/// <summary>
/// Cleans up after running the task.
/// </summary>
void ITaskExecutionHost.CleanupForTask()
{
if (_resolver != null)
{
_resolver.RemoveHandler();
_resolver = null;
}
_taskFactoryWrapper = null;
// We must null this out because it could be a COM object (or any other ref-counted object) which needs to
// be released.
_taskHost = null;
CleanupCancellationToken();
ErrorUtilities.VerifyThrow(_taskInstance == null, "Task Instance should be null");
}
/// <summary>
/// Given the task name, this method tries to find the task. It uses the following search order:
/// 1) checks the tasks declared by the project, searching by exact name and task identity parameters
/// 2) checks the global task declarations (in *.TASKS in MSbuild bin dir), searching by exact name and task identity parameters
/// 3) checks the tasks declared by the project, searching by fuzzy match (missing namespace, etc.) and task identity parameters
/// 4) checks the global task declarations (in *.TASKS in MSbuild bin dir), searching by fuzzy match (missing namespace, etc.) and task identity parameters
/// 5) 1-4 again in order without the task identity parameters, to gather additional information for the user (if the task identity
/// parameters don't match, it is an error, but at least we can return them a more useful error in this case than just "could not
/// find task")
///
/// The search ordering is meant to reduce the number of assemblies we scan, because loading assemblies can be expensive.
/// The tasks and assemblies declared by the project are scanned first, on the assumption that if the project declared
/// them, they are likely used.
///
/// If the set of task identity parameters are defined, only tasks that match that identity are chosen.
/// </summary>
/// <returns>The Type of the task, or null if it was not found.</returns>
private TaskFactoryWrapper FindTaskInRegistry(IDictionary<string, string> taskIdentityParameters)
{
TaskFactoryWrapper returnClass;
if (!_intrinsicTasks.TryGetValue(_taskName, out returnClass))
{
returnClass = _projectInstance.TaskRegistry.GetRegisteredTask(_taskName, null, taskIdentityParameters, true /* exact match */, _targetLoggingContext, _taskLocation);
if (null == returnClass)
{
returnClass = _projectInstance.TaskRegistry.GetRegisteredTask(_taskName, null, taskIdentityParameters, false /* fuzzy match */, _targetLoggingContext, _taskLocation);
if (null == returnClass)
{
returnClass = _projectInstance.TaskRegistry.GetRegisteredTask(_taskName, null, null, true /* exact match */, _targetLoggingContext, _taskLocation);
if (null == returnClass)
{
returnClass = _projectInstance.TaskRegistry.GetRegisteredTask(_taskName, null, null, false /* fuzzy match */, _targetLoggingContext, _taskLocation);
if (null == returnClass)
{
_targetLoggingContext.LogError
(
new BuildEventFileInfo(_taskLocation),
"MissingTaskError",
_taskName,
_projectInstance.TaskRegistry.Toolset.ToolsPath
);
return returnClass;
}
}
string usingTaskRuntime = null;
string usingTaskArchitecture = null;
string taskRuntime = null;
string taskArchitecture = null;
if (returnClass.FactoryIdentityParameters != null)
{
returnClass.FactoryIdentityParameters.TryGetValue(XMakeAttributes.runtime, out usingTaskRuntime);
returnClass.FactoryIdentityParameters.TryGetValue(XMakeAttributes.architecture, out usingTaskArchitecture);
}
taskIdentityParameters.TryGetValue(XMakeAttributes.runtime, out taskRuntime);
taskIdentityParameters.TryGetValue(XMakeAttributes.architecture, out taskArchitecture);
_targetLoggingContext.LogError
(
new BuildEventFileInfo(_taskLocation),
"TaskExistsButHasMismatchedIdentityError",
_taskName,
usingTaskRuntime ?? XMakeAttributes.MSBuildRuntimeValues.any,
usingTaskArchitecture ?? XMakeAttributes.MSBuildArchitectureValues.any,
taskRuntime ?? XMakeAttributes.MSBuildRuntimeValues.any,
taskArchitecture ?? XMakeAttributes.MSBuildArchitectureValues.any
);
// if we've logged this error, even though we've found something, we want to act like we didn't.
return null;
}
}
if (String.IsNullOrEmpty(Environment.GetEnvironmentVariable("MSBUILDDISABLEINTRINSICMSBUILDTASK")))
{
// Map to an intrinsic task, if necessary.
if (String.Equals(returnClass.TaskFactory.TaskType.FullName, "Microsoft.Build.Tasks.MSBuild", StringComparison.OrdinalIgnoreCase))
{
returnClass = new TaskFactoryWrapper(new IntrinsicTaskFactory(typeof(MSBuild)), new LoadedType(typeof(MSBuild), AssemblyLoadInfo.Create(Assembly.GetExecutingAssembly().FullName, null)), _taskName, null);
_intrinsicTasks[_taskName] = returnClass;
}
else if (String.Equals(returnClass.TaskFactory.TaskType.FullName, "Microsoft.Build.Tasks.CallTarget", StringComparison.OrdinalIgnoreCase))
{
returnClass = new TaskFactoryWrapper(new IntrinsicTaskFactory(typeof(CallTarget)), new LoadedType(typeof(CallTarget), AssemblyLoadInfo.Create(Assembly.GetExecutingAssembly().FullName, null)), _taskName, null);
_intrinsicTasks[_taskName] = returnClass;
}
}
}
return returnClass;
}
/// <summary>
/// Ask the task host to find its task in the registry and get it ready for initializing the batch
/// </summary>
/// <returns>True if the task is found in the task registry false if otherwise.</returns>
TaskRequirements? ITaskExecutionHost.FindTask(IDictionary<string, string> taskIdentityParameters)
{
if (_taskFactoryWrapper == null)
{
_taskFactoryWrapper = FindTaskInRegistry(taskIdentityParameters);
}
if (_taskFactoryWrapper == null)
{
return null;
}
TaskRequirements requirements = TaskRequirements.None;
if (_taskFactoryWrapper.TaskFactoryLoadedType.HasSTAThreadAttribute())
{
requirements = requirements | TaskRequirements.RequireSTAThread;
}
if (_taskFactoryWrapper.TaskFactoryLoadedType.HasLoadInSeparateAppDomainAttribute())
{
requirements = requirements | TaskRequirements.RequireSeparateAppDomain;
// we're going to be remoting across the appdomain boundary, so
// create the list that we'll use to disconnect the taskitems once we're done
_remotedTaskItems = new List<TaskItem>();
}
return requirements;
}
