[Buildbot-devel] avoiding racy svn checkouts against HEAD

[Dave Vitek]

Hi all,

I recently noticed our buildbot setup has a race condition where it can 
check out different revisions of various directories if a user presses 
the "force build" button on the web interface, without specifying a 
revision.

The relevant portion of our configuration looks like so:

     for directory in directories:
         f.addStep(source.SVN( mode='update',
                   baseURL='svn+ssh://svn/svn/%%BRANCH%%/' + directory,
                   workdir='build/' + directory,
                   defaultBranch=branch_path(slave['branch']),
                   haltOnFailure=True))

It can check out different revisions of different modules in 
"directories."  Anyone have any ideas about how to avoid this problem?  
Right now, my best idea is to use a source.SVN step on one module, and 
then roll my own checkout command lines for everything else (using 
ShellCommand).  Better ideas?

- Dave