internal ImmutableArray <DiagnosticAnalyzer> ResolveAnalyzersFromArguments(
string language,
List <DiagnosticInfo> diagnostics,
CommonMessageProvider messageProvider,
IAnalyzerAssemblyLoader analyzerLoader)
{
var analyzerBuilder = ImmutableArray.CreateBuilder <DiagnosticAnalyzer>();
EventHandler <AnalyzerLoadFailureEventArgs> errorHandler = (o, e) =>
{
var analyzerReference = o as AnalyzerFileReference;
DiagnosticInfo diagnostic;
switch (e.ErrorCode)
{
case AnalyzerLoadFailureEventArgs.FailureErrorCode.UnableToLoadAnalyzer:
diagnostic = new DiagnosticInfo(messageProvider, messageProvider.WRN_UnableToLoadAnalyzer, analyzerReference.FullPath, e.Message);
break;
case AnalyzerLoadFailureEventArgs.FailureErrorCode.UnableToCreateAnalyzer:
diagnostic = new DiagnosticInfo(messageProvider, messageProvider.WRN_AnalyzerCannotBeCreated, e.TypeName, analyzerReference.FullPath, e.Message);
break;
case AnalyzerLoadFailureEventArgs.FailureErrorCode.NoAnalyzers:
diagnostic = new DiagnosticInfo(messageProvider, messageProvider.WRN_NoAnalyzerInAssembly, analyzerReference.FullPath);
break;
case AnalyzerLoadFailureEventArgs.FailureErrorCode.None:
default:
return;
}
// Filter this diagnostic based on the compilation options so that /nowarn and /warnaserror etc. take effect.
diagnostic = messageProvider.FilterDiagnosticInfo(diagnostic, this.CompilationOptions);
if (diagnostic != null)
{
diagnostics.Add(diagnostic);
}
};
var resolvedReferences = ArrayBuilder <AnalyzerFileReference> .GetInstance();
foreach (var reference in AnalyzerReferences)
{
var resolvedReference = ResolveAnalyzerReference(reference, analyzerLoader);
if (resolvedReference != null)
{
resolvedReferences.Add(resolvedReference);
// register the reference to the analyzer loader:
analyzerLoader.AddDependencyLocation(resolvedReference.FullPath);
}
else
{
diagnostics.Add(new DiagnosticInfo(messageProvider, messageProvider.ERR_MetadataFileNotFound, reference.FilePath));
}
}
// All analyzer references are registered now, we can start loading them:
foreach (var resolvedReference in resolvedReferences)
{
resolvedReference.AnalyzerLoadFailed += errorHandler;
resolvedReference.AddAnalyzers(analyzerBuilder, language);
resolvedReference.AnalyzerLoadFailed -= errorHandler;
}
resolvedReferences.Free();
return(analyzerBuilder.ToImmutable());
}