Is there an MSBuild variable to add a triplet overlay path like VCPK_OVERLAY_TRIPLETS?

[meastp]

I have looked in the documentation, but couldn't find an MSBuild variable/property to add a triplet overlay path.

Does this exist? If not, this is a feature request... :)

In combination with the manifests feature it would be useful to keep custom triplets in the project source repo, and not have to modify global environment variables like VCPKG_OVERLAY_TRIPLETS but instead keep the configuration in an MSBuild .props file.

  <!-- Custom project triplets for vcpkg -->
  <PropertyGroup>
    <VcpkgTriplet Condition="'$(Platform)'=='Win32'">x86-windows-$(PlatformToolset)</VcpkgTriplet>
    <VcpkgTriplet Condition="'$(Platform)'=='x64'">x64-windows-$(PlatformToolset)</VcpkgTriplet>
    <VcpkgOverlayTriplets>$(MSBuildThisFileDirectory)/custom_triplets</VcpkgOverlayTriplets>
  </PropertyGroup>

example folder structure in project root:

src
vcpkg_installed
custom_triplets // contains triplet files
vcpkg.json
project.vcxproj

Building in Visual Studio would then work automatically with MSBuild.

[meastp]

I solved this using

<VcpkgAdditionalInstallOptions>--overlay-triplets=$(VcpkgManifestRoot)\triplets $(VcpkgAdditionalInstallOptions)</VcpkgAdditionalInstallOptions>

So there is no urgent need for a specialized property for this.

[JackBoosY]

Please keep this issue open until we fix it by adding a feature.