[Buildbot-devel] WithProperties question

[Amber Yust]

WithProperties is a wrapper that is not designed to be evaluated until
build-time. It doesn't act like a string in buildsteps; the command= arg et
cetera are just smart enough to go through and handle WithProperties
correctly.

If you want to concatenate strings at import or run-time (rather than
build-time), you need to do it before adding the WithProperties wrapper.

~Amber

On Wed, May 25, 2011 at 12:46 PM, Matthew Morse <matt at apple.com> wrote:

> Hi,
>
> I clearly don't understand something fundamental about WithProperties, but
> I haven't been able to find an answer in the doc. Here's the issue:
>
> When I used WithProperties within the context of a build step or shell
> command, it does what I'd expect, for example:
>
>
>
> -----------------------------------------------------------------------------------------------------------------
>
> output_library_dir_buildstamp = WithProperties("%s-%d", "buildername",
> "buildnumber")
>
>
> set_library_name = shell.ShellCommand(
>         description = "Renaming library",
>         descriptionDone=["Finished","renaming library"],
>         command = ["mv", "library", output_library_dir_buildstamp],
>         workdir = output_library_dir,
>         haltOnFailure=True,
>    )
>
>
> ---> I get an output name of the form "someBuilderName-num".
>
> -----------------------------------------------------------------------------------------------------------------
>
> But, if I want to take the value of 'output_library_dir_buildstamp' and
> concat some string (in this case, for the tar file name), I get an error:
>
> output_library_dir_buildstamp = WithProperties("%s-%d", "buildername",
> "buildnumber")
> tar_file_name = output_library_dir_buildstamp + ".tar"
>
> --> TypeError: unsupported operand type(s) for +: 'instance' and 'str'
>
>
> Why does the return value of WithProperties act like a string in the
> ShellCommand, but can't be used as such elsewhere?
>
> And, how do I convert it to a string for concatenation, etc. when it isn't
> used within a build step?
>
> Thanks,
> -- Matt
>
>
>
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