Remove dev10 related code from Toolset class #12207
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Co-authored-by: YuliiaKovalova <95473390+YuliiaKovalova@users.noreply.github.com>
Co-authored-by: YuliiaKovalova <95473390+YuliiaKovalova@users.noreply.github.com>
Copilot finished work on behalf of
YuliiaKovalova
July 21, 2025 09:49
YuliiaKovalova
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Jul 21, 2025
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Pull Request Overview
This PR removes legacy Visual Studio 2010 (dev10) detection and related workarounds from the MSBuild Toolset class, simplifying the codebase by eliminating registry-based detection for an unsupported IDE version.
- Removes dev10 registry detection logic and constants
- Eliminates special case hardcoded "10.0" subtoolset selection for ToolsVersion "4.0"
- Updates subtoolset selection to consistently pick the highest available version numerically
Reviewed Changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| src/Build/Resources/Constants.cs | Removes Dev10SubToolsetValue constant |
| src/Build/Definition/Toolset.cs | Removes dev10 detection logic and registry constants, simplifies subtoolset selection |
| src/Build.UnitTests/Evaluation/Evaluator_Tests.cs | Updates test comments to reflect new behavior |
| src/Build.UnitTests/Definition/Toolset_Tests.cs | Updates test expectations to match simplified logic |
Comments suppressed due to low confidence (1)
src/Build.UnitTests/Definition/Toolset_Tests.cs:178
- The test assertion is too generic and doesn't verify the expected behavior. Instead of just checking if it's null or a valid version, the test should verify that it returns the highest available subtoolset version numerically, which is the specific behavior change being implemented.
Assert.True(defaultSubToolset == null || Version.TryParse(defaultSubToolset, out _),
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This PR removes ancient dev10 (Visual Studio 2010) related code from the Toolset class to reduce complexity and eliminate unsupported legacy code.
Changes Made
Dev10IsInstalledproperty that checked for Visual Studio 2010 installationsComputeDefaultSubToolsetVersion()method now consistently picks the highest available subtoolset version numericallyDev10SubToolsetValueconstant fromConstants.csMicrosoft.Win32using directiveFiles Modified
src/Build/Definition/Toolset.cs- Core logic changessrc/Build/Resources/Constants.cs- Removed constantsrc/Build.UnitTests/Definition/Toolset_Tests.cs- Updated test expectationssrc/Build.UnitTests/Evaluation/Evaluator_Tests.cs- Updated test and commentsBehavior Change
Before: ToolsVersion "4.0" would return "10.0" as the default subtoolset if dev10 was detected via registry, otherwise it would pick the highest available subtoolset.
After: All toolsets consistently pick the highest available subtoolset version, removing the dev10 special case entirely.
This change simplifies the codebase by removing detection logic for an unsupported Visual Studio version while maintaining consistent subtoolset selection behavior.
Fixes #12193.
Warning
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dnceng.pkgs.visualstudio.comdotnet test src/Build.UnitTests/Microsoft.Build.Engine.UnitTests.csproj --filter FullyQualifiedName~Toolset_Tests --verbosity normal(dns block)/home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js(dns block)dotnet test src/Build.UnitTests/Microsoft.Build.Engine.UnitTests.csproj --filter FullyQualifiedName~VerifyDefaultSubToolsetPropertiesAreEvaluated --verbosity normal(dns block)If you need me to access, download, or install something from one of these locations, you can either:
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