[Twisted-Python] Where is buildslave configuration?

[exarkun at twistedmatrix.com]

On 01:59 pm, techtonik at gmail.com wrote:
>On Mon, Apr 4, 2011 at 4:15 PM, Andrew Bennetts <andrew at bemusement.org> 
>wrote:
>>
>>So your problem isn't the version string, but that running bin/trial 
>>in
>>your Twisted checkout is finding the wrong version of Twisted?
>
>Exactly. But wrong version string was the cause of troubles with 
>debugging it.
>>Also, rather than editing random library files, why not just look at 
>>the
>>output of python -v bin/trial?
>
>I forgot about it, so I've just used python bin/trial --version
>..and it showed me the version..
>..it was 11.0.0..
>..but 11.0.0 is the released version I've installed..
>..and the version in the trunk/ (i.e. my working copy)..
>..so I decided to modify these versions to differentiate copies 
>somehow..
>..because it was 1 minute fix..
>..because I forgot about python -v bin/trial..
>..which is 1 second test..
>..so I've looked up where the script reads version..
>..and it appeared that it imports copyright.py..
>..which in turn imports version from _version.py..
>..so I've modified _version.py in my working copy..
>..and got the same 11.0.0 version in bin/trial --version...
>.."AHA!", - said I to myself..
>..but decided to check ..
>.."just in case"..
>..because I like to be sure..
>..and because you never know who listens to your trac.core.Component..
>..or zope.interface..
>..or whatever..
>..unless you run it..
>..so, I've modified _version.py in my installation..
>..and..
>..guess that?..
>..still got the 11.0.0..
>..$%#!, - said I to myself..
>..[$%#!] * 3, - said I to myself three minutes later..
>..or five..
>..or more..
>..I don't remember..
>..but if took less than three minutes, I wouldn't be writing this 
>letter..
>..so..
>..I compared source trees..
>..and found..
>..that there is an extra version assignment..
>..at the end of copyright.py
>
>So, I wasted some more time (I won't tell how much) to find where is
>this funny piece of code in release toolchain that inserts this
>version string? After looking at some note that .msi is downloaded
>from buildbot, I though "No, that's impossible", but, alas, it was
>there. Not even open sourced as it appears.
>
>So, now I am curious why this copyright.py patch is required?

It's required because of restrictions on what version you are allowed to 
use when building an MSI.  These rules are codified in 
distutils.version.StrictVersion:

    >>> from distutils.version import StrictVersion
    >>> from twisted import __version__
    >>> StrictVersion(__version__)
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "/usr/lib/python2.6/distutils/version.py", line 40, in 
__init__
        self.parse(vstring)
      File "/usr/lib/python2.6/distutils/version.py", line 107, in parse
        raise ValueError, "invalid version number '%s'" % vstring
    ValueError: invalid version number '11.0.0+r31541'
    >>> StrictVersion('11.0.0pre1')
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "/usr/lib/python2.6/distutils/version.py", line 40, in 
__init__
        self.parse(vstring)
      File "/usr/lib/python2.6/distutils/version.py", line 107, in parse
        raise ValueError, "invalid version number '%s'" % vstring
    ValueError: invalid version number '11.0.0pre1'

The build step is there to ensure the version is something bdist_msi 
will accept.  It's an unintentional side-effect that the change survives 
all the way through to the built page.
>My ultimate goal is to run a complete build of Twisted will all tests
>that results in .msi installer on my Vista machine - the machine with
>operating system that was in the list of NeededBuildSlaves 30 minutes
>ago. =)

Coincidentally, I noticed that page was somewhat outdated and updated 
it.  If someone would *like* to contribute Vista slaves, that's 
completely fine, but I think the Twisted project will be happy enough if 
we have to skip over Vista and just pay attention to Windows 7.

Jean-Paul