[Buildbot-devel] Accessing other Build's properties from a BuildStep

[Daniel Rus Morales]

On Tue, May 28, 2013, at 02:02 AM, Brian Lalor wrote:
> On May 27, 2013, at 11:54 AM, Daniel Rus Morales <danirus at eml.cc> wrote:
> 
> > I've written a kind of tutorial on how to configure Buildbot to build projects 
> > with dependencies on each other. The case I draw builds a Django web app and a 
> > Django web project that depends on the app. It uses Triggerable schedulers and 
> > Trigger build steps.
> 
> This looks like a great tutorial if you know what your dependencies are
> ahead of time, but for my use case I don't.  I want to be able to
> dynamically trigger downstream builds when a build is depended upon by
> another project, and I want to track the dependencies dynamically.  I
> think I want to have a builder set properties indicating the artifact
> that it creates and the artifacts it depends on.  I think I know how to
> go about doing this (the properties are pretty straightforward), but I
> don't know how to access other builders and their builds from a build
> step.

I don't quite get the scenario. Could you elaborate more? 
What's your starting point and what's the flow you have in mind?

With properties you can go quite far
(http://docs.buildbot.net/current/manual/cfg-buildsteps.html#setproperty).
You could use a function to look into the property and associate the
function with the argument doStepIf of your BuildStep.