[xaprepare] Remove desktop Mono provisioning and dead Mono-related code#11324
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The `UpdateMono` xaprepare scenario installs desktop Mono on macOS, but the only consumer (mdoc in the apidocs pipeline) already installs Mono independently via `boots`. The emulator test pipelines passed `updateMono: true` but never actually used Mono for anything. Also removes dead code: - `ManagedRuntime`/`_Runtime`/`_NUnit` properties (zero consumers) - `UpdateMonoAndroidContract` target (zero callers) - `prepare-update-mono`/`shutdown-compiler-server` Makefile targets - Mono version properties (MonoDarwinPackageUrl, etc.) Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Pull request overview
This PR continues the incremental removal of xaprepare Mono provisioning by deleting the dead UpdateMono scenario and associated Mono version/configuration plumbing, and by cleaning up CI YAML/Makefile usage that no longer has any effect.
Changes:
- Removed the
UpdateMonoxaprepare scenario and macOS Mono package provisioning code, along with relatedKnownConditions/KnownProperties. - Removed Mono-related MSBuild properties from
Configuration.propsand eliminated the deadUpdateMonoAndroidContracttarget. - Cleaned up Azure Pipelines templates and Makefile targets/variables that referenced Mono updates.
Reviewed changes
Copilot reviewed 18 out of 18 changed files in this pull request and generated 2 comments.
Show a summary per file
| File | Description |
|---|---|
| tests/api-compatibility/README.md | Updates docs to reflect removal of the UpdateMonoAndroidContract target. |
| tests/api-compatibility/api-compatibility.targets | Deletes the unused UpdateMonoAndroidContract target implementation. |
| Makefile | Removes unused Mono detection/version printing and Mono-era helper targets. |
| Documentation/building/unix/dependencies.md | Updates Unix dependency docs to no longer require Mono for local builds. |
| Documentation/building/configuration.md | Removes documentation for Mono version enforcement properties. |
| Configuration.props | Removes unused Mono provisioning/runtime properties with no remaining consumers. |
| build-tools/xaprepare/xaprepare/xaprepare.targets | Removes replacements for deleted Mono-related properties in generated defaults. |
| build-tools/xaprepare/xaprepare/Scenarios/Scenario_UpdateMono.Unix.cs | Deletes the dead UpdateMono scenario. |
| build-tools/xaprepare/xaprepare/ConfigAndData/Dependencies/MacOS.cs | Removes conditional Mono package dependency wiring. |
| build-tools/xaprepare/xaprepare/Application/Properties.Defaults.cs.in | Removes default property entries for deleted Mono-related properties. |
| build-tools/xaprepare/xaprepare/Application/MonoPkgProgram.MacOS.cs | Deletes macOS Mono package installer program implementation. |
| build-tools/xaprepare/xaprepare/Application/KnownProperties.cs | Removes Mono-related property constants. |
| build-tools/xaprepare/xaprepare/Application/KnownConditions.cs | Removes the Mono-update condition and updates related comments. |
| build-tools/automation/yaml-templates/stage-msbuild-emulator-tests.yaml | Removes unused updateMono parameter usage. |
| build-tools/automation/yaml-templates/setup-test-environment.yaml | Removes updateMono parameter plumb-through. |
| build-tools/automation/yaml-templates/setup-test-environment-steps.yaml | Removes conditional xaprepare UpdateMono execution step. |
| build-tools/automation/yaml-templates/setup-test-environment-public.yaml | Removes updateMono parameter plumb-through. |
| build-tools/automation/azure-pipelines-public.yaml | Removes unused updateMono: true configuration. |
- Remove "Latest Mono" from dependency list in dependencies.md - Use consistent Mono.Android.dll.zip naming in api-compatibility README - Remove obsolete mono cil-strip.exe instructions Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
jonathanpeppers
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May 12, 2026
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Summary
Part of incremental xaprepare removal. The
UpdateMonoxaprepare scenario is dead - the only Mono consumer (mdoc) is in the apidocs pipeline (azure-pipelines-apidocs.yaml) which provisions Mono itself viaboots, not via xaprepare.The emulator test pipelines passed
updateMono: truebut never actually used Mono for anything - it was leftover config.Changes
xaprepare deletions
Scenario_UpdateMono.Unix.csandMonoPkgProgram.MacOS.csAllowMonoUpdatecondition fromKnownConditions.csMonoDarwinPackageUrl,MonoRequiredMinimumVersion,MonoRequiredMaximumVersion,IgnoreMaxMonoVersion,IgnoreMinMonoVersion,ManagedRuntimefromKnownProperties.cs,Properties.Defaults.cs.in, andxaprepare.targetsMonoPkgProgramdependency fromMacOS.csYAML cleanup
updateMonoparameter fromsetup-test-environment-steps.yaml,setup-test-environment-public.yaml,setup-test-environment.yamlupdateMono: truefromstage-msbuild-emulator-tests.yamlandazure-pipelines-public.yamlMakefile cleanup
RUNTIMEvariable (line 6 - Mono detection, unused)mono --versionfromrun-all-testsshutdown-compiler-servertarget (VBCSCompiler kill - Mono-era MSBuild)prepare-update-monotargetConfiguration.props cleanup
ManagedRuntime,ManagedRuntimeArgs(zero consumers)MonoDarwinPackageUrl,MonoRequiredMinimumVersion,MonoRequiredMaximumVersionIgnoreMaxMonoVersion(2 lines)_Runtime,_NUnit(zero consumers)Dead target deletion
UpdateMonoAndroidContracttarget fromapi-compatibility.targets(zero callers, uses ancient net472 GenAPI.exe with$(ManagedRuntime))Documentation
dependencies.mdandconfiguration.mdto remove references to Mono version propertiesapi-compatibility/README.mdto note the removed target