msbuild数组迭代

Question

<ItemGroup>
    <!-- Unit Test Projects-->
    <MyGroup Include="Hello.xml" />
    <MyGroup Include="GoodBye.xml" />     
</ItemGroup>

如何创建迭代此列表并执行某项操作的任务？

<XmlPeek XmlInputPath="%(MyGroup.Identity)"
         Query="/results">
    <Output TaskParameter="Result"
            ItemName="myResult" />
</XmlPeek>

如果myresult里面有某个文本,我想发一条错误信息.然而,对于我的生活,我无法弄清楚如何迭代Msbuild中的数组...任何人都知道如何实现这一目标？

Answer 1

您需要使用批处理.批处理将基于元数据键迭代一组项目.我在http://sedotech.com/Resources#batching上汇总了大量资料.例如,看看这个简单的MSBuild文件.

<Project DefaultTargets="Demo" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

  <ItemGroup>
    <Files Include="one.txt"/>
    <Files Include="two.txt"/>
    <Files Include="three.txt"/>
    <Files Include="four.txt"/>
  </ItemGroup>

  <Target Name="Demo">
    <Message Text="Not batched: @(Files->'%(Identity)')"/>

    <Message Text="========================================"/>

    <Message Text="Batched: %(Files.Identity)"/>
  </Target>

</Project>

在构建Demo目标时,结果是

Not batched: one.txt;two.txt;three.txt;four.txt
========================================
Batched: one.txt
Batched: two.txt
Batched: three.txt
Batched: four.txt

批处理始终使用语法%(Xyz.Abc).仔细查看这些链接,了解有关批处理的更多信息,然后您就会想知道.

Answer 2

您可以在内部目标上使用批处理,如下所示:

<ItemGroup>
  <!-- Unit Test Projects-->
  <MyGroup Include="Hello.xml" />
  <MyGroup Include="GoodBye.xml" />     
</ItemGroup>

<Target Name="CheckAllXmlFile">
  <!-- Call CheckOneXmlFile foreach file in MyGroup -->
  <MSBuild Projects="$(MSBuildProjectFile)"
           Properties="CurrentXmlFile=%(MyGroup.Identity)"
           Targets="CheckOneXmlFile">
  </MSBuild>
</Target>

<!-- This target checks the current analyzed file $(CurrentXmlFile) -->
<Target Name="CheckOneXmlFile">
  <XmlPeek XmlInputPath="$(CurrentXmlFile)"
           Query="/results/text()">
    <Output TaskParameter="Result" ItemName="myResult" />
  </XmlPeek>

  <!-- Throw an error message if Result has a certain text : ERROR -->
  <Error Condition="'$(Result)' == 'ERROR'"
         Text="Error with results $(Result)"/> 
</Target>