public static IEnumerable <string> FindPluginAssemblies(string pluginFolder, bool includeFramework = false)
{
// Storage to ensure not loading the same assembly twice and optimize calls to GetAssemblies()
IDictionary <string, bool> loaded = new ConcurrentDictionary <string, bool>();
CacheAlreadyLoadedAssemblies(loaded, includeFramework);
if (!IsPluginFolderNameSupplied())
{
yield break;
}
pluginFolder = Path.GetFullPath(pluginFolder);
if (!Directory.Exists(pluginFolder))
{
_logger.Debug($"Plugin folder '{pluginFolder}' does not exist. No plugins will be loaded.");
yield break;
}
var assemblies = Directory.GetFiles(pluginFolder, "*.dll", SearchOption.AllDirectories);
var pluginAssemblyLoadContext = new PluginAssemblyLoadContext();
try
{
foreach (var assemblyPath in assemblies)
{
var assembly = pluginAssemblyLoadContext.LoadFromAssemblyPath(assemblyPath);
if (!HasPlugin(assembly))
{
continue;
}
string assemblyDirectory = Path.GetDirectoryName(assemblyPath);
var assemblyMetadata = ReadAssemblyMetadata(assembly);
if (IsExtensionAssembly(assemblyMetadata))
{
var validator = GetExtensionValidator();
var validationResult = validator.ValidateObject(assemblyDirectory);
if (!validationResult.Any())
{
yield return(assembly.Location);
}
else
{
_logger.Warn($"Assembly: {assembly.GetName()} - {string.Join(",", validationResult)}");
}
}
else if (IsProfileAssembly(assemblyMetadata))
{
yield return(assembly.Location);
}
}
}
finally
{
pluginAssemblyLoadContext.Unload();
}
