodocs
+ linkcheckdocs dochelp refcheckdocs texinfodocs infodocs mandocs
PHONY += $(DOC_TARGETS)
$(DOC_TARGETS):
$(Q)$(MAKE) $(build)=Documentation $@
diff --git a/scripts/split-man.pl b/scripts/split-man.pl
deleted file mode 100755
index 96bd99dc977a..000000000000
--- a/scripts/split-man.pl
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/usr/bin/env perl
-# SPDX-License-Identifier: GPL-2.0
-#
-# Author: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
-#
-# Produce manpages from kernel-doc.
-# See Documentation/doc-guide/kernel-doc.rst for instructions
-
-if ($#ARGV < 0) {
- die "where do I put the results?\n";
-}
-
-mkdir $ARGV[0],0777;
-$state = 0;
-while (<STDIN>) {
- if (/^\.TH \"[^\"]*\" 9 \"([^\"]*)\"/) {
- if ($state == 1) { close OUT }
- $state = 1;
- $fn = "$ARGV[0]/$1.9";
- print STDERR "Creating $fn\n";
- open OUT, ">$fn" or die "can't open $fn: $!\n";
- print OUT $_;
- } elsif ($state != 0) {
- print OUT $_;
- }
-}
-
-close OUT;
diff --git a/tools/docs/sphinx-build-wrapper b/tools/docs/sphinx-build-wrapper
index eaca0900bd5c..2f06df744e27 100755
--- a/tools/docs/sphinx-build-wrapper
+++ b/tools/docs/sphinx-build-wrapper
@@ -79,6 +79,7 @@ TARGETS = {
"epubdocs": { "builder": "epub", "out_dir": "epub" },
"texinfodocs": { "builder": "texinfo", "out_dir": "texinfo" },
"infodocs": { "builder": "texinfo", "out_dir": "texinfo" },
+ "mandocs": { "builder": "man", "out_dir": "man" },
"latexdocs": { "builder": "latex", "out_dir": "latex" },
"pdfdocs": { "builder": "latex", "out_dir": "latex" },
"xmldocs": { "builder": "xml", "out_dir": "xml" },
@@ -458,6 +459,71 @@ class SphinxBuilder:
except subprocess.CalledProcessError as e:
sys.exit(f"Error generating info docs: {e}")
+ def handle_man(self, kerneldoc, docs_dir, src_dir, output_dir):
+ """
+ Create man pages from kernel-doc output
+ """
+
+ re_kernel_doc = re.compile(r"^\.\.\s+kernel-doc::\s*(\S+)")
+ re_man = re.compile(r'^\.TH "[^"]*" (\d+) "([^"]*)"')
+
+ if docs_dir == src_dir:
+ #
+ # Pick the entire set of kernel-doc markups from the entire tree
+ #
+ kdoc_files = set([self.srctree])
+ else:
+ kdoc_files = set()
+
+ for fname in glob(os.path.join(src_dir, "**"), recursive=True):
+ if os.path.isfile(fname) and fname.endswith(".rst"):
+ with open(fname, "r", encoding="utf-8") as in_fp:
+ data = in_fp.read()
+
+ for line in data.split("\n"):
+ match = re_kernel_doc.match(line)
+ if match:
+ if os.path.isfile(match.group(1)):
+ kdoc_files.add(match.group(1))
+
+ if not kdoc_files:
+ sys.exit(f"Directory {src_dir} doesn't contain kernel-doc tags")
+
+ cmd = [ kerneldoc, "-m" ] + sorted(kdoc_files)
+ try:
+ if self.verbose:
+ print(" ".join(cmd))
+
+ result = subprocess.run(cmd, stdout=subprocess.PIPE, text= True)
+
+ if result.returncode:
+ print(f"Warning: kernel-doc returned {result.returncode} warnings")
+
+ except (OSError, ValueError, subprocess.SubprocessError) as e:
+ sys.exit(f"Failed to create man pages for {src_dir}: {repr(e)}")
+
+ fp = None
+ try:
+ for line in result.stdout.split("\n"):
+ match = re_man.match(line)
+ if not match:
+ if fp:
+ fp.write(line + '\n')
+ continue
+
+ if fp:
+ fp.close()
+
+ fname = f"{output_dir}/{match.group(2)}.{match.group(1)}"
+
+ if self.verbose:
+ print(f"Creating {fname}")
+ fp = open(fname, "w", encoding="utf-8")
+ fp.write(line + '\n')
+ finally:
+ if fp:
+ fp.close()
+
def cleandocs(self, builder):
shutil.rmtree(self.builddir, ignore_errors=True)
@@ -574,10 +640,13 @@ class SphinxBuilder:
output_dir,
]
- try:
- self.run_sphinx(sphinxbuild, build_args, env=self.env)
- except (OSError, ValueError, subprocess.SubprocessError) as e:
- sys.exit(f"Build failed: {repr(e)}")
+ if target == "mandocs":
+ self.handle_man(kerneldoc, docs_dir, src_dir, output_dir)
+ else:
+ try:
+ self.run_sphinx(sphinxbuild, build_args, env=self.env)
+ except (OSError, ValueError, subprocess.SubprocessError) as e:
+ sys.exit(f"Build failed: {repr(e)}")
#
# Ensure that each html/epub output will have needed static files
--
2.51.0
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