Mauro Carvalho Chehab [off-list ref] writes:

As discussed at:
   https://lore.kernel.org/all/20250610101331.62ba466f@foz.lan/ (local)

changeset f061c9f7d058 ("Documentation: Document each netlink family")
added a logic which generates *.rst files inside $(srctree). This is bad
when O=<BUILDDIR> is used.

A recent change renamed the yaml files used by Netlink, revealing a bad
side effect: as "make cleandocs" don't clean the produced files and symbols
appear duplicated for people that don't build the kernel from scratch.

This series adds an yaml parser extension and uses an index file with glob for
*. We opted to write such extension in a way that no actual yaml conversion
code is inside it. This makes it flexible enough to handle other types of yaml
files in the future. The actual yaml conversion logic were placed at 
netlink_yml_parser.py. 

As requested by YNL maintainers, this version has netlink_yml_parser.py
inside tools/net/ynl/pyynl/ directory. I don't like mixing libraries with
binaries, nor to have Python libraries spread all over the Kernel. IMO,
the best is to put all of them on a common place (scripts/lib, python/lib,
lib/python, ...) but, as this can be solved later, for now let's keep it this
way.

---

Note that the series leaves the YNL build broken.

make -C tools/net/ynl/
make: Entering directory '/home/donaldh/net-next/tools/net/ynl'
make[1]: Entering directory '/home/donaldh/net-next/tools/net/ynl/lib'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/home/donaldh/net-next/tools/net/ynl/lib'
make[1]: Entering directory '/home/donaldh/net-next/tools/net/ynl/generated'
	GEN_RST conntrack.rst
Traceback (most recent call last):
  File "/home/donaldh/net-next/tools/net/ynl/generated/../pyynl/ynl_gen_rst.py", line 90, in <module>
    main()
    ~~~~^^
  File "/home/donaldh/net-next/tools/net/ynl/generated/../pyynl/ynl_gen_rst.py", line 86, in main
    write_to_rstfile(content, args.output)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^
  File "/home/donaldh/net-next/tools/net/ynl/generated/../pyynl/ynl_gen_rst.py", line 64, in write_to_rstfile
    os.makedirs(directory, exist_ok=True)
    ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen os>", line 227, in makedirs
FileNotFoundError: [Errno 2] No such file or directory: ''
make[1]: *** [Makefile:56: conntrack.rst] Error 1
make[1]: Leaving directory '/home/donaldh/net-next/tools/net/ynl/generated'
make: *** [Makefile:25: generated] Error 2
make: Leaving directory '/home/donaldh/net-next/tools/net/ynl'