There is so much duplication between the various jobs that it's hard to keep
track of it manually. Let's employ a python script to generate those bits,
reducing the actual gitlab-ci.yml to the hand-written parts only.
The new script takes the .gitlab-ci/gitlab-ci.yml.in and simply appends the
generated parts to it. Most of it is straightforward, only centos needs some
custom parts because of missing doxygen.
The diff is a bit hard to review, thanks to the python script we now group
based on distribution, not based on name (i.e. all fedoras in one group
instead of all container-preps in one group).
And since we're generating anyway, some of the in-between stages were removed
(e.g. $DISTRO-build@template).
A new CI job is added to run a diff against the .gitlab-ci.yml that's checked
in and the one generated by this script. If they differ, we fail.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
