the pinning of horizon using a path in trove-dashboard and manila-ui test-requirements.txt conflicts with other projects

[Amrith Kumar]

Currently, we have the following in test-requirements.txt for trove-dashboard

-e git://github.com/openstack/horizon.git#egg=horizon

If other projects cause horizon to be installed (such as because their plugins are enabled), devstack will crap out.

I find this when running trove-integration's redstack install when I enable manila and since it's plugin also chooses to get horizon. and it's test-requirements.txt is similarly:

-e git://github.com/openstack/horizon.git#egg=horizon

[Valeriy Ponomaryov (vponomaryov)]

manila-ui does not install test-requirements.txt deps in devstack after following fix: https://github.com/openstack/manila/commit/d495ea535ef921d1257811fdd7b482b73edb8a07

So, I recommend to do the same for trove. UI "test" deps shoudl not be installed by Devstack in host system.

[Duk Loi (duktesora)]

So it appears that sahara-dashboard solves this issue by not having the git clone of horizon in the test-requirements and calling the equivalent git clone in a separate script that is invoked by a reference in tox.ini.

The install of horizon script in sahara-dashboard/tools/pip_install.sh has a great explanation of the solution. We should "borrow" the solution from Sahara which derived it from Neutron.