Xmlの値を読み取るMSBuildタスクを定義するコード

XmlRead.targets

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <UsingTask TaskName="XmlRead" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v4.0.dll">
    <ParameterGroup>
      <XmlFileName ParameterType="System.String" Required="true" />
      <XPath ParameterType="System.String" Required="true" />
      <Result ParameterType="System.String" Output="true" />
    </ParameterGroup>
    <Task>
      <Reference Include="System" />
      <Reference Include="System.Xml" />
      <Reference Include="System.Xml.Linq" />
      <Using Namespace="System.Collections.Generic" />
      <Using Namespace="System.Xml.Linq" />
      <Using Namespace="System.Xml.XPath" />
      <Code Type="Fragment" Language="cs"><![CDATA[
          var xdoc = XDocument.Load(XmlFileName);
          var nodes = (IEnumerable<object>)xdoc.XPathEvaluate(XPath);
          var result = nodes.First() as XText;
          Result = result.Value;
        ]]></Code>
    </Task>
  </UsingTask>
  <!-- Sample Code
  <Target Name="AfterBuild" Condition="'$(Configuration)' == 'Release'">
    <XmlRead XmlFileName="sample.xml" XPath="/root/sub/content/text()">
      <Output TaskParameter="Result" PropertyName="contentValue" />
    </XmlRead>
    <Message Text="contentValue ::$(contentValue)" Importance="high" />
  </Target>
  -->
</Project>