Directory.Build.target

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" DefaultTargets="Build"
  xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <Target Name="_DevToysLongPathEnabled" BeforeTargets="CoreCompile" Condition="'$([MSBuild]::IsOsPlatform(Windows))' and '$(MSBuildThisFileDirectory.Length)' &gt; 25">
    <!---
      Validation for LongPath support (source https://github.com/dotnet/roslyn/blob/c8eecdb9563127988b3cb564a493eae9ef254a88/eng/build.ps1#L607)
      https://docs.microsoft.com/en-us/archive/blogs/jeremykuhne/net-4-6-2-and-long-paths-on-windows-10#enabling-win32-long-path-support
    -->

    <Warning Condition="'$(registry:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem@LongPathsEnabled)'!='1'" Text="LongPath is not enabled, you may experience build errors. You can avoid these by enabling LongPath. You can enable it by running `tools/enable-long-paths.reg`. More information on https://learn.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation?tabs=powershell#enable-long-paths-in-windows-10-version-1607-and-later"/>
  </Target>
</Project>