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，我无法弄清楚如何在Msbuild中遍历数组...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处汇集了大量材料。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>

构建演示目标时，结果为

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batching，例如：

<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>

msbuild数组迭代

2 个答案: