Precise: buildbot create-master fails because sqlalchemy is not installed

[Gary Poster]

On Precise, the buildbot create-master command fails because sqlalchemy is not installed. I have not yet investigated whether simply getting sqlalchemy fixes it, but adding it as a dependency is an obvious first step. I'm happy to help debug if desired.

[Gary Poster (gary)]

After you install sqlalchemy, you get another error:

$ sudo buildbot create-master /var/lib/buildbot/masters/example
updating existing installation
chdir /var/lib/buildbot/masters/example
buildbot.tac already exists and is correct
master.cfg.sample already exists and is up-to-date
public_html/ already exists: not replacing
Makefile.sample already exists and is correct
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 287, in addCallbacks
    self._runCallbacks()
  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 545, in _runCallbacks
    current.result = callback(current.result, *args, **kw)
  File "/usr/lib/python2.7/dist-packages/twisted/internet/base.py", line 426, in _continueFiring
    callable(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/buildbot/scripts/runner.py", line 36, in async
    d = defer.maybeDeferred(f, *args, **kwargs)
--- <exception caught here> ---
  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 134, in maybeDeferred
    result = f(*args, **kw)
  File "/usr/lib/python2.7/dist-packages/buildbot/scripts/runner.py", line 626, in createMaster
    d = m.create_db()
  File "/usr/lib/python2.7/dist-packages/buildbot/scripts/runner.py", line 300, in create_db
    from buildbot.db import connector
  File "/usr/lib/python2.7/dist-packages/buildbot/db/connector.py", line 20, in <module>
    from buildbot.db import pool, model, changes, schedulers, sourcestamps
  File "/usr/lib/python2.7/dist-packages/buildbot/db/model.py", line 17, in <module>
    import migrate
exceptions.ImportError: No module named migrate

There is a /usr/lib/python2.7/dist-packages/buildbot/db/migrate directory but it does not have any python files in it, let alone a __init__.py file. The versions directory within it does. I'm not sure what is intended.

[Gary Poster (gary)]

I raised this with the buildbot-devel list. Hopefully we can get some help.

http://sourceforge.net/mailarchive/forum.php?thread_name=4F26F4F4.8010901%40canonical.com&forum_name=buildbot-devel

[Gary Poster (gary)]

The answer is that buildbot 0.8.5 depends on both python-sqlalchemy and python-migrate. When I installed both of these, everything seemed to work fine. Thank you to Dustin Mitchell for the speedy reply.

[Matthias Klose (doko)]

fixed in 0.8.2-2