[CLI] Improve removing of unused symbols (#1550)

ChangeLog.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Fix analyzer [RCS0053](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS0053) ([PR](https://github.com/dotnet/roslynator/pull/1547))
 - Fix analyzer [RCS1223](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1223) ([PR](https://github.com/dotnet/roslynator/pull/1552))
+- [CLI] Improve removing of unused symbols ([PR](https://github.com/dotnet/roslynator/pull/1550))
 
 ## [4.12.7] - 2024-10-01
 

src/CommandLine/Commands/FindSymbolCommand.cs

@@ -1,6 +1,5 @@
 // Copyright (c) .NET Foundation and Contributors. Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Diagnostics;
@@ -171,13 +170,20 @@ private static async Task<Project> RemoveSymbolsAsync(
  Project project,
  CancellationToken cancellationToken)
  {
- foreach (IGrouping<DocumentId, SyntaxReference> grouping in symbols
- .SelectMany(f => f.DeclaringSyntaxReferences)
- .GroupBy(f => project.GetDocument(f.SyntaxTree).Id))
+ foreach (IGrouping<DocumentId, (ISymbol Symbol, SyntaxReference Reference)> grouping in symbols
+ .SelectMany(s => s.DeclaringSyntaxReferences.Select(r => (Symbol: s, Reference: r)))
+ .GroupBy(f => project.GetDocument(f.Reference.SyntaxTree)!.Id))
  {
- foreach (SyntaxReference reference in grouping.OrderByDescending(f => f.Span.Start))
+ foreach ((ISymbol symbol, SyntaxReference reference) in grouping.OrderByDescending(f => f.Reference.Span.Start))
  {
  Document document = project.GetDocument(grouping.Key);
+
+ if (document is null)
+ {
+ Debug.Fail($"Document not found for a symbol declaration '{symbol.ToDisplayString(SymbolDisplayFormats.Test)}'");
+ continue;
+ }
+
  SyntaxNode root = await document.GetSyntaxRootAsync(cancellationToken);
  SyntaxNode node = root.FindNode(reference.Span);
 

src/CommandLine/FindSymbols/UnusedSymbolUtility.cs

@@ -19,6 +19,7 @@ internal static class UnusedSymbolUtility
  MetadataName.Parse("Microsoft.CodeAnalysis.CodeRefactorings.ExportCodeRefactoringProviderAttribute"),
  MetadataName.Parse("Microsoft.CodeAnalysis.Diagnostics.DiagnosticAnalyzerAttribute"),
  MetadataName.Parse("System.Composition.ExportAttribute"),
+ MetadataName.Parse("Microsoft.Extensions.Options.OptionsValidatorAttribute"),
  });
 
  private static readonly MetadataNameSet _methodAttributeSymbols = new(new[]