Move common build code from _build_helpers (#55986)

We have some common code used by several docs scripts.  Migrate that
into the build-only shared code repository.

* Move lib/ansible/utils/_build_helpers.py to the directory for common
  build code
* Migrate docs/bin/dump_config.py to a build-ansible subcommand
* Migrate dump_keywords to the build-ansible framework
  * Make the script more maintainable by using functions and good
    variable names
  * Port to Python3 idioms
  * Fix bug so that private attributes will be undocumented
* Move generate_man to a build-ansible subcommand
* Port plugin_formatter to a build-ansible subcommand
* Rework command_plugins so that docs scripts can target Python-3.4+ and
  releng-only subcommands can use more recent versions of Python.
  The architecture is now that command_plugins/* need to be importable
  on Python-3.4.  The init_parsers() method needs to run on Python-3.4.
  But the main() method can utilize features of more recent Python as
  long as it fits within those parameters.
* Update docs build requirements

Port the plugin_formatter to build-ansible framework

1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index e004d8d1a0f..f5df989f6e0 100644
--- a/Makefile
+++ b/Makefile
@@ -33,7 +33,7 @@ ASCII2MAN = @echo "ERROR: rst2man from docutils command is not installed but is
 endif
 
 PYTHON=python
-GENERATE_CLI = $(PYTHON) docs/bin/generate_man.py
+GENERATE_CLI = hacking/build-ansible.py generate-man
 
 SITELIB = $(shell $(PYTHON) -c "from distutils.sysconfig import get_python_lib; print get_python_lib()")