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[msbuild] Enable nullability for the remaining files in this directory.#25035

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rolfbjarne merged 1 commit intomainfrom
dev/rolf/msbuild-nullability
Mar 28, 2026
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[msbuild] Enable nullability for the remaining files in this directory.#25035
rolfbjarne merged 1 commit intomainfrom
dev/rolf/msbuild-nullability

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And fix any resulting issues.

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Pull request overview

Enables nullable reference types in msbuild/Messaging/Xamarin.Messaging.Build source files and addresses resulting nullability issues/warnings in the build messaging agent/runtime.

Changes:

  • Switched the remaining files from #nullable disable to #nullable enable.
  • Updated API surface to reflect nullable optional parameters (string?).
  • Adjusted deserialization and path-handling code to compile under nullable analysis.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File Description
msbuild/Messaging/Xamarin.Messaging.Build/TaskRunner.cs Enables nullable and adjusts deserialization and dotnet path/root-path logic.
msbuild/Messaging/Xamarin.Messaging.Build/BuildAgent.cs Enables nullable, updates ctor optional parameters, and adjusts environment-variable setup.
Comments suppressed due to low confidence (1)

msbuild/Messaging/Xamarin.Messaging.Build/BuildAgent.cs:74

  • Path.GetDirectoryName (assemblyLocation) can return null (for example when Assembly.Location is empty in single-file/dynamic scenarios). The null-forgiving operator would then allow a null path to flow into AddValueToEnvVariable, causing runtime exceptions. Consider using a non-null source like AppContext.BaseDirectory/ProcessPath, or add an explicit null/empty check with a clear failure mode before using path.
			var assemblyLocation = this.GetType ().Assembly.Location;
			var path = Path.GetDirectoryName (assemblyLocation)!;

			AddValueToEnvVariable ("MONO_GAC_PREFIX", path);
			AddValueToEnvVariable ("PATH", path);
			AddValueToEnvVariable ("PKG_CONFIG_PATH", path);

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✅ [CI Build #de978a1] Build passed (Build packages) ✅

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Hash: de978a13d1f504156d5f2f4d59d9743e669f811e [PR build]

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✅ [PR Build #de978a1] Build passed (Detect API changes) ✅

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Hash: de978a13d1f504156d5f2f4d59d9743e669f811e [PR build]

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✅ API diff for current PR / commit

NET (empty diffs)

✅ API diff vs stable

NET (empty diffs)

ℹ️ Generator diff

Generator Diff: vsdrops (html) vsdrops (raw diff) gist (raw diff) - Please review changes)

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Hash: de978a13d1f504156d5f2f4d59d9743e669f811e [PR build]

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✅ [CI Build #de978a1] Build passed (Build macOS tests) ✅

Pipeline on Agent
Hash: de978a13d1f504156d5f2f4d59d9743e669f811e [PR build]

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🚀 [CI Build #de978a1] Test results 🚀

Test results

✅ All tests passed on VSTS: test results.

🎉 All 156 tests passed 🎉

Tests counts

✅ 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. [attempt 2] Html Report (VSDrops) Download
✅ dotnettests (macOS): 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 6 tests passed. Html Report (VSDrops) Download
✅ linker: All 44 tests passed. Html Report (VSDrops) Download
✅ monotouch (iOS): All 11 tests passed. Html Report (VSDrops) Download
✅ monotouch (MacCatalyst): All 15 tests passed. Html Report (VSDrops) Download
✅ monotouch (macOS): All 12 tests passed. Html Report (VSDrops) Download
✅ monotouch (tvOS): All 11 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 Monterey (12): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Ventura (13): All 5 tests passed. Html Report (VSDrops) Download
✅ 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: de978a13d1f504156d5f2f4d59d9743e669f811e [PR build]

@rolfbjarne rolfbjarne merged commit 9634c8e into main Mar 28, 2026
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