public void ScanAddIns(IAddInManagerOptions addinManagerOptions)
{
var folder = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, addinManagerOptions.PluginsDirectory);
var externalAssembliesFiles = Array.Empty <string>();
try
{
externalAssembliesFiles = Directory.GetFiles(folder, "*.dll", SearchOption.AllDirectories);
}
catch (DirectoryNotFoundException ex)
{
Console.WriteLine($"AddIns Folder doesn't exist. Configured Folder was '{folder}'");
Console.WriteLine("A new folder will be created.");
Directory.CreateDirectory(folder);
}
var scannedPlugins = new List <IAddIn>();
foreach (string file in externalAssembliesFiles)
{
var assembly = Assembly.LoadFile(file);
scannedPlugins = assembly
.GetTypes()
.Where(type => typeof(IAddIn).IsAssignableFrom(type) && !type.IsInterface && !type.IsAbstract)
.Select(Activator.CreateInstance)
.Cast <IAddIn>()
.ToList();
}
scannedAddIns.AddRange(scannedPlugins); //Adds External AddIns
AppDomain.CurrentDomain
.GetAssemblies()
.ToList()
.ForEach(assembly =>
{
var localAddIns = assembly
.GetTypes()
.Where(type => typeof(IAddIn).IsAssignableFrom(type) && !type.IsInterface && !type.IsAbstract)
.Select(Activator.CreateInstance)
.Cast <IAddIn>()
.ToList();
scannedAddIns.AddRange(localAddIns); //Adds Internal AddIns
});
var distinctAddIns = scannedAddIns.Distinct().ToList(); //Ensure same plugin is loaded once!
scannedAddIns.Clear();
scannedAddIns.AddRange(distinctAddIns);
}
public static IAddInProvider LoadPlugins(IAddInManagerOptions options)
{
if (Instance != null)
{
throw new InvalidOperationException("Provider already loaded.");
}
var callingMethod = new StackTrace().GetFrame(1).GetMethod();
if (callingMethod.Name != "Main" || !callingMethod.IsStatic || callingMethod.ReflectedType.Name != "Program")
{
throw new InvalidOperationException("You must call AddInProvider.LoadPlugins() inside Program.Main().");
}
Instance = new AddInProvider();
Instance.ScanAddIns(options);
return(Instance);
}
