Directory.Build.targets

<Project>
  <PropertyGroup>
    <_IsFunctionsSdkBuild Condition="$(_FunctionsTaskFramework) != ''">true</_IsFunctionsSdkBuild>
    <_FunctionsExtensionsDir>$(TargetDir)</_FunctionsExtensionsDir>
    <_FunctionsExtensionsDir Condition="$(_IsFunctionsSdkBuild) == 'true'">$(_FunctionsExtensionsDir)bin</_FunctionsExtensionsDir>
  </PropertyGroup>

  <Target Name="CopyExtensionsJson" AfterTargets="_GenerateFunctionsAndCopyContentFiles">
    <Message Importance="High" Text="Overwritting extensions.json file with one from build." />

    <Copy Condition="$(_IsFunctionsSdkBuild) == 'true' AND Exists('$(_FunctionsExtensionsDir)\extensions.json')"
          SourceFiles="$(_FunctionsExtensionsDir)\extensions.json"
          DestinationFiles="$(PublishDir)bin\extensions.json"
          OverwriteReadOnlyFiles="true"
          ContinueOnError="true"/>
  </Target>
</Project>