Open Stack

Hi,

tl;dr: how to progreed in separating horizon and openstack_dashboard

About a year ago now we agreed, it makes sense to separate horizon and
openstack_dashboard.

Thanks to Radomirs work in unbundling JavaScript libraries, we're
finally there.

It was decided to rename horizon to horizon_lib[1], and to rename
openstack_dashboard to horizon.

Now following[2]:

The split:
==========
code freeze -- no patches merged, except for the ones mentioned here,
- rename "horizon" to "horizon_lib", fix all corresponding imports,
- rename "openstack_dashboard" to "horizon", fix all corresponding
  imports,
- clone the "horizon" repository using git-filter to skip the
  dashboard files, create an external repository on github for that,
- add new project to openstack-infra/config called horizon_lib, with
  the new repo as the upstream, setup CI for the new project,
- verify that the new repository works correctly,
- remove the horizon_lib files from the old repository in one big
  commit,

end of code freeze


I tried that in [3], [4]. I renamed openstack_dashboard to
openstack_horizon, rather than horizon to be sure, I really catched all
imports etc., and to make sure, it's clear, what component is meant.
During this process, the name horizon is a bit ambiguous.

It was a somehow larger rework, just search and replace didn't do the
job here, and I'm quite confident to have left one or the other thing
untouched.
There were quite a few additional code changes necessary, mostly due
flake8 tests (renamed names are longer, breaking line length,
horizon_lib and horizon are now separate, imports must be
separated)

So, how do we proceed from here?
- how do we block the gate
- how to create a new repo
- how to set up ci for the new project?
- how to integrate new horizon_lib and horizon (or openstack-horizon) to
devstack

Matthias

[1] http://lists.openstack.org/pipermail/openstack-dev/2014-June/037996.html
[2] https://etherpad.openstack.org/p/horizon-split-plan
[3] https://github.com/mrunge/openstack_horizon
[4] https://github.com/mrunge/horizon_lib