* [PATCH v2 00/13] Split sphinx call logic from docs Makefile
@ 2025-08-25 16:30 Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 01/13] scripts/jobserver-exec: move the code to a class Mauro Carvalho Chehab
` (12 more replies)
0 siblings, 13 replies; 14+ messages in thread
From: Mauro Carvalho Chehab @ 2025-08-25 16:30 UTC (permalink / raw)
To: Linux Doc Mailing List
Cc: Mauro Carvalho Chehab, Mauro Carvalho Chehab, linux-kernel,
Jonathan Corbet, Björn Roy Baron, Alex Gaynor, Alice Ryhl,
Andreas Hindborg, Benno Lossin, Boqun Feng, Danilo Krummrich,
Gary Guo, Miguel Ojeda, Trevor Gross, rust-for-linux
Hi Jon,
This series does a major cleanup at docs Makefile by moving the
actual doc build logic to a helper script (scripts/sphinx-build-wrapper).
Such script was written in a way that it can be called either
directly or via a makefile. When running via makefile, it will
use GNU jobserver to ensure that, when sphinx-build is
called, the number of jobs will match at most what it is
specified by the "-j" parameter.
The first 3 patches do a cleanup at scripts/jobserver-exec
and moves the actual code to a library. Such library is used
by both the jobserver-exec command line and by sphinx-build-wrappper.
The change also gets rid of parallel-wrapper.sh, whose
functions are now part of the wrapper code.
This series is now on top of:
https://lore.kernel.org/linux-doc/0ad4fefca2855603c66d513474a687058e780931@intel.com/
As I'm expecting that the oner one (although it is bigger)
won't cause too much noise, as it impacts only the media builds,
and remove a hack that would otherwise require some code here.
While version 2 has the same features and almost the same code,
I did some changes to make easier to review:
- 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 (13):
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: sphinx-pre-install: move it to tools/docs
tools/docs: sphinx-pre-install: move Python version handling to lib
tools/docs: sphinx-build-wrapper: add a wrapper for sphinx-build
tools/docs: sphinx-build-wrapper: add comments and blank lines
tools/docs: sphinx-build-wrapper: add support to run inside venv
docs: parallel-wrapper.sh: remove script
docs: Makefile: document latex/PDF PAPER= parameter
tools/docs: sphinx-build-wrapper: add an argument for LaTeX
interactive mode
tools/docs,scripts: sphinx-*: prevent sphinx-build crashes
tools/docs: sphinx-build-wrapper: allow building PDF files in parallel
Documentation/Makefile | 133 +----
Documentation/sphinx/parallel-wrapper.sh | 33 --
scripts/jobserver-exec | 88 +--
scripts/lib/jobserver.py | 149 +++++
tools/docs/lib/python_version.py | 133 +++++
tools/docs/sphinx-build-wrapper | 660 +++++++++++++++++++++
{scripts => tools/docs}/sphinx-pre-install | 134 +----
7 files changed, 1022 insertions(+), 308 deletions(-)
delete mode 100644 Documentation/sphinx/parallel-wrapper.sh
create mode 100755 scripts/lib/jobserver.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
^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH v2 01/13] scripts/jobserver-exec: move the code to a class
2025-08-25 16:30 [PATCH v2 00/13] Split sphinx call logic from docs Makefile Mauro Carvalho Chehab
@ 2025-08-25 16:30 ` Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 02/13] scripts/jobserver-exec: move its class to the lib directory Mauro Carvalho Chehab
` (11 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Mauro Carvalho Chehab @ 2025-08-25 16:30 UTC (permalink / raw)
To: Linux Doc Mailing List
Cc: Mauro Carvalho Chehab, Jonathan Corbet, Mauro Carvalho Chehab,
linux-kernel
Convert the code inside jobserver-exec to a class and
properly document it.
Using a class allows reusing the jobserver logic on other
scripts.
While the main code remains unchanged, being compatible with
Python 2.6 and 3.0+, its coding style now follows a more
modern standard, having tabs replaced by a 4-spaces
indent, passing autopep8, black and pylint.
The code now allows allows using a pythonic way to
enter/exit a python code, e.g. it now supports:
with JobserverExec() as jobserver:
jobserver.run(sys.argv[1:])
With the new code, the __exit__() function should ensure
that the jobserver slot will be closed at the end, even if
something bad happens somewhere.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
scripts/jobserver-exec | 218 ++++++++++++++++++++++++++++-------------
1 file changed, 151 insertions(+), 67 deletions(-)
diff --git a/scripts/jobserver-exec b/scripts/jobserver-exec
index 7eca035472d3..b386b1a845de 100755
--- a/scripts/jobserver-exec
+++ b/scripts/jobserver-exec
@@ -1,77 +1,161 @@
#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0+
#
+# pylint: disable=C0103,C0209
+#
# This determines how many parallel tasks "make" is expecting, as it is
# not exposed via an special variables, reserves them all, runs a subprocess
# with PARALLELISM environment variable set, and releases the jobs back again.
#
# https://www.gnu.org/software/make/manual/html_node/POSIX-Jobserver.html#POSIX-Jobserver
-from __future__ import print_function
-import os, sys, errno
+
+"""
+Interacts with the POSIX jobserver during the Kernel build time.
+
+A "normal" jobserver task, like the one initiated by a make subrocess would do:
+
+ - open read/write file descriptors to communicate with the job server;
+ - ask for one slot by calling:
+ claim = os.read(reader, 1)
+ - when the job finshes, call:
+ os.write(writer, b"+") # os.write(writer, claim)
+
+Here, the goal is different: This script aims to get the remaining number
+of slots available, using all of them to run a command which handle tasks in
+parallel. To to that, it has a loop that ends only after there are no
+slots left. It then increments the number by one, in order to allow a
+call equivalent to make -j$((claim+1)), e.g. having a parent make creating
+$claim child to do the actual work.
+
+The end goal here is to keep the total number of build tasks under the
+limit established by the initial make -j$n_proc call.
+"""
+
+import errno
+import os
import subprocess
+import sys
-# Extract and prepare jobserver file descriptors from environment.
-claim = 0
-jobs = b""
-try:
- # Fetch the make environment options.
- flags = os.environ['MAKEFLAGS']
-
- # Look for "--jobserver=R,W"
- # Note that GNU Make has used --jobserver-fds and --jobserver-auth
- # so this handles all of them.
- opts = [x for x in flags.split(" ") if x.startswith("--jobserver")]
-
- # Parse out R,W file descriptor numbers and set them nonblocking.
- # If the MAKEFLAGS variable contains multiple instances of the
- # --jobserver-auth= option, the last one is relevant.
- fds = opts[-1].split("=", 1)[1]
-
- # Starting with GNU Make 4.4, named pipes are used for reader and writer.
- # Example argument: --jobserver-auth=fifo:/tmp/GMfifo8134
- _, _, path = fds.partition('fifo:')
-
- if path:
- reader = os.open(path, os.O_RDONLY | os.O_NONBLOCK)
- writer = os.open(path, os.O_WRONLY)
- else:
- reader, writer = [int(x) for x in fds.split(",", 1)]
- # Open a private copy of reader to avoid setting nonblocking
- # on an unexpecting process with the same reader fd.
- reader = os.open("/proc/self/fd/%d" % (reader),
- os.O_RDONLY | os.O_NONBLOCK)
-
- # Read out as many jobserver slots as possible.
- while True:
- try:
- slot = os.read(reader, 8)
- jobs += slot
- except (OSError, IOError) as e:
- if e.errno == errno.EWOULDBLOCK:
- # Stop at the end of the jobserver queue.
- break
- # If something went wrong, give back the jobs.
- if len(jobs):
- os.write(writer, jobs)
- raise e
- # Add a bump for our caller's reserveration, since we're just going
- # to sit here blocked on our child.
- claim = len(jobs) + 1
-except (KeyError, IndexError, ValueError, OSError, IOError) as e:
- # Any missing environment strings or bad fds should result in just
- # not being parallel.
- pass
-
-# We can only claim parallelism if there was a jobserver (i.e. a top-level
-# "-jN" argument) and there were no other failures. Otherwise leave out the
-# environment variable and let the child figure out what is best.
-if claim > 0:
- os.environ['PARALLELISM'] = '%d' % (claim)
-
-rc = subprocess.call(sys.argv[1:])
-
-# Return all the reserved slots.
-if len(jobs):
- os.write(writer, jobs)
-
-sys.exit(rc)
+
+class JobserverExec:
+ """
+ Claim all slots from make using POSIX Jobserver.
+
+ The main methods here are:
+ - open(): reserves all slots;
+ - close(): method returns all used slots back to make;
+ - run(): executes a command setting PARALLELISM=<available slots jobs + 1>
+ """
+
+ def __init__(self):
+ """Initialize internal vars"""
+ self.claim = 0
+ self.jobs = b""
+ self.reader = None
+ self.writer = None
+ self.is_open = False
+
+ def open(self):
+ """Reserve all available slots to be claimed later on"""
+
+ if self.is_open:
+ return
+
+ try:
+ # Fetch the make environment options.
+ flags = os.environ["MAKEFLAGS"]
+ # Look for "--jobserver=R,W"
+ # Note that GNU Make has used --jobserver-fds and --jobserver-auth
+ # so this handles all of them.
+ opts = [x for x in flags.split(" ") if x.startswith("--jobserver")]
+
+ # Parse out R,W file descriptor numbers and set them nonblocking.
+ # If the MAKEFLAGS variable contains multiple instances of the
+ # --jobserver-auth= option, the last one is relevant.
+ fds = opts[-1].split("=", 1)[1]
+
+ # Starting with GNU Make 4.4, named pipes are used for reader
+ # and writer.
+ # Example argument: --jobserver-auth=fifo:/tmp/GMfifo8134
+ _, _, path = fds.partition("fifo:")
+
+ if path:
+ self.reader = os.open(path, os.O_RDONLY | os.O_NONBLOCK)
+ self.writer = os.open(path, os.O_WRONLY)
+ else:
+ self.reader, self.writer = [int(x) for x in fds.split(",", 1)]
+ # Open a private copy of reader to avoid setting nonblocking
+ # on an unexpecting process with the same reader fd.
+ self.reader = os.open("/proc/self/fd/%d" % (self.reader),
+ os.O_RDONLY | os.O_NONBLOCK)
+
+ # Read out as many jobserver slots as possible
+ while True:
+ try:
+ slot = os.read(self.reader, 8)
+ self.jobs += slot
+ except (OSError, IOError) as e:
+ if e.errno == errno.EWOULDBLOCK:
+ # Stop at the end of the jobserver queue.
+ break
+ # If something went wrong, give back the jobs.
+ if self.jobs:
+ os.write(self.writer, self.jobs)
+ raise e
+
+ # Add a bump for our caller's reserveration, since we're just going
+ # to sit here blocked on our child.
+ self.claim = len(self.jobs) + 1
+
+ except (KeyError, IndexError, ValueError, OSError, IOError):
+ # Any missing environment strings or bad fds should result in just
+ # not being parallel.
+ self.claim = None
+
+ self.is_open = True
+
+ def close(self):
+ """Return all reserved slots to Jobserver"""
+
+ if not self.is_open:
+ return
+
+ # Return all the reserved slots.
+ if len(self.jobs):
+ os.write(self.writer, self.jobs)
+
+ self.is_open = False
+
+ def __enter__(self):
+ self.open()
+ return self
+
+ def __exit__(self, exc_type, exc_value, exc_traceback):
+ self.close()
+
+ def run(self, cmd):
+ """
+ Run a command setting PARALLELISM env variable to the number of
+ available job slots (claim) + 1, e.g. it will reserve claim slots
+ to do the actual build work, plus one to monitor its childs.
+ """
+ self.open() # Ensure that self.claim is set
+
+ # We can only claim parallelism if there was a jobserver (i.e. a
+ # top-level "-jN" argument) and there were no other failures. Otherwise
+ # leave out the environment variable and let the child figure out what
+ # is best.
+ if self.claim:
+ os.environ["PARALLELISM"] = str(self.claim)
+
+ return subprocess.call(cmd)
+
+
+def main():
+ """Main program"""
+ with JobserverExec() as jobserver:
+ jobserver.run(sys.argv[1:])
+
+
+if __name__ == "__main__":
+ main()
--
2.51.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v2 02/13] scripts/jobserver-exec: move its class to the lib directory
2025-08-25 16:30 [PATCH v2 00/13] Split sphinx call logic from docs Makefile Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 01/13] scripts/jobserver-exec: move the code to a class Mauro Carvalho Chehab
@ 2025-08-25 16:30 ` Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 03/13] scripts/jobserver-exec: add a help message Mauro Carvalho Chehab
` (10 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Mauro Carvalho Chehab @ 2025-08-25 16:30 UTC (permalink / raw)
To: Linux Doc Mailing List
Cc: Mauro Carvalho Chehab, Jonathan Corbet, Mauro Carvalho Chehab,
linux-kernel
To make it easier to be re-used, move the JobserverExec class
to the library directory.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
scripts/jobserver-exec | 152 +++------------------------------------
scripts/lib/jobserver.py | 149 ++++++++++++++++++++++++++++++++++++++
2 files changed, 160 insertions(+), 141 deletions(-)
create mode 100755 scripts/lib/jobserver.py
diff --git a/scripts/jobserver-exec b/scripts/jobserver-exec
index b386b1a845de..40a0f0058733 100755
--- a/scripts/jobserver-exec
+++ b/scripts/jobserver-exec
@@ -1,155 +1,25 @@
#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0+
-#
-# pylint: disable=C0103,C0209
-#
-# This determines how many parallel tasks "make" is expecting, as it is
-# not exposed via an special variables, reserves them all, runs a subprocess
-# with PARALLELISM environment variable set, and releases the jobs back again.
-#
-# https://www.gnu.org/software/make/manual/html_node/POSIX-Jobserver.html#POSIX-Jobserver
-"""
-Interacts with the POSIX jobserver during the Kernel build time.
-
-A "normal" jobserver task, like the one initiated by a make subrocess would do:
-
- - open read/write file descriptors to communicate with the job server;
- - ask for one slot by calling:
- claim = os.read(reader, 1)
- - when the job finshes, call:
- os.write(writer, b"+") # os.write(writer, claim)
-
-Here, the goal is different: This script aims to get the remaining number
-of slots available, using all of them to run a command which handle tasks in
-parallel. To to that, it has a loop that ends only after there are no
-slots left. It then increments the number by one, in order to allow a
-call equivalent to make -j$((claim+1)), e.g. having a parent make creating
-$claim child to do the actual work.
-
-The end goal here is to keep the total number of build tasks under the
-limit established by the initial make -j$n_proc call.
-"""
-
-import errno
import os
-import subprocess
import sys
+LIB_DIR = "lib"
+SRC_DIR = os.path.dirname(os.path.realpath(__file__))
-class JobserverExec:
- """
- Claim all slots from make using POSIX Jobserver.
+sys.path.insert(0, os.path.join(SRC_DIR, LIB_DIR))
- The main methods here are:
- - open(): reserves all slots;
- - close(): method returns all used slots back to make;
- - run(): executes a command setting PARALLELISM=<available slots jobs + 1>
- """
+from jobserver import JobserverExec # pylint: disable=C0415
- def __init__(self):
- """Initialize internal vars"""
- self.claim = 0
- self.jobs = b""
- self.reader = None
- self.writer = None
- self.is_open = False
- def open(self):
- """Reserve all available slots to be claimed later on"""
-
- if self.is_open:
- return
-
- try:
- # Fetch the make environment options.
- flags = os.environ["MAKEFLAGS"]
- # Look for "--jobserver=R,W"
- # Note that GNU Make has used --jobserver-fds and --jobserver-auth
- # so this handles all of them.
- opts = [x for x in flags.split(" ") if x.startswith("--jobserver")]
-
- # Parse out R,W file descriptor numbers and set them nonblocking.
- # If the MAKEFLAGS variable contains multiple instances of the
- # --jobserver-auth= option, the last one is relevant.
- fds = opts[-1].split("=", 1)[1]
-
- # Starting with GNU Make 4.4, named pipes are used for reader
- # and writer.
- # Example argument: --jobserver-auth=fifo:/tmp/GMfifo8134
- _, _, path = fds.partition("fifo:")
-
- if path:
- self.reader = os.open(path, os.O_RDONLY | os.O_NONBLOCK)
- self.writer = os.open(path, os.O_WRONLY)
- else:
- self.reader, self.writer = [int(x) for x in fds.split(",", 1)]
- # Open a private copy of reader to avoid setting nonblocking
- # on an unexpecting process with the same reader fd.
- self.reader = os.open("/proc/self/fd/%d" % (self.reader),
- os.O_RDONLY | os.O_NONBLOCK)
-
- # Read out as many jobserver slots as possible
- while True:
- try:
- slot = os.read(self.reader, 8)
- self.jobs += slot
- except (OSError, IOError) as e:
- if e.errno == errno.EWOULDBLOCK:
- # Stop at the end of the jobserver queue.
- break
- # If something went wrong, give back the jobs.
- if self.jobs:
- os.write(self.writer, self.jobs)
- raise e
-
- # Add a bump for our caller's reserveration, since we're just going
- # to sit here blocked on our child.
- self.claim = len(self.jobs) + 1
-
- except (KeyError, IndexError, ValueError, OSError, IOError):
- # Any missing environment strings or bad fds should result in just
- # not being parallel.
- self.claim = None
-
- self.is_open = True
-
- def close(self):
- """Return all reserved slots to Jobserver"""
-
- if not self.is_open:
- return
-
- # Return all the reserved slots.
- if len(self.jobs):
- os.write(self.writer, self.jobs)
-
- self.is_open = False
-
- def __enter__(self):
- self.open()
- return self
-
- def __exit__(self, exc_type, exc_value, exc_traceback):
- self.close()
-
- def run(self, cmd):
- """
- Run a command setting PARALLELISM env variable to the number of
- available job slots (claim) + 1, e.g. it will reserve claim slots
- to do the actual build work, plus one to monitor its childs.
- """
- self.open() # Ensure that self.claim is set
-
- # We can only claim parallelism if there was a jobserver (i.e. a
- # top-level "-jN" argument) and there were no other failures. Otherwise
- # leave out the environment variable and let the child figure out what
- # is best.
- if self.claim:
- os.environ["PARALLELISM"] = str(self.claim)
-
- return subprocess.call(cmd)
+"""
+Determines how many parallel tasks "make" is expecting, as it is
+not exposed via an special variables, reserves them all, runs a subprocess
+with PARALLELISM environment variable set, and releases the jobs back again.
+See:
+ https://www.gnu.org/software/make/manual/html_node/POSIX-Jobserver.html#POSIX-Jobserver
+"""
def main():
"""Main program"""
diff --git a/scripts/lib/jobserver.py b/scripts/lib/jobserver.py
new file mode 100755
index 000000000000..98d8b0ff0c89
--- /dev/null
+++ b/scripts/lib/jobserver.py
@@ -0,0 +1,149 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0+
+#
+# pylint: disable=C0103,C0209
+#
+#
+
+"""
+Interacts with the POSIX jobserver during the Kernel build time.
+
+A "normal" jobserver task, like the one initiated by a make subrocess would do:
+
+ - open read/write file descriptors to communicate with the job server;
+ - ask for one slot by calling:
+ claim = os.read(reader, 1)
+ - when the job finshes, call:
+ os.write(writer, b"+") # os.write(writer, claim)
+
+Here, the goal is different: This script aims to get the remaining number
+of slots available, using all of them to run a command which handle tasks in
+parallel. To to that, it has a loop that ends only after there are no
+slots left. It then increments the number by one, in order to allow a
+call equivalent to make -j$((claim+1)), e.g. having a parent make creating
+$claim child to do the actual work.
+
+The end goal here is to keep the total number of build tasks under the
+limit established by the initial make -j$n_proc call.
+
+See:
+ https://www.gnu.org/software/make/manual/html_node/POSIX-Jobserver.html#POSIX-Jobserver
+"""
+
+import errno
+import os
+import subprocess
+import sys
+
+class JobserverExec:
+ """
+ Claim all slots from make using POSIX Jobserver.
+
+ The main methods here are:
+ - open(): reserves all slots;
+ - close(): method returns all used slots back to make;
+ - run(): executes a command setting PARALLELISM=<available slots jobs + 1>
+ """
+
+ def __init__(self):
+ """Initialize internal vars"""
+ self.claim = 0
+ self.jobs = b""
+ self.reader = None
+ self.writer = None
+ self.is_open = False
+
+ def open(self):
+ """Reserve all available slots to be claimed later on"""
+
+ if self.is_open:
+ return
+
+ try:
+ # Fetch the make environment options.
+ flags = os.environ["MAKEFLAGS"]
+ # Look for "--jobserver=R,W"
+ # Note that GNU Make has used --jobserver-fds and --jobserver-auth
+ # so this handles all of them.
+ opts = [x for x in flags.split(" ") if x.startswith("--jobserver")]
+
+ # Parse out R,W file descriptor numbers and set them nonblocking.
+ # If the MAKEFLAGS variable contains multiple instances of the
+ # --jobserver-auth= option, the last one is relevant.
+ fds = opts[-1].split("=", 1)[1]
+
+ # Starting with GNU Make 4.4, named pipes are used for reader
+ # and writer.
+ # Example argument: --jobserver-auth=fifo:/tmp/GMfifo8134
+ _, _, path = fds.partition("fifo:")
+
+ if path:
+ self.reader = os.open(path, os.O_RDONLY | os.O_NONBLOCK)
+ self.writer = os.open(path, os.O_WRONLY)
+ else:
+ self.reader, self.writer = [int(x) for x in fds.split(",", 1)]
+ # Open a private copy of reader to avoid setting nonblocking
+ # on an unexpecting process with the same reader fd.
+ self.reader = os.open("/proc/self/fd/%d" % (self.reader),
+ os.O_RDONLY | os.O_NONBLOCK)
+
+ # Read out as many jobserver slots as possible
+ while True:
+ try:
+ slot = os.read(self.reader, 8)
+ self.jobs += slot
+ except (OSError, IOError) as e:
+ if e.errno == errno.EWOULDBLOCK:
+ # Stop at the end of the jobserver queue.
+ break
+ # If something went wrong, give back the jobs.
+ if self.jobs:
+ os.write(self.writer, self.jobs)
+ raise e
+
+ # Add a bump for our caller's reserveration, since we're just going
+ # to sit here blocked on our child.
+ self.claim = len(self.jobs) + 1
+
+ except (KeyError, IndexError, ValueError, OSError, IOError):
+ # Any missing environment strings or bad fds should result in just
+ # not being parallel.
+ self.claim = None
+
+ self.is_open = True
+
+ def close(self):
+ """Return all reserved slots to Jobserver"""
+
+ if not self.is_open:
+ return
+
+ # Return all the reserved slots.
+ if len(self.jobs):
+ os.write(self.writer, self.jobs)
+
+ self.is_open = False
+
+ def __enter__(self):
+ self.open()
+ return self
+
+ def __exit__(self, exc_type, exc_value, exc_traceback):
+ self.close()
+
+ def run(self, cmd, *args, **pwargs):
+ """
+ Run a command setting PARALLELISM env variable to the number of
+ available job slots (claim) + 1, e.g. it will reserve claim slots
+ to do the actual build work, plus one to monitor its childs.
+ """
+ self.open() # Ensure that self.claim is set
+
+ # We can only claim parallelism if there was a jobserver (i.e. a
+ # top-level "-jN" argument) and there were no other failures. Otherwise
+ # leave out the environment variable and let the child figure out what
+ # is best.
+ if self.claim:
+ os.environ["PARALLELISM"] = str(self.claim)
+
+ return subprocess.call(cmd, *args, **pwargs)
--
2.51.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v2 03/13] scripts/jobserver-exec: add a help message
2025-08-25 16:30 [PATCH v2 00/13] Split sphinx call logic from docs Makefile Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 01/13] scripts/jobserver-exec: move the code to a class Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 02/13] scripts/jobserver-exec: move its class to the lib directory Mauro Carvalho Chehab
@ 2025-08-25 16:30 ` Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 04/13] scripts: sphinx-pre-install: move it to tools/docs Mauro Carvalho Chehab
` (9 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Mauro Carvalho Chehab @ 2025-08-25 16:30 UTC (permalink / raw)
To: Linux Doc Mailing List
Cc: Mauro Carvalho Chehab, Jonathan Corbet, Mauro Carvalho Chehab,
linux-kernel
Currently, calling it without an argument shows an ugly error
message. Instead, print a message using pythondoc as description.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
scripts/jobserver-exec | 22 +++++++++++++---------
1 file changed, 13 insertions(+), 9 deletions(-)
diff --git a/scripts/jobserver-exec b/scripts/jobserver-exec
index 40a0f0058733..ae23afd344ec 100755
--- a/scripts/jobserver-exec
+++ b/scripts/jobserver-exec
@@ -1,6 +1,15 @@
#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0+
+"""
+Determines how many parallel tasks "make" is expecting, as it is
+not exposed via any special variables, reserves them all, runs a subprocess
+with PARALLELISM environment variable set, and releases the jobs back again.
+
+See:
+ https://www.gnu.org/software/make/manual/html_node/POSIX-Jobserver.html#POSIX-Jobserver
+"""
+
import os
import sys
@@ -12,17 +21,12 @@ sys.path.insert(0, os.path.join(SRC_DIR, LIB_DIR))
from jobserver import JobserverExec # pylint: disable=C0415
-"""
-Determines how many parallel tasks "make" is expecting, as it is
-not exposed via an special variables, reserves them all, runs a subprocess
-with PARALLELISM environment variable set, and releases the jobs back again.
-
-See:
- https://www.gnu.org/software/make/manual/html_node/POSIX-Jobserver.html#POSIX-Jobserver
-"""
-
def main():
"""Main program"""
+ if len(sys.argv) < 2:
+ name = os.path.basename(__file__)
+ sys.exit("usage: " + name +" command [args ...]\n" + __doc__)
+
with JobserverExec() as jobserver:
jobserver.run(sys.argv[1:])
--
2.51.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v2 04/13] scripts: sphinx-pre-install: move it to tools/docs
2025-08-25 16:30 [PATCH v2 00/13] Split sphinx call logic from docs Makefile Mauro Carvalho Chehab
` (2 preceding siblings ...)
2025-08-25 16:30 ` [PATCH v2 03/13] scripts/jobserver-exec: add a help message Mauro Carvalho Chehab
@ 2025-08-25 16:30 ` Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 05/13] tools/docs: sphinx-pre-install: move Python version handling to lib Mauro Carvalho Chehab
` (8 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Mauro Carvalho Chehab @ 2025-08-25 16:30 UTC (permalink / raw)
To: Linux Doc Mailing List
Cc: Mauro Carvalho Chehab, Jonathan Corbet, Mauro Carvalho Chehab,
linux-kernel
As we're reorganizing the place where doc scripts are located,
move this one to tools/docs.
No functional changes.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
Documentation/Makefile | 14 +++++++-------
{scripts => tools/docs}/sphinx-pre-install | 0
2 files changed, 7 insertions(+), 7 deletions(-)
rename {scripts => tools/docs}/sphinx-pre-install (100%)
diff --git a/Documentation/Makefile b/Documentation/Makefile
index 5c20c68be89a..deb2029228ed 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -46,7 +46,7 @@ ifeq ($(HAVE_SPHINX),0)
.DEFAULT:
$(warning The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed and in PATH, or set the SPHINXBUILD make variable to point to the full path of the '$(SPHINXBUILD)' executable.)
@echo
- @$(srctree)/scripts/sphinx-pre-install
+ @$(srctree)/tools/docs/sphinx-pre-install
@echo " SKIP Sphinx $@ target."
else # HAVE_SPHINX
@@ -105,7 +105,7 @@ quiet_cmd_sphinx = SPHINX $@ --> file://$(abspath $(BUILDDIR)/$3/$4)
fi
htmldocs:
- @$(srctree)/scripts/sphinx-pre-install --version-check
+ @$(srctree)/tools/docs/sphinx-pre-install --version-check
@+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,html,$(var),,$(var)))
# If Rust support is available and .config exists, add rustdoc generated contents.
@@ -119,7 +119,7 @@ endif
endif
texinfodocs:
- @$(srctree)/scripts/sphinx-pre-install --version-check
+ @$(srctree)/tools/docs/sphinx-pre-install --version-check
@+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,texinfo,$(var),texinfo,$(var)))
# Note: the 'info' Make target is generated by sphinx itself when
@@ -131,7 +131,7 @@ linkcheckdocs:
@$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,linkcheck,$(var),,$(var)))
latexdocs:
- @$(srctree)/scripts/sphinx-pre-install --version-check
+ @$(srctree)/tools/docs/sphinx-pre-install --version-check
@+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,latex,$(var),latex,$(var)))
ifeq ($(HAVE_PDFLATEX),0)
@@ -144,7 +144,7 @@ else # HAVE_PDFLATEX
pdfdocs: DENY_VF = XDG_CONFIG_HOME=$(FONTS_CONF_DENY_VF)
pdfdocs: latexdocs
- @$(srctree)/scripts/sphinx-pre-install --version-check
+ @$(srctree)/tools/docs/sphinx-pre-install --version-check
$(foreach var,$(SPHINXDIRS), \
$(MAKE) PDFLATEX="$(PDFLATEX)" LATEXOPTS="$(LATEXOPTS)" $(DENY_VF) -C $(BUILDDIR)/$(var)/latex || sh $(srctree)/scripts/check-variable-fonts.sh || exit; \
mkdir -p $(BUILDDIR)/$(var)/pdf; \
@@ -154,11 +154,11 @@ pdfdocs: latexdocs
endif # HAVE_PDFLATEX
epubdocs:
- @$(srctree)/scripts/sphinx-pre-install --version-check
+ @$(srctree)/tools/docs/sphinx-pre-install --version-check
@+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,epub,$(var),epub,$(var)))
xmldocs:
- @$(srctree)/scripts/sphinx-pre-install --version-check
+ @$(srctree)/tools/docs/sphinx-pre-install --version-check
@+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,xml,$(var),xml,$(var)))
endif # HAVE_SPHINX
diff --git a/scripts/sphinx-pre-install b/tools/docs/sphinx-pre-install
similarity index 100%
rename from scripts/sphinx-pre-install
rename to tools/docs/sphinx-pre-install
--
2.51.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v2 05/13] tools/docs: sphinx-pre-install: move Python version handling to lib
2025-08-25 16:30 [PATCH v2 00/13] Split sphinx call logic from docs Makefile Mauro Carvalho Chehab
` (3 preceding siblings ...)
2025-08-25 16:30 ` [PATCH v2 04/13] scripts: sphinx-pre-install: move it to tools/docs Mauro Carvalho Chehab
@ 2025-08-25 16:30 ` Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 06/13] tools/docs: sphinx-build-wrapper: add a wrapper for sphinx-build Mauro Carvalho Chehab
` (7 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Mauro Carvalho Chehab @ 2025-08-25 16:30 UTC (permalink / raw)
To: Linux Doc Mailing List
Cc: Mauro Carvalho Chehab, Jonathan Corbet, Mauro Carvalho Chehab,
linux-kernel
The sphinx-pre-install code has some logic to deal with Python
version, which ensures that a minimal version will be enforced
for documentation build logic.
Move it to a separate library to allow re-using its code.
No functional changes.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
tools/docs/lib/python_version.py | 133 +++++++++++++++++++++++++++++++
tools/docs/sphinx-pre-install | 120 +++-------------------------
2 files changed, 146 insertions(+), 107 deletions(-)
create mode 100644 tools/docs/lib/python_version.py
diff --git a/tools/docs/lib/python_version.py b/tools/docs/lib/python_version.py
new file mode 100644
index 000000000000..0519d524e547
--- /dev/null
+++ b/tools/docs/lib/python_version.py
@@ -0,0 +1,133 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (c) 2017-2025 Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
+
+"""
+Handle Python version check logic.
+
+Not all Python versions are supported by scripts. Yet, on some cases,
+like during documentation build, a newer version of python could be
+available.
+
+This class allows checking if the minimal requirements are followed.
+
+Better than that, PythonVersion.check_python() not only checks the minimal
+requirements, but it automatically switches to a the newest available
+Python version if present.
+
+"""
+
+import os
+import re
+import subprocess
+import sys
+
+from glob import glob
+
+class PythonVersion:
+ """
+ Ancillary methods that checks for missing dependencies for different
+ types of types, like binaries, python modules, rpm deps, etc.
+ """
+
+ def __init__(self, version):
+ """Ïnitialize self.version tuple from a version string"""
+ self.version = self.parse_version(version)
+
+ @staticmethod
+ def parse_version(version):
+ """Convert a major.minor.patch version into a tuple"""
+ return tuple(int(x) for x in version.split("."))
+
+ @staticmethod
+ def ver_str(version):
+ """Returns a version tuple as major.minor.patch"""
+ return ".".join([str(x) for x in version])
+
+ def __str__(self):
+ """Returns a version tuple as major.minor.patch from self.version"""
+ return self.ver_str(self.version)
+
+ @staticmethod
+ def get_python_version(cmd):
+ """
+ Get python version from a Python binary. As we need to detect if
+ are out there newer python binaries, we can't rely on sys.release here.
+ """
+
+ kwargs = {}
+ if sys.version_info < (3, 7):
+ kwargs['universal_newlines'] = True
+ else:
+ kwargs['text'] = True
+
+ result = subprocess.run([cmd, "--version"],
+ stdout = subprocess.PIPE,
+ stderr = subprocess.PIPE,
+ **kwargs, check=False)
+
+ version = result.stdout.strip()
+
+ match = re.search(r"(\d+\.\d+\.\d+)", version)
+ if match:
+ return PythonVersion.parse_version(match.group(1))
+
+ print(f"Can't parse version {version}")
+ return (0, 0, 0)
+
+ @staticmethod
+ def find_python(min_version):
+ """
+ Detect if are out there any python 3.xy version newer than the
+ current one.
+
+ Note: this routine is limited to up to 2 digits for python3. We
+ may need to update it one day, hopefully on a distant future.
+ """
+ patterns = [
+ "python3.[0-9]",
+ "python3.[0-9][0-9]",
+ ]
+
+ # Seek for a python binary newer than min_version
+ for path in os.getenv("PATH", "").split(":"):
+ for pattern in patterns:
+ for cmd in glob(os.path.join(path, pattern)):
+ if os.path.isfile(cmd) and os.access(cmd, os.X_OK):
+ version = PythonVersion.get_python_version(cmd)
+ if version >= min_version:
+ return cmd
+
+ return None
+
+ @staticmethod
+ def check_python(min_version):
+ """
+ Check if the current python binary satisfies our minimal requirement
+ for Sphinx build. If not, re-run with a newer version if found.
+ """
+ cur_ver = sys.version_info[:3]
+ if cur_ver >= min_version:
+ ver = PythonVersion.ver_str(cur_ver)
+ print(f"Python version: {ver}")
+
+ return
+
+ python_ver = PythonVersion.ver_str(cur_ver)
+
+ new_python_cmd = PythonVersion.find_python(min_version)
+ if not new_python_cmd:
+ print(f"ERROR: Python version {python_ver} is not spported anymore\n")
+ print(" Can't find a new version. This script may fail")
+ return
+
+ # Restart script using the newer version
+ script_path = os.path.abspath(sys.argv[0])
+ args = [new_python_cmd, script_path] + sys.argv[1:]
+
+ print(f"Python {python_ver} not supported. Changing to {new_python_cmd}")
+
+ try:
+ os.execv(new_python_cmd, args)
+ except OSError as e:
+ sys.exit(f"Failed to restart with {new_python_cmd}: {e}")
diff --git a/tools/docs/sphinx-pre-install b/tools/docs/sphinx-pre-install
index 954ed3dc0645..d6d673b7945c 100755
--- a/tools/docs/sphinx-pre-install
+++ b/tools/docs/sphinx-pre-install
@@ -32,20 +32,10 @@ import subprocess
import sys
from glob import glob
+from lib.python_version import PythonVersion
-def parse_version(version):
- """Convert a major.minor.patch version into a tuple"""
- return tuple(int(x) for x in version.split("."))
-
-
-def ver_str(version):
- """Returns a version tuple as major.minor.patch"""
-
- return ".".join([str(x) for x in version])
-
-
-RECOMMENDED_VERSION = parse_version("3.4.3")
-MIN_PYTHON_VERSION = parse_version("3.7")
+RECOMMENDED_VERSION = PythonVersion("3.4.3").version
+MIN_PYTHON_VERSION = PythonVersion("3.7").version
class DepManager:
@@ -235,95 +225,11 @@ class AncillaryMethods:
return None
- @staticmethod
- def get_python_version(cmd):
- """
- Get python version from a Python binary. As we need to detect if
- are out there newer python binaries, we can't rely on sys.release here.
- """
-
- result = SphinxDependencyChecker.run([cmd, "--version"],
- capture_output=True, text=True)
- version = result.stdout.strip()
-
- match = re.search(r"(\d+\.\d+\.\d+)", version)
- if match:
- return parse_version(match.group(1))
-
- print(f"Can't parse version {version}")
- return (0, 0, 0)
-
- @staticmethod
- def find_python():
- """
- Detect if are out there any python 3.xy version newer than the
- current one.
-
- Note: this routine is limited to up to 2 digits for python3. We
- may need to update it one day, hopefully on a distant future.
- """
- patterns = [
- "python3.[0-9]",
- "python3.[0-9][0-9]",
- ]
-
- # Seek for a python binary newer than MIN_PYTHON_VERSION
- for path in os.getenv("PATH", "").split(":"):
- for pattern in patterns:
- for cmd in glob(os.path.join(path, pattern)):
- if os.path.isfile(cmd) and os.access(cmd, os.X_OK):
- version = SphinxDependencyChecker.get_python_version(cmd)
- if version >= MIN_PYTHON_VERSION:
- return cmd
-
- @staticmethod
- def check_python():
- """
- Check if the current python binary satisfies our minimal requirement
- for Sphinx build. If not, re-run with a newer version if found.
- """
- cur_ver = sys.version_info[:3]
- if cur_ver >= MIN_PYTHON_VERSION:
- ver = ver_str(cur_ver)
- print(f"Python version: {ver}")
-
- # This could be useful for debugging purposes
- if SphinxDependencyChecker.which("docutils"):
- result = SphinxDependencyChecker.run(["docutils", "--version"],
- capture_output=True, text=True)
- ver = result.stdout.strip()
- match = re.search(r"(\d+\.\d+\.\d+)", ver)
- if match:
- ver = match.group(1)
-
- print(f"Docutils version: {ver}")
-
- return
-
- python_ver = ver_str(cur_ver)
-
- new_python_cmd = SphinxDependencyChecker.find_python()
- if not new_python_cmd:
- print(f"ERROR: Python version {python_ver} is not spported anymore\n")
- print(" Can't find a new version. This script may fail")
- return
-
- # Restart script using the newer version
- script_path = os.path.abspath(sys.argv[0])
- args = [new_python_cmd, script_path] + sys.argv[1:]
-
- print(f"Python {python_ver} not supported. Changing to {new_python_cmd}")
-
- try:
- os.execv(new_python_cmd, args)
- except OSError as e:
- sys.exit(f"Failed to restart with {new_python_cmd}: {e}")
-
@staticmethod
def run(*args, **kwargs):
"""
Excecute a command, hiding its output by default.
- Preserve comatibility with older Python versions.
+ Preserve compatibility with older Python versions.
"""
capture_output = kwargs.pop('capture_output', False)
@@ -527,11 +433,11 @@ class MissingCheckers(AncillaryMethods):
for line in result.stdout.split("\n"):
match = re.match(r"^sphinx-build\s+([\d\.]+)(?:\+(?:/[\da-f]+)|b\d+)?\s*$", line)
if match:
- return parse_version(match.group(1))
+ return PythonVersion.parse_version(match.group(1))
match = re.match(r"^Sphinx.*\s+([\d\.]+)\s*$", line)
if match:
- return parse_version(match.group(1))
+ return PythonVersion.parse_version(match.group(1))
def check_sphinx(self, conf):
"""
@@ -542,7 +448,7 @@ class MissingCheckers(AncillaryMethods):
for line in f:
match = re.match(r"^\s*needs_sphinx\s*=\s*[\'\"]([\d\.]+)[\'\"]", line)
if match:
- self.min_version = parse_version(match.group(1))
+ self.min_version = PythonVersion.parse_version(match.group(1))
break
except IOError:
sys.exit(f"Can't open {conf}")
@@ -562,8 +468,8 @@ class MissingCheckers(AncillaryMethods):
sys.exit(f"{sphinx} didn't return its version")
if self.cur_version < self.min_version:
- curver = ver_str(self.cur_version)
- minver = ver_str(self.min_version)
+ curver = PythonVersion.ver_str(self.cur_version)
+ minver = PythonVersion.ver_str(self.min_version)
print(f"ERROR: Sphinx version is {curver}. It should be >= {minver}")
self.need_sphinx = 1
@@ -1304,7 +1210,7 @@ class SphinxDependencyChecker(MissingCheckers):
else:
if self.need_sphinx and ver >= self.min_version:
return (f, ver)
- elif parse_version(ver) > self.cur_version:
+ elif PythonVersion.parse_version(ver) > self.cur_version:
return (f, ver)
return ("", ver)
@@ -1411,7 +1317,7 @@ class SphinxDependencyChecker(MissingCheckers):
return
if self.latest_avail_ver:
- latest_avail_ver = ver_str(self.latest_avail_ver)
+ latest_avail_ver = PythonVersion.ver_str(self.latest_avail_ver)
if not self.need_sphinx:
# sphinx-build is present and its version is >= $min_version
@@ -1507,7 +1413,7 @@ class SphinxDependencyChecker(MissingCheckers):
else:
print("Unknown OS")
if self.cur_version != (0, 0, 0):
- ver = ver_str(self.cur_version)
+ ver = PythonVersion.ver_str(self.cur_version)
print(f"Sphinx version: {ver}\n")
# Check the type of virtual env, depending on Python version
@@ -1613,7 +1519,7 @@ def main():
checker = SphinxDependencyChecker(args)
- checker.check_python()
+ PythonVersion.check_python(MIN_PYTHON_VERSION)
checker.check_needs()
# Call main if not used as module
--
2.51.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v2 06/13] tools/docs: sphinx-build-wrapper: add a wrapper for sphinx-build
2025-08-25 16:30 [PATCH v2 00/13] Split sphinx call logic from docs Makefile Mauro Carvalho Chehab
` (4 preceding siblings ...)
2025-08-25 16:30 ` [PATCH v2 05/13] tools/docs: sphinx-pre-install: move Python version handling to lib Mauro Carvalho Chehab
@ 2025-08-25 16:30 ` Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 07/13] tools/docs: sphinx-build-wrapper: add comments and blank lines Mauro Carvalho Chehab
` (6 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Mauro Carvalho Chehab @ 2025-08-25 16:30 UTC (permalink / raw)
To: Linux Doc Mailing List
Cc: Mauro Carvalho Chehab, Björn Roy Baron, Jonathan Corbet,
Mauro Carvalho Chehab, Alex Gaynor, Alice Ryhl, Andreas Hindborg,
Benno Lossin, Boqun Feng, Danilo Krummrich, Gary Guo,
Miguel Ojeda, Trevor Gross, linux-kernel, rust-for-linux
There are too much magic inside docs Makefile to properly run
sphinx-build. Create an ancillary script that contains all
kernel-related sphinx-build call logic currently at Makefile.
Such script is designed to work both as an standalone command
and as part of a Makefile. As such, it properly handles POSIX
jobserver used by GNU make.
On a side note, there was a line number increase due to the
conversion:
$ git show|diffstat -p1
Documentation/Makefile | 129 +++-------------
tools/docs/sphinx-build-wrapper | 288 +++++++++++++++++++++++++++++++++++++
2 files changed, 316 insertions(+), 101 deletions(-)
This is because some things are more verbosed on Python and because
it requires reading env vars from Makefile. Besides it, this script
has some extra features that don't exist at the Makefile:
- It can be called directly from command line;
- It properly return PDF build errors.
When running the script alone, it will only take handle sphinx-build
targets. On other words, it won't runn make rustdoc after building
htmlfiles, nor it will run the extra check scripts.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
Documentation/Makefile | 129 ++++----------
tools/docs/sphinx-build-wrapper | 288 ++++++++++++++++++++++++++++++++
2 files changed, 316 insertions(+), 101 deletions(-)
create mode 100755 tools/docs/sphinx-build-wrapper
diff --git a/Documentation/Makefile b/Documentation/Makefile
index deb2029228ed..2b0ed8cd5ea8 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -23,21 +23,22 @@ SPHINXOPTS =
SPHINXDIRS = .
DOCS_THEME =
DOCS_CSS =
-_SPHINXDIRS = $(sort $(patsubst $(srctree)/Documentation/%/index.rst,%,$(wildcard $(srctree)/Documentation/*/index.rst)))
SPHINX_CONF = conf.py
PAPER =
BUILDDIR = $(obj)/output
PDFLATEX = xelatex
LATEXOPTS = -interaction=batchmode -no-shell-escape
+PYTHONPYCACHEPREFIX ?= $(abspath $(BUILDDIR)/__pycache__)
+
+# Wrapper for sphinx-build
+
+BUILD_WRAPPER = $(srctree)/tools/docs/sphinx-build-wrapper
+
# For denylisting "variable font" files
# Can be overridden by setting as an env variable
FONTS_CONF_DENY_VF ?= $(HOME)/deny-vf
-ifeq ($(findstring 1, $(KBUILD_VERBOSE)),)
-SPHINXOPTS += "-q"
-endif
-
# User-friendly check for sphinx-build
HAVE_SPHINX := $(shell if which $(SPHINXBUILD) >/dev/null 2>&1; then echo 1; else echo 0; fi)
@@ -51,63 +52,29 @@ ifeq ($(HAVE_SPHINX),0)
else # HAVE_SPHINX
-# User-friendly check for pdflatex and latexmk
-HAVE_PDFLATEX := $(shell if which $(PDFLATEX) >/dev/null 2>&1; then echo 1; else echo 0; fi)
-HAVE_LATEXMK := $(shell if which latexmk >/dev/null 2>&1; then echo 1; else echo 0; fi)
+# Common documentation targets
+infodocs texinfodocs latexdocs epubdocs xmldocs pdfdocs linkcheckdocs:
+ $(Q)@$(srctree)/tools/docs/sphinx-pre-install --version-check
+ +$(Q)$(PYTHON3) $(BUILD_WRAPPER) $@ \
+ --sphinxdirs="$(SPHINXDIRS)" --conf=$(SPHINX_CONF) \
+ --theme=$(DOCS_THEME) --css=$(DOCS_CSS) --paper=$(PAPER)
-ifeq ($(HAVE_LATEXMK),1)
- PDFLATEX := latexmk -$(PDFLATEX)
-endif #HAVE_LATEXMK
-
-# Internal variables.
-PAPEROPT_a4 = -D latex_elements.papersize=a4paper
-PAPEROPT_letter = -D latex_elements.papersize=letterpaper
-ALLSPHINXOPTS = -D kerneldoc_srctree=$(srctree) -D kerneldoc_bin=$(KERNELDOC)
-ALLSPHINXOPTS += $(PAPEROPT_$(PAPER)) $(SPHINXOPTS)
-ifneq ($(wildcard $(srctree)/.config),)
-ifeq ($(CONFIG_RUST),y)
- # Let Sphinx know we will include rustdoc
- ALLSPHINXOPTS += -t rustdoc
-endif
+# Special handling for pdfdocs
+ifeq ($(shell which $(PDFLATEX) >/dev/null 2>&1; echo $$?),0)
+pdfdocs: DENY_VF = XDG_CONFIG_HOME=$(FONTS_CONF_DENY_VF)
+else
+pdfdocs:
+ $(warning The '$(PDFLATEX)' command was not found. Make sure you have it installed and in PATH to produce PDF output.)
+ @echo " SKIP Sphinx $@ target."
endif
-# the i18n builder cannot share the environment and doctrees with the others
-I18NSPHINXOPTS = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
-
-# commands; the 'cmd' from scripts/Kbuild.include is not *loopable*
-loop_cmd = $(echo-cmd) $(cmd_$(1)) || exit;
-
-# $2 sphinx builder e.g. "html"
-# $3 name of the build subfolder / e.g. "userspace-api/media", used as:
-# * dest folder relative to $(BUILDDIR) and
-# * cache folder relative to $(BUILDDIR)/.doctrees
-# $4 dest subfolder e.g. "man" for man pages at userspace-api/media/man
-# $5 reST source folder relative to $(src),
-# e.g. "userspace-api/media" for the linux-tv book-set at ./Documentation/userspace-api/media
-
-PYTHONPYCACHEPREFIX ?= $(abspath $(BUILDDIR)/__pycache__)
-
-quiet_cmd_sphinx = SPHINX $@ --> file://$(abspath $(BUILDDIR)/$3/$4)
- cmd_sphinx = \
- PYTHONPYCACHEPREFIX="$(PYTHONPYCACHEPREFIX)" \
- BUILDDIR=$(abspath $(BUILDDIR)) SPHINX_CONF=$(abspath $(src)/$5/$(SPHINX_CONF)) \
- $(PYTHON3) $(srctree)/scripts/jobserver-exec \
- $(CONFIG_SHELL) $(srctree)/Documentation/sphinx/parallel-wrapper.sh \
- $(SPHINXBUILD) \
- -b $2 \
- -c $(abspath $(src)) \
- -d $(abspath $(BUILDDIR)/.doctrees/$3) \
- -D version=$(KERNELVERSION) -D release=$(KERNELRELEASE) \
- $(ALLSPHINXOPTS) \
- $(abspath $(src)/$5) \
- $(abspath $(BUILDDIR)/$3/$4) && \
- if [ "x$(DOCS_CSS)" != "x" ]; then \
- cp $(if $(patsubst /%,,$(DOCS_CSS)),$(abspath $(srctree)/$(DOCS_CSS)),$(DOCS_CSS)) $(BUILDDIR)/$3/_static/; \
- fi
+# HTML main logic is identical to other targets. However, if rust is enabled,
+# an extra step at the end is required to generate rustdoc.
htmldocs:
- @$(srctree)/tools/docs/sphinx-pre-install --version-check
- @+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,html,$(var),,$(var)))
-
+ $(Q)@$(srctree)/tools/docs/sphinx-pre-install --version-check
+ +$(Q)$(PYTHON3) $(BUILD_WRAPPER) $@ \
+ --sphinxdirs="$(SPHINXDIRS)" --conf=$(SPHINX_CONF) \
+ --theme=$(DOCS_THEME) --css=$(DOCS_CSS) --paper=$(PAPER)
# If Rust support is available and .config exists, add rustdoc generated contents.
# If there are any, the errors from this make rustdoc will be displayed but
# won't stop the execution of htmldocs
@@ -118,49 +85,6 @@ ifeq ($(CONFIG_RUST),y)
endif
endif
-texinfodocs:
- @$(srctree)/tools/docs/sphinx-pre-install --version-check
- @+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,texinfo,$(var),texinfo,$(var)))
-
-# Note: the 'info' Make target is generated by sphinx itself when
-# running the texinfodocs target define above.
-infodocs: texinfodocs
- $(MAKE) -C $(BUILDDIR)/texinfo info
-
-linkcheckdocs:
- @$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,linkcheck,$(var),,$(var)))
-
-latexdocs:
- @$(srctree)/tools/docs/sphinx-pre-install --version-check
- @+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,latex,$(var),latex,$(var)))
-
-ifeq ($(HAVE_PDFLATEX),0)
-
-pdfdocs:
- $(warning The '$(PDFLATEX)' command was not found. Make sure you have it installed and in PATH to produce PDF output.)
- @echo " SKIP Sphinx $@ target."
-
-else # HAVE_PDFLATEX
-
-pdfdocs: DENY_VF = XDG_CONFIG_HOME=$(FONTS_CONF_DENY_VF)
-pdfdocs: latexdocs
- @$(srctree)/tools/docs/sphinx-pre-install --version-check
- $(foreach var,$(SPHINXDIRS), \
- $(MAKE) PDFLATEX="$(PDFLATEX)" LATEXOPTS="$(LATEXOPTS)" $(DENY_VF) -C $(BUILDDIR)/$(var)/latex || sh $(srctree)/scripts/check-variable-fonts.sh || exit; \
- mkdir -p $(BUILDDIR)/$(var)/pdf; \
- mv $(subst .tex,.pdf,$(wildcard $(BUILDDIR)/$(var)/latex/*.tex)) $(BUILDDIR)/$(var)/pdf/; \
- )
-
-endif # HAVE_PDFLATEX
-
-epubdocs:
- @$(srctree)/tools/docs/sphinx-pre-install --version-check
- @+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,epub,$(var),epub,$(var)))
-
-xmldocs:
- @$(srctree)/tools/docs/sphinx-pre-install --version-check
- @+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,xml,$(var),xml,$(var)))
-
endif # HAVE_SPHINX
# The following targets are independent of HAVE_SPHINX, and the rules should
@@ -172,6 +96,9 @@ refcheckdocs:
cleandocs:
$(Q)rm -rf $(BUILDDIR)
+# Used only on help
+_SPHINXDIRS = $(sort $(patsubst $(srctree)/Documentation/%/index.rst,%,$(wildcard $(srctree)/Documentation/*/index.rst)))
+
dochelp:
@echo ' Linux kernel internal documentation in different formats from ReST:'
@echo ' htmldocs - HTML'
diff --git a/tools/docs/sphinx-build-wrapper b/tools/docs/sphinx-build-wrapper
new file mode 100755
index 000000000000..df469af8a4ef
--- /dev/null
+++ b/tools/docs/sphinx-build-wrapper
@@ -0,0 +1,288 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+import argparse
+import os
+import shlex
+import shutil
+import subprocess
+import sys
+from lib.python_version import PythonVersion
+
+LIB_DIR = "../../scripts/lib"
+SRC_DIR = os.path.dirname(os.path.realpath(__file__))
+sys.path.insert(0, os.path.join(SRC_DIR, LIB_DIR))
+
+from jobserver import JobserverExec
+
+MIN_PYTHON_VERSION = PythonVersion("3.7").version
+PAPER = ["", "a4", "letter"]
+TARGETS = {
+ "cleandocs": { "builder": "clean" },
+ "linkcheckdocs": { "builder": "linkcheck" },
+ "htmldocs": { "builder": "html" },
+ "epubdocs": { "builder": "epub", "out_dir": "epub" },
+ "texinfodocs": { "builder": "texinfo", "out_dir": "texinfo" },
+ "infodocs": { "builder": "texinfo", "out_dir": "texinfo" },
+ "latexdocs": { "builder": "latex", "out_dir": "latex" },
+ "pdfdocs": { "builder": "latex", "out_dir": "latex" },
+ "xmldocs": { "builder": "xml", "out_dir": "xml" },
+}
+
+class SphinxBuilder:
+ def is_rust_enabled(self):
+ config_path = os.path.join(self.srctree, ".config")
+ if os.path.isfile(config_path):
+ with open(config_path, "r", encoding="utf-8") as f:
+ return "CONFIG_RUST=y" in f.read()
+ return False
+
+ def get_path(self, path, abs_path=False):
+ path = os.path.expanduser(path)
+ if not path.startswith("/"):
+ path = os.path.join(self.srctree, path)
+ if abs_path:
+ return os.path.abspath(path)
+ return path
+
+ def __init__(self, verbose=False, n_jobs=None):
+ self.verbose = None
+ self.kernelversion = os.environ.get("KERNELVERSION", "unknown")
+ self.kernelrelease = os.environ.get("KERNELRELEASE", "unknown")
+ self.pdflatex = os.environ.get("PDFLATEX", "xelatex")
+ self.latexopts = os.environ.get("LATEXOPTS", "-interaction=batchmode -no-shell-escape")
+ if not verbose:
+ verbose = bool(os.environ.get("KBUILD_VERBOSE", "") != "")
+ if verbose is not None:
+ self.verbose = verbose
+ parser = argparse.ArgumentParser()
+ parser.add_argument('-j', '--jobs', type=int)
+ parser.add_argument('-q', '--quiet', type=int)
+ sphinxopts = shlex.split(os.environ.get("SPHINXOPTS", ""))
+ sphinx_args, self.sphinxopts = parser.parse_known_args(sphinxopts)
+ if sphinx_args.quiet is True:
+ self.verbose = False
+ if sphinx_args.jobs:
+ self.n_jobs = sphinx_args.jobs
+ self.n_jobs = n_jobs
+ self.srctree = os.environ.get("srctree")
+ if not self.srctree:
+ self.srctree = "."
+ os.environ["srctree"] = self.srctree
+ self.sphinxbuild = os.environ.get("SPHINXBUILD", "sphinx-build")
+ self.kerneldoc = self.get_path(os.environ.get("KERNELDOC",
+ "scripts/kernel-doc.py"))
+ self.obj = os.environ.get("obj", "Documentation")
+ self.builddir = self.get_path(os.path.join(self.obj, "output"),
+ abs_path=True)
+
+ self.config_rust = self.is_rust_enabled()
+
+ self.pdflatex_cmd = shutil.which(self.pdflatex)
+ self.latexmk_cmd = shutil.which("latexmk")
+
+ self.env = os.environ.copy()
+
+ def run_sphinx(self, sphinx_build, build_args, *args, **pwargs):
+ with JobserverExec() as jobserver:
+ if jobserver.claim:
+ n_jobs = str(jobserver.claim)
+ else:
+ n_jobs = "auto" # Supported since Sphinx 1.7
+ cmd = []
+ cmd.append(sys.executable)
+ cmd.append(sphinx_build)
+ if self.n_jobs:
+ n_jobs = str(self.n_jobs)
+
+ if n_jobs:
+ cmd += [f"-j{n_jobs}"]
+
+ if not self.verbose:
+ cmd.append("-q")
+ cmd += self.sphinxopts
+ cmd += build_args
+ if self.verbose:
+ print(" ".join(cmd))
+ return subprocess.call(cmd, *args, **pwargs)
+
+ def handle_html(self, css, output_dir):
+ if not css:
+ return
+ css = os.path.expanduser(css)
+ if not css.startswith("/"):
+ css = os.path.join(self.srctree, css)
+ static_dir = os.path.join(output_dir, "_static")
+ os.makedirs(static_dir, exist_ok=True)
+ try:
+ shutil.copy2(css, static_dir)
+ except (OSError, IOError) as e:
+ print(f"Warning: Failed to copy CSS: {e}", file=sys.stderr)
+
+ def handle_pdf(self, output_dirs):
+ builds = {}
+ max_len = 0
+ for from_dir in output_dirs:
+ pdf_dir = os.path.join(from_dir, "../pdf")
+ os.makedirs(pdf_dir, exist_ok=True)
+ if self.latexmk_cmd:
+ latex_cmd = [self.latexmk_cmd, f"-{self.pdflatex}"]
+ else:
+ latex_cmd = [self.pdflatex]
+ latex_cmd.extend(shlex.split(self.latexopts))
+ tex_suffix = ".tex"
+ has_tex = False
+ build_failed = False
+ with os.scandir(from_dir) as it:
+ for entry in it:
+ if not entry.name.endswith(tex_suffix):
+ continue
+ name = entry.name[:-len(tex_suffix)]
+ has_tex = True
+ try:
+ subprocess.run(latex_cmd + [entry.path],
+ cwd=from_dir, check=True)
+ except subprocess.CalledProcessError:
+ pass
+ pdf_name = name + ".pdf"
+ pdf_from = os.path.join(from_dir, pdf_name)
+ pdf_to = os.path.join(pdf_dir, pdf_name)
+ if os.path.exists(pdf_from):
+ os.rename(pdf_from, pdf_to)
+ builds[name] = os.path.relpath(pdf_to, self.builddir)
+ else:
+ builds[name] = "FAILED"
+ build_failed = True
+ name = entry.name.removesuffix(".tex")
+ max_len = max(max_len, len(name))
+
+ if not has_tex:
+ name = os.path.basename(from_dir)
+ max_len = max(max_len, len(name))
+ builds[name] = "FAILED (no .tex)"
+ build_failed = True
+ msg = "Summary"
+ msg += "\n" + "=" * len(msg)
+ print()
+ print(msg)
+ for pdf_name, pdf_file in builds.items():
+ print(f"{pdf_name:<{max_len}}: {pdf_file}")
+ print()
+ if build_failed:
+ sys.exit("PDF build failed: not all PDF files were created.")
+ else:
+ print("All PDF files were built.")
+
+ def handle_info(self, output_dirs):
+ for output_dir in output_dirs:
+ try:
+ subprocess.run(["make", "info"], cwd=output_dir, check=True)
+ except subprocess.CalledProcessError as e:
+ sys.exit(f"Error generating info docs: {e}")
+
+ def cleandocs(self, builder):
+ shutil.rmtree(self.builddir, ignore_errors=True)
+
+ def build(self, target, sphinxdirs=None, conf="conf.py",
+ theme=None, css=None, paper=None):
+ builder = TARGETS[target]["builder"]
+ out_dir = TARGETS[target].get("out_dir", "")
+ if target == "cleandocs":
+ self.cleandocs(builder)
+ return
+ if theme:
+ os.environ["DOCS_THEME"] = theme
+ sphinxbuild = shutil.which(self.sphinxbuild, path=self.env["PATH"])
+ if not sphinxbuild:
+ sys.exit(f"Error: {self.sphinxbuild} not found in PATH.\n")
+ if builder == "latex":
+ if not self.pdflatex_cmd and not self.latexmk_cmd:
+ sys.exit("Error: pdflatex or latexmk required for PDF generation")
+ docs_dir = os.path.abspath(os.path.join(self.srctree, "Documentation"))
+ kerneldoc = self.kerneldoc
+ if kerneldoc.startswith(self.srctree):
+ kerneldoc = os.path.relpath(kerneldoc, self.srctree)
+ args = [ "-b", builder, "-c", docs_dir ]
+ if builder == "latex":
+ if not paper:
+ paper = PAPER[1]
+ args.extend(["-D", f"latex_elements.papersize={paper}paper"])
+ if self.config_rust:
+ args.extend(["-t", "rustdoc"])
+ if conf:
+ self.env["SPHINX_CONF"] = self.get_path(conf, abs_path=True)
+ if not sphinxdirs:
+ sphinxdirs = os.environ.get("SPHINXDIRS", ".")
+ sphinxdirs_list = []
+ for sphinxdir in sphinxdirs:
+ if isinstance(sphinxdir, list):
+ sphinxdirs_list += sphinxdir
+ else:
+ for name in sphinxdir.split(" "):
+ sphinxdirs_list.append(name)
+ output_dirs = []
+ for sphinxdir in sphinxdirs_list:
+ src_dir = os.path.join(docs_dir, sphinxdir)
+ doctree_dir = os.path.join(self.builddir, ".doctrees")
+ output_dir = os.path.join(self.builddir, sphinxdir, out_dir)
+ src_dir = os.path.normpath(src_dir)
+ doctree_dir = os.path.normpath(doctree_dir)
+ output_dir = os.path.normpath(output_dir)
+ os.makedirs(doctree_dir, exist_ok=True)
+ os.makedirs(output_dir, exist_ok=True)
+ output_dirs.append(output_dir)
+ build_args = args + [
+ "-d", doctree_dir,
+ "-D", f"kerneldoc_bin={kerneldoc}",
+ "-D", f"version={self.kernelversion}",
+ "-D", f"release={self.kernelrelease}",
+ "-D", f"kerneldoc_srctree={self.srctree}",
+ src_dir,
+ 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 in ["htmldocs", "epubdocs"]:
+ self.handle_html(css, output_dir)
+ if target == "pdfdocs":
+ self.handle_pdf(output_dirs)
+ elif target == "infodocs":
+ self.handle_info(output_dirs)
+
+def jobs_type(value):
+ if value is None:
+ return None
+ if value.lower() == 'auto':
+ return value.lower()
+ try:
+ if int(value) >= 1:
+ return value
+ raise argparse.ArgumentTypeError(f"Minimum jobs is 1, got {value}")
+ except ValueError:
+ raise argparse.ArgumentTypeError(f"Must be 'auto' or positive integer, got {value}")
+
+def main():
+ parser = argparse.ArgumentParser(description="Kernel documentation builder")
+ parser.add_argument("target", choices=list(TARGETS.keys()),
+ help="Documentation target to build")
+ parser.add_argument("--sphinxdirs", nargs="+",
+ help="Specific directories to build")
+ parser.add_argument("--conf", default="conf.py",
+ help="Sphinx configuration file")
+ parser.add_argument("--theme", help="Sphinx theme to use")
+ parser.add_argument("--css", help="Custom CSS file for HTML/EPUB")
+ parser.add_argument("--paper", choices=PAPER, default=PAPER[0],
+ help="Paper size for LaTeX/PDF output")
+ parser.add_argument("-v", "--verbose", action='store_true',
+ help="place build in verbose mode")
+ parser.add_argument('-j', '--jobs', type=jobs_type,
+ help="Sets number of jobs to use with sphinx-build")
+ args = parser.parse_args()
+ PythonVersion.check_python(MIN_PYTHON_VERSION)
+ builder = SphinxBuilder(verbose=args.verbose, n_jobs=args.jobs)
+ builder.build(args.target, sphinxdirs=args.sphinxdirs, conf=args.conf,
+ theme=args.theme, css=args.css, paper=args.paper)
+
+if __name__ == "__main__":
+ main()
--
2.51.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v2 07/13] tools/docs: sphinx-build-wrapper: add comments and blank lines
2025-08-25 16:30 [PATCH v2 00/13] Split sphinx call logic from docs Makefile Mauro Carvalho Chehab
` (5 preceding siblings ...)
2025-08-25 16:30 ` [PATCH v2 06/13] tools/docs: sphinx-build-wrapper: add a wrapper for sphinx-build Mauro Carvalho Chehab
@ 2025-08-25 16:30 ` Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 08/13] tools/docs: sphinx-build-wrapper: add support to run inside venv Mauro Carvalho Chehab
` (5 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Mauro Carvalho Chehab @ 2025-08-25 16:30 UTC (permalink / raw)
To: Linux Doc Mailing List
Cc: Mauro Carvalho Chehab, Björn Roy Baron, Jonathan Corbet,
Mauro Carvalho Chehab, Alex Gaynor, Alice Ryhl, Andreas Hindborg,
Benno Lossin, Boqun Feng, Danilo Krummrich, Gary Guo,
Miguel Ojeda, Trevor Gross, linux-kernel, rust-for-linux
To help seing the actual size of the script when it was added,
I opted to strip out all comments from the original script.
Add them here:
tools/docs/sphinx-build-wrapper | 261 +++++++++++++++++++++++++++++++-
1 file changed, 257 insertions(+), 4 deletion(-)
As the code from the script has 288 lines of code, it means that
about half of the script are comments.
Also ensure pylint won't report any warnings.
No functional changes.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
tools/docs/sphinx-build-wrapper | 261 +++++++++++++++++++++++++++++++-
1 file changed, 257 insertions(+), 4 deletions(-)
diff --git a/tools/docs/sphinx-build-wrapper b/tools/docs/sphinx-build-wrapper
index df469af8a4ef..e9c522794fbe 100755
--- a/tools/docs/sphinx-build-wrapper
+++ b/tools/docs/sphinx-build-wrapper
@@ -1,21 +1,71 @@
#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2025 Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
+#
+# pylint: disable=R0902, R0912, R0913, R0914, R0915, R0917, C0103
+#
+# Converted from docs Makefile and parallel-wrapper.sh, both under
+# GPLv2, copyrighted since 2008 by the following authors:
+#
+# Akira Yokosawa <akiyks@gmail.com>
+# Arnd Bergmann <arnd@arndb.de>
+# Breno Leitao <leitao@debian.org>
+# Carlos Bilbao <carlos.bilbao@amd.com>
+# Dave Young <dyoung@redhat.com>
+# Donald Hunter <donald.hunter@gmail.com>
+# Geert Uytterhoeven <geert+renesas@glider.be>
+# Jani Nikula <jani.nikula@intel.com>
+# Jan Stancek <jstancek@redhat.com>
+# Jonathan Corbet <corbet@lwn.net>
+# Joshua Clayton <stillcompiling@gmail.com>
+# Kees Cook <keescook@chromium.org>
+# Linus Torvalds <torvalds@linux-foundation.org>
+# Magnus Damm <damm+renesas@opensource.se>
+# Masahiro Yamada <masahiroy@kernel.org>
+# Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
+# Maxim Cournoyer <maxim.cournoyer@gmail.com>
+# Peter Foley <pefoley2@pefoley.com>
+# Randy Dunlap <rdunlap@infradead.org>
+# Rob Herring <robh@kernel.org>
+# Shuah Khan <shuahkh@osg.samsung.com>
+# Thorsten Blum <thorsten.blum@toblux.com>
+# Tomas Winkler <tomas.winkler@intel.com>
+
+
+"""
+Sphinx build wrapper that handles Kernel-specific business rules:
+
+- it gets the Kernel build environment vars;
+- it determines what's the best parallelism;
+- it handles SPHINXDIRS
+
+This tool ensures that MIN_PYTHON_VERSION is satisfied. If version is
+below that, it seeks for a new Python version. If found, it re-runs using
+the newer version.
+"""
+
import argparse
import os
import shlex
import shutil
import subprocess
import sys
+
from lib.python_version import PythonVersion
LIB_DIR = "../../scripts/lib"
SRC_DIR = os.path.dirname(os.path.realpath(__file__))
+
sys.path.insert(0, os.path.join(SRC_DIR, LIB_DIR))
-from jobserver import JobserverExec
+from jobserver import JobserverExec # pylint: disable=C0413,C0411,E0401
+#
+# Some constants
+#
MIN_PYTHON_VERSION = PythonVersion("3.7").version
PAPER = ["", "a4", "letter"]
+
TARGETS = {
"cleandocs": { "builder": "clean" },
"linkcheckdocs": { "builder": "linkcheck" },
@@ -28,8 +78,19 @@ TARGETS = {
"xmldocs": { "builder": "xml", "out_dir": "xml" },
}
+
+#
+# SphinxBuilder class
+#
+
class SphinxBuilder:
+ """
+ Handles a sphinx-build target, adding needed arguments to build
+ with the Kernel.
+ """
+
def is_rust_enabled(self):
+ """Check if rust is enabled at .config"""
config_path = os.path.join(self.srctree, ".config")
if os.path.isfile(config_path):
with open(config_path, "r", encoding="utf-8") as f:
@@ -37,37 +98,83 @@ class SphinxBuilder:
return False
def get_path(self, path, abs_path=False):
+ """
+ Ancillary routine to handle patches the right way, as shell does.
+
+ It first expands "~" and "~user". Then, if patch is not absolute,
+ join self.srctree. Finally, if requested, convert to abspath.
+ """
+
path = os.path.expanduser(path)
if not path.startswith("/"):
path = os.path.join(self.srctree, path)
+
if abs_path:
return os.path.abspath(path)
+
return path
def __init__(self, verbose=False, n_jobs=None):
+ """Initialize internal variables"""
self.verbose = None
+
+ #
+ # Normal variables passed from Kernel's makefile
+ #
self.kernelversion = os.environ.get("KERNELVERSION", "unknown")
self.kernelrelease = os.environ.get("KERNELRELEASE", "unknown")
self.pdflatex = os.environ.get("PDFLATEX", "xelatex")
self.latexopts = os.environ.get("LATEXOPTS", "-interaction=batchmode -no-shell-escape")
+
if not verbose:
verbose = bool(os.environ.get("KBUILD_VERBOSE", "") != "")
+
if verbose is not None:
self.verbose = verbose
+
+ #
+ # As we handle number of jobs and quiet in separate, we need to pick
+ # both the same way as sphinx-build would pick, optionally accepts
+ # whitespaces or not. So let's use argparse to handle argument expansion
+ #
parser = argparse.ArgumentParser()
parser.add_argument('-j', '--jobs', type=int)
parser.add_argument('-q', '--quiet', type=int)
+
+ #
+ # Other sphinx-build arguments go as-is, so place them
+ # at self.sphinxopts, using shell parser
+ #
sphinxopts = shlex.split(os.environ.get("SPHINXOPTS", ""))
+
+ #
+ # Build a list of sphinx args
+ #
sphinx_args, self.sphinxopts = parser.parse_known_args(sphinxopts)
if sphinx_args.quiet is True:
self.verbose = False
+
if sphinx_args.jobs:
self.n_jobs = sphinx_args.jobs
+
+ #
+ # If the command line argument "-j" is used override SPHINXOPTS
+ #
+
self.n_jobs = n_jobs
+
+ #
+ # Source tree directory. This needs to be at os.environ, as
+ # Sphinx extensions use it
+ #
self.srctree = os.environ.get("srctree")
if not self.srctree:
self.srctree = "."
os.environ["srctree"] = self.srctree
+
+ #
+ # Now that we can expand srctree, get other directories as well
+ #
self.sphinxbuild = os.environ.get("SPHINXBUILD", "sphinx-build")
self.kerneldoc = self.get_path(os.environ.get("KERNELDOC",
"scripts/kernel-doc.py"))
@@ -77,20 +184,36 @@ class SphinxBuilder:
self.config_rust = self.is_rust_enabled()
+ #
+ # Get directory locations for LaTeX build toolchain
+ #
self.pdflatex_cmd = shutil.which(self.pdflatex)
self.latexmk_cmd = shutil.which("latexmk")
self.env = os.environ.copy()
def run_sphinx(self, sphinx_build, build_args, *args, **pwargs):
+ """
+ Executes sphinx-build using current python3 command and setting
+ -j parameter if possible to run the build in parallel.
+ """
+
with JobserverExec() as jobserver:
if jobserver.claim:
n_jobs = str(jobserver.claim)
else:
n_jobs = "auto" # Supported since Sphinx 1.7
+
cmd = []
+
cmd.append(sys.executable)
+
cmd.append(sphinx_build)
+
+ #
+ # Override auto setting, if explicitly passed from command line
+ # or via SPHINXOPTS
+ #
if self.n_jobs:
n_jobs = str(self.n_jobs)
@@ -99,59 +222,100 @@ class SphinxBuilder:
if not self.verbose:
cmd.append("-q")
+
cmd += self.sphinxopts
cmd += build_args
+
if self.verbose:
print(" ".join(cmd))
return subprocess.call(cmd, *args, **pwargs)
def handle_html(self, css, output_dir):
+ """
+ Extra steps for HTML and epub output.
+
+ For such targets, we need to ensure that CSS will be properly
+ copied to the output _static directory
+ """
+
if not css:
return
+
css = os.path.expanduser(css)
if not css.startswith("/"):
css = os.path.join(self.srctree, css)
+
static_dir = os.path.join(output_dir, "_static")
os.makedirs(static_dir, exist_ok=True)
+
try:
shutil.copy2(css, static_dir)
except (OSError, IOError) as e:
print(f"Warning: Failed to copy CSS: {e}", file=sys.stderr)
def handle_pdf(self, output_dirs):
+ """
+ Extra steps for PDF output.
+
+ As PDF is handled via a LaTeX output, after building the .tex file,
+ a new build is needed to create the PDF output from the latex
+ directory.
+ """
builds = {}
max_len = 0
+
for from_dir in output_dirs:
pdf_dir = os.path.join(from_dir, "../pdf")
os.makedirs(pdf_dir, exist_ok=True)
+
if self.latexmk_cmd:
latex_cmd = [self.latexmk_cmd, f"-{self.pdflatex}"]
else:
latex_cmd = [self.pdflatex]
+
latex_cmd.extend(shlex.split(self.latexopts))
+
tex_suffix = ".tex"
+
+ #
+ # Process each .tex file
+ #
+
has_tex = False
build_failed = False
with os.scandir(from_dir) as it:
for entry in it:
if not entry.name.endswith(tex_suffix):
continue
+
name = entry.name[:-len(tex_suffix)]
has_tex = True
+
+ #
+ # LaTeX PDF error code is almost useless for us:
+ # any warning makes it non-zero. For kernel doc builds it
+ # always return non-zero even when build succeeds.
+ # So, let's do the best next thing: check if all PDF
+ # files were built. If they're, print a summary and
+ # return 0 at the end of this function
+ #
try:
subprocess.run(latex_cmd + [entry.path],
cwd=from_dir, check=True)
except subprocess.CalledProcessError:
pass
+
pdf_name = name + ".pdf"
pdf_from = os.path.join(from_dir, pdf_name)
pdf_to = os.path.join(pdf_dir, pdf_name)
+
if os.path.exists(pdf_from):
os.rename(pdf_from, pdf_to)
builds[name] = os.path.relpath(pdf_to, self.builddir)
else:
builds[name] = "FAILED"
build_failed = True
+
name = entry.name.removesuffix(".tex")
max_len = max(max_len, len(name))
@@ -160,58 +324,100 @@ class SphinxBuilder:
max_len = max(max_len, len(name))
builds[name] = "FAILED (no .tex)"
build_failed = True
+
msg = "Summary"
msg += "\n" + "=" * len(msg)
print()
print(msg)
+
for pdf_name, pdf_file in builds.items():
print(f"{pdf_name:<{max_len}}: {pdf_file}")
+
print()
+
if build_failed:
sys.exit("PDF build failed: not all PDF files were created.")
else:
print("All PDF files were built.")
def handle_info(self, output_dirs):
+ """
+ Extra steps for Info output.
+
+ For texinfo generation, an additional make is needed from the
+ texinfo directory.
+ """
+
for output_dir in output_dirs:
try:
subprocess.run(["make", "info"], cwd=output_dir, check=True)
except subprocess.CalledProcessError as e:
sys.exit(f"Error generating info docs: {e}")
- def cleandocs(self, builder):
+ def cleandocs(self, builder): # pylint: disable=W0613
+ """Remove documentation output directory"""
shutil.rmtree(self.builddir, ignore_errors=True)
def build(self, target, sphinxdirs=None, conf="conf.py",
theme=None, css=None, paper=None):
+ """
+ Build documentation using Sphinx. This is the core function of this
+ module. It prepares all arguments required by sphinx-build.
+ """
+
builder = TARGETS[target]["builder"]
out_dir = TARGETS[target].get("out_dir", "")
+
+ #
+ # Cleandocs doesn't require sphinx-build
+ #
if target == "cleandocs":
self.cleandocs(builder)
return
+
if theme:
- os.environ["DOCS_THEME"] = theme
+ os.environ["DOCS_THEME"] = theme
+
+ #
+ # Other targets require sphinx-build, so check if it exists
+ #
sphinxbuild = shutil.which(self.sphinxbuild, path=self.env["PATH"])
if not sphinxbuild:
sys.exit(f"Error: {self.sphinxbuild} not found in PATH.\n")
+
if builder == "latex":
if not self.pdflatex_cmd and not self.latexmk_cmd:
sys.exit("Error: pdflatex or latexmk required for PDF generation")
+
docs_dir = os.path.abspath(os.path.join(self.srctree, "Documentation"))
+
+ #
+ # Fill in base arguments for Sphinx build
+ #
kerneldoc = self.kerneldoc
if kerneldoc.startswith(self.srctree):
kerneldoc = os.path.relpath(kerneldoc, self.srctree)
+
args = [ "-b", builder, "-c", docs_dir ]
+
if builder == "latex":
if not paper:
paper = PAPER[1]
+
args.extend(["-D", f"latex_elements.papersize={paper}paper"])
+
if self.config_rust:
args.extend(["-t", "rustdoc"])
+
if conf:
self.env["SPHINX_CONF"] = self.get_path(conf, abs_path=True)
+
if not sphinxdirs:
sphinxdirs = os.environ.get("SPHINXDIRS", ".")
+
+ #
+ # sphinxdirs can be a list or a whitespace-separated string
+ #
sphinxdirs_list = []
for sphinxdir in sphinxdirs:
if isinstance(sphinxdir, list):
@@ -219,17 +425,32 @@ class SphinxBuilder:
else:
for name in sphinxdir.split(" "):
sphinxdirs_list.append(name)
+
+ #
+ # Step 1: Build each directory in separate.
+ #
+ # This is not the best way of handling it, as cross-references between
+ # them will be broken, but this is what we've been doing since
+ # the beginning.
+ #
output_dirs = []
for sphinxdir in sphinxdirs_list:
src_dir = os.path.join(docs_dir, sphinxdir)
doctree_dir = os.path.join(self.builddir, ".doctrees")
output_dir = os.path.join(self.builddir, sphinxdir, out_dir)
+
+ #
+ # Make directory names canonical
+ #
src_dir = os.path.normpath(src_dir)
doctree_dir = os.path.normpath(doctree_dir)
output_dir = os.path.normpath(output_dir)
+
os.makedirs(doctree_dir, exist_ok=True)
os.makedirs(output_dir, exist_ok=True)
+
output_dirs.append(output_dir)
+
build_args = args + [
"-d", doctree_dir,
"-D", f"kerneldoc_bin={kerneldoc}",
@@ -239,48 +460,80 @@ class SphinxBuilder:
src_dir,
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)}")
+
+ #
+ # Ensure that each html/epub output will have needed static files
+ #
if target in ["htmldocs", "epubdocs"]:
self.handle_html(css, output_dir)
+
+ #
+ # Step 2: Some targets (PDF and info) require an extra step once
+ # sphinx-build finishes
+ #
if target == "pdfdocs":
self.handle_pdf(output_dirs)
elif target == "infodocs":
self.handle_info(output_dirs)
def jobs_type(value):
+ """
+ Handle valid values for -j. Accepts Sphinx "-jauto", plus a number
+ equal or bigger than one.
+ """
if value is None:
return None
+
if value.lower() == 'auto':
return value.lower()
+
try:
if int(value) >= 1:
return value
+
raise argparse.ArgumentTypeError(f"Minimum jobs is 1, got {value}")
except ValueError:
- raise argparse.ArgumentTypeError(f"Must be 'auto' or positive integer, got {value}")
+ raise argparse.ArgumentTypeError(f"Must be 'auto' or positive integer, got {value}") # pylint: disable=W0707
def main():
+ """
+ Main function. The only mandatory argument is the target. If not
+ specified, the other arguments will use default values if not
+ specified at os.environ.
+ """
parser = argparse.ArgumentParser(description="Kernel documentation builder")
+
parser.add_argument("target", choices=list(TARGETS.keys()),
help="Documentation target to build")
parser.add_argument("--sphinxdirs", nargs="+",
help="Specific directories to build")
parser.add_argument("--conf", default="conf.py",
help="Sphinx configuration file")
+
parser.add_argument("--theme", help="Sphinx theme to use")
+
parser.add_argument("--css", help="Custom CSS file for HTML/EPUB")
+
parser.add_argument("--paper", choices=PAPER, default=PAPER[0],
help="Paper size for LaTeX/PDF output")
+
parser.add_argument("-v", "--verbose", action='store_true',
help="place build in verbose mode")
+
parser.add_argument('-j', '--jobs', type=jobs_type,
help="Sets number of jobs to use with sphinx-build")
+
args = parser.parse_args()
+
PythonVersion.check_python(MIN_PYTHON_VERSION)
+
builder = SphinxBuilder(verbose=args.verbose, n_jobs=args.jobs)
+
builder.build(args.target, sphinxdirs=args.sphinxdirs, conf=args.conf,
theme=args.theme, css=args.css, paper=args.paper)
--
2.51.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v2 08/13] tools/docs: sphinx-build-wrapper: add support to run inside venv
2025-08-25 16:30 [PATCH v2 00/13] Split sphinx call logic from docs Makefile Mauro Carvalho Chehab
` (6 preceding siblings ...)
2025-08-25 16:30 ` [PATCH v2 07/13] tools/docs: sphinx-build-wrapper: add comments and blank lines Mauro Carvalho Chehab
@ 2025-08-25 16:30 ` Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 09/13] docs: parallel-wrapper.sh: remove script Mauro Carvalho Chehab
` (4 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Mauro Carvalho Chehab @ 2025-08-25 16:30 UTC (permalink / raw)
To: Linux Doc Mailing List
Cc: Mauro Carvalho Chehab, Jonathan Corbet, Mauro Carvalho Chehab,
linux-kernel
Sometimes, it is desired to run Sphinx from a virtual environment.
Add a command line parameter to automatically build Sphinx from
such environment.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
tools/docs/sphinx-build-wrapper | 31 ++++++++++++++++++++++++++++---
1 file changed, 28 insertions(+), 3 deletions(-)
diff --git a/tools/docs/sphinx-build-wrapper b/tools/docs/sphinx-build-wrapper
index e9c522794fbe..9c5df50fb99d 100755
--- a/tools/docs/sphinx-build-wrapper
+++ b/tools/docs/sphinx-build-wrapper
@@ -63,6 +63,7 @@ from jobserver import JobserverExec # pylint: disable=C0413,C0411,E0401
#
# Some constants
#
+VENV_DEFAULT = "sphinx_latest"
MIN_PYTHON_VERSION = PythonVersion("3.7").version
PAPER = ["", "a4", "letter"]
@@ -114,8 +115,9 @@ class SphinxBuilder:
return path
- def __init__(self, verbose=False, n_jobs=None):
+ def __init__(self, venv=None, verbose=False, n_jobs=None):
"""Initialize internal variables"""
+ self.venv = venv
self.verbose = None
#
@@ -192,6 +194,21 @@ class SphinxBuilder:
self.env = os.environ.copy()
+ #
+ # If venv command line argument is specified, run Sphinx from venv
+ #
+ if venv:
+ bin_dir = os.path.join(venv, "bin")
+ if not os.path.isfile(os.path.join(bin_dir, "activate")):
+ sys.exit(f"Venv {venv} not found.")
+
+ # "activate" virtual env
+ self.env["PATH"] = bin_dir + ":" + self.env["PATH"]
+ self.env["VIRTUAL_ENV"] = venv
+ if "PYTHONHOME" in self.env:
+ del self.env["PYTHONHOME"]
+ print(f"Setting venv to {venv}")
+
def run_sphinx(self, sphinx_build, build_args, *args, **pwargs):
"""
Executes sphinx-build using current python3 command and setting
@@ -206,7 +223,10 @@ class SphinxBuilder:
cmd = []
- cmd.append(sys.executable)
+ if self.venv:
+ cmd.append("python")
+ else:
+ cmd.append(sys.executable)
cmd.append(sphinx_build)
@@ -528,11 +548,16 @@ def main():
parser.add_argument('-j', '--jobs', type=jobs_type,
help="Sets number of jobs to use with sphinx-build")
+ parser.add_argument("-V", "--venv", nargs='?', const=f'{VENV_DEFAULT}',
+ default=None,
+ help=f'If used, run Sphinx from a venv dir (default dir: {VENV_DEFAULT})')
+
args = parser.parse_args()
PythonVersion.check_python(MIN_PYTHON_VERSION)
- builder = SphinxBuilder(verbose=args.verbose, n_jobs=args.jobs)
+ builder = SphinxBuilder(venv=args.venv, verbose=args.verbose,
+ n_jobs=args.jobs)
builder.build(args.target, sphinxdirs=args.sphinxdirs, conf=args.conf,
theme=args.theme, css=args.css, paper=args.paper)
--
2.51.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v2 09/13] docs: parallel-wrapper.sh: remove script
2025-08-25 16:30 [PATCH v2 00/13] Split sphinx call logic from docs Makefile Mauro Carvalho Chehab
` (7 preceding siblings ...)
2025-08-25 16:30 ` [PATCH v2 08/13] tools/docs: sphinx-build-wrapper: add support to run inside venv Mauro Carvalho Chehab
@ 2025-08-25 16:30 ` Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 10/13] docs: Makefile: document latex/PDF PAPER= parameter Mauro Carvalho Chehab
` (3 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Mauro Carvalho Chehab @ 2025-08-25 16:30 UTC (permalink / raw)
To: Linux Doc Mailing List
Cc: Mauro Carvalho Chehab, Jonathan Corbet, Mauro Carvalho Chehab,
linux-kernel
The only usage of this script was docs Makefile. Now that
it is using the new sphinx-build-wrapper, which has inside
the code from parallel-wrapper.sh, we can drop this script.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
Documentation/sphinx/parallel-wrapper.sh | 33 ------------------------
1 file changed, 33 deletions(-)
delete mode 100644 Documentation/sphinx/parallel-wrapper.sh
diff --git a/Documentation/sphinx/parallel-wrapper.sh b/Documentation/sphinx/parallel-wrapper.sh
deleted file mode 100644
index e54c44ce117d..000000000000
--- a/Documentation/sphinx/parallel-wrapper.sh
+++ /dev/null
@@ -1,33 +0,0 @@
-#!/bin/sh
-# SPDX-License-Identifier: GPL-2.0+
-#
-# Figure out if we should follow a specific parallelism from the make
-# environment (as exported by scripts/jobserver-exec), or fall back to
-# the "auto" parallelism when "-jN" is not specified at the top-level
-# "make" invocation.
-
-sphinx="$1"
-shift || true
-
-parallel="$PARALLELISM"
-if [ -z "$parallel" ] ; then
- # If no parallelism is specified at the top-level make, then
- # fall back to the expected "-jauto" mode that the "htmldocs"
- # target has had.
- auto=$(perl -e 'open IN,"'"$sphinx"' --version 2>&1 |";
- while (<IN>) {
- if (m/([\d\.]+)/) {
- print "auto" if ($1 >= "1.7")
- }
- }
- close IN')
- if [ -n "$auto" ] ; then
- parallel="$auto"
- fi
-fi
-# Only if some parallelism has been determined do we add the -jN option.
-if [ -n "$parallel" ] ; then
- parallel="-j$parallel"
-fi
-
-exec "$sphinx" $parallel "$@"
--
2.51.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v2 10/13] docs: Makefile: document latex/PDF PAPER= parameter
2025-08-25 16:30 [PATCH v2 00/13] Split sphinx call logic from docs Makefile Mauro Carvalho Chehab
` (8 preceding siblings ...)
2025-08-25 16:30 ` [PATCH v2 09/13] docs: parallel-wrapper.sh: remove script Mauro Carvalho Chehab
@ 2025-08-25 16:30 ` Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 11/13] tools/docs: sphinx-build-wrapper: add an argument for LaTeX interactive mode Mauro Carvalho Chehab
` (2 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Mauro Carvalho Chehab @ 2025-08-25 16:30 UTC (permalink / raw)
To: Linux Doc Mailing List
Cc: Mauro Carvalho Chehab, Jonathan Corbet, Mauro Carvalho Chehab,
linux-kernel
While the build system supports this for a long time, this was
never documented. Add a documentation for it.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
Documentation/Makefile | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Documentation/Makefile b/Documentation/Makefile
index 2b0ed8cd5ea8..3e1cb44a5fbb 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -124,4 +124,6 @@ dochelp:
@echo
@echo ' make DOCS_CSS={a .css file} adds a DOCS_CSS override file for html/epub output.'
@echo
+ @echo ' make PAPER={a4|letter} Specifies the paper size used for LaTeX/PDF output.'
+ @echo
@echo ' Default location for the generated documents is Documentation/output'
--
2.51.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v2 11/13] tools/docs: sphinx-build-wrapper: add an argument for LaTeX interactive mode
2025-08-25 16:30 [PATCH v2 00/13] Split sphinx call logic from docs Makefile Mauro Carvalho Chehab
` (9 preceding siblings ...)
2025-08-25 16:30 ` [PATCH v2 10/13] docs: Makefile: document latex/PDF PAPER= parameter Mauro Carvalho Chehab
@ 2025-08-25 16:30 ` Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 12/13] tools/docs,scripts: sphinx-*: prevent sphinx-build crashes Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 13/13] tools/docs: sphinx-build-wrapper: allow building PDF files in parallel Mauro Carvalho Chehab
12 siblings, 0 replies; 14+ messages in thread
From: Mauro Carvalho Chehab @ 2025-08-25 16:30 UTC (permalink / raw)
To: Linux Doc Mailing List
Cc: Mauro Carvalho Chehab, Jonathan Corbet, Mauro Carvalho Chehab,
linux-kernel
By default, we use LaTeX batch mode to build docs. This way, when
an error happens, the build fails. This is good for normal builds,
but when debugging problems with pdf generation, the best is to
use interactive mode.
We already support it via LATEXOPTS, but having a command line
argument makes it easier:
Interactive mode:
./scripts/sphinx-build-wrapper pdfdocs --sphinxdirs peci -v -i
...
Running 'xelatex --no-pdf -no-pdf -recorder ".../Documentation/output/peci/latex/peci.tex"'
...
Default batch mode:
./scripts/sphinx-build-wrapper pdfdocs --sphinxdirs peci -v
...
Running 'xelatex --no-pdf -no-pdf -interaction=batchmode -no-shell-escape -recorder ".../Documentation/output/peci/latex/peci.tex"'
...
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
tools/docs/sphinx-build-wrapper | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/tools/docs/sphinx-build-wrapper b/tools/docs/sphinx-build-wrapper
index 9c5df50fb99d..4e87584a92cd 100755
--- a/tools/docs/sphinx-build-wrapper
+++ b/tools/docs/sphinx-build-wrapper
@@ -115,7 +115,7 @@ class SphinxBuilder:
return path
- def __init__(self, venv=None, verbose=False, n_jobs=None):
+ def __init__(self, venv=None, verbose=False, n_jobs=None, interactive=None):
"""Initialize internal variables"""
self.venv = venv
self.verbose = None
@@ -126,7 +126,11 @@ class SphinxBuilder:
self.kernelversion = os.environ.get("KERNELVERSION", "unknown")
self.kernelrelease = os.environ.get("KERNELRELEASE", "unknown")
self.pdflatex = os.environ.get("PDFLATEX", "xelatex")
- self.latexopts = os.environ.get("LATEXOPTS", "-interaction=batchmode -no-shell-escape")
+
+ if not interactive:
+ self.latexopts = os.environ.get("LATEXOPTS", "-interaction=batchmode -no-shell-escape")
+ else:
+ self.latexopts = os.environ.get("LATEXOPTS", "")
if not verbose:
verbose = bool(os.environ.get("KBUILD_VERBOSE", "") != "")
@@ -548,6 +552,9 @@ def main():
parser.add_argument('-j', '--jobs', type=jobs_type,
help="Sets number of jobs to use with sphinx-build")
+ parser.add_argument('-i', '--interactive', action='store_true',
+ help="Change latex default to run in interactive mode")
+
parser.add_argument("-V", "--venv", nargs='?', const=f'{VENV_DEFAULT}',
default=None,
help=f'If used, run Sphinx from a venv dir (default dir: {VENV_DEFAULT})')
@@ -557,7 +564,7 @@ def main():
PythonVersion.check_python(MIN_PYTHON_VERSION)
builder = SphinxBuilder(venv=args.venv, verbose=args.verbose,
- n_jobs=args.jobs)
+ n_jobs=args.jobs, interactive=args.interactive)
builder.build(args.target, sphinxdirs=args.sphinxdirs, conf=args.conf,
theme=args.theme, css=args.css, paper=args.paper)
--
2.51.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v2 12/13] tools/docs,scripts: sphinx-*: prevent sphinx-build crashes
2025-08-25 16:30 [PATCH v2 00/13] Split sphinx call logic from docs Makefile Mauro Carvalho Chehab
` (10 preceding siblings ...)
2025-08-25 16:30 ` [PATCH v2 11/13] tools/docs: sphinx-build-wrapper: add an argument for LaTeX interactive mode Mauro Carvalho Chehab
@ 2025-08-25 16:30 ` Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 13/13] tools/docs: sphinx-build-wrapper: allow building PDF files in parallel Mauro Carvalho Chehab
12 siblings, 0 replies; 14+ messages in thread
From: Mauro Carvalho Chehab @ 2025-08-25 16:30 UTC (permalink / raw)
To: Linux Doc Mailing List
Cc: Mauro Carvalho Chehab, Jonathan Corbet, Mauro Carvalho Chehab,
linux-kernel
On a properly set system, LANG and LC_ALL is always defined.
However, some distros like Debian, Gentoo and their variants
start with those undefioned.
When Sphinx tries to set a locale with:
locale.setlocale(locale.LC_ALL, '')
It raises an exception, making Sphinx fail. This is more likely
to happen with test containers.
Add a logic to detect and workaround such issue by setting
locale to C.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
tools/docs/sphinx-build-wrapper | 11 +++++++++++
tools/docs/sphinx-pre-install | 14 +++++++++++++-
2 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/tools/docs/sphinx-build-wrapper b/tools/docs/sphinx-build-wrapper
index 4e87584a92cd..580582a76c93 100755
--- a/tools/docs/sphinx-build-wrapper
+++ b/tools/docs/sphinx-build-wrapper
@@ -45,6 +45,7 @@ the newer version.
"""
import argparse
+import locale
import os
import shlex
import shutil
@@ -439,6 +440,16 @@ class SphinxBuilder:
if not sphinxdirs:
sphinxdirs = os.environ.get("SPHINXDIRS", ".")
+ #
+ # The sphinx-build tool has a bug: internally, it tries to set
+ # locale with locale.setlocale(locale.LC_ALL, ''). This causes a
+ # crash if language is not set. Detect and fix it.
+ #
+ try:
+ locale.setlocale(locale.LC_ALL, '')
+ except locale.Error:
+ self.env["LC_ALL"] = "C"
+
#
# sphinxdirs can be a list or a whitespace-separated string
#
diff --git a/tools/docs/sphinx-pre-install b/tools/docs/sphinx-pre-install
index d6d673b7945c..663d4e2a3f57 100755
--- a/tools/docs/sphinx-pre-install
+++ b/tools/docs/sphinx-pre-install
@@ -26,6 +26,7 @@ system pacage install is recommended.
"""
import argparse
+import locale
import os
import re
import subprocess
@@ -422,8 +423,19 @@ class MissingCheckers(AncillaryMethods):
"""
Gets sphinx-build version.
"""
+ env = os.environ.copy()
+
+ # The sphinx-build tool has a bug: internally, it tries to set
+ # locale with locale.setlocale(locale.LC_ALL, ''). This causes a
+ # crash if language is not set. Detect and fix it.
try:
- result = self.run([cmd, "--version"],
+ locale.setlocale(locale.LC_ALL, '')
+ except Exception:
+ env["LC_ALL"] = "C"
+ env["LANG"] = "C"
+
+ try:
+ result = self.run([cmd, "--version"], env=env,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
text=True, check=True)
--
2.51.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v2 13/13] tools/docs: sphinx-build-wrapper: allow building PDF files in parallel
2025-08-25 16:30 [PATCH v2 00/13] Split sphinx call logic from docs Makefile Mauro Carvalho Chehab
` (11 preceding siblings ...)
2025-08-25 16:30 ` [PATCH v2 12/13] tools/docs,scripts: sphinx-*: prevent sphinx-build crashes Mauro Carvalho Chehab
@ 2025-08-25 16:30 ` Mauro Carvalho Chehab
12 siblings, 0 replies; 14+ messages in thread
From: Mauro Carvalho Chehab @ 2025-08-25 16:30 UTC (permalink / raw)
To: Linux Doc Mailing List
Cc: Mauro Carvalho Chehab, Jonathan Corbet, Mauro Carvalho Chehab,
linux-kernel
Use POSIX jobserver when available or -j<number> to run PDF
builds in parallel, restoring pdf build performance. Yet,
running it when debugging troubles is a bad idea, so, when
calling directly via command line, except if "-j" is splicitly
requested, it will serialize the build.
With such change, a PDF doc builds now takes around 5 minutes
on a Ryzen 9 machine with 32 cpu threads:
# Explicitly paralelize both Sphinx and LaTeX pdf builds
$ make cleandocs; time scripts/sphinx-build-wrapper pdfdocs -j 33
real 5m17.901s
user 15m1.499s
sys 2m31.482s
# Use POSIX jobserver to paralelize both sphinx-build and LaTeX
$ make cleandocs; time make pdfdocs
real 5m22.369s
user 15m9.076s
sys 2m31.419s
# Serializes PDF build, while keeping Sphinx parallelized.
# it is equivalent of passing -jauto via command line
$ make cleandocs; time scripts/sphinx-build-wrapper pdfdocs
real 11m20.901s
user 13m2.910s
sys 1m44.553s
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
tools/docs/sphinx-build-wrapper | 158 +++++++++++++++++++++++---------
1 file changed, 117 insertions(+), 41 deletions(-)
diff --git a/tools/docs/sphinx-build-wrapper b/tools/docs/sphinx-build-wrapper
index 580582a76c93..c884022ad733 100755
--- a/tools/docs/sphinx-build-wrapper
+++ b/tools/docs/sphinx-build-wrapper
@@ -52,6 +52,8 @@ import shutil
import subprocess
import sys
+from concurrent import futures
+
from lib.python_version import PythonVersion
LIB_DIR = "../../scripts/lib"
@@ -278,6 +280,82 @@ class SphinxBuilder:
except (OSError, IOError) as e:
print(f"Warning: Failed to copy CSS: {e}", file=sys.stderr)
+ def build_pdf_file(self, latex_cmd, from_dir, path):
+ """Builds a single pdf file using latex_cmd"""
+ try:
+ subprocess.run(latex_cmd + [path],
+ cwd=from_dir, check=True)
+
+ return True
+ except subprocess.CalledProcessError:
+ return False
+
+ def pdf_parallel_build(self, tex_suffix, latex_cmd, tex_files, n_jobs):
+ """Build PDF files in parallel if possible"""
+ builds = {}
+ build_failed = False
+ max_len = 0
+ has_tex = False
+
+ #
+ # LaTeX PDF error code is almost useless for us:
+ # any warning makes it non-zero. For kernel doc builds it always return
+ # non-zero even when build succeeds. So, let's do the best next thing:
+ # Ignore build errors. At the end, check if all PDF files were built,
+ # printing a summary with the built ones and returning 0 if all of
+ # them were actually built.
+ #
+ with futures.ThreadPoolExecutor(max_workers=n_jobs) as executor:
+ jobs = {}
+
+ for from_dir, pdf_dir, entry in tex_files:
+ name = entry.name
+
+ if not name.endswith(tex_suffix):
+ continue
+
+ name = name[:-len(tex_suffix)]
+
+ max_len = max(max_len, len(name))
+
+ has_tex = True
+
+ future = executor.submit(self.build_pdf_file, latex_cmd,
+ from_dir, entry.path)
+ jobs[future] = (from_dir, pdf_dir, name)
+
+ for future in futures.as_completed(jobs):
+ from_dir, pdf_dir, name = jobs[future]
+
+ pdf_name = name + ".pdf"
+ pdf_from = os.path.join(from_dir, pdf_name)
+
+ try:
+ success = future.result()
+
+ if success and os.path.exists(pdf_from):
+ pdf_to = os.path.join(pdf_dir, pdf_name)
+
+ os.rename(pdf_from, pdf_to)
+ builds[name] = os.path.relpath(pdf_to, self.builddir)
+ else:
+ builds[name] = "FAILED"
+ build_failed = True
+ except futures.Error as e:
+ builds[name] = f"FAILED ({repr(e)})"
+ build_failed = True
+
+ #
+ # Handle case where no .tex files were found
+ #
+ if not has_tex:
+ name = "Sphinx LaTeX builder"
+ max_len = max(max_len, len(name))
+ builds[name] = "FAILED (no .tex file was generated)"
+ build_failed = True
+
+ return builds, build_failed, max_len
+
def handle_pdf(self, output_dirs):
"""
Extra steps for PDF output.
@@ -288,7 +366,9 @@ class SphinxBuilder:
"""
builds = {}
max_len = 0
+ tex_suffix = ".tex"
+ tex_files = []
for from_dir in output_dirs:
pdf_dir = os.path.join(from_dir, "../pdf")
os.makedirs(pdf_dir, exist_ok=True)
@@ -300,55 +380,51 @@ class SphinxBuilder:
latex_cmd.extend(shlex.split(self.latexopts))
- tex_suffix = ".tex"
-
- #
- # Process each .tex file
- #
-
- has_tex = False
- build_failed = False
+ # Get a list of tex files to process
with os.scandir(from_dir) as it:
for entry in it:
- if not entry.name.endswith(tex_suffix):
- continue
+ if entry.name.endswith(tex_suffix):
+ tex_files.append((from_dir, pdf_dir, entry))
- name = entry.name[:-len(tex_suffix)]
- has_tex = True
+ #
+ # When using make, this won't be used, as the number of jobs comes
+ # from POSIX jobserver. So, this covers the case where build comes
+ # from command line. On such case, serialize by default, except if
+ # the user explicitly sets the number of jobs.
+ #
+ n_jobs = 1
- #
- # LaTeX PDF error code is almost useless for us:
- # any warning makes it non-zero. For kernel doc builds it
- # always return non-zero even when build succeeds.
- # So, let's do the best next thing: check if all PDF
- # files were built. If they're, print a summary and
- # return 0 at the end of this function
- #
- try:
- subprocess.run(latex_cmd + [entry.path],
- cwd=from_dir, check=True)
- except subprocess.CalledProcessError:
- pass
+ # n_jobs is either an integer or "auto". Only use it if it is a number
+ if self.n_jobs:
+ try:
+ n_jobs = int(self.n_jobs)
+ except ValueError:
+ pass
- pdf_name = name + ".pdf"
- pdf_from = os.path.join(from_dir, pdf_name)
- pdf_to = os.path.join(pdf_dir, pdf_name)
+ #
+ # When using make, jobserver.claim is the number of jobs that were
+ # used with "-j" and that aren't used by other make targets
+ #
+ with JobserverExec() as jobserver:
+ n_jobs = 1
- if os.path.exists(pdf_from):
- os.rename(pdf_from, pdf_to)
- builds[name] = os.path.relpath(pdf_to, self.builddir)
- else:
- builds[name] = "FAILED"
- build_failed = True
+ #
+ # Handle the case when a parameter is passed via command line,
+ # using it as default, if jobserver doesn't claim anything
+ #
+ if self.n_jobs:
+ try:
+ n_jobs = int(self.n_jobs)
+ except ValueError:
+ pass
- name = entry.name.removesuffix(".tex")
- max_len = max(max_len, len(name))
+ if jobserver.claim:
+ n_jobs = jobserver.claim
- if not has_tex:
- name = os.path.basename(from_dir)
- max_len = max(max_len, len(name))
- builds[name] = "FAILED (no .tex)"
- build_failed = True
+ builds, build_failed, max_len = self.pdf_parallel_build(tex_suffix,
+ latex_cmd,
+ tex_files,
+ n_jobs)
msg = "Summary"
msg += "\n" + "=" * len(msg)
--
2.51.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
end of thread, other threads:[~2025-08-25 16:30 UTC | newest]
Thread overview: 14+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-08-25 16:30 [PATCH v2 00/13] Split sphinx call logic from docs Makefile Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 01/13] scripts/jobserver-exec: move the code to a class Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 02/13] scripts/jobserver-exec: move its class to the lib directory Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 03/13] scripts/jobserver-exec: add a help message Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 04/13] scripts: sphinx-pre-install: move it to tools/docs Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 05/13] tools/docs: sphinx-pre-install: move Python version handling to lib Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 06/13] tools/docs: sphinx-build-wrapper: add a wrapper for sphinx-build Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 07/13] tools/docs: sphinx-build-wrapper: add comments and blank lines Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 08/13] tools/docs: sphinx-build-wrapper: add support to run inside venv Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 09/13] docs: parallel-wrapper.sh: remove script Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 10/13] docs: Makefile: document latex/PDF PAPER= parameter Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 11/13] tools/docs: sphinx-build-wrapper: add an argument for LaTeX interactive mode Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 12/13] tools/docs,scripts: sphinx-*: prevent sphinx-build crashes Mauro Carvalho Chehab
2025-08-25 16:30 ` [PATCH v2 13/13] tools/docs: sphinx-build-wrapper: allow building PDF files in parallel Mauro Carvalho Chehab
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