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Message-ID: <cover.1758111077.git.mchehab+huawei@kernel.org>
Date: Wed, 17 Sep 2025 14:14:54 +0200
From: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To: Jonathan Corbet <corbet@....net>,
Linux Doc Mailing List <linux-doc@...r.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
linux-kernel@...r.kernel.org,
Akira Yokosawa <akiyks@...il.com>,
Björn Roy Baron <bjorn3_gh@...tonmail.com>,
Thomas Weißschuh <thomas.weissschuh@...utronix.de>,
Alex Gaynor <alex.gaynor@...il.com>,
Alex Shi <mchehab+huawei@...nel.org>,
Alice Ryhl <aliceryhl@...gle.com>,
Andreas Hindborg <mchehab+huawei@...nel.org>,
Benno Lossin <mchehab+huawei@...nel.org>,
Bill Wendling <morbo@...gle.com>,
Boqun Feng <boqun.feng@...il.com>,
Danilo Krummrich <mchehab+huawei@...nel.org>,
Dongliang Mu <dzm91@...t.edu.cn>,
Federico Vaga <federico.vaga@...a.pv.it>,
Gary Guo <gary@...yguo.net>,
Justin Stitt <justinstitt@...gle.com>,
Masahiro Yamada <mchehab+huawei@...nel.org>,
Miguel Ojeda <mchehab+huawei@...nel.org>,
Nathan Chancellor <mchehab+huawei@...nel.org>,
Nick Desaulniers <nick.desaulniers+lkml@...il.com>,
Nicolas Schier <nicolas.schier@...ux.dev>,
Randy Dunlap <rdunlap@...radead.org>,
Tamir Duberstein <tamird@...il.com>,
Trevor Gross <tmgross@...ch.edu>,
Yanteng Si <si.yanteng@...ux.dev>,
linux-kbuild@...r.kernel.org,
llvm@...ts.linux.dev,
rust-for-linux@...r.kernel.org
Subject: [PATCH v7 00/24] Split sphinx call logic from docs Makefile
Hi Jon,
This series should probably be called:
"Move the trick-or-treat build hacks accumulated over time
into a single place and document them."
as this reflects its main goal. As such:
- it places the jobserver logic on a library;
- it removes sphinx/parallel-wrapper.sh;
- the code now properly implements a jobserver-aware logic
to do the parallelism when called via GNU make, failing back to
"-j" when there's no jobserver;
- converts check-variable-fonts.sh to Python and uses it via
function call;
- drops an extra script to generate man pages, adding a makefile
target for it;
- ensures that return code is 0 when PDF successfully builds;
- about half of the script is comments and documentation.
I tried to do my best to document all tricks that are inside the
script. This way, the docs build steps is now documented.
It should be noticed that it is out of the scope of this series
to change the implementation. Surely the process can be improved,
but first let's consolidate and document everything on a single
place.
Such script was written in a way that it can be called either
directly or via a Makefile. Running outside Makefile is
interesting specially when debug is needed. The command line
interface replaces the need of having lots of env vars before
calling sphinx-build:
$ ./tools/docs/sphinx-build-wrapper --help
usage: sphinx-build-wrapper [-h]
[--sphinxdirs SPHINXDIRS [SPHINXDIRS ...]] [--conf CONF]
[--builddir BUILDDIR] [--theme THEME] [--css CSS] [--paper {,a4,letter}] [-v]
[-j JOBS] [-i] [-V [VENV]]
{cleandocs,linkcheckdocs,htmldocs,epubdocs,texinfodocs,infodocs,mandocs,latexdocs,pdfdocs,xmldocs}
Kernel documentation builder
positional arguments:
{cleandocs,linkcheckdocs,htmldocs,epubdocs,texinfodocs,infodocs,mandocs,latexdocs,pdfdocs,xmldocs}
Documentation target to build
options:
-h, --help show this help message and exit
--sphinxdirs SPHINXDIRS [SPHINXDIRS ...]
Specific directories to build
--conf CONF Sphinx configuration file
--builddir BUILDDIR Sphinx configuration file
--theme THEME Sphinx theme to use
--css CSS Custom CSS file for HTML/EPUB
--paper {,a4,letter} Paper size for LaTeX/PDF output
-v, --verbose place build in verbose mode
-j, --jobs JOBS Sets number of jobs to use with sphinx-build
-i, --interactive Change latex default to run in interactive mode
-V, --venv [VENV] If used, run Sphinx from a venv dir (default dir: sphinx_latest)
the only mandatory argument is the target, which is identical with
"make" targets.
The call inside Makefile doesn't use the last four arguments. They're
there to help identifying problems at the build:
-v makes the output verbose;
-j helps to test parallelism;
-i runs latexmk in interactive mode, allowing to debug PDF
build issues;
-V is useful when testing it with different venvs.
When used with GNU make (or some other make which implements jobserver),
a call like:
make -j <targets> htmldocs
will make the wrapper to automatically use POSIX jobserver to claim
the number of available job slots, calling sphinx-build with a
"-j" parameter reflecting it. ON such case, the default can be
overriden via SPHINXDIRS argument.
Visiable changes when compared with the old behavior:
When V=0, the only visible difference is that:
- pdfdocs target now returns 0 on success, 1 on failures.
This addresses an issue over the current process where we
it always return success even on failures;
- it will now print the name of PDF files that failed to build,
if any.
In verbose mode, sphinx-build-wrapper and sphinx-build command lines
are now displayed.
---
v7:
- added a --help option to ./tools/docs/check-variable-fonts.py;
- document FONTS_CONF_DENY_VF=;
- moved the python_version changes to be earlier in the series,
before moving it to a separate library, as suggested by Jani;
- added a --rustdoc to the wrapper, cleaning up Makefile
even further;
- solved some problems related to DENY_VF logic.
v6:
- On success, PDF output is identical as before when V=0;
- when V=1 is used, PDF output will print a build summary,
as on v5;
- solved a problem when multiple PDF files have the same
basename but are located on different directories;
- merged a patch series converting check-variable-fonts.sh
to Python. Its logic is now called directly without running
a subprocess.
- venv patch moved to the end.
v5:
- merged comments with the script;
- placed n_jobs on a separate function;
- nitpick: dropped a for loop used instead of list append.
v4:
- updated references for sphinx-pre-install after its rename;
- added some extra patches to add more options to python_version,
allowing it to bail out and suggest alternatives;
- added a patch at the end to explicitly break doc builds when
python3 points to python3.6 or older.
v3:
- rebased on the top of docs-next;
- added two patches to build man files that were on a separate
patch series.
v2:
- there's no generic exception handler anymore;
- it moves sphinx-pre-install to tools/docs;
- the logic which ensures a minimal Python version got moved
to a library, which is now used by both pre-install and wrapper;
- The first wrapper (05/13) doesn't contain comments (except for
shebang and SPDX). The goal is to help showing the size increase
when moving from Makefile to Python. Some file increase is
unavoidable, as Makefile is more compact: no includes, multple
statements per line, no argparse, etc;
- The second patch adds docstrings and comments. It has almost
the same size of the code itself;
- I moved the venv logic to a third wrapper patch;
- I fixed an issue at the paraller build logic;
- There are no generic except blocks anymore.
Mauro Carvalho Chehab (24):
scripts/jobserver-exec: move the code to a class
scripts/jobserver-exec: move its class to the lib directory
scripts/jobserver-exec: add a help message
scripts: check-variable-fonts.sh: convert to Python
tools/docs: check-variable-fonts.py: split into a lib and an exec file
check-variable-fonts.py: add a helper to display instructions
scripts: sphinx-pre-install: move it to tools/docs
tools/docs: sphinx-pre-install: drop a debug print
tools/docs: sphinx-pre-install: allow check for alternatives and bail
out
tools/docs: python_version: move version check from sphinx-pre-install
tools/docs: sphinx-build-wrapper: add a wrapper for sphinx-build
docs: parallel-wrapper.sh: remove script
docs: Makefile: document latex/PDF PAPER= parameter
docs: Makefile: document FONTS_CONF_DENY_VF= parameter
tools/docs: sphinx-build-wrapper: add an argument for LaTeX
interactive mode
tools/docs: sphinx-build-wrapper: allow building PDF files in parallel
tools/docs,scripts: sphinx-*: prevent sphinx-build crashes
tools/docs: sphinx-build-wrapper: Fix output for duplicated names
docs: add support to build manpages from kerneldoc output
tools: kernel-doc: add a see also section at man pages
scripts: kdoc_parser.py: warn about Python version only once
tools/docs: sphinx-build-wrapper: move rust doc builder to wrapper
tools/docs: sphinx-* break documentation bulds on openSUSE
tools/docs: sphinx-build-wrapper: add support to run inside venv
Documentation/Makefile | 144 +---
Documentation/doc-guide/kernel-doc.rst | 29 +-
Documentation/doc-guide/sphinx.rst | 4 +-
Documentation/sphinx/kerneldoc-preamble.sty | 2 +-
Documentation/sphinx/parallel-wrapper.sh | 33 -
.../translations/it_IT/doc-guide/sphinx.rst | 4 +-
.../translations/zh_CN/doc-guide/sphinx.rst | 4 +-
Documentation/translations/zh_CN/how-to.rst | 2 +-
MAINTAINERS | 4 +-
Makefile | 2 +-
scripts/check-variable-fonts.sh | 115 ---
scripts/jobserver-exec | 88 +-
scripts/lib/jobserver.py | 149 ++++
scripts/lib/kdoc/kdoc_files.py | 5 +-
scripts/lib/kdoc/kdoc_output.py | 84 +-
scripts/lib/kdoc/kdoc_parser.py | 7 +-
scripts/split-man.pl | 28 -
tools/docs/check-variable-fonts.py | 30 +
tools/docs/lib/latex_fonts.py | 166 ++++
tools/docs/lib/python_version.py | 178 ++++
tools/docs/sphinx-build-wrapper | 816 ++++++++++++++++++
{scripts => tools/docs}/sphinx-pre-install | 135 +--
22 files changed, 1536 insertions(+), 493 deletions(-)
delete mode 100644 Documentation/sphinx/parallel-wrapper.sh
delete mode 100755 scripts/check-variable-fonts.sh
create mode 100755 scripts/lib/jobserver.py
delete mode 100755 scripts/split-man.pl
create mode 100755 tools/docs/check-variable-fonts.py
create mode 100755 tools/docs/lib/latex_fonts.py
create mode 100644 tools/docs/lib/python_version.py
create mode 100755 tools/docs/sphinx-build-wrapper
rename {scripts => tools/docs}/sphinx-pre-install (93%)
--
2.51.0
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