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Add api to allow customizing options per DiagnosticAnalyzer#80200

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CyrusNajmabadi merged 90 commits intodotnet:mainfrom
CyrusNajmabadi:compilationOptionsApi
Sep 12, 2025
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Add api to allow customizing options per DiagnosticAnalyzer#80200
CyrusNajmabadi merged 90 commits intodotnet:mainfrom
CyrusNajmabadi:compilationOptionsApi

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@CyrusNajmabadi CyrusNajmabadi commented Sep 9, 2025 •
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API approved in #80143

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CyrusNajmabadi commented Sep 10, 2025
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src/Compilers/Core/Portable/DiagnosticAnalyzer/AnalyzerExecutor.cs
@@ -31,9 +31,9 @@ internal partial class AnalyzerExecutor
internal const string AnalyzerExceptionDiagnosticId = "AD0001";
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The meat of hte change is in this file.

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CyrusNajmabadi commented Sep 10, 2025
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src/Compilers/Core/Portable/DiagnosticAnalyzer/AnalyzerExecutor.cs Outdated
// can use the same instance across all actions.
var context = new SemanticModelAnalysisContext(
semanticModel, AnalyzerOptions, diagReporter.AddDiagnosticAction,
semanticModel, options, diagReporter.AddDiagnosticAction,
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Suggested change
semanticModel, options, diagReporter.AddDiagnosticAction,
semanticModel, analyzerOptions, diagReporter.AddDiagnosticAction,

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CyrusNajmabadi commented Sep 10, 2025

Ok. Performance seems unchanged:

| Method                      | Job        | InvocationCount | UnrollFactor | Mean    | Error    | StdDev   | Median  | Min     | Max     | Gen0        | Gen1       | Gen2      | Allocated  |
| GetDiagnosticsWithAnalyzers | Job-YBTWXS | 1               | 1            | 5.634 s | 0.0562 s | 0.0751 s | 5.649 s | 5.484 s | 5.756 s | 181000.0000 | 61000.0000 | 1000.0000 | 1440.27 MB |
| GetDiagnosticsWithAnalyzers | Job-IGTETM | 1               | 1            | 5.640 s | 0.0537 s | 0.0527 s | 5.642 s | 5.556 s | 5.760 s | 183000.0000 | 64000.0000 | 2000.0000 | 1446.7 MB |

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CyrusNajmabadi commented Sep 10, 2025

@dotnet/roslyn-compiler for eyes. Tnx :)

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CyrusNajmabadi commented Sep 11, 2025

@dotnet/roslyn-compiler for reviews :)

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CyrusNajmabadi commented Sep 12, 2025

@dotnet/roslyn-compiler @jjonescz @jcouv ptal :)

jjonescz
jjonescz approved these changes Sep 12, 2025
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src/Compilers/Core/Portable/DiagnosticAnalyzer/AnalyzerExecutor.cs

// Deduping map for the distinct AnalyzerConfigOptionsProvider we get back from getAnalyzerConfigOptionsProvider.
// The common case in VS host is that there is generally only 1-2 of these providers. For example, a provider
// that looks in editorconfig+vsoptions, and a provider that only looks in editorconfig. We only want to make
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Unrelated to this PR: I'm planning to enable analyzer redirecting in dev18 which would redirect built-in SDK analyzers to ones inserted in VS (to avoid compiler version mismatch). I'm not sure if that is going to break the logic of analyzer option loading.

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Pinging you offline :)

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Talked offline. We're good. The redirection tthat is done doesn't affect the status of these references as 'project references'. It just impacts the location they are loaded from. So we will still see these as project-level references, and will appropriately hookup the right non-fallback options.

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CyrusNajmabadi commented Sep 12, 2025

@dotnet/roslyn-compiler for final set of eyes.

@CyrusNajmabadi CyrusNajmabadi merged commit 906c266 into dotnet:main Sep 12, 2025
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@CyrusNajmabadi CyrusNajmabadi deleted the compilationOptionsApi branch September 12, 2025 21:28
@dotnet-policy-service dotnet-policy-service bot added this to the Next milestone Sep 12, 2025
This was referenced Sep 12, 2025
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@akhera99 akhera99 modified the milestones: Next, 18.0 P1, 18.0 P2 Sep 22, 2025
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@jasonmalinowski jasonmalinowski jasonmalinowski approved these changes

@333fred 333fred 333fred approved these changes

@jjonescz jjonescz jjonescz approved these changes

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