Add two patches improving python_version logic, adding two extra
optional arguments: show_alternatives and bail_out.

The third patch changes the build behavior in a way that distros
shipped with Python 3.6 like openSUSE Leap, RHEL8 and others will
break.

Personally, I'm against such patch, but based on some discussions at:

    https://lore.kernel.org/linux-doc/n4qixsp23dccgz6mtrmd2xumcngtphkbywjnxkrqpnuf2dbu2p@2sj44sbyga4j/T/#t

Several developers voiced that the best is to break the build.
So, I'll let up to the docs maintainer to decide weather or not
apply the final patch or replace by something that would avoid
such breakage.

This series is on top of the sphinx-build-wrapper patch:
    https://lore.kernel.org/linux-doc/cover.1756740314.git.mchehab+huawei@kernel.org/

---

v2:
- I forgot to merge some hunks at the last patch;
- I ended modifying the logic: it now provides a hint at the broken
  distros, showing how to call sphinx-build-wrapper directly to
  override the python3 version.

Mauro Carvalho Chehab (3):
  tools/docs: python_version.py: drop a debug print
  tools/docs: python_version: allow check for alternatives and bail out
  tools/docs: sphinx-* break documentation bulds on openSUSE

 tools/docs/lib/python_version.py | 45 +++++++++++++++++++++++++-------
 tools/docs/sphinx-build-wrapper  |  3 ++-
 tools/docs/sphinx-pre-install    |  3 ++-
 3 files changed, 39 insertions(+), 12 deletions(-)

-- 
2.51.0