GitLab

Unbreaks the autotools build and fixes #15.

Required to make gst-indent linter on CI happy.

This commit adds a .gitlab-ci.yml file, which uses a feature
to fetch the config from a centralized repository. The intent is
to have all the gstreamer modules use the same configuration.

The configuration is currently hosted at the gst-ci repository
under the gitlab/ci_template.yml path.

Part of gstreamer/gstreamer-project#29

Instead, for python2 revert to manipulating gi.overrides.__path__

Instead of fiddling with sys.path, we instead use a custom
sys.meta_path importer

This patch makes the tests pass running uninstalled and installed, with
python2 and python3 on linux, windows and osx.

The main gist is to use the new python-module to do the lifting done
by pythondetector, and with that add support for python2 and windows.

They were not installed, and were simply used for our
uninstalled setup, which we now implement differently.

PyMapping_GetItemString’ discards ‘const’ qualifier from pointer target type

https://bugzilla.gnome.org/show_bug.cgi?id=796093

https://bugzilla.gnome.org/show_bug.cgi?id=795555

If someone wants to put the overrides in a non-standard location,
they can use the --with-pygi-overrides-dir option.

The default is to put them in ${pyexecdir}/gi/overrides

Fixes make distcheck

https://bugzilla.gnome.org/show_bug.cgi?id=793756

https://bugzilla.gnome.org/show_bug.cgi?id=793560

It doesn't exist anymore there

It can have been initialized by some C code (in a C app with plugins
for example).

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=788088

We need a 64 bit integer, and previously the test failed because it was
already created from longs in various cases (e.g. when reading from a
GstStructure).

Also rename misleading parameter (*kwargs -> *args)

https://bugzilla.gnome.org/show_bug.cgi?id=793493