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bpo-39930: Fix MSBuild detection for Build Tools (GH-18938)
Ensure we detect Build Tools installs using the newer logic, and skip looking in the registry for VS 2017.
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+27
-16
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2 files changed

+27
-16
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PCbuild/find_msbuild.bat

Lines changed: 1 addition & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -32,20 +32,13 @@
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@rem VS 2017 and later provide vswhere.exe, which can be used
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@if not exist "%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe" goto :skip_vswhere
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@set _Py_MSBuild_Root=
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@for /F "tokens=*" %%i in ('"%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe" -property installationPath -latest') DO @(set _Py_MSBuild_Root=%%i\MSBuild)
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@for /F "tokens=*" %%i in ('"%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe" -property installationPath -latest -prerelease -products * -requires Microsoft.VisualStudio.Component.VC.Tools.x86.x64') DO @(set _Py_MSBuild_Root=%%i\MSBuild)
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@if not defined _Py_MSBuild_Root goto :skip_vswhere
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@for %%j in (Current 15.0) DO @if exist "%_Py_MSBuild_Root%\%%j\Bin\msbuild.exe" (set MSBUILD="%_Py_MSBuild_Root%\%%j\Bin\msbuild.exe")
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@set _Py_MSBuild_Root=
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@if defined MSBUILD @if exist %MSBUILD% (set _Py_MSBuild_Source=Visual Studio installation) & goto :found
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:skip_vswhere
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@rem VS 2017 sets exactly one install as the "main" install, so we may find MSBuild in there.
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@reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\SxS\VS7" /v 15.0 /reg:32 >nul 2>nul
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@if NOT ERRORLEVEL 1 @for /F "tokens=1,2*" %%i in ('reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\SxS\VS7" /v 15.0 /reg:32') DO @(
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@if "%%i"=="15.0" @if exist "%%k\MSBuild\15.0\Bin\msbuild.exe" @(set MSBUILD="%%k\MSBuild\15.0\Bin\msbuild.exe")
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)
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@if exist %MSBUILD% (set _Py_MSBuild_Source=Visual Studio 2017 registry) & goto :found
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@rem VS 2015 and earlier register MSBuild separately, so we can find it.
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@reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSBuild\ToolsVersions\14.0" /v MSBuildToolsPath /reg:32 >nul 2>nul
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@if NOT ERRORLEVEL 1 @for /F "tokens=1,2*" %%i in ('reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSBuild\ToolsVersions\14.0" /v MSBuildToolsPath /reg:32') DO @(

PCbuild/pyproject.props

Lines changed: 26 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -195,23 +195,41 @@ public override bool Execute() {
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</Target>
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<Target Name="FindVCRuntime" Returns="VCRuntimeDLL">
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<PropertyGroup Condition="$(PlatformToolset) != 'v140'">
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<VCRedistDir>$(VCInstallDir)\Redist\MSVC\$(VCToolsRedistVersion)\</VCRedistDir>
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<VCRedistDir Condition="$(Platform) == 'Win32'">$(VCRedistDir)x86\</VCRedistDir>
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<VCRedistDir Condition="$(Platform) != 'Win32'">$(VCRedistDir)$(Platform)\</VCRedistDir>
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</PropertyGroup>
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<Target Name="FindVCRedistDir">
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<!-- Hard coded path for VS 2015 -->
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<PropertyGroup Condition="$(PlatformToolset) == 'v140'">
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<VCRedistDir>$(VCInstallDir)\redist\</VCRedistDir>
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</PropertyGroup>
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<!-- Search for version number in some broken Build Tools installs -->
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<ItemGroup Condition="$(VCRedistDir) == '' and $(VCToolsRedistVersion) == ''">
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<_RedistFiles Include="$(VCInstallDir)\Redist\MSVC\*\*.*" />
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</ItemGroup>
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<PropertyGroup Condition="$(VCRedistDir) == '' and $(VCToolsRedistVersion) == ''">
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<_RedistDir>%(_RedistFiles.Directory)</_RedistDir>
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<VCToolsRedistVersion>$([System.IO.Path]::GetFileName($(_RedistDir.Trim(`\`))))</VCToolsRedistVersion>
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</PropertyGroup>
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<!-- Use correct path for VS 2017 and later -->
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<PropertyGroup Condition="$(VCRedistDir) == ''">
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<VCRedistDir>$(VCInstallDir)\Redist\MSVC\$(VCToolsRedistVersion)\</VCRedistDir>
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</PropertyGroup>
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<PropertyGroup>
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<VCRedistDir Condition="$(Platform) == 'Win32'">$(VCRedistDir)x86\</VCRedistDir>
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<VCRedistDir Condition="$(Platform) != 'Win32'">$(VCRedistDir)$(Platform)\</VCRedistDir>
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</PropertyGroup>
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<Message Text="VC Redist Directory: $(VCRedistDir)" />
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<Message Text="VC Redist Version: $(VCToolsRedistVersion)" />
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</Target>
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<Target Name="FindVCRuntime" Returns="VCRuntimeDLL" DependsOnTargets="FindVCRedistDir">
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<ItemGroup Condition="$(VCInstallDir) != ''">
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<VCRuntimeDLL Include="$(VCRedistDir)\Microsoft.VC*.CRT\vcruntime*.dll" />
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</ItemGroup>
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<Warning Text="vcruntime14*.dll not found under $(VCInstallDir)" Condition="@(VCRuntimeDLL) == ''" />
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<Message Text="VCRuntimeDLL: @(VCRuntimeDLL)" Importance="high" />
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<Warning Text="vcruntime*.dll not found under $(VCRedistDir)." Condition="@(VCRuntimeDLL) == ''" />
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<Message Text="VC Runtime DLL(s):%0A- @(VCRuntimeDLL,'%0A- ')" />
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</Target>
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</Project>

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