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[dotnet] Remove obsolete R2R output path workaround. Fixes #25721. - #26489

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[dotnet] Remove obsolete R2R output path workaround. Fixes #25721.#26489
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[dotnet] Remove obsolete R2R output path workaround. Fixes #25721.

Remove the workaround for dotnet/runtime#79902 that rewrote _ReadyToRunFilesToPublish paths to strip directory components.

Fixes #25721.

🤖 Pull request created by Copilot

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot AI lite review requested due to automatic review settings August 28, 2026 09:09
@rolfbjarne
rolfbjarne requested a review from dalexsoto as a code owner August 28, 2026 09:09

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Pull request overview

This PR aims to remove an obsolete MSBuild workaround related to ReadyToRun (R2R) publishing by no longer rewriting _ReadyToRunFilesToPublish item paths to strip directory components, addressing #25721.

Changes:

  • Removes the _ReadyToRunFilesToPublish “path stripping” rewrite from the custom Microsoft.Sdk.R2R.targets target.
  • Leaves the remaining _FixR2ROutputPaths logic in place for non-composite builds (setting OutputR2RImage metadata).

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Comment on lines 6 to 9
<!-- Workaround for https://github.com/dotnet/runtime/issues/79902 -->
<Target Name="_FixR2ROutputPaths" AfterTargets="_PrepareForReadyToRunCompilation">
<ItemGroup>
<_ReadyToRunFilesToPublishFixed Include="@(_ReadyToRunFilesToPublish->'$(_ReadyToRunOutputPath)/%(Filename)%(Extension)')" />
<_ReadyToRunFilesToPublish Remove="@(_ReadyToRunFilesToPublish)" />
<_ReadyToRunFilesToPublish Include="@(_ReadyToRunFilesToPublishFixed)" />
</ItemGroup>
<ItemGroup Condition="'$(PublishReadyToRunComposite)' != 'true'">
<_ReadyToRunCompileListFixed Include="@(_ReadyToRunCompileList)" OutputR2RImage="$(_ReadyToRunOutputPath)/%(Filename)%(Extension)" />
@@ -5,11 +5,6 @@

<!-- Workaround for https://github.com/dotnet/runtime/issues/79902 -->
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Hash: fe60e0fab619729e4a9a3066d19c86b1838342cf [PR build]

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🔥 [CI Build #fe60e0f] Test results 🔥

Test results

❌ Tests failed on VSTS: test results

0 tests crashed, 1 tests failed, 259 tests passed.

Failures

❌ dotnettests tests (macOS)

1 tests failed, 0 tests passed.

Failed tests

  • DotNet tests: Failed (Execution failed with exit code 1)
    • Xamarin.Tests.AppSizeTest.CoreCLR_R2R(MacOSX,"osx-arm64;osx-x64"...: 'dotnet build' failed with exit code 1
      Full command: /Users/cloudtest/vss/_work/1/s/macios/builds/downloads/dotnet-sdk-11.0.100-...

Html Report (VSDrops) Download

Successes

✅ assembly-processing: All 1 tests passed. Html Report (VSDrops) Download
✅ cecil: All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (iOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (MacCatalyst): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (Multiple platforms): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (tvOS): All 1 tests passed. Html Report (VSDrops) Download
✅ framework: All 2 tests passed. Html Report (VSDrops) Download
✅ fsharp: All 4 tests passed. Html Report (VSDrops) Download
✅ generator: All 5 tests passed. Html Report (VSDrops) Download
✅ interdependent-binding-projects: All 4 tests passed. Html Report (VSDrops) Download
✅ introspection: All 7 tests passed. Html Report (VSDrops) Download
✅ linker (iOS): All 31 tests passed. Html Report (VSDrops) Download
✅ linker (MacCatalyst): All 31 tests passed. Html Report (VSDrops) Download
✅ linker (macOS): All 21 tests passed. Html Report (VSDrops) Download
✅ linker (tvOS): All 31 tests passed. Html Report (VSDrops) Download
✅ monotouch (iOS): All 24 tests passed. Html Report (VSDrops) Download
✅ monotouch (MacCatalyst): All 24 tests passed. Html Report (VSDrops) Download
✅ monotouch (macOS): All 19 tests passed. Html Report (VSDrops) Download
✅ monotouch (tvOS): All 24 tests passed. Html Report (VSDrops) Download
✅ msbuild: All 2 tests passed. Html Report (VSDrops) Download
✅ sharpie: All 1 tests passed. Html Report (VSDrops) Download
✅ windows: All 3 tests passed. Html Report (VSDrops) Download
✅ xcframework: All 4 tests passed. Html Report (VSDrops) Download
✅ xtro: All 1 tests passed. Html Report (VSDrops) Download

macOS tests

✅ Tests on macOS Sonoma (14): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Sequoia (15): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Tahoe (26): All 5 tests passed. Html Report (VSDrops) Download

Linux Build Verification

Linux build succeeded

Pipeline on Agent
Hash: fe60e0fab619729e4a9a3066d19c86b1838342cf [PR build]

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Remove workaround for dotnet/runtime#79902 (Composite ReadyToRun fails when RelativePath has a path component)

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