Handle /warnaserror with Warning analyzer bulk configuration in edito…

…rconfig

Fixes batch compiler issue in #55541. I'll create a separate PR for the fix on IDE side

src/Compilers/CSharp/Test/CommandLine/CommandLineTests.cs

@@ -12479,6 +12479,11 @@ public void TestCategoryBasedBulkAnalyzerDiagnosticConfiguration(DiagnosticSever
 dotnet_analyzer_diagnostic.category-{category}.severity = error";
  TestBulkAnalyzerConfigurationCore(analyzer, analyzerConfigText, errorlog, expectedDiagnosticSeverity: ReportDiagnostic.Warn);
 
+ // Verify category based configuration to warning + /warnaserror reports errors.
+ analyzerConfigText = $@"
+[*.cs]
+dotnet_analyzer_diagnostic.category-{category}.severity = warning";
+ TestBulkAnalyzerConfigurationCore(analyzer, analyzerConfigText, errorlog, warnAsError: true, expectedDiagnosticSeverity: ReportDiagnostic.Error);
 
  // Verify disabled by default analyzer is not enabled by category based configuration.
  analyzer = new NamedTypeAnalyzerWithConfigurableEnabledByDefault(isEnabledByDefault: false, defaultSeverity);
@@ -12559,6 +12564,12 @@ public void TestBulkAnalyzerDiagnosticConfiguration(DiagnosticSeverity defaultSe
 dotnet_analyzer_diagnostic.severity = error";
  TestBulkAnalyzerConfigurationCore(analyzer, analyzerConfigText, errorlog, expectedDiagnosticSeverity: ReportDiagnostic.Warn);
 
+ // Verify bulk configuration to warning + /warnaserror reports errors.
+ analyzerConfigText = $@"
+[*.cs]
+dotnet_analyzer_diagnostic.severity = warning";
+ TestBulkAnalyzerConfigurationCore(analyzer, analyzerConfigText, errorlog, warnAsError: true, expectedDiagnosticSeverity: ReportDiagnostic.Error);
+
  // Verify disabled by default analyzer is not enabled by bulk configuration.
  analyzer = new NamedTypeAnalyzerWithConfigurableEnabledByDefault(isEnabledByDefault: false, defaultSeverity);
  analyzerConfigText = $@"
@@ -12636,7 +12647,8 @@ private void TestBulkAnalyzerConfigurationCore(
  bool errorlog,
  ReportDiagnostic expectedDiagnosticSeverity,
  string rulesetText = null,
- bool noWarn = false)
+ bool noWarn = false,
+ bool warnAsError = false)
  {
  var diagnosticId = analyzer.Descriptor.Id;
  var dir = Temp.CreateDirectory();
@@ -12654,6 +12666,11 @@ private void TestBulkAnalyzerConfigurationCore(
  arguments = arguments.Append($"/nowarn:{diagnosticId}");
  }
 
+ if (warnAsError)
+ {
+ arguments = arguments.Append($"/warnaserror");
+ }
+
  if (errorlog)
  {
  arguments = arguments.Append($"/errorlog:errorlog");

src/Compilers/Core/Portable/DiagnosticAnalyzer/AnalyzerOptionsExtensions.cs

@@ -66,6 +66,10 @@ public static bool TryGetSeverityFromBulkConfiguration(
  if (analyzerConfigOptions.TryGetValue(categoryBasedKey, out var value) &&
  AnalyzerConfigSet.TryParseSeverity(value, out severity))
  {
+ // '/warnaserror' should bump Warning bulk configuration to Error.
+ if (severity == ReportDiagnostic.Warn && compilation.Options.GeneralDiagnosticOption == ReportDiagnostic.Error)
+ severity = ReportDiagnostic.Error;
+
  return true;
  }
 
@@ -74,6 +78,10 @@ public static bool TryGetSeverityFromBulkConfiguration(
  if (analyzerConfigOptions.TryGetValue(DotnetAnalyzerDiagnosticSeverityKey, out value) &&
  AnalyzerConfigSet.TryParseSeverity(value, out severity))
  {
+ // '/warnaserror' should bump Warning bulk configuration to Error.
+ if (severity == ReportDiagnostic.Warn && compilation.Options.GeneralDiagnosticOption == ReportDiagnostic.Error)
+ severity = ReportDiagnostic.Error;
+
  return true;
  }