private static bool TryGetTargetFramework(MetadataReader metadata, [NotNullWhen(true)] out string?targetFramework)
{
var assembly = metadata.GetAssemblyDefinition();
var attributeHandles = assembly.GetCustomAttributes();
foreach (var attributeHandle in attributeHandles)
{
var attribute = metadata.GetCustomAttribute(attributeHandle);
var(assemblyName, name) = TypeNameGenerator.GetFullName(attribute.Constructor, metadata);
if (assemblyName == "mscorlib" && name == "System.Runtime.Versioning.TargetFrameworkAttribute..ctor")
{
var decoded = attribute.DecodeValue(TargetFrameworkAttributeDecoder.Default);
var frameworkDisplayName = decoded.NamedArguments.SingleOrDefault(arg => arg.Name == "FrameworkDisplayName");
if (frameworkDisplayName.Name == "FrameworkDisplayName")
{
targetFramework = (string)frameworkDisplayName.Value;
return(true);
}
}
}
targetFramework = null;
return(false);
}
public string GetTypeFromReference(MetadataReader reader, TypeReferenceHandle handle, byte rawTypeKind)
{
var(_, typeName) = TypeNameGenerator.GetFullName(handle, reader);
return(typeName);
}
public string GetTypeFromDefinition(MetadataReader reader, TypeDefinitionHandle handle, byte rawTypeKind)
{
var(_, typeName) = TypeNameGenerator.GetFullName(handle, reader);
return(typeName);
}
internal static UsageInformation FindUsedNuGetApis(MetadataReader metadata)
{
var result = new UsageInformation();
void AddMember(string assembly, string member)
{
if (!result.MemberReferences.TryGetValue(assembly, out HashSet <string>?apis))
{
apis = new HashSet <string>();
result.MemberReferences[assembly] = apis;
}
apis.Add(member);
}
foreach (var memberReferenceHandle in metadata.MemberReferences)
{
var memberReference = metadata.GetMemberReference(memberReferenceHandle);
var foundAssemblyReference = TryFindAssemblyReference(memberReferenceHandle, metadata, out var assemblyReference);
if (foundAssemblyReference && NuGetAssembly.IsNuGetAssembly(assemblyReference))
{
var assemblyName = assemblyReference.GetAssemblyName();
var version = assemblyName.Version?.ToString();
if (version != null)
{
result.Versions.Add(version);
}
var kind = memberReference.GetKind();
switch (kind)
{
case MemberReferenceKind.Method:
{
var(assembly, member) = TypeNameGenerator.GetFullName(memberReferenceHandle, metadata);
var sig = memberReference.DecodeMethodSignature(MethodSignatureDecoder.Default, null);
var methodSignature = GetMethodSignature(member, sig);
AddMember(assembly, methodSignature);
}
break;
case MemberReferenceKind.Field:
{
var(assembly, member) = TypeNameGenerator.GetFullName(memberReferenceHandle, metadata);
AddMember(assembly, member);
}
break;
default:
throw new NotImplementedException(kind.ToString());
}
}
}
if (result.MemberReferences.SelectMany(r => r.Value).Any())
{
if (TryGetTargetFramework(metadata, out string?targetFramework))
{
result.TargetFrameworks.Add(targetFramework);
}
}
return(result);
}
