Documentation: Add ABI to the admin guide

That's the third attempt to add support for the Kernel ABI at the Documentation's admin guide.

The first approach was based on a generic extension that calls a random script. This one is based on a new Sphinx extension with adds a symbol specific for parsing ABI symbols.

It adds a new script (scripts/get_abi.pl) with can either search for ABI symbols that match a regular expression or outputs the entire documentation found inside a directory as a ReST book.

Adding the ABI description to the Linux documentation is as easy as adding a tab like:

.. kernel-abi:: $srctree/Documentation/ABI/obsolete

On version 3, I improved the script to better parse the ABI descriptions. On this version, it will identify if the description can be handled as a normal text. If so, it will escape characters that has special meaning on Sphinx. If it detects that the description syntax is too complex, it outputs inside a literal block.

Also on version 3, I opted to use 4 separate sections, one for each type of symbol. It also add an entry with the name of each ABI file, with has cross-references to the symbols defined on each file.

The parser was also improved to handle any content at the files that are before the ABI tags.

The first 3 patches on this series fix some syntax errors on some ABI description.

The next one makes sure that, when a table is present on the description, the preceding line will end with a colon (with is one of the ways the script uses to identify complex layouts).

-

IMHO, we should add another ABI tag to allow using an enriched text description, e. g. instead of:

Description: foo

One could use, instead, something like:

ReST-description: foo

On such case, the script wouldn't need to escape the description contents, as they can be just sent directly to the ABI ReST output.

Markus Heiser (1):
doc-rst: customize RTD theme; literal-block

Mauro Carvalho Chehab (10):
ABI: fix some syntax issues at the ABI database
ABI: sysfs-driver-hid: the "What" field doesn't parse fine
ABI: sysfs-class-uwb_rc: remove a duplicated incomplete entry
ABI: better identificate tables
scripts: add an script to parse the ABI files scripts/get_abi.pl: parse files with text at beginning scripts/get_abi.pl: avoid use literal blocks when not needed scripts/get_abi.pl: split label naming from xref logic scripts/get_abi.pl: add support for searching for ABI symbols
doc-rst: add ABI documentation to the admin-guide book

 .../ABI/obsolete/sysfs-driver-hid-roccat-pyra      |   2 +-
 Documentation/ABI/testing/pstore                   |   2 +-
 .../testing/sysfs-bus-event_source-devices-format  |   2 +-
 .../ABI/testing/sysfs-bus-i2c-devices-hm6352       |   6 +-
 .../ABI/testing/sysfs-bus-iio-distance-srf08       |   4 +-
 .../ABI/testing/sysfs-bus-iio-proximity-as3935     |   4 +-
 .../ABI/testing/sysfs-bus-pci-devices-cciss        |  22 +-
 .../ABI/testing/sysfs-bus-usb-devices-usbsevseg    |  12 +-
 .../testing/sysfs-class-backlight-driver-lm3533    |   6 +-
 Documentation/ABI/testing/sysfs-class-cxl          |   6 +-
 Documentation/ABI/testing/sysfs-class-devfreq      |   2 +-
 .../ABI/testing/sysfs-class-led-driver-lm3533      |   8 +-
 Documentation/ABI/testing/sysfs-class-leds-gt683r  |   4 +-
 Documentation/ABI/testing/sysfs-class-powercap     |   2 +-
 Documentation/ABI/testing/sysfs-class-uwb_rc       |   6 -
 Documentation/ABI/testing/sysfs-driver-hid         |  12 +-
 .../ABI/testing/sysfs-driver-hid-roccat-kone       |   2 +-
 Documentation/ABI/testing/sysfs-kernel-fscaps      |   2 +-
 Documentation/ABI/testing/sysfs-kernel-vmcoreinfo  |   2 +-
 Documentation/admin-guide/abi-obsolete.rst         |  10 +
 Documentation/admin-guide/abi-removed.rst          |   4 +
 Documentation/admin-guide/abi-stable.rst           |  13 +
 Documentation/admin-guide/abi-testing.rst          |  19 +
 Documentation/admin-guide/abi.rst                  |  11 +
 Documentation/admin-guide/index.rst                |   1 +
 Documentation/conf.py                              |   3 +-
 Documentation/sphinx-static/theme_overrides.css    |   7 +
 Documentation/sphinx/kernel_abi.py                 | 155 ++++++++
 scripts/get_abi.pl                                 | 419 +++++++++++++++++++++
 29 files changed, 691 insertions(+), 57 deletions(-)
 create mode 100644 Documentation/admin-guide/abi-obsolete.rst
 create mode 100644 Documentation/admin-guide/abi-removed.rst
 create mode 100644 Documentation/admin-guide/abi-stable.rst
 create mode 100644 Documentation/admin-guide/abi-testing.rst
 create mode 100644 Documentation/admin-guide/abi.rst
 create mode 100644 Documentation/sphinx/kernel_abi.py
 create mode 100755 scripts/get_abi.pl

2.9.3