openstack/swift - swift - OpenDev: Free Software Needs Free Tools

Change-Id: I0128123c61eeabeca609b049746ffce1ce76a978

... because explicit language=None causes the below warning since
Sphinx 5.0.0.
Invalid configuration value found: 'language = None'. Update your
configuration to a valid language code. Falling back to 'en' (English).
Change-Id: I052dc77c4d7f4304cc163864dd000beccf708a2a

Switch to openstackdocstheme 2.2.1 and reno 3.1.0 versions. Using
these versions will allow especially:
* Linking from HTML to PDF document
* Allow parallel building of documents
* Fix some rendering problems
Update Sphinx version as well.
Disable openstackdocs_auto_name to use 'project' variable as name.
Set openstackdocs_pdf_link to link to PDF file. Note that
the link to the published document only works on docs.openstack.org
where the PDF file is placed in the top-level html directory. The
site-preview places the PDF in a pdf directory.
Change pygments_style to 'native' since old theme version always used
'native' and the theme now respects the setting and using 'sphinx' can
lead to some strange rendering.
Remove docs requirements from lower-constraints, they are not needed
during install or test but only for docs building.
openstackdocstheme renames some variables, so follow the renames
before the next release removes them. A couple of variables are also
not needed anymore, remove them.
See also
http://lists.openstack.org/pipermail/openstack-discuss/2020-May/014971.html
Change-Id: I131850d2a5c6164dfd48c9c95885d4754b5236c6

The repo is Python using both Python 2 and 3 now, so update hacking to
version 2.0 which supports Python 2 and 3. Note that latest hacking
release 3.0 only supports version 3.
Fix problems found.
Remove hacking and friends from lower-constraints, they are not needed
for installation.
Change-Id: I9bd913ee1b32ba1566c420973723296766d1812f

Release notes are version independent, so remove version/release
values. We've found that projects now require the service package
to be installed in order to build release notes, and this is entirely
due to the current convention of pulling in the version information.
Release notes should not need installation in order to build, so this
unnecessary version setting needs to be removed.
This is needed for new release notes publishing, see
I56909152975f731a9d2c21b2825b972195e48ee8 and the discussion starting
at
http://lists.openstack.org/pipermail/openstack-dev/2017-November/124480.html
.
Change-Id: I1442656b3e4ab84ee5c219f5f4959bd7f41f01fe

As part of the docs migration work[0] for Pike we need to switch to use
the openstackdocstheme.
Fix one display problem with wrong section markup in the index file.
[0]https://review.openstack.org/#/c/472275/
Change-Id: Ide31218a7f37ba5d959de99cab48fc6513bf426f

Add the Apache License 2.0 description in ../conf.py which
is necessary.
Change-Id: Ief3767fdc22f582beb8683a9075dc25dbcb541cd

This should give the necessary tooling to set up the right
links in the right places so Swift has release notes listed
alongside other projects.
Change-Id: I4e5f1ce1fcfbb2943036c821a24a0b4a3a2d9fc8