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> ();
factoryIdentityParameters ["MSBuildRuntime"] = taskInstance.MSBuildRuntime;
factoryIdentityParameters ["MSBuildArchitecture"] = taskInstance.MSBuildArchitecture;
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);
}
// FIXME: Exception should be caught at caller site.
bool DoBuildTarget(ProjectTargetInstance target, TargetResult targetResult, InternalBuildArguments args)
{
var request = submission.BuildRequest;
// Here we check cancellation (only after TargetStarted event).
if (args.CheckCancel())
{
targetResult.Failure(new BuildAbortedException("Build has canceled"));
return(false);
}
try {
foreach (var child in target.Children)
{
// Evaluate additional target properties
var tp = child as ProjectPropertyGroupTaskInstance;
if (tp != null)
{
if (!args.Project.EvaluateCondition(tp.Condition))
{
continue;
}
foreach (var p in tp.Properties)
{
if (!args.Project.EvaluateCondition(p.Condition))
{
continue;
}
var value = args.Project.ExpandString(p.Value);
project.SetProperty(p.Name, value);
}
continue;
}
var ii = child as ProjectItemGroupTaskInstance;
if (ii != null)
{
if (!args.Project.EvaluateCondition(ii.Condition))
{
continue;
}
foreach (var item in ii.Items)
{
if (!args.Project.EvaluateCondition(item.Condition))
{
continue;
}
project.AddItem(item.ItemType, project.ExpandString(item.Include));
}
continue;
}
var task = child as ProjectTaskInstance;
if (task != null)
{
current_task = task;
if (!args.Project.EvaluateCondition(task.Condition))
{
LogMessageEvent(new BuildMessageEventArgs(string.Format("Task '{0}' was skipped because condition '{1}' wasn't met.", task.Name, task.Condition), null, null, MessageImportance.Low));
continue;
}
if (!RunBuildTask(target, task, targetResult, args))
{
return(false);
}
continue;
}
var onError = child as ProjectOnErrorInstance;
if (onError != null)
{
continue; // evaluated under catch clause.
}
throw new NotSupportedException(string.Format("Unexpected Target element children \"{0}\"", child.GetType()));
}
} catch (Exception ex) {
// fallback task specified by OnError element
foreach (var c in target.Children.OfType <ProjectOnErrorInstance> ())
{
if (!args.Project.EvaluateCondition(c.Condition))
{
continue;
}
foreach (var fallbackTarget in project.ExpandString(c.ExecuteTargets).Split(';'))
{
BuildTargetByName(fallbackTarget, args);
}
}
int line = target.Location != null ? target.Location.Line : 0;
int col = target.Location != null ? target.Location.Column : 0;
LogErrorEvent(new BuildErrorEventArgs(null, null, target.FullPath, line, col, 0, 0, ex.Message, null, null));
targetResult.Failure(ex);
return(false);
}
return(true);
}