static SubsystemManager()
{
var subsystems = new SubsystemInfo[]
{
SubsystemInfo.Create <ICommandPredictor>(
SubsystemKind.CommandPredictor,
allowUnregistration: true,
allowMultipleRegistration: true),
SubsystemInfo.Create <ICrossPlatformDsc>(
SubsystemKind.CrossPlatformDsc,
allowUnregistration: true,
allowMultipleRegistration: false),
};
var subSystemTypeMap = new Dictionary <Type, SubsystemInfo>(subsystems.Length);
var subSystemKindMap = new Dictionary <SubsystemKind, SubsystemInfo>(subsystems.Length);
foreach (var subsystem in subsystems)
{
subSystemTypeMap.Add(subsystem.SubsystemType, subsystem);
subSystemKindMap.Add(subsystem.Kind, subsystem);
}
s_subsystems = new ReadOnlyCollection <SubsystemInfo>(subsystems);
s_subSystemTypeMap = new ReadOnlyDictionary <Type, SubsystemInfo>(subSystemTypeMap);
s_subSystemKindMap = new ReadOnlyDictionary <SubsystemKind, SubsystemInfo>(subSystemKindMap);
}
private static void UnregisterSubsystem(SubsystemInfo subsystemInfo, Guid id)
{
if (subsystemInfo.RequiredCmdlets.Count > 0 || subsystemInfo.RequiredFunctions.Count > 0)
{
throw new NotSupportedException("NotSupported yet: unregister subsystem that introduced new cmdlets/functions.");
}
ISubsystem impl = subsystemInfo.UnregisterImplementation(id);
if (impl is IDisposable disposable)
{
disposable.Dispose();
}
}
private static void RegisterSubsystem(SubsystemInfo subsystemInfo, ISubsystem proxy)
{
if (proxy.Id == Guid.Empty)
{
throw new ArgumentException(
StringUtil.Format(
SubsystemStrings.EmptyImplementationId,
subsystemInfo.Kind.ToString()),
nameof(proxy));
}
if (string.IsNullOrEmpty(proxy.Name))
{
throw new ArgumentException(
StringUtil.Format(
SubsystemStrings.NullOrEmptyImplementationName,
subsystemInfo.Kind.ToString()),
nameof(proxy));
}
if (string.IsNullOrEmpty(proxy.Description))
{
throw new ArgumentException(
StringUtil.Format(
SubsystemStrings.NullOrEmptyImplementationDescription,
subsystemInfo.Kind.ToString()),
nameof(proxy));
}
if (subsystemInfo.RequiredCmdlets.Count > 0 || subsystemInfo.RequiredFunctions.Count > 0)
{
// Process 'proxy.CmdletImplementationAssembly' and 'proxy.FunctionsToDefine'
// Functions are added to global scope.
// Cmdlets are loaded in a way like a snapin, making the 'Source' of the cmdlets to be 'Microsoft.PowerShell.Core'.
//
// For example, let's say the Job adapter is made a subsystem, then all `*-Job` cmdlets will be moved out of S.M.A
// into a subsystem implementation DLL. After registration, all `*-Job` cmdlets should be back in the
// 'Microsoft.PowerShell.Core' namespace to keep backward compatibility.
//
// Both cmdlets and functions are added to the default InitialSessionState used for creating a new Runspace,
// so the subsystem works for all subsequent new runspaces after it's registered.
// Take the Job adapter subsystem as an instance again, so when creating another Runspace after the registration,
// all '*-Job' cmdlets should be available in the 'Microsoft.PowerShell.Core' namespace by default.
}
subsystemInfo.RegisterImplementation(proxy);
}
private static void UnregisterSubsystem(SubsystemInfo subsystemInfo, Guid id)
{
if (subsystemInfo.RequiredCmdlets.Count > 0 || subsystemInfo.RequiredFunctions.Count > 0)
{
throw new NotSupportedException("NotSupported yet: unregister subsystem that introduced new cmdlets/functions.");
}
ISubsystem impl = subsystemInfo.UnregisterImplementation(id);
if (impl is IDisposable disposable)
{
try
{
disposable.Dispose();
}
catch
{
// It's OK to ignore all exceptions when disposing the object.
}
}
}