[mobile] .NET 11 mobile runtime configuration updates

[kotlarmilos]

Description

Remove the Mono mobile test legs from the runtime CI pipelines:

• eng/pipelines/runtime.yml: the Mono mobile smoke legs (android, iossimulator, maccatalyst), the mobile platforms dropped from MonoAOTOffsets (kept browser_wasm and wasi_wasm), and tvossimulator_arm64 dropped from the Mono AllSubsets_Mono build leg.
• eng/pipelines/extra-platforms/runtime-extra-platforms-{ioslike,ioslikesimulator,maccatalyst}.yml: the Mono AllSubsets_Mono_RuntimeTests legs.
• eng/pipelines/extra-platforms/runtime-extra-platforms-{android,androidemulator}.yml: the Mono libraries-test and runtime-test legs.
• eng/pipelines/performance/perf-build.yml: the mono_arm64_android and mono_arm64_ios build types are removed entirely (parameters and build legs), not left as disabled parameters.

WebAssembly Mono, desktop Mono, and the CoreCLR/NativeAOT mobile legs are untouched.

Validation pipelines (must pass): runtime, runtime-extra-platforms. wasm legs stay green.

Validation pins (temporary): pinned to .NET 11 test build 11.0.100-preview.6.26310.106 (AzDO dotnet-unified-build run 2996804, BAR 318158, source dotnet/dotnet@8d5d82abe13, branch dev/update-sdk-mobile-stage2) and the public general-testing NuGet feed, so CI exercises the SDK with the Mono mobile workloads and RIDs removed.

Related performance changes: dotnet/performance#5240

TODO before merge: revert the global.json SDK pin and the NuGet.config feed back to the official VMR version and the main feed.

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[Copilot]

Pull request overview

Updates the .NET 11 mobile-related CI configuration by reducing Mono mobile coverage in runtime pipelines and adjusting repo-level SDK / restore inputs to validate against a temporary SDK + feed combination.

Changes:

• Add the general-testing NuGet feed to the repo restore sources.
• Pin global.json to a specific .NET 11 preview SDK version for validation.
• Remove Mono mobile library-test legs from runtime.yml / extra-platform pipelines, and disable Mono mobile perf-build legs by default.

Show a summary per file

File	Description
NuGet.config	Adds general-testing package source (temporary validation input).
global.json	Pins repo SDK/tooling to 11.0.100-preview.6.26310.106 (temporary validation input).
eng/pipelines/runtime.yml	Removes Mono mobile library-test legs from the main runtime pipeline (keeps WASM/CoreCLR/NativeAOT legs).
eng/pipelines/performance/perf-build.yml	Disables Mono Android/iOS perf build legs by default (still available when enabled).
eng/pipelines/extra-platforms/runtime-extra-platforms-maccatalyst.yml	Removes Mono MacCatalyst libraries-test legs.
eng/pipelines/extra-platforms/runtime-extra-platforms-ioslikesimulator.yml	Removes Mono iOS-simulator libraries-test legs.
eng/pipelines/extra-platforms/runtime-extra-platforms-ioslike.yml	Removes Mono tvOS libraries-test legs.

Copilot's findings

Comments suppressed due to low confidence (1)

NuGet.config:14

• Adding general-testing as an always-on package source can change restore behavior (e.g., pulling newer prerelease packages) for both CI and local builds. If this is meant to be a temporary validation pin, consider adding an inline note here to reduce the risk of accidentally merging with the extra feed still enabled.

  <packageSources>
    <clear />
    <add key="general-testing" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/general-testing/nuget/v3/index.json" />
    <!--
      'src/test/PrepareTestAssets/PrepareTestAssets.proj' generates a NuGet.config file using this
      one as a template. The following line is a marker to insert the test restore sources.
    -->

• Files reviewed: 7/7 changed files
• Comments generated: 2

[kotlarmilos]

/azp run runtime-extra-platforms

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[Copilot]

Copilot's findings

• Files reviewed: 10/10 changed files
• Comments generated: 4

[kotlarmilos]

/azp run runtime-extra-platforms

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[github-actions]

🤖 Copilot Code Review — PR #129293

Holistic Assessment

Motivation: Justified. .NET 11 is transitioning mobile platforms from Mono to CoreCLR/NativeAOT. Removing all Mono mobile CI test legs aligns the pipeline with that direction. CoreCLR and NativeAOT mobile legs remain intact, preserving test coverage for the new runtime stack.

Approach: Clean, deletion-only removal of Mono mobile legs across all relevant pipeline files, plus bonus fixes for pre-existing parameter name mismatches. The temporary SDK/NuGet pins are clearly marked as revert-before-merge.

Summary: ⚠️ Needs Human Review. The pipeline removals are consistent, complete, and well-scoped. The PR also fixes two pre-existing parameter name bugs in ioslikesimulator.yml and maccatalyst.yml (previous reviews noted these as "pre-existing" but didn't fully recognize this PR corrects them). The only blocking item is the temporary SDK pin and NuGet feed, which must be reverted before merge — the mergeable_state is blocked, so accidental merge is prevented.

---

Detailed Findings

✅ Pipeline Removals — Consistent and complete

All Mono mobile test legs are cleanly removed across all pipeline files. Verified every deleted block had runtimeFlavor: mono targeting mobile platforms:

File	Mono Legs Removed	CoreCLR/NativeAOT Legs Intact
runtime.yml	Mono Android smoke, Mono iOS simulator smoke, Mono MacCatalyst smoke, mobile MonoAOTOffsets, tvossimulator_arm64 from AllSubsets_Mono	✅
android.yml	1 lib-test leg (android_arm/arm64)	✅
androidemulator.yml	3 legs (minijit + interpreter runtime-tests, lib-test)	✅
ioslike.yml	2 legs (tvOS AOT lib-test + runtime-test)	✅
ioslikesimulator.yml	2 legs (interp lib-test + runtime-test)	✅
maccatalyst.yml	3 legs (interp lib-test, runtime-test, AppSandbox lib-test)	✅

WASM Mono and desktop Mono legs are untouched — 12 runtimeFlavor: mono instances remain in runtime.yml, all targeting correct desktop/server platforms.

✅ Parameter Name Fixes — Correct bug fixes

The PR fixes two pre-existing parameter mismatches that would have caused legs to not be properly gated:

• ioslikesimulator.yml: Two legs changed from isiOSLikeOnlyBuild → isiOSLikeSimulatorOnlyBuild, correctly matching the file's declared parameter (line 8). All 3 remaining active legs now use the correct parameter name.
• maccatalyst.yml: One leg changed from isiOSLikeOnlyBuild → isMacCatalystOnlyBuild, correctly matching the file's declared parameter (line 8). All 6 remaining active legs now use the correct parameter name.

These are genuine fixes — the old code referenced a parameter that didn't exist in the template, causing those filter expressions to silently evaluate to empty/false.

✅ Perf Build — Parameters fully removed

perf-build.yml fully removes mono_arm64_android and mono_arm64_ios parameter declarations and all three stage references. monoBDN_arm64_android and nativeAot_arm64_ios are correctly retained.

✅ Perf Gapfill — Toggles and condition correctly updated

perf-gapfill.yml removes run_android_mono_jit and run_android_mono_aot from parameters, the or() inclusion condition, and the override blocks. No dangling references remain.

✅ No Dangling References — Clean removal

Searched across all eng/pipelines/ files: zero remaining references to mono_arm64_android, mono_arm64_ios, androidMonoJit, or androidMonoAot. The external template runtime-perf-jobs.yml@performance will simply use defaults for the now-omitted parameters — no mismatch risk.

⚠️ Temporary Pins — Must be reverted before merge (merge-blocking)

1. global.json: SDK version pinned to 11.0.100-preview.6.26310.106 (both sdk.version and tools.dotnet updated consistently ✅)
2. NuGet.config: general-testing feed added at highest priority position (before all other sources)

Both are explicitly tracked in the PR description's TODO. The author confirmed in review comments these will be reverted. Merge is currently blocked.

💡 Dead code — Follow-up cleanup opportunity

eng/pipelines/performance/templates/perf-ios-scenarios-build-jobs.yml contains a mono: false parameter with Mono iOS build steps, but no file in the repo references this template — it's unreachable dead code. Not introduced by this PR, but could be cleaned up in a follow-up.

Note

This review was generated by Copilot.

Generated by Code Review for issue #129293 · ● 12M · ◷

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