MSBuild:如何使用MSBuild计算文件校验和？

Question

如何使用MSBuild计算文件校验和？

我不想依赖MSBuild扩展。

Answer 1

一种选择是在项目文件中使用C#代码。该示例说明如何向C#代码传递参数，以及如何从该代码传递参数。

<?xml version="1.0" encoding="utf-8"?>
<Project>
    <UsingTask TaskName="GenerateHash" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v4.0.dll">
    <ParameterGroup>
      <InputFile ParameterType="System.String" Required="true" />
      <Checksum ParameterType="System.String" Output="true" />
    </ParameterGroup>
    <Task>
      <Using Namespace="System.IO" />
      <Using Namespace="System.Security.Cryptography" />
      <Code Type="Fragment" Language="cs">
        <![CDATA[
              using (var md5 = MD5.Create())
              {                
                  using (var stream = new FileStream(InputFile, FileMode.Open))
                  {
                      byte[] bytes = md5.ComputeHash(stream);  

                      // Convert byte array to a string   
                      StringBuilder builder = new StringBuilder();  
                      for (int i = 0; i < bytes.Length; i++)  
                      {  
                          builder.Append(bytes[i].ToString("x2"));  
                      }  
                      Checksum = builder.ToString();
                  }
              }
          ]]>
      </Code>
    </Task>
  </UsingTask>

  <Target Name="GenerateManifestJson" AfterTargets="PostBuild" >
    <GenerateHash InputFile="$(FileName)">
      <Output
          TaskParameter="Checksum"
          PropertyName="ArtifactChecksum" />
    </GenerateHash>


    <ItemGroup>
      <ManifestJson Include="{" />
      <ManifestJson Include="%20&quot;checksum&quot;:&quot;$(ArtifactChecksum)&quot;" />
      <ManifestJson Include="}" />
    </ItemGroup>

    <WriteLinesToFile File="c:\temp\hello.manifest.json" Lines="@(ManifestJson)" Overwrite="true" Encoding="utf-8" />
  </Target>
</Project>