Tox exhausting /tmp partition

[Jamie Lennox]

So every time i tried to run tox i was getting the error message that /tmp was out of space when trying to create the virtual env which means that creating the virtualenv was filling a 3gb partition.

In our tox requirements we currently have:

deps = -r{toxinidir}/requirements.txt
       -r{toxinidir}/test-requirements.txt
       .[ldap]
       .[memcache]
       .[mongodb]

By having each of those additional dependencies listed as .[XXX] tox is installing . (the keystone working directory) into a virtualenv then determining the entry point. This created 3 seperate /tmp/pip-XXX-build directories. The other side of this is that my keystone/.testrepository folder is now 994M so when tox copied this to tmp 3 times and then tried to install all the dependencies it doesn't leave much space.

There are two fixes to this:
1. reset my .testrepository database
2. dependencies should be listed together like .[XXX,YYY,ZZZ] so . is only copied once

As an addition to this because we are installing dependencies with .[XXX] which means install . (working directory/keystone) + XXX dependencies there is no reason to specifically install -r requirements.txt as this will be handled for us.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/218693

[Dolph Mathews (dolph)]

Henry Nash and I ran into this as well; I didn't realize it was a problem in Keystone itself! Nice work.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/218693
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=766f051856405f4fd86893c0afa771a25c1ccec3
Submitter: Jenkins
Branch: master

commit 766f051856405f4fd86893c0afa771a25c1ccec3
Author: Jamie Lennox <email address hidden>
Date: Mon Aug 31 10:41:11 2015 +1000

    Group tox optional dependencies

    Group the additional dependencies for tox. The way they are specified
    now means that the working directory is copied into /tmp 3 times, one
    for each . which can cause space issues.

    Also removes specifically installing requirements.txt as this will be
    handled for the dependencies of .

    Change-Id: Ia2c86c70f059c6352586221e13857e5bd17ae37c
    Closes-Bug: #1490354