[Buildbot-devel] doStepIf function

[Alexander O'Donovan-Jones]

Since people have been talking about this, does anyone know the syntax to query the result of a previous step?
Something like:

def doStepIf(step):
    return step.build.previousStep.getResults()

I'm banging my head trying to work out the correct way to climb the ladder to get this information :S

-----Original Message-----
From: Charles Lepple [mailto:clepple at gmail.com] 
Sent: Monday, May 10, 2010 1:01 PM
To: robert dugal
Cc: buildbot-devel
Subject: Re: [Buildbot-devel] doStepIf function

On May 10, 2010, at 8:33 AM, robert dugal wrote:

> I cannot figure out the syntax for how to use doStepIf with a  
> function so that the step is only executed if certain conditions are  
> true. The condition needs to have some complex testing of builder  
> properties so I want to write this as a function.
> How do I convert something like this below into using a function?
>
>            self.addStep(ShellCommand(
>                 doStepIf=(
>                 (lambda(step):  
> step.build.getProperties().has_key("FOO"))
>                 and
>                 (lambda(step): step.getProperty("FOO") in fooList)
>                 ), command='some command'))

Something like this:

#########

def do_step_test(step):
     return step.build.getProperties().has_key("FOO") and  
step.getProperty("FOO") in fooList

self.addStep(ShellCommand(
     doStepIf = do_step_test,
     command = 'some command')

#########

To make that work with lambda functions, I think you would need to put  
the "and" inside a single lambda expression. The boolean "and" of two  
function definitions won't get you what you want (not to be confused  
with the *results* of two functions, "and"ed together).

http://docs.python.org/tutorial/controlflow.html#lambda-forms

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