setup.py --help-commands fails in env without testrepository

[Akihiro Motoki]

In an environment where testrepository is not installed, python setup.py --help-commands fails due to import error of testrepository.

Does pbr require testrepository?

Horizon does not uses testrepository. The following is an example.

- clone horizon
- cd horizon
- virtualenv testenv
- source testenv/bin/activate
- pip install -e .
- python setup.py --help-commands

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/124652

[Oleg Gashev (oleg-f)]

https://review.openstack.org/159901

[Wes Turner (wes-turner)]

Instead of installing testrepository everywhere,
this wraps ImportError in testr_command.py:

```python
try:
    from testrepository import commands
except ImportError as e:
    class commands(object):
        def __getattribute__(self, key):
            raise e
```

I haven't run the tests. This ImportError is causing other setup.py commands to fail.

Please, either:

* [(0)] add the testrepository dependency
* [(1)] delay the Import
* [(1)] wrap the ImportError

[Wes Turner (wes-turner)]

"other setup.py commands":

"python setup.py --help-commands" fails, for all packages, without one of the above (or a different) solutions.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/124652
Committed: https://git.openstack.org/cgit/openstack-dev/pbr/commit/?id=946cf80b750f3735a5d3b0c2173f4eaa7fad4a81
Submitter: Jenkins
Branch: master

commit 946cf80b750f3735a5d3b0c2173f4eaa7fad4a81
Author: Akihiro Motoki <email address hidden>
Date: Mon Sep 29 07:36:19 2014 +0900

    Make setup.py --help-commands work without testrepository

    testr command is registered by pbr.hooks.commands if
    testrepository is installed, so there is no need to
    setup the entry point in setup.cfg.

    Change-Id: I95aae12d1ac810b6d1d09b71f2a0d87be5ccb6ab
    Closes-Bug: #1375048

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/kilo
Review: https://review.openstack.org/263928

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/263928
Committed: https://git.openstack.org/cgit/openstack-dev/pbr/commit/?id=6e472b4905411a39e993c81c382a27ca9c771ef5
Submitter: Jenkins
Branch: stable/kilo

commit 6e472b4905411a39e993c81c382a27ca9c771ef5
Author: Akihiro Motoki <email address hidden>
Date: Mon Sep 29 07:36:19 2014 +0900

    Make setup.py --help-commands work without testrepository

    testr command is registered by pbr.hooks.commands if
    testrepository is installed, so there is no need to
    setup the entry point in setup.cfg.

    (cherry-picked from 946cf80b750f3735a5d3b0c2173f4eaa7fad4a81)

    Change-Id: I95aae12d1ac810b6d1d09b71f2a0d87be5ccb6ab
    Closes-Bug: #1375048

[Doug Hellmann (doug-hellmann)]

This issue was fixed in the openstack-dev/pbr 0.11.1 release.