[Buildbot-devel] Serial numbering of builds

A.T.Hofkamp a.t.hofkamp at tue.nl
Thu May 18 07:18:59 UTC 2006

John Pye wrote:
> I would like to get some kind of build numbering based on the revision
> number in the repository. Can Buildbot tell me what is the current
> revision number from SVN (step.SVN), so that I can pass it into my build
> script (step.Compile)? How would I do that?

Currently, no afaik.
In a next version there will be script variables to pass such information as 
argument to the steps.

If you run your build in a working copy, you could ask svn for the repo number 
and use that (quite trivial using pysvn). Otherwise, add an extra step that 
finds the repo number and writes the information in a file to be used later.

At the moment I do the latter.
It works quite nicely. The biggest disadvantage is the enormous amount of 
build versions that you get, so almost immediately one needs an automagic 
policy to delete non-interesting build results.
Maybe this is an area that buildbot should cover in the future?

A few weeks back I found that using repo numbers only for builds only works 
when all builds are done at the same place in the repo (ie the trunk).

When having two different versions of the same software at the same time (one 
at a branch and one at trunk), the repo number is not enough to differentiate 
between the two.

I am still puzzling how to deal with this problem.

Obviously I need some additional version information but I'd like to have a 
scheme that can handle any order of releasing and branching (in the ideal case 
even nested branching).
I would expect that somebody at this planet has already found a nice way of 
dealing with this problem, but I haven't found it yet.


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