public EvaluationContext (string source, ExpressionEvaluator evaluator)
{
Source = source;
Evaluator = evaluator;
}
bool RunBuildTask (ProjectTargetInstance target, ProjectTaskInstance taskInstance, TargetResult targetResult, InternalBuildArguments args)
{
var request = submission.BuildRequest;
var host = request.HostServices == null ? null : request.HostServices.GetHostObject (request.ProjectFullPath, target.Name, taskInstance.Name);
// Create Task instance.
var factoryIdentityParameters = new Dictionary<string,string> ();
#if NET_4_5
factoryIdentityParameters ["MSBuildRuntime"] = taskInstance.MSBuildRuntime;
factoryIdentityParameters ["MSBuildArchitecture"] = taskInstance.MSBuildArchitecture;
#endif
var task = args.BuildTaskFactory.CreateTask (taskInstance.Name, factoryIdentityParameters, this);
if (task == null)
throw new InvalidOperationException (string.Format ("TaskFactory {0} returned null Task", args.BuildTaskFactory));
LogMessageEvent (new BuildMessageEventArgs (string.Format ("Using task {0} from {1}", taskInstance.Name, task.GetType ()), null, null, MessageImportance.Low));
task.HostObject = host;
task.BuildEngine = this;
// Prepare task parameters.
var evaluator = new ExpressionEvaluator (project);
var evaluatedTaskParams = taskInstance.Parameters.Select (p => new KeyValuePair<string,string> (p.Key, project.ExpandString (evaluator, p.Value)));
var requiredProps = task.GetType ().GetProperties ()
.Where (p => p.CanWrite && p.GetCustomAttributes (typeof (RequiredAttribute), true).Any ());
var missings = requiredProps.Where (p => !evaluatedTaskParams.Any (tp => tp.Key.Equals (p.Name, StringComparison.OrdinalIgnoreCase)));
if (missings.Any ())
throw new InvalidOperationException (string.Format ("Task {0} of type {1} is used without specifying mandatory property: {2}",
taskInstance.Name, task.GetType (), string.Join (", ", missings.Select (p => p.Name).ToArray ())));
foreach (var p in evaluatedTaskParams) {
switch (p.Key.ToLower ()) {
case "condition":
case "continueonerror":
continue;
}
var prop = task.GetType ().GetProperty (p.Key);
if (prop == null)
throw new InvalidOperationException (string.Format ("Task {0} does not have property {1}", taskInstance.Name, p.Key));
if (!prop.CanWrite)
throw new InvalidOperationException (string.Format ("Task {0} has property {1} but it is read-only.", taskInstance.Name, p.Key));
if (string.IsNullOrEmpty (p.Value) && !requiredProps.Contains (prop))
continue;
try {
prop.SetValue (task, ConvertTo (p.Value, prop.PropertyType, evaluator), null);
} catch (Exception ex) {
throw new InvalidOperationException (string.Format ("Failed to convert '{0}' for property '{1}' of type {2}", p.Value, prop.Name, prop.PropertyType), ex);
}
}
// Do execute task.
bool taskSuccess = false;
event_source.FireTaskStarted (this, new TaskStartedEventArgs ("Task Started", null, project.FullPath, taskInstance.FullPath, taskInstance.Name));
try {
taskSuccess = task.Execute ();
if (!taskSuccess) {
targetResult.Failure (null);
if (!ContinueOnError) {
return false;
}
} else {
// Evaluate task output properties and items.
foreach (var to in taskInstance.Outputs) {
if (!project.EvaluateCondition (to.Condition))
continue;
var toItem = to as ProjectTaskOutputItemInstance;
var toProp = to as ProjectTaskOutputPropertyInstance;
string taskParameter = toItem != null ? toItem.TaskParameter : toProp.TaskParameter;
var pi = task.GetType ().GetProperty (taskParameter);
if (pi == null)
throw new InvalidOperationException (string.Format ("Task {0} does not have property {1} specified as TaskParameter", taskInstance.Name, toItem.TaskParameter));
if (!pi.CanRead)
throw new InvalidOperationException (string.Format ("Task {0} has property {1} specified as TaskParameter, but it is write-only", taskInstance.Name, toItem.TaskParameter));
var value = pi.GetValue (task, null);
var valueString = ConvertFrom (value);
if (toItem != null) {
LogMessageEvent (new BuildMessageEventArgs (string.Format ("Output Item {0} from TaskParameter {1}: {2}", toItem.ItemType, toItem.TaskParameter, valueString), null, null, MessageImportance.Low));
Action<ITaskItem> addItem = i => {
var metadata = new ArrayList (i.MetadataNames).ToArray ().Cast<string> ().Select (n => new KeyValuePair<string,string> (n, i.GetMetadata (n)));
args.Project.AddItem (toItem.ItemType, i.ItemSpec, metadata);
};
var taskItemArray = value as ITaskItem [];
if (taskItemArray != null) {
foreach (var ti in taskItemArray)
addItem (ti);
} else {
var taskItem = value as ITaskItem;
if (taskItem != null)
addItem (taskItem);
else
foreach (var item in valueString.Split (';'))
args.Project.AddItem (toItem.ItemType, item);
}
} else {
LogMessageEvent (new BuildMessageEventArgs (string.Format ("Output Property {0} from TaskParameter {1}: {2}", toProp.PropertyName, toProp.TaskParameter, valueString), null, null, MessageImportance.Low));
args.Project.SetProperty (toProp.PropertyName, valueString);
}
}
}
} finally {
event_source.FireTaskFinished (this, new TaskFinishedEventArgs ("Task Finished", null, project.FullPath, taskInstance.FullPath, taskInstance.Name, taskSuccess));
}
return true;
}
object ConvertTo (string source, Type targetType, ExpressionEvaluator evaluator)
{
if (targetType == typeof (ITaskItem) || targetType.IsSubclassOf (typeof (ITaskItem))) {
var item = evaluator.EvaluatedTaskItems.FirstOrDefault (i => string.Equals (i.ItemSpec, source.Trim (), StringComparison.OrdinalIgnoreCase));
var ret = new TargetOutputTaskItem () { ItemSpec = source.Trim () };
if (item != null)
foreach (string name in item.MetadataNames)
ret.SetMetadata (name, item.GetMetadata (name));
return ret;
}
if (targetType.IsArray)
return new ArrayList (source.Split (';').Select (s => s.Trim ()).Where (s => !string.IsNullOrEmpty (s)).Select (s => ConvertTo (s, targetType.GetElementType (), evaluator)).ToArray ())
.ToArray (targetType.GetElementType ());
if (targetType == typeof (bool)) {
switch (source != null ? source.ToLower (CultureInfo.InvariantCulture) : string.Empty) {
case "true":
case "yes":
case "on":
return true;
case "false":
case "no":
case "off":
case "":
return false;
}
}
return Convert.ChangeType (source == "" ? null : source, targetType);
}
public EvaluationContext(string source, ExpressionEvaluator evaluator)
{
Source = source;
Evaluator = evaluator;
}
