Hi folks, hope you can help me as it looks to me like this should be a
very simple problem but I've been going round in circles.
I have a target in an included build file to run msbuild on a .csproj
file and it overwrites some of the settings in the proj file if certain
nant properties are set. In particular I want to be able to set the
OutputPath in msbuild only if there is a nant property
'msbuild.outputpath' set. My target is below:
<target name="_msbuild"
project="${msbuild.project}"
description="Build using msbuild">
<msbuild target="${msbuild.target}" >
<property if="${property::exists('msbuild.outputpath')}"
name="OutputPath"
value="${msbuild.outputpath}" />
</msbuild>
</target>
But when I run it with 'msbuild.outputpath' unset I get:
Failed to start MSBuild.
K:\nant\include.build(29,10):
Property evaluation failed.
Expression: ${msbuild.outputpath}
^^^^^^^^^^^^^^^^^^
Property 'msbuild.outputpath' has not been set.
Total time: 0.1 seconds.
But I thought if property::exists evaluates to false (as
msbuild.outputpath is unset) the property task would not be evaluated.
Am I missing something here, is it just not possible to stop nant
processing the value argument of the property task? Is there maybe
another way of achieving this without using an outer if block on the
msbuild tas?
Thanks
Dave
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