[Buildbot-devel] doStepIf function

Greg Ward greg at gerg.ca
Thu May 13 17:51:18 UTC 2010

On Mon, May 10, 2010 at 8:33 AM, robert dugal <rmdugal at hotmail.com> 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'))

Charles Lepple's answer is what you want.  Here's what you actually did:

  func1 = lambda step: step.build.getProperties().has_key("FOO")
  func2 = lambda step: lambda(step): step.getProperty("FOO") in fooList)
  func = func1 and func2

Since func1 and func2 are both true values, "func1 and func2"
evaluates to func1.  So your func2 is unused.

You *can* do this in a single lambda, but you really don't want to.
Charles' suggestion is the way to go.


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