/// <summary>
/// Construct a target specification.
/// </summary>
/// <param name="targetName">The name of the target</param>
/// <param name="referenceLocation">The location from which it was referred.</param>
internal TargetSpecification(string targetName, ElementLocation referenceLocation)
{
ErrorUtilities.VerifyThrowArgumentLength(targetName, "targetName");
ErrorUtilities.VerifyThrowArgumentNull(referenceLocation, "referenceLocation");
this.TargetName = targetName;
this.ReferenceLocation = referenceLocation;
}
/// <summary>
/// Constructor
/// </summary>
public TaskFactoryLoggingHost(bool isRunningWithMultipleNodes, ElementLocation elementLocation, BaseLoggingContext loggingContext)
{
ErrorUtilities.VerifyThrowArgumentNull(loggingContext, "loggingContext");
ErrorUtilities.VerifyThrowInternalNull(elementLocation, "elementLocation");
_activeProxy = true;
_isRunningWithMultipleNodes = isRunningWithMultipleNodes;
_loggingContext = loggingContext;
_elementLocation = elementLocation;
}
/// <summary>
/// Invokes the specified targets using Dev9 behavior.
/// </summary>
/// <param name="targets">The targets to build.</param>
/// <param name="continueOnError">True to continue building the remaining targets if one fails.</param>
/// <param name="taskLocation">The <see cref="ElementLocation"/> of the task.</param>
/// <returns>The results for each target.</returns>
/// <remarks>
/// Dev9 behavior refers to the following:
/// 1. The changes made during the calling target up to this point are NOT visible to this target.
/// 2. The changes made by this target are NOT visible to the calling target.
/// 3. Changes made by the calling target OVERRIDE changes made by this target.
/// </remarks>
async Task <ITargetResult[]> ITargetBuilderCallback.LegacyCallTarget(string[] targets, bool continueOnError, ElementLocation taskLocation, List <StaticTarget.Task> tasks)
{
List <TargetSpecification> targetToPush = new List <TargetSpecification>();
ITargetResult[] results = new TargetResult[targets.Length];
bool originalLegacyCallTargetContinueOnError = _legacyCallTargetContinueOnError;
_legacyCallTargetContinueOnError = _legacyCallTargetContinueOnError || continueOnError;
// Our lookup is the one used at the beginning of the calling target.
Lookup callTargetLookup = _baseLookup;
// We now record this lookup in the calling target's entry so that it may
// leave the scope just before it commits its own changes to the base lookup.
TargetEntry currentTargetEntry = _targetsToBuild.Peek();
currentTargetEntry.EnterLegacyCallTargetScope(callTargetLookup);
ITaskBuilder taskBuilder = _componentHost.GetComponent(BuildComponentType.TaskBuilder) as ITaskBuilder;
try
{
// Flag set to true if one of the targets we call fails.
bool errorResult = false;
// Now walk through the list of targets, invoking each one.
for (int i = 0; i < targets.Length; i++)
{
if (_cancellationToken.IsCancellationRequested || errorResult)
{
results[i] = new TargetResult(Array.Empty <TaskItem>(), new WorkUnitResult(WorkUnitResultCode.Skipped, WorkUnitActionCode.Continue, null));
}
else
{
targetToPush.Clear();
targetToPush.Add(new TargetSpecification(targets[i], taskLocation));
var staticTargets = new List <StaticTarget>();
// We push the targets one at a time to emulate the original CallTarget behavior.
bool pushed = await PushTargets(targetToPush, currentTargetEntry, callTargetLookup, false, true, TargetBuiltReason.None);
ErrorUtilities.VerifyThrow(pushed, "Failed to push any targets onto the stack. Target: {0} Current Target: {1}", targets[i], currentTargetEntry.Target.Name);
await ProcessTargetStack(taskBuilder, staticTargets);
// todo hackathon; what about other things on this target?
tasks.AddRange(staticTargets.SelectMany(t => t.Tasks));
if (!_cancellationToken.IsCancellationRequested)
{
results[i] = _buildResult[targets[i]];
if (results[i].ResultCode == TargetResultCode.Failure)
{
errorResult = true;
}
}
else
{
results[i] = new TargetResult(Array.Empty <TaskItem>(), new WorkUnitResult(WorkUnitResultCode.Skipped, WorkUnitActionCode.Continue, null));
}
}
}
}
finally
{
// Restore the state of the TargetBuilder to that it was prior to the CallTarget call.
// Any targets we have pushed on at this point we need to get rid of since we aren't going to process them.
// If there were normal task errors, standard error handling semantics would have taken care of them.
// If there was an exception, such as a circular dependency error, items may still be on the stack so we must clear them.
while (!Object.ReferenceEquals(_targetsToBuild.Peek(), currentTargetEntry))
{
_targetsToBuild.Pop();
}
_legacyCallTargetContinueOnError = originalLegacyCallTargetContinueOnError;
((IBuildComponent)taskBuilder).ShutdownComponent();
}
return(results);
}
/// <summary>
/// Empty impl
/// </summary>
Task <ITargetResult[]> ITargetBuilderCallback.LegacyCallTarget(string[] targets, bool continueOnError, ElementLocation referenceLocation)
{
throw new NotImplementedException();
}
/// <summary>
/// Returns a list of all items in the provided item group whose itemspecs match the specification, after it is split and any wildcards are expanded.
/// If no items match, returns null.
/// </summary>
/// <param name="items">The items to match</param>
/// <param name="specification">The specification to match against the items.</param>
/// <param name="specificationLocation">The specification to match against the provided items</param>
/// <param name="expander">The expander to use</param>
/// <returns>A list of matching items</returns>
private List <ProjectItemInstance> FindItemsMatchingSpecification
(
ICollection <ProjectItemInstance> items,
string specification,
ElementLocation specificationLocation,
Expander <ProjectPropertyInstance, ProjectItemInstance> expander
)
{
if (items.Count == 0 || specification.Length == 0)
{
return(null);
}
// This is a hashtable whose key is the filename for the individual items
// in the Exclude list, after wildcard expansion.
HashSet <string> specificationsToFind = new HashSet <string>(StringComparer.OrdinalIgnoreCase);
// Split by semicolons
var specificationPieces = expander.ExpandIntoStringListLeaveEscaped(specification, ExpanderOptions.ExpandAll, specificationLocation);
foreach (string piece in specificationPieces)
{
// Take each individual path or file expression, and expand any
// wildcards. Then loop through each file returned, and add it
// to our hashtable.
// Don't unescape wildcards just yet - if there were any escaped, the caller wants to treat them
// as literals. Everything else is safe to unescape at this point, since we're only matching
// against the file system.
string[] fileList = _engineFileUtilities.GetFileListEscaped(Project.Directory, piece);
foreach (string file in fileList)
{
// Now unescape everything, because this is the end of the road for this filename.
// We're just going to compare it to the unescaped include path to filter out the
// file excludes.
specificationsToFind.Add(EscapingUtilities.UnescapeAll(file));
}
}
if (specificationsToFind.Count == 0)
{
return(null);
}
// Now loop through our list and filter out any that match a
// filename in the remove list.
List <ProjectItemInstance> itemsRemoved = new List <ProjectItemInstance>();
foreach (ProjectItemInstance item in items)
{
// Even if the case for the excluded files is different, they
// will still get excluded, as expected. However, if the excluded path
// references the same file in a different way, such as by relative
// path instead of absolute path, we will not realize that they refer
// to the same file, and thus we will not exclude it.
if (specificationsToFind.Contains(item.EvaluatedInclude))
{
itemsRemoved.Add(item);
}
}
return(itemsRemoved);
}
/// <summary>
/// Indicates to the TaskHost that it is no longer needed.
/// Called by TaskBuilder when the task using the EngineProxy is done.
/// </summary>
internal void MarkAsInactive()
{
VerifyActiveProxy();
_activeProxy = false;
_loggingContext = null;
_elementLocation = null;
// Clear out the sponsor (who is responsible for keeping the EngineProxy remoting lease alive until the task is done)
// this will be null if the engineproxy was never sent across an appdomain boundry.
if (_sponsor != null)
{
ILease lease = (ILease)RemotingServices.GetLifetimeService(this);
if (lease != null)
{
lease.Unregister(_sponsor);
}
_sponsor.Close();
_sponsor = null;
}
}
/// <summary>
/// Determines how many times the batchable object needs to be executed (each execution is termed a "batch"), and prepares
/// buckets of items to pass to the object in each batch.
/// </summary>
/// <param name="parentNode"></param>
/// <param name="batchableObjectParameters"></param>
/// <param name="lookup"></param>
/// <param name="implicitBatchableItemType">Any item type that can be considered an implicit input to this batchable object.
/// This is useful for items inside targets, where the item name is plainly an item type that's an "input" to the object.</param>
/// <returns>ArrayList containing ItemBucket objects, each one representing an execution batch.</returns>
internal static List<ItemBucket> PrepareBatchingBuckets
(
List<string> batchableObjectParameters,
Lookup lookup,
string implicitBatchableItemType,
ElementLocation elementLocation
)
{
if (batchableObjectParameters == null)
{
ErrorUtilities.ThrowInternalError("Need the parameters of the batchable object to determine if it can be batched.");
}
if (lookup == null)
{
ErrorUtilities.ThrowInternalError("Need to specify the lookup.");
}
ItemsAndMetadataPair pair = ExpressionShredder.GetReferencedItemNamesAndMetadata(batchableObjectParameters);
// All the @(itemname) item list references in the tag, including transforms, etc.
HashSet<string> consumedItemReferences = pair.Items;
// All the %(itemname.metadataname) references in the tag (not counting those embedded
// inside item transforms), and note that the itemname portion is optional.
// The keys in the returned hash table are the qualified metadata names (e.g. "EmbeddedResource.Culture"
// or just "Culture"). The values are MetadataReference structs, which simply split out the item
// name (possibly null) and the actual metadata name.
Dictionary<string, MetadataReference> consumedMetadataReferences = pair.Metadata;
List<ItemBucket> buckets = null;
if (consumedMetadataReferences != null && consumedMetadataReferences.Count > 0)
{
// Add any item types that we were explicitly told to assume.
if (implicitBatchableItemType != null)
{
consumedItemReferences = consumedItemReferences ?? new HashSet<string>(MSBuildNameIgnoreCaseComparer.Default);
consumedItemReferences.Add(implicitBatchableItemType);
}
// This method goes through all the item list references and figures out which ones
// will be participating in batching, and which ones won't. We get back a hashtable
// where the key is the item name that will be participating in batching. The values
// are all String.Empty (not used). This method may return additional item names
// that weren't represented in "consumedItemReferences"... this would happen if there
// were qualified metadata references in the consumedMetadataReferences table, such as
// %(EmbeddedResource.Culture).
Dictionary<string, ICollection<ProjectItemInstance>> itemListsToBeBatched = GetItemListsToBeBatched(consumedMetadataReferences, consumedItemReferences, lookup, elementLocation);
// At this point, if there were any metadata references in the tag, but no item
// references to batch on, we've got a problem because we can't figure out which
// item lists the user wants us to batch.
if (itemListsToBeBatched.Count == 0)
{
foreach (string unqualifiedMetadataName in consumedMetadataReferences.Keys)
{
// Of course, since this throws an exception, there's no way we're ever going
// to really loop here... it's just that the foreach is the only way I can
// figure out how to get data out of the hashtable without knowing any of the
// keys!
ProjectErrorUtilities.VerifyThrowInvalidProject(false,
elementLocation, "CannotReferenceItemMetadataWithoutItemName", unqualifiedMetadataName);
}
}
else
{
// If the batchable object consumes item metadata as well as items to be batched,
// we need to partition the items consumed by the object.
buckets = BucketConsumedItems(lookup, itemListsToBeBatched, consumedMetadataReferences, elementLocation);
}
}
// if the batchable object does not consume any item metadata or items, or if the item lists it consumes are all
// empty, then the object does not need to be batched
if ((buckets == null) || (buckets.Count == 0))
{
// create a default bucket that references the project items and properties -- this way we always have a bucket
buckets = new List<ItemBucket>(1);
buckets.Add(new ItemBucket(null, null, lookup, buckets.Count));
}
return buckets;
}
/// <summary>
/// Invokes the specified targets using Dev9 behavior.
/// </summary>
/// <param name="targets">The targets to build.</param>
/// <param name="continueOnError">True to continue building the remaining targets if one fails.</param>
/// <returns>The results for each target.</returns>
/// <remarks>
/// Dev9 behavior refers to the following:
/// 1. The changes made during the calling target up to this point are NOT visible to this target.
/// 2. The changes made by this target are NOT visible to the calling target.
/// 3. Changes made by the calling target OVERRIDE changes made by this target.
/// </remarks>
async Task<ITargetResult[]> ITargetBuilderCallback.LegacyCallTarget(string[] targets, bool continueOnError, ElementLocation taskLocation)
{
List<TargetSpecification> targetToPush = new List<TargetSpecification>();
ITargetResult[] results = new TargetResult[targets.Length];
bool originalLegacyCallTargetContinueOnError = _legacyCallTargetContinueOnError;
_legacyCallTargetContinueOnError = _legacyCallTargetContinueOnError || continueOnError;
// Our lookup is the one used at the beginning of the calling target.
Lookup callTargetLookup = _baseLookup;
// We now record this lookup in the calling target's entry so that it may
// leave the scope just before it commits its own changes to the base lookup.
TargetEntry currentTargetEntry = _targetsToBuild.Peek();
currentTargetEntry.EnterLegacyCallTargetScope(callTargetLookup);
ITaskBuilder taskBuilder = _componentHost.GetComponent(BuildComponentType.TaskBuilder) as ITaskBuilder;
try
{
// Flag set to true if one of the targets we call fails.
bool errorResult = false;
// Now walk through the list of targets, invoking each one.
for (int i = 0; i < targets.Length; i++)
{
if (_cancellationToken.IsCancellationRequested || errorResult)
{
results[i] = new TargetResult(new TaskItem[] { }, new WorkUnitResult(WorkUnitResultCode.Skipped, WorkUnitActionCode.Continue, null));
}
else
{
targetToPush.Clear();
targetToPush.Add(new TargetSpecification(targets[i], taskLocation));
// We push the targets one at a time to emulate the original CallTarget behavior.
bool pushed = await PushTargets(targetToPush, currentTargetEntry, callTargetLookup, false, true, TargetPushType.Normal);
ErrorUtilities.VerifyThrow(pushed, "Failed to push any targets onto the stack. Target: {0} Current Target: {1}", targets[i], currentTargetEntry.Target.Name);
await ProcessTargetStack(taskBuilder);
if (!_cancellationToken.IsCancellationRequested)
{
results[i] = _buildResult[targets[i]];
if (results[i].ResultCode == TargetResultCode.Failure)
{
errorResult = true;
}
}
else
{
results[i] = new TargetResult(new TaskItem[] { }, new WorkUnitResult(WorkUnitResultCode.Skipped, WorkUnitActionCode.Continue, null));
}
}
}
}
finally
{
// Restore the state of the TargetBuilder to that it was prior to the CallTarget call.
// Any targets we have pushed on at this point we need to get rid of since we aren't going to process them.
// If there were normal task errors, standard error handling semantics would have taken care of them.
// If there was an exception, such as a circular dependency error, items may still be on the stack so we must clear them.
while (!Object.ReferenceEquals(_targetsToBuild.Peek(), currentTargetEntry))
{
_targetsToBuild.Pop();
}
_legacyCallTargetContinueOnError = originalLegacyCallTargetContinueOnError;
((IBuildComponent)taskBuilder).ShutdownComponent();
}
return results;
}
/// <summary>
/// Create an instance of the wrapped ITask for a batch run of the task.
/// </summary>
internal ITask CreateTaskInstance(ElementLocation taskLocation, TaskLoggingContext taskLoggingContext, IBuildComponentHost buildComponentHost, IDictionary<string, string> taskIdentityParameters, AppDomainSetup appDomainSetup, bool isOutOfProc)
{
bool useTaskFactory = false;
IDictionary<string, string> mergedParameters = null;
_taskLoggingContext = taskLoggingContext;
// Optimization for the common (vanilla AssemblyTaskFactory) case -- only calculate
// the task factory parameters if we have any to calculate; otherwise even if we
// still launch the task factory, it will be with parameters corresponding to the
// current process.
if ((_factoryIdentityParameters != null && _factoryIdentityParameters.Count > 0) || (taskIdentityParameters != null && taskIdentityParameters.Count > 0))
{
VerifyThrowIdentityParametersValid(taskIdentityParameters, taskLocation, _taskName, "MSBuildRuntime", "MSBuildArchitecture");
mergedParameters = MergeTaskFactoryParameterSets(_factoryIdentityParameters, taskIdentityParameters);
useTaskFactory = _taskHostFactoryExplicitlyRequested || !TaskHostParametersMatchCurrentProcess(mergedParameters);
}
else
{
// if we don't have any task host parameters specified on either the using task or the
// task invocation, then we will run in-proc UNLESS "TaskHostFactory" is explicitly specified
// as the task factory.
useTaskFactory = _taskHostFactoryExplicitlyRequested;
}
if (useTaskFactory)
{
ErrorUtilities.VerifyThrowInternalNull(buildComponentHost, "buildComponentHost");
mergedParameters = mergedParameters ?? new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
string runtime = null;
string architecture = null;
if (!mergedParameters.TryGetValue(XMakeAttributes.runtime, out runtime))
{
mergedParameters[XMakeAttributes.runtime] = XMakeAttributes.MSBuildRuntimeValues.clr4;
}
if (!mergedParameters.TryGetValue(XMakeAttributes.architecture, out architecture))
{
mergedParameters[XMakeAttributes.architecture] = XMakeAttributes.GetCurrentMSBuildArchitecture();
}
TaskHostTask task = new TaskHostTask(taskLocation, taskLoggingContext, buildComponentHost, mergedParameters, _loadedType, appDomainSetup);
return task;
}
else
{
AppDomain taskAppDomain = null;
ITask taskInstance = TaskLoader.CreateTask(_loadedType, _taskName, taskLocation.File, taskLocation.Line, taskLocation.Column, new TaskLoader.LogError(ErrorLoggingDelegate), appDomainSetup, isOutOfProc, out taskAppDomain);
if (taskAppDomain != null)
{
_tasksAndAppDomains[taskInstance] = taskAppDomain;
}
return taskInstance;
}
}
/// <summary>
/// Of all the item lists that are referenced in this batchable object, which ones should we
/// batch on, and which ones should we just pass in wholesale to every invocation of the
/// target/task?
///
/// Rule #1. If the user has referenced any *qualified* item metadata such as %(EmbeddedResource.Culture),
/// then that item list "EmbeddedResource" will definitely get batched.
///
/// Rule #2. For all the unqualified item metadata such as %(Culture), we make sure that
/// every single item in every single item list being passed into the task contains a value
/// for that metadata. If not, it's an error. If so, we batch all of those item lists.
///
/// All other item lists will not be batched, and instead will be passed in wholesale to all buckets.
/// </summary>
/// <returns>Dictionary containing the item names that should be batched. If the items match unqualified metadata,
/// the entire list of items will be returned in the Value. Otherwise, the Value will be empty, indicating only the
/// qualified item set (in the Key) should be batched.
/// </returns>
private static Dictionary <string, ICollection <ProjectItemInstance> > GetItemListsToBeBatched
(
Dictionary <string, MetadataReference> consumedMetadataReferences, // Key is [string] potentially qualified metadata name
// Value is [struct MetadataReference]
HashSet <string> consumedItemReferenceNames,
Lookup lookup,
ElementLocation elementLocation
)
{
// The keys in this hashtable are the names of the items that we will batch on.
// The values are always String.Empty (not used).
var itemListsToBeBatched = new Dictionary <string, ICollection <ProjectItemInstance> >(MSBuildNameIgnoreCaseComparer.Default);
// Loop through all the metadata references and find the ones that are qualified
// with an item name.
foreach (MetadataReference consumedMetadataReference in consumedMetadataReferences.Values)
{
if (consumedMetadataReference.ItemName != null)
{
// Rule #1. Qualified metadata reference.
// For metadata references that are qualified with an item name
// (e.g., %(EmbeddedResource.Culture) ), we add that item name to the list of
// consumed item names, even if the item name wasn't otherwise referenced via
// @(...) syntax, and even if every item in the list doesn't necessary contain
// a value for this metadata. This is the special power that you get by qualifying
// the metadata reference with an item name.
itemListsToBeBatched[consumedMetadataReference.ItemName] = null;
// Also add this qualified item to the consumed item references list, because
// %(EmbeddedResource.Culture) effectively means that @(EmbeddedResource) is
// being consumed, even though we may not see literally "@(EmbeddedResource)"
// in the tag anywhere. Adding it to this list allows us (down below in this
// method) to check that every item in this list has a value for each
// unqualified metadata reference.
consumedItemReferenceNames ??= new HashSet <string>(MSBuildNameIgnoreCaseComparer.Default);
consumedItemReferenceNames.Add(consumedMetadataReference.ItemName);
}
}
// Loop through all the metadata references and find the ones that are unqualified.
foreach (MetadataReference consumedMetadataReference in consumedMetadataReferences.Values)
{
if (consumedMetadataReference.ItemName == null)
{
// Rule #2. Unqualified metadata reference.
// For metadata references that are unqualified, every single consumed item
// must contain a value for that metadata. If any item doesn't, it's an error
// to use unqualified metadata.
if (consumedItemReferenceNames != null)
{
foreach (string consumedItemName in consumedItemReferenceNames)
{
// Loop through all the items in the item list.
ICollection <ProjectItemInstance> items = lookup.GetItems(consumedItemName);
if (items != null)
{
// Loop through all the items in the BuildItemGroup.
foreach (ProjectItemInstance item in items)
{
ProjectErrorUtilities.VerifyThrowInvalidProject(
item.HasMetadata(consumedMetadataReference.MetadataName),
elementLocation, "ItemDoesNotContainValueForUnqualifiedMetadata",
item.EvaluatedInclude, consumedItemName, consumedMetadataReference.MetadataName);
}
}
// This item list passes the test of having every single item containing
// a value for this metadata. Therefore, add this item list to the batching list.
// Also, to save doing lookup.GetItems again, put the items in the table as the value.
itemListsToBeBatched[consumedItemName] = items;
}
}
}
}
return(itemListsToBeBatched);
}
/// <summary>
/// Partitions the items consumed by the batchable object into buckets, where each bucket contains a set of items that
/// have the same value set on all item metadata consumed by the object.
/// </summary>
/// <remarks>
/// PERF NOTE: Given n items and m batching metadata that produce l buckets, it is usually the case that n > l > m,
/// because a batchable object typically uses one or two item metadata to control batching, and only has a handful of
/// buckets. The number of buckets is typically only large if a batchable object is using single-item batching
/// (where l == n). Any algorithm devised for bucketing therefore, should try to minimize n and l in its complexity
/// equation. The algorithm below has a complexity of O(n*lg(l)*m/2) in its comparisons, and is effectively O(n) when
/// l is small, and O(n*lg(n)) in the worst case as l -> n. However, note that the comparison complexity is not the
/// same as the operational complexity for this algorithm. The operational complexity of this algorithm is actually
/// O(n*m + n*lg(l)*m/2 + n*l/2 + n + l), which is effectively O(n^2) in the worst case. The additional complexity comes
/// from the array and metadata operations that are performed. However, those operations are extremely cheap compared
/// to the comparison operations, which dominate the time spent in this method.
/// </remarks>
/// <returns>List containing ItemBucket objects (can be empty), each one representing an execution batch.</returns>
private static List <ItemBucket> BucketConsumedItems
(
Lookup lookup,
Dictionary <string, ICollection <ProjectItemInstance> > itemListsToBeBatched,
Dictionary <string, MetadataReference> consumedMetadataReferences,
ElementLocation elementLocation
)
{
ErrorUtilities.VerifyThrow(itemListsToBeBatched.Count > 0, "Need item types consumed by the batchable object.");
ErrorUtilities.VerifyThrow(consumedMetadataReferences.Count > 0, "Need item metadata consumed by the batchable object.");
var buckets = new List <ItemBucket>();
// Get and iterate through the list of item names that we're supposed to batch on.
foreach (KeyValuePair <string, ICollection <ProjectItemInstance> > entry in itemListsToBeBatched)
{
string itemName = entry.Key;
// Use the previously-fetched items, if possible
ICollection <ProjectItemInstance> items = entry.Value ?? lookup.GetItems(itemName);
if (items != null)
{
foreach (ProjectItemInstance item in items)
{
// Get this item's values for all the metadata consumed by the batchable object.
Dictionary <string, string> itemMetadataValues = GetItemMetadataValues(item, consumedMetadataReferences, elementLocation);
// put the metadata into a dummy bucket we can use for searching
ItemBucket dummyBucket = ItemBucket.GetDummyBucketForComparisons(itemMetadataValues);
// look through all previously created buckets to find a bucket whose items have the same values as
// this item for all metadata consumed by the batchable object
int matchingBucketIndex = buckets.BinarySearch(dummyBucket);
ItemBucket matchingBucket = (matchingBucketIndex >= 0)
? buckets[matchingBucketIndex]
: null;
// If we didn't find a bucket that matches this item, create a new one, adding
// this item to the bucket.
if (matchingBucket == null)
{
matchingBucket = new ItemBucket(itemListsToBeBatched.Keys, itemMetadataValues, lookup, buckets.Count);
// make sure to put the new bucket into the appropriate location
// in the sorted list as indicated by the binary search
// NOTE: observe the ~ operator (bitwise complement) in front of
// the index -- see MSDN for more information on the return value
// from the List.BinarySearch() method
buckets.Insert(~matchingBucketIndex, matchingBucket);
}
// We already have a bucket for this type of item, so add this item to
// the bucket.
matchingBucket.AddItem(item);
}
}
}
// Put the buckets back in the order in which they were discovered, so that the first
// item declared in the project file ends up in the first batch passed into the target/task.
var orderedBuckets = new List <ItemBucket>(buckets.Count);
for (int i = 0; i < buckets.Count; ++i)
{
orderedBuckets.Add(null);
}
foreach (ItemBucket bucket in buckets)
{
orderedBuckets[bucket.BucketSequenceNumber] = bucket;
}
return(orderedBuckets);
}
/// <summary>
/// Determines how many times the batchable object needs to be executed (each execution is termed a "batch"), and prepares
/// buckets of items to pass to the object in each batch.
/// </summary>
/// <returns>ArrayList containing ItemBucket objects, each one representing an execution batch.</returns>
internal static List<ItemBucket> PrepareBatchingBuckets
(
List<string> batchableObjectParameters,
Lookup lookup,
ElementLocation elementLocation
)
{
return PrepareBatchingBuckets(batchableObjectParameters, lookup, null, elementLocation);
}
/// <summary>
/// Runs all of the tasks for this target, batched as necessary.
/// </summary>
internal async Task ExecuteTarget(ITaskBuilder taskBuilder, BuildRequestEntry requestEntry, ProjectLoggingContext projectLoggingContext, CancellationToken cancellationToken)
{
#if MSBUILDENABLEVSPROFILING
try
{
string beginTargetBuild = String.Format(CultureInfo.CurrentCulture, "Build Target {0} in Project {1} - Start", this.Name, projectFullPath);
DataCollection.CommentMarkProfile(8800, beginTargetBuild);
#endif
try
{
VerifyState(_state, TargetEntryState.Execution);
ErrorUtilities.VerifyThrow(!_isExecuting, "Target {0} is already executing", _target.Name);
_cancellationToken = cancellationToken;
_isExecuting = true;
// Generate the batching buckets. Note that each bucket will get a lookup based on the baseLookup. This lookup will be in its
// own scope, which we will collapse back down into the baseLookup at the bottom of the function.
List <ItemBucket> buckets = BatchingEngine.PrepareBatchingBuckets(GetBatchableParametersForTarget(), _baseLookup, _target.Location);
WorkUnitResult aggregateResult = new WorkUnitResult();
TargetLoggingContext targetLoggingContext = null;
bool targetSuccess = false;
int numberOfBuckets = buckets.Count;
string projectFullPath = requestEntry.RequestConfiguration.ProjectFullPath;
string parentTargetName = null;
if (ParentEntry != null && ParentEntry.Target != null)
{
parentTargetName = ParentEntry.Target.Name;
}
for (int i = 0; i < numberOfBuckets; i++)
{
ItemBucket bucket = buckets[i];
// If one of the buckets failed, stop building.
if (aggregateResult.ActionCode == WorkUnitActionCode.Stop)
{
break;
}
targetLoggingContext = projectLoggingContext.LogTargetBatchStarted(projectFullPath, _target, parentTargetName, _buildReason);
WorkUnitResult bucketResult = null;
targetSuccess = false;
Lookup.Scope entryForInference = null;
Lookup.Scope entryForExecution = null;
try
{
// This isn't really dependency analysis. This is up-to-date checking. Based on this we will be able to determine if we should
// run tasks in inference or execution mode (or both) or just skip them altogether.
ItemDictionary <ProjectItemInstance> changedTargetInputs;
ItemDictionary <ProjectItemInstance> upToDateTargetInputs;
Lookup lookupForInference;
Lookup lookupForExecution;
// UNDONE: (Refactor) Refactor TargetUpToDateChecker to take a logging context, not a logging service.
TargetUpToDateChecker dependencyAnalyzer = new TargetUpToDateChecker(requestEntry.RequestConfiguration.Project, _target, targetLoggingContext.LoggingService, targetLoggingContext.BuildEventContext);
DependencyAnalysisResult dependencyResult = dependencyAnalyzer.PerformDependencyAnalysis(bucket, out changedTargetInputs, out upToDateTargetInputs);
switch (dependencyResult)
{
// UNDONE: Need to enter/leave debugger scope properly for the <Target> element.
case DependencyAnalysisResult.FullBuild:
case DependencyAnalysisResult.IncrementalBuild:
case DependencyAnalysisResult.SkipUpToDate:
// Create the lookups used to hold the current set of properties and items
lookupForInference = bucket.Lookup;
lookupForExecution = bucket.Lookup.Clone();
// Push the lookup stack up one so that we are only modifying items and properties in that scope.
entryForInference = lookupForInference.EnterScope("ExecuteTarget() Inference");
entryForExecution = lookupForExecution.EnterScope("ExecuteTarget() Execution");
// if we're doing an incremental build, we need to effectively run the task twice -- once
// to infer the outputs for up-to-date input items, and once to actually execute the task;
// as a result we need separate sets of item and property collections to track changes
if (dependencyResult == DependencyAnalysisResult.IncrementalBuild)
{
// subset the relevant items to those that are up-to-date
foreach (string itemType in upToDateTargetInputs.ItemTypes)
{
lookupForInference.PopulateWithItems(itemType, upToDateTargetInputs[itemType]);
}
// subset the relevant items to those that have changed
foreach (string itemType in changedTargetInputs.ItemTypes)
{
lookupForExecution.PopulateWithItems(itemType, changedTargetInputs[itemType]);
}
}
// We either have some work to do or at least we need to infer outputs from inputs.
bucketResult = await ProcessBucket(taskBuilder, targetLoggingContext, GetTaskExecutionMode(dependencyResult), lookupForInference, lookupForExecution);
// Now aggregate the result with the existing known results. There are four rules, assuming the target was not
// skipped due to being up-to-date:
// 1. If this bucket failed or was cancelled, the aggregate result is failure.
// 2. If this bucket Succeeded and we have not previously failed, the aggregate result is a success.
// 3. Otherwise, the bucket was skipped, which has no effect on the aggregate result.
// 4. If the bucket's action code says to stop, then we stop, regardless of the success or failure state.
if (dependencyResult != DependencyAnalysisResult.SkipUpToDate)
{
aggregateResult = aggregateResult.AggregateResult(bucketResult);
}
else
{
if (aggregateResult.ResultCode == WorkUnitResultCode.Skipped)
{
aggregateResult = aggregateResult.AggregateResult(new WorkUnitResult(WorkUnitResultCode.Success, WorkUnitActionCode.Continue, null));
}
}
// Pop the lookup scopes, causing them to collapse their values back down into the
// bucket's lookup.
// NOTE: this order is important because when we infer outputs, we are trying
// to produce the same results as would be produced from a full build; as such
// if we're doing both the infer and execute steps, we want the outputs from
// the execute step to override the outputs of the infer step -- this models
// the full build scenario more correctly than if the steps were reversed
entryForInference.LeaveScope();
entryForInference = null;
entryForExecution.LeaveScope();
entryForExecution = null;
targetSuccess = (bucketResult != null) && (bucketResult.ResultCode == WorkUnitResultCode.Success);
break;
case DependencyAnalysisResult.SkipNoInputs:
case DependencyAnalysisResult.SkipNoOutputs:
// We have either no inputs or no outputs, so there is nothing to do.
targetSuccess = true;
break;
}
}
catch (InvalidProjectFileException e)
{
// Make sure the Invalid Project error gets logged *before* TargetFinished. Otherwise,
// the log is confusing.
targetLoggingContext.LogInvalidProjectFileError(e);
if (null != entryForInference)
{
entryForInference.LeaveScope();
}
if (null != entryForExecution)
{
entryForExecution.LeaveScope();
}
aggregateResult = aggregateResult.AggregateResult(new WorkUnitResult(WorkUnitResultCode.Failed, WorkUnitActionCode.Stop, null));
}
finally
{
// Don't log the last target finished event until we can process the target outputs as we want to attach them to the
// last target batch.
if (targetLoggingContext != null && i < numberOfBuckets - 1)
{
targetLoggingContext.LogTargetBatchFinished(projectFullPath, targetSuccess, null);
targetLoggingContext = null;
}
}
}
// Produce the final results.
List <TaskItem> targetOutputItems = new List <TaskItem>();
try
{
// If any legacy CallTarget operations took place, integrate them back in to the main lookup now.
LeaveLegacyCallTargetScopes();
// Publish the items for each bucket back into the baseLookup. Note that EnterScope() was actually called on each
// bucket inside of the ItemBucket constructor, which is why you don't see it anywhere around here.
foreach (ItemBucket bucket in buckets)
{
bucket.LeaveScope();
}
string targetReturns = _target.Returns;
ElementLocation targetReturnsLocation = _target.ReturnsLocation;
// If there are no targets in the project file that use the "Returns" attribute, that means that we
// revert to the legacy behavior in the case where Returns is not specified (null, rather
// than the empty string, which indicates no returns). Legacy behavior is for all
// of the target's Outputs to be returned.
// On the other hand, if there is at least one target in the file that uses the Returns attribute,
// then all targets in the file are run according to the new behaviour (return nothing unless otherwise
// specified by the Returns attribute).
if (targetReturns == null)
{
if (!_target.ParentProjectSupportsReturnsAttribute)
{
targetReturns = _target.Outputs;
targetReturnsLocation = _target.OutputsLocation;
}
}
if (!String.IsNullOrEmpty(targetReturns))
{
// Determine if we should keep duplicates.
bool keepDupes = ConditionEvaluator.EvaluateCondition
(
_target.KeepDuplicateOutputs,
ParserOptions.AllowPropertiesAndItemLists,
_expander,
ExpanderOptions.ExpandPropertiesAndItems,
requestEntry.ProjectRootDirectory,
_target.KeepDuplicateOutputsLocation,
projectLoggingContext.LoggingService,
projectLoggingContext.BuildEventContext
);
// NOTE: we need to gather the outputs in batches, because the output specification may reference item metadata
// Also, we are using the baseLookup, which has possibly had changes made to it since the project started. Because of this, the
// set of outputs calculated here may differ from those which would have been calculated at the beginning of the target. It is
// assumed the user intended this.
List <ItemBucket> batchingBuckets = BatchingEngine.PrepareBatchingBuckets(GetBatchableParametersForTarget(), _baseLookup, _target.Location);
if (keepDupes)
{
foreach (ItemBucket bucket in batchingBuckets)
{
targetOutputItems.AddRange(bucket.Expander.ExpandIntoTaskItemsLeaveEscaped(targetReturns, ExpanderOptions.ExpandAll, targetReturnsLocation));
}
}
else
{
HashSet <TaskItem> addedItems = new HashSet <TaskItem>();
foreach (ItemBucket bucket in batchingBuckets)
{
IList <TaskItem> itemsToAdd = bucket.Expander.ExpandIntoTaskItemsLeaveEscaped(targetReturns, ExpanderOptions.ExpandAll, targetReturnsLocation);
foreach (TaskItem item in itemsToAdd)
{
if (!addedItems.Contains(item))
{
targetOutputItems.Add(item);
addedItems.Add(item);
}
}
}
}
}
}
finally
{
if (targetLoggingContext != null)
{
// log the last target finished since we now have the target outputs.
targetLoggingContext.LogTargetBatchFinished(projectFullPath, targetSuccess, targetOutputItems != null && targetOutputItems.Count > 0 ? targetOutputItems : null);
}
}
_targetResult = new TargetResult(targetOutputItems.ToArray(), aggregateResult);
if (aggregateResult.ResultCode == WorkUnitResultCode.Failed && aggregateResult.ActionCode == WorkUnitActionCode.Stop)
{
_state = TargetEntryState.ErrorExecution;
}
else
{
_state = TargetEntryState.Completed;
}
}
finally
{
_isExecuting = false;
}
#if MSBUILDENABLEVSPROFILING
}
finally
{
string endTargetBuild = String.Format(CultureInfo.CurrentCulture, "Build Target {0} in Project {1} - End", this.Name, projectFullPath);
DataCollection.CommentMarkProfile(8801, endTargetBuild);
}
#endif
}
/// <summary>
/// Gets the values of the specified metadata for the given item.
/// The keys in the dictionary returned may be qualified and/or unqualified, exactly
/// as they are found in the metadata reference.
/// For example if %(x) is found, the key is "x", if %(z.x) is found, the key is "z.x".
/// This dictionary in each bucket is used by Expander to expand exactly the same metadata references, so
/// %(x) is expanded using the key "x", and %(z.x) is expanded using the key "z.x".
/// </summary>
/// <returns>the metadata values</returns>
private static Dictionary<string, string> GetItemMetadataValues
(
ProjectItemInstance item,
Dictionary<string, MetadataReference> consumedMetadataReferences,
ElementLocation elementLocation
)
{
Dictionary<string, string> itemMetadataValues = new Dictionary<string, string>(consumedMetadataReferences.Count, MSBuildNameIgnoreCaseComparer.Default);
foreach (KeyValuePair<string, MetadataReference> consumedMetadataReference in consumedMetadataReferences)
{
string metadataQualifiedName = consumedMetadataReference.Key;
string metadataItemName = consumedMetadataReference.Value.ItemName;
string metadataName = consumedMetadataReference.Value.MetadataName;
if (
(metadataItemName != null) &&
(0 != String.Compare(item.ItemType, metadataItemName, StringComparison.OrdinalIgnoreCase))
)
{
itemMetadataValues[metadataQualifiedName] = String.Empty;
}
else
{
try
{
// This returns String.Empty for both metadata that is undefined and metadata that has
// an empty value; they are treated the same.
itemMetadataValues[metadataQualifiedName] = ((IItem)item).GetMetadataValueEscaped(metadataName);
}
catch (InvalidOperationException e)
{
ProjectErrorUtilities.VerifyThrowInvalidProject(false, elementLocation,
"CannotEvaluateItemMetadata", metadataName, e.Message);
}
}
}
return itemMetadataValues;
}
/// <summary>
/// Partitions the items consumed by the batchable object into buckets, where each bucket contains a set of items that
/// have the same value set on all item metadata consumed by the object.
/// </summary>
/// <remarks>
/// PERF NOTE: Given n items and m batching metadata that produce l buckets, it is usually the case that n > l > m,
/// because a batchable object typically uses one or two item metadata to control batching, and only has a handful of
/// buckets. The number of buckets is typically only large if a batchable object is using single-item batching
/// (where l == n). Any algorithm devised for bucketing therefore, should try to minimize n and l in its complexity
/// equation. The algorithm below has a complexity of O(n*lg(l)*m/2) in its comparisons, and is effectively O(n) when
/// l is small, and O(n*lg(n)) in the worst case as l -> n. However, note that the comparison complexity is not the
/// same as the operational complexity for this algorithm. The operational complexity of this algorithm is actually
/// O(n*m + n*lg(l)*m/2 + n*l/2 + n + l), which is effectively O(n^2) in the worst case. The additional complexity comes
/// from the array and metadata operations that are performed. However, those operations are extremely cheap compared
/// to the comparison operations, which dominate the time spent in this method.
/// </remarks>
/// <returns>ArrayList containing ItemBucket objects (can be empty), each one representing an execution batch.</returns>
private static List<ItemBucket> BucketConsumedItems
(
Lookup lookup,
Dictionary<string, ICollection<ProjectItemInstance>> itemListsToBeBatched,
Dictionary<string, MetadataReference> consumedMetadataReferences,
ElementLocation elementLocation
)
{
ErrorUtilities.VerifyThrow(itemListsToBeBatched.Count > 0, "Need item types consumed by the batchable object.");
ErrorUtilities.VerifyThrow(consumedMetadataReferences.Count > 0, "Need item metadata consumed by the batchable object.");
List<ItemBucket> buckets = new List<ItemBucket>();
// Get and iterate through the list of item names that we're supposed to batch on.
foreach (KeyValuePair<string, ICollection<ProjectItemInstance>> entry in itemListsToBeBatched)
{
string itemName = (string)entry.Key;
// Use the previously-fetched items, if possible
ICollection<ProjectItemInstance> items = entry.Value;
if (items == null)
{
items = lookup.GetItems(itemName);
}
if (items != null)
{
foreach (ProjectItemInstance item in items)
{
// Get this item's values for all the metadata consumed by the batchable object.
Dictionary<string, string> itemMetadataValues = GetItemMetadataValues(item, consumedMetadataReferences, elementLocation);
// put the metadata into a dummy bucket we can use for searching
ItemBucket dummyBucket = ItemBucket.GetDummyBucketForComparisons(itemMetadataValues);
// look through all previously created buckets to find a bucket whose items have the same values as
// this item for all metadata consumed by the batchable object
int matchingBucketIndex = buckets.BinarySearch(dummyBucket);
ItemBucket matchingBucket = (matchingBucketIndex >= 0)
? (ItemBucket)buckets[matchingBucketIndex]
: null;
// If we didn't find a bucket that matches this item, create a new one, adding
// this item to the bucket.
if (null == matchingBucket)
{
matchingBucket = new ItemBucket(itemListsToBeBatched.Keys, itemMetadataValues, lookup, buckets.Count);
// make sure to put the new bucket into the appropriate location
// in the sorted list as indicated by the binary search
// NOTE: observe the ~ operator (bitwise complement) in front of
// the index -- see MSDN for more information on the return value
// from the ArrayList.BinarySearch() method
buckets.Insert(~matchingBucketIndex, matchingBucket);
}
// We already have a bucket for this type of item, so add this item to
// the bucket.
matchingBucket.AddItem(item);
}
}
}
// Put the buckets back in the order in which they were discovered, so that the first
// item declared in the project file ends up in the first batch passed into the target/task.
List<ItemBucket> orderedBuckets = new List<ItemBucket>(buckets.Count);
for (int i = 0; i < buckets.Count; ++i)
{
orderedBuckets.Add(null);
}
foreach (ItemBucket bucket in buckets)
{
orderedBuckets[bucket.BucketSequenceNumber] = bucket;
}
return orderedBuckets;
}
/// <summary>
/// Of all the item lists that are referenced in this batchable object, which ones should we
/// batch on, and which ones should we just pass in wholesale to every invocation of the
/// target/task?
///
/// Rule #1. If the user has referenced any *qualified* item metadata such as %(EmbeddedResource.Culture),
/// then that item list "EmbeddedResource" will definitely get batched.
///
/// Rule #2. For all the unqualified item metadata such as %(Culture), we make sure that
/// every single item in every single item list being passed into the task contains a value
/// for that metadata. If not, it's an error. If so, we batch all of those item lists.
///
/// All other item lists will not be batched, and instead will be passed in wholesale to all buckets.
/// </summary>
/// <returns>Dictionary containing the item names that should be batched. If the items match unqualified metadata,
/// the entire list of items will be returned in the Value. Otherwise, the Value will be empty, indicating only the
/// qualified item set (in the Key) should be batched.
/// </returns>
private static Dictionary<string, ICollection<ProjectItemInstance>> GetItemListsToBeBatched
(
Dictionary<string, MetadataReference> consumedMetadataReferences, // Key is [string] potentially qualified metadata name
// Value is [struct MetadataReference]
HashSet<string> consumedItemReferenceNames,
Lookup lookup,
ElementLocation elementLocation
)
{
// The keys in this hashtable are the names of the items that we will batch on.
// The values are always String.Empty (not used).
Dictionary<string, ICollection<ProjectItemInstance>> itemListsToBeBatched = new Dictionary<string, ICollection<ProjectItemInstance>>(MSBuildNameIgnoreCaseComparer.Default);
// Loop through all the metadata references and find the ones that are qualified
// with an item name.
foreach (MetadataReference consumedMetadataReference in consumedMetadataReferences.Values)
{
if (consumedMetadataReference.ItemName != null)
{
// Rule #1. Qualified metadata reference.
// For metadata references that are qualified with an item name
// (e.g., %(EmbeddedResource.Culture) ), we add that item name to the list of
// consumed item names, even if the item name wasn't otherwise referenced via
// @(...) syntax, and even if every item in the list doesn't necessary contain
// a value for this metadata. This is the special power that you get by qualifying
// the metadata reference with an item name.
itemListsToBeBatched[consumedMetadataReference.ItemName] = null;
// Also add this qualified item to the consumed item references list, because
// %(EmbeddedResource.Culture) effectively means that @(EmbeddedResource) is
// being consumed, even though we may not see literally "@(EmbeddedResource)"
// in the tag anywhere. Adding it to this list allows us (down below in this
// method) to check that every item in this list has a value for each
// unqualified metadata reference.
consumedItemReferenceNames = consumedItemReferenceNames ?? new HashSet<string>(MSBuildNameIgnoreCaseComparer.Default);
consumedItemReferenceNames.Add(consumedMetadataReference.ItemName);
}
}
// Loop through all the metadata references and find the ones that are unqualified.
foreach (MetadataReference consumedMetadataReference in consumedMetadataReferences.Values)
{
if (consumedMetadataReference.ItemName == null)
{
// Rule #2. Unqualified metadata reference.
// For metadata references that are unqualified, every single consumed item
// must contain a value for that metadata. If any item doesn't, it's an error
// to use unqualified metadata.
if (consumedItemReferenceNames != null)
{
foreach (string consumedItemName in consumedItemReferenceNames)
{
// Loop through all the items in the item list.
ICollection<ProjectItemInstance> items = lookup.GetItems(consumedItemName);
if (items != null)
{
// Loop through all the items in the BuildItemGroup.
foreach (ProjectItemInstance item in items)
{
ProjectErrorUtilities.VerifyThrowInvalidProject(
item.HasMetadata(consumedMetadataReference.MetadataName),
elementLocation, "ItemDoesNotContainValueForUnqualifiedMetadata",
item.EvaluatedInclude, consumedItemName, consumedMetadataReference.MetadataName);
}
}
// This item list passes the test of having every single item containing
// a value for this metadata. Therefore, add this item list to the batching list.
// Also, to save doing lookup.GetItems again, put the items in the table as the value.
itemListsToBeBatched[consumedItemName] = items;
}
}
}
}
return itemListsToBeBatched;
}
/// <summary>
/// Pushes the list of targets specified onto the target stack in reverse order specified, so that
/// they will be built in the order specified.
/// </summary>
/// <param name="targets">List of targets to build.</param>
/// <param name="parentTargetEntry">The target which should be considered the parent of these targets.</param>
/// <param name="baseLookup">The lookup to be used to build these targets.</param>
/// <param name="addAsErrorTarget">True if this should be considered an error target.</param>
/// <param name="stopProcessingOnCompletion">True if target stack processing should terminate when the last target in the list is processed.</param>
/// <param name="buildReason">The reason the target is being built by the parent.</param>
/// <returns>True if we actually pushed any targets, false otherwise.</returns>
private async Task <bool> PushTargets(IList <TargetSpecification> targets, TargetEntry parentTargetEntry, Lookup baseLookup, bool addAsErrorTarget, bool stopProcessingOnCompletion, TargetBuiltReason buildReason)
{
List <TargetEntry> targetsToPush = new List <TargetEntry>(targets.Count);
// Iterate the list in reverse order so that the first target in the list is the last pushed, and thus the first to be executed.
for (int i = targets.Count - 1; i >= 0; i--)
{
TargetSpecification targetSpecification = targets[i];
if (buildReason == TargetBuiltReason.BeforeTargets || buildReason == TargetBuiltReason.AfterTargets)
{
// Don't build any Before or After targets for which we already have results. Unlike other targets,
// we don't explicitly log a skipped-with-results message because it is not interesting.
if (_buildResult.HasResultsForTarget(targetSpecification.TargetName))
{
if (_buildResult[targetSpecification.TargetName].ResultCode != TargetResultCode.Skipped)
{
continue;
}
}
}
ElementLocation targetLocation = targetSpecification.ReferenceLocation;
// See if this target is already building under a different build request. If so, we need to wait.
int idOfAlreadyBuildingRequest = BuildRequest.InvalidGlobalRequestId;
if (_requestEntry.RequestConfiguration.ActivelyBuildingTargets.TryGetValue(targetSpecification.TargetName, out idOfAlreadyBuildingRequest))
{
if (idOfAlreadyBuildingRequest != _requestEntry.Request.GlobalRequestId)
{
// Another request elsewhere is building it. We need to wait.
await _requestBuilderCallback.BlockOnTargetInProgress(idOfAlreadyBuildingRequest, targetSpecification.TargetName, null);
// If we come out of here and the target is *still* active, it means the scheduler detected a circular dependency and told us to
// continue so we could throw the exception.
if (_requestEntry.RequestConfiguration.ActivelyBuildingTargets.ContainsKey(targetSpecification.TargetName))
{
ProjectErrorUtilities.ThrowInvalidProject(targetLocation, "CircularDependency", targetSpecification.TargetName);
}
}
else
{
if (buildReason == TargetBuiltReason.AfterTargets)
{
// If the target we are pushing is supposed to run after the current target and it is already set to run after us then skip adding it now.
continue;
}
// We are already building this target on this request. That's a circular dependency.
ProjectErrorUtilities.ThrowInvalidProject(targetLocation, "CircularDependency", targetSpecification.TargetName);
}
}
else
{
// Does this target exist in our direct parent chain, if it is a before target (since these can cause circular dependency issues)
if (buildReason == TargetBuiltReason.BeforeTargets || buildReason == TargetBuiltReason.DependsOn || buildReason == TargetBuiltReason.None)
{
if (HasCircularDependenceInTargets(parentTargetEntry, targetSpecification, out List <string> targetDependenceChain))
{
ProjectErrorUtilities.ThrowInvalidProject(targetLocation, "CircularDependencyInTargetGraph", targetSpecification.TargetName, parentTargetEntry.Name, buildReason, targetSpecification.TargetName, string.Join("<-", targetDependenceChain));
}
}
else
{
// For an after target, if it is already ANYWHERE on the stack, we don't need to push it because it is already going to run
// after whatever target is causing it to be pushed now.
bool alreadyPushed = false;
foreach (TargetEntry entry in _targetsToBuild)
{
if (String.Equals(entry.Name, targetSpecification.TargetName, StringComparison.OrdinalIgnoreCase))
{
alreadyPushed = true;
break;
}
}
if (alreadyPushed)
{
continue;
}
}
}
// Add to the list of targets to push. We don't actually put it on the stack here because we could run into a circular dependency
// during this loop, in which case the target stack would be out of whack.
TargetEntry newEntry = new TargetEntry(_requestEntry, this as ITargetBuilderCallback, targetSpecification, baseLookup, parentTargetEntry, buildReason, _componentHost, stopProcessingOnCompletion);
newEntry.ErrorTarget = addAsErrorTarget;
targetsToPush.Add(newEntry);
stopProcessingOnCompletion = false; // The first target on the stack (the last one to be run) always inherits the stopProcessing flag.
}
// Now push the targets since this operation cannot fail.
foreach (TargetEntry targetToPush in targetsToPush)
{
_targetsToBuild.Push(targetToPush);
}
bool pushedTargets = (targetsToPush.Count > 0);
return(pushedTargets);
}
/// <summary>
/// Determines how many times the batchable object needs to be executed (each execution is termed a "batch"), and prepares
/// buckets of items to pass to the object in each batch.
/// </summary>
/// <param name="elementLocation"></param>
/// <param name="batchableObjectParameters"></param>
/// <param name="lookup"></param>
/// <param name="implicitBatchableItemType">Any item type that can be considered an implicit input to this batchable object.
/// This is useful for items inside targets, where the item name is plainly an item type that's an "input" to the object.</param>
/// <returns>List containing ItemBucket objects, each one representing an execution batch.</returns>
internal static List <ItemBucket> PrepareBatchingBuckets
(
List <string> batchableObjectParameters,
Lookup lookup,
string implicitBatchableItemType,
ElementLocation elementLocation
)
{
if (batchableObjectParameters == null)
{
ErrorUtilities.ThrowInternalError("Need the parameters of the batchable object to determine if it can be batched.");
}
if (lookup == null)
{
ErrorUtilities.ThrowInternalError("Need to specify the lookup.");
}
ItemsAndMetadataPair pair = ExpressionShredder.GetReferencedItemNamesAndMetadata(batchableObjectParameters);
// All the @(itemname) item list references in the tag, including transforms, etc.
HashSet <string> consumedItemReferences = pair.Items;
// All the %(itemname.metadataname) references in the tag (not counting those embedded
// inside item transforms), and note that the itemname portion is optional.
// The keys in the returned hash table are the qualified metadata names (e.g. "EmbeddedResource.Culture"
// or just "Culture"). The values are MetadataReference structs, which simply split out the item
// name (possibly null) and the actual metadata name.
Dictionary <string, MetadataReference> consumedMetadataReferences = pair.Metadata;
List <ItemBucket> buckets = null;
if (consumedMetadataReferences?.Count > 0)
{
// Add any item types that we were explicitly told to assume.
if (implicitBatchableItemType != null)
{
consumedItemReferences ??= new HashSet <string>(MSBuildNameIgnoreCaseComparer.Default);
consumedItemReferences.Add(implicitBatchableItemType);
}
// This method goes through all the item list references and figures out which ones
// will be participating in batching, and which ones won't. We get back a hashtable
// where the key is the item name that will be participating in batching. The values
// are all String.Empty (not used). This method may return additional item names
// that weren't represented in "consumedItemReferences"... this would happen if there
// were qualified metadata references in the consumedMetadataReferences table, such as
// %(EmbeddedResource.Culture).
Dictionary <string, ICollection <ProjectItemInstance> > itemListsToBeBatched = GetItemListsToBeBatched(consumedMetadataReferences, consumedItemReferences, lookup, elementLocation);
// At this point, if there were any metadata references in the tag, but no item
// references to batch on, we've got a problem because we can't figure out which
// item lists the user wants us to batch.
if (itemListsToBeBatched.Count == 0)
{
foreach (string unqualifiedMetadataName in consumedMetadataReferences.Keys)
{
// Of course, since this throws an exception, there's no way we're ever going
// to really loop here... it's just that the foreach is the only way I can
// figure out how to get data out of the hashtable without knowing any of the
// keys!
ProjectErrorUtilities.ThrowInvalidProject(elementLocation, "CannotReferenceItemMetadataWithoutItemName", unqualifiedMetadataName);
}
}
else
{
// If the batchable object consumes item metadata as well as items to be batched,
// we need to partition the items consumed by the object.
buckets = BucketConsumedItems(lookup, itemListsToBeBatched, consumedMetadataReferences, elementLocation);
}
}
// if the batchable object does not consume any item metadata or items, or if the item lists it consumes are all
// empty, then the object does not need to be batched
if ((buckets == null) || (buckets.Count == 0))
{
// create a default bucket that references the project items and properties -- this way we always have a bucket
buckets = new List <ItemBucket>(1);
buckets.Add(new ItemBucket(null, null, lookup, buckets.Count));
}
return(buckets);
}
//
// Main entry point for parser.
// You pass in the expression you want to parse, and you get an
// ExpressionTree out the back end.
//
internal GenericExpressionNode Parse(string expression, ParserOptions optionSettings, ElementLocation elementLocation)
{
// We currently have no support (and no scenarios) for disallowing property references
// in Conditions.
ErrorUtilities.VerifyThrow(0 != (optionSettings & ParserOptions.AllowProperties),
"Properties should always be allowed.");
_options = optionSettings;
_elementLocation = elementLocation;
_lexer = new Scanner(expression, _options);
if (!_lexer.Advance())
{
errorPosition = _lexer.GetErrorPosition();
ProjectErrorUtilities.VerifyThrowInvalidProject(false, elementLocation, _lexer.GetErrorResource(), expression, errorPosition, _lexer.UnexpectedlyFound);
}
GenericExpressionNode node = Expr(expression);
if (!_lexer.IsNext(Token.TokenType.EndOfInput))
{
errorPosition = _lexer.GetErrorPosition();
ProjectErrorUtilities.VerifyThrowInvalidProject(false, elementLocation, "UnexpectedTokenInCondition", expression, _lexer.IsNextString(), errorPosition);
}
return node;
}
internal GenericExpressionNode Parse(string expression, ParserOptions optionSettings, ElementLocation elementLocation)
{
// We currently have no support (and no scenarios) for disallowing property references
// in Conditions.
ErrorUtilities.VerifyThrow(0 != (optionSettings & ParserOptions.AllowProperties),
"Properties should always be allowed.");
_options = optionSettings;
_elementLocation = elementLocation;
_lexer = new Scanner(expression, _options);
if (!_lexer.Advance())
{
errorPosition = _lexer.GetErrorPosition();
ProjectErrorUtilities.ThrowInvalidProject(elementLocation, _lexer.GetErrorResource(), expression, errorPosition, _lexer.UnexpectedlyFound);
}
GenericExpressionNode node = Expr(expression);
if (!_lexer.IsNext(Token.TokenType.EndOfInput))
{
errorPosition = _lexer.GetErrorPosition();
ProjectErrorUtilities.ThrowInvalidProject(elementLocation, "UnexpectedTokenInCondition", expression, _lexer.IsNextString(), errorPosition);
}
return(node);
}
/// <summary>
/// Initialize the factory from the task registry
/// </summary>
internal LoadedType InitializeFactory
(
AssemblyLoadInfo loadInfo,
string taskName,
IDictionary<string, TaskPropertyInfo> taskParameters,
string taskElementContents,
IDictionary<string, string> taskFactoryIdentityParameters,
bool taskHostFactoryExplicitlyRequested,
TargetLoggingContext targetLoggingContext,
ElementLocation elementLocation,
string taskProjectFile
)
{
ErrorUtilities.VerifyThrowArgumentNull(loadInfo, "loadInfo");
VerifyThrowIdentityParametersValid(taskFactoryIdentityParameters, elementLocation, taskName, "Runtime", "Architecture");
if (taskFactoryIdentityParameters != null)
{
_factoryIdentityParameters = new Dictionary<string, string>(taskFactoryIdentityParameters, StringComparer.OrdinalIgnoreCase);
}
_taskHostFactoryExplicitlyRequested = taskHostFactoryExplicitlyRequested;
try
{
ErrorUtilities.VerifyThrowArgumentLength(taskName, "taskName");
_taskName = taskName;
_loadedType = _typeLoader.Load(taskName, loadInfo);
ProjectErrorUtilities.VerifyThrowInvalidProject(_loadedType != null, elementLocation, "TaskLoadFailure", taskName, loadInfo.AssemblyLocation, String.Empty);
}
catch (TargetInvocationException e)
{
// Exception thrown by the called code itself
// Log the stack, so the task vendor can fix their code
ProjectErrorUtilities.VerifyThrowInvalidProject(false, elementLocation, "TaskLoadFailure", taskName, loadInfo.AssemblyLocation, Environment.NewLine + e.InnerException.ToString());
}
catch (ReflectionTypeLoadException e)
{
// ReflectionTypeLoadException.LoaderExceptions may contain nulls
foreach (Exception exception in e.LoaderExceptions)
{
if (exception != null)
{
targetLoggingContext.LogError(new BuildEventFileInfo(taskProjectFile), "TaskLoadFailure", taskName, loadInfo.AssemblyLocation, exception.Message);
}
}
ProjectErrorUtilities.VerifyThrowInvalidProject(false, elementLocation, "TaskLoadFailure", taskName, loadInfo.AssemblyLocation, e.Message);
}
catch (ArgumentNullException e)
{
// taskName may be null
ProjectErrorUtilities.VerifyThrowInvalidProject(false, elementLocation, "TaskLoadFailure", taskName, loadInfo.AssemblyLocation, e.Message);
}
catch (Exception e) // Catching Exception, but rethrowing unless it's a well-known exception.
{
if (ExceptionHandling.NotExpectedReflectionException(e))
{
throw;
}
ProjectErrorUtilities.VerifyThrowInvalidProject(false, elementLocation, "TaskLoadFailure", taskName, loadInfo.AssemblyLocation, e.Message);
}
return _loadedType;
}
/// <summary>
/// Returns a list of all items in the provided item group whose itemspecs match the specification, after it is split and any wildcards are expanded.
/// If no items match, returns null.
/// </summary>
/// <param name="items">The items to match</param>
/// <param name="specification">The specification to match against the items.</param>
/// <param name="specificationLocation">The specification to match against the provided items</param>
/// <param name="expander">The expander to use</param>
/// <returns>A list of matching items</returns>
private List<ProjectItemInstance> FindItemsMatchingSpecification
(
ICollection<ProjectItemInstance> items,
string specification,
ElementLocation specificationLocation,
Expander<ProjectPropertyInstance, ProjectItemInstance> expander
)
{
if (items.Count == 0 || specification.Length == 0)
{
return null;
}
// This is a hashtable whose key is the filename for the individual items
// in the Exclude list, after wildcard expansion.
HashSet<string> specificationsToFind = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
// Split by semicolons
IList<string> specificationPieces = expander.ExpandIntoStringListLeaveEscaped(specification, ExpanderOptions.ExpandAll, specificationLocation);
foreach (string piece in specificationPieces)
{
// Take each individual path or file expression, and expand any
// wildcards. Then loop through each file returned, and add it
// to our hashtable.
// Don't unescape wildcards just yet - if there were any escaped, the caller wants to treat them
// as literals. Everything else is safe to unescape at this point, since we're only matching
// against the file system.
string[] fileList = EngineFileUtilities.GetFileListEscaped(Project.Directory, piece);
foreach (string file in fileList)
{
// Now unescape everything, because this is the end of the road for this filename.
// We're just going to compare it to the unescaped include path to filter out the
// file excludes.
specificationsToFind.Add(EscapingUtilities.UnescapeAll(file));
}
}
if (specificationsToFind.Count == 0)
{
return null;
}
// Now loop through our list and filter out any that match a
// filename in the remove list.
List<ProjectItemInstance> itemsRemoved = new List<ProjectItemInstance>();
foreach (ProjectItemInstance item in items)
{
// Even if the case for the excluded files is different, they
// will still get excluded, as expected. However, if the excluded path
// references the same file in a different way, such as by relative
// path instead of absolute path, we will not realize that they refer
// to the same file, and thus we will not exclude it.
if (specificationsToFind.Contains(item.EvaluatedInclude))
{
itemsRemoved.Add(item);
}
}
return itemsRemoved;
}
/// <summary>
/// Is the given task name able to be created by the task factory. In the case of an assembly task factory
/// this question is answered by checking the assembly wrapped by the task factory to see if it exists.
/// </summary>
internal bool TaskNameCreatableByFactory(string taskName, IDictionary<string, string> taskIdentityParameters, string taskProjectFile, TargetLoggingContext targetLoggingContext, ElementLocation elementLocation)
{
if (!TaskIdentityParametersMatchFactory(_factoryIdentityParameters, taskIdentityParameters))
{
return false;
}
// Parameters match, so now we check to see if the task exists.
LoadedType taskClass = null;
try
{
ErrorUtilities.VerifyThrowArgumentLength(taskName, "TaskName");
taskClass = _typeLoader.ReflectionOnlyLoad(taskName, _loadedType.Assembly);
if (taskClass != null)
{
return true;
}
else
{
return false;
}
}
catch (TargetInvocationException e)
{
// Exception thrown by the called code itself
// Log the stack, so the task vendor can fix their code
ProjectErrorUtilities.ThrowInvalidProject(elementLocation, "TaskLoadFailure", taskName, _loadedType.Assembly.AssemblyLocation, Environment.NewLine + e.InnerException.ToString());
}
catch (ReflectionTypeLoadException e)
{
// ReflectionTypeLoadException.LoaderExceptions may contain nulls
foreach (Exception exception in e.LoaderExceptions)
{
if (exception != null)
{
targetLoggingContext.LogError(new BuildEventFileInfo(taskProjectFile), "TaskLoadFailure", taskName, _loadedType.Assembly.AssemblyLocation, exception.Message);
}
}
ProjectErrorUtilities.ThrowInvalidProject(elementLocation, "TaskLoadFailure", taskName, _loadedType.Assembly.AssemblyLocation, e.Message);
}
catch (ArgumentNullException e)
{
// taskName may be null
ProjectErrorUtilities.ThrowInvalidProject(elementLocation, "TaskLoadFailure", taskName, _loadedType.Assembly.AssemblyLocation, e.Message);
}
catch (Exception e) // Catching Exception, but rethrowing unless it's a well-known exception.
{
if (ExceptionHandling.NotExpectedReflectionException(e))
{
throw;
}
ProjectErrorUtilities.ThrowInvalidProject(elementLocation, "TaskLoadFailure", taskName, _loadedType.Assembly.AssemblyLocation, e.Message);
}
return false;
}
/// <summary>
/// Create an instance of the wrapped ITask for a batch run of the task.
/// </summary>
internal ITask CreateTaskInstance(ElementLocation taskLocation, TaskLoggingContext taskLoggingContext, IBuildComponentHost buildComponentHost, IDictionary <string, string> taskIdentityParameters,
#if FEATURE_APPDOMAIN
AppDomainSetup appDomainSetup,
#endif
bool isOutOfProc)
{
bool useTaskFactory = false;
IDictionary <string, string> mergedParameters = null;
_taskLoggingContext = taskLoggingContext;
// Optimization for the common (vanilla AssemblyTaskFactory) case -- only calculate
// the task factory parameters if we have any to calculate; otherwise even if we
// still launch the task factory, it will be with parameters corresponding to the
// current process.
if ((_factoryIdentityParameters?.Count > 0) || (taskIdentityParameters?.Count > 0))
{
VerifyThrowIdentityParametersValid(taskIdentityParameters, taskLocation, _taskName, "MSBuildRuntime", "MSBuildArchitecture");
mergedParameters = MergeTaskFactoryParameterSets(_factoryIdentityParameters, taskIdentityParameters);
useTaskFactory = !NativeMethodsShared.IsMono &&
(_taskHostFactoryExplicitlyRequested ||
!TaskHostParametersMatchCurrentProcess(mergedParameters));
}
else
{
// if we don't have any task host parameters specified on either the using task or the
// task invocation, then we will run in-proc UNLESS "TaskHostFactory" is explicitly specified
// as the task factory.
useTaskFactory = _taskHostFactoryExplicitlyRequested;
}
if (useTaskFactory)
{
ErrorUtilities.VerifyThrowInternalNull(buildComponentHost, nameof(buildComponentHost));
mergedParameters ??= new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
string runtime = null;
string architecture = null;
if (!mergedParameters.TryGetValue(XMakeAttributes.runtime, out runtime))
{
mergedParameters[XMakeAttributes.runtime] = XMakeAttributes.MSBuildRuntimeValues.clr4;
}
if (!mergedParameters.TryGetValue(XMakeAttributes.architecture, out architecture))
{
mergedParameters[XMakeAttributes.architecture] = XMakeAttributes.GetCurrentMSBuildArchitecture();
}
TaskHostTask task = new TaskHostTask(taskLocation, taskLoggingContext, buildComponentHost, mergedParameters, _loadedType
#if FEATURE_APPDOMAIN
, appDomainSetup
#endif
);
return(task);
}
else
{
#if FEATURE_APPDOMAIN
AppDomain taskAppDomain = null;
#endif
ITask taskInstance = TaskLoader.CreateTask(_loadedType, _taskName, taskLocation.File, taskLocation.Line, taskLocation.Column, new TaskLoader.LogError(ErrorLoggingDelegate)
#if FEATURE_APPDOMAIN
, appDomainSetup
#endif
, isOutOfProc
#if FEATURE_APPDOMAIN
, out taskAppDomain
#endif
);
#if FEATURE_APPDOMAIN
if (taskAppDomain != null)
{
_tasksAndAppDomains[taskInstance] = taskAppDomain;
}
#endif
return(taskInstance);
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="host">The component host</param>
/// <param name="requestEntry">The build request entry</param>
public TaskHost(IBuildComponentHost host, BuildRequestEntry requestEntry, ElementLocation taskLocation, ITargetBuilderCallback targetBuilderCallback)
{
ErrorUtilities.VerifyThrowArgumentNull(host, "host");
ErrorUtilities.VerifyThrowArgumentNull(requestEntry, "requestEntry");
ErrorUtilities.VerifyThrowInternalNull(taskLocation, "taskLocation");
_host = host;
_requestEntry = requestEntry;
_taskLocation = taskLocation;
_targetBuilderCallback = targetBuilderCallback;
_continueOnError = false;
_activeProxy = true;
_callbackMonitor = new Object();
}
/// <summary>
/// Is the given task name able to be created by the task factory. In the case of an assembly task factory
/// this question is answered by checking the assembly wrapped by the task factory to see if it exists.
/// </summary>
internal bool TaskNameCreatableByFactory(string taskName, IDictionary <string, string> taskIdentityParameters, string taskProjectFile, TargetLoggingContext targetLoggingContext, ElementLocation elementLocation)
{
if (!TaskIdentityParametersMatchFactory(_factoryIdentityParameters, taskIdentityParameters))
{
return(false);
}
try
{
ErrorUtilities.VerifyThrowArgumentLength(taskName, "TaskName");
// Parameters match, so now we check to see if the task exists.
return(_typeLoader.ReflectionOnlyLoad(taskName, _loadedType.Assembly) != null);
}
catch (TargetInvocationException e)
{
// Exception thrown by the called code itself
// Log the stack, so the task vendor can fix their code
ProjectErrorUtilities.ThrowInvalidProject(elementLocation, "TaskLoadFailure", taskName, _loadedType.Assembly.AssemblyLocation, Environment.NewLine + e.InnerException.ToString());
}
catch (ReflectionTypeLoadException e)
{
// ReflectionTypeLoadException.LoaderExceptions may contain nulls
foreach (Exception exception in e.LoaderExceptions)
{
if (exception != null)
{
targetLoggingContext.LogError(new BuildEventFileInfo(taskProjectFile), "TaskLoadFailure", taskName, _loadedType.Assembly.AssemblyLocation, exception.Message);
}
}
ProjectErrorUtilities.ThrowInvalidProject(elementLocation, "TaskLoadFailure", taskName, _loadedType.Assembly.AssemblyLocation, e.Message);
}
catch (ArgumentNullException e)
{
// taskName may be null
ProjectErrorUtilities.ThrowInvalidProject(elementLocation, "TaskLoadFailure", taskName, _loadedType.Assembly.AssemblyLocation, e.Message);
}
catch (Exception e) // Catching Exception, but rethrowing unless it's a well-known exception.
{
if (ExceptionHandling.NotExpectedReflectionException(e))
{
throw;
}
ProjectErrorUtilities.ThrowInvalidProject(elementLocation, "TaskLoadFailure", taskName, _loadedType.Assembly.AssemblyLocation, e.Message);
}
return(false);
}
/// <summary>
/// Empty impl
/// </summary>
Task<ITargetResult[]> ITargetBuilderCallback.LegacyCallTarget(string[] targets, bool continueOnError, ElementLocation referenceLocation)
{
throw new NotImplementedException();
}
/// <summary>
/// Initialize the factory from the task registry
/// </summary>
internal LoadedType InitializeFactory
(
AssemblyLoadInfo loadInfo,
string taskName,
IDictionary <string, TaskPropertyInfo> taskParameters,
string taskElementContents,
IDictionary <string, string> taskFactoryIdentityParameters,
bool taskHostFactoryExplicitlyRequested,
TargetLoggingContext targetLoggingContext,
ElementLocation elementLocation,
string taskProjectFile
)
{
ErrorUtilities.VerifyThrowArgumentNull(loadInfo, nameof(loadInfo));
VerifyThrowIdentityParametersValid(taskFactoryIdentityParameters, elementLocation, taskName, "Runtime", "Architecture");
if (taskFactoryIdentityParameters != null)
{
_factoryIdentityParameters = new Dictionary <string, string>(taskFactoryIdentityParameters, StringComparer.OrdinalIgnoreCase);
}
_taskHostFactoryExplicitlyRequested = taskHostFactoryExplicitlyRequested;
try
{
ErrorUtilities.VerifyThrowArgumentLength(taskName, nameof(taskName));
_taskName = taskName;
_loadedType = _typeLoader.Load(taskName, loadInfo);
ProjectErrorUtilities.VerifyThrowInvalidProject(_loadedType != null, elementLocation, "TaskLoadFailure", taskName, loadInfo.AssemblyLocation, String.Empty);
}
catch (TargetInvocationException e)
{
// Exception thrown by the called code itself
// Log the stack, so the task vendor can fix their code
ProjectErrorUtilities.VerifyThrowInvalidProject(false, elementLocation, "TaskLoadFailure", taskName, loadInfo.AssemblyLocation, Environment.NewLine + e.InnerException.ToString());
}
catch (ReflectionTypeLoadException e)
{
// ReflectionTypeLoadException.LoaderExceptions may contain nulls
foreach (Exception exception in e.LoaderExceptions)
{
if (exception != null)
{
targetLoggingContext.LogError(new BuildEventFileInfo(taskProjectFile), "TaskLoadFailure", taskName, loadInfo.AssemblyLocation, exception.Message);
}
}
ProjectErrorUtilities.VerifyThrowInvalidProject(false, elementLocation, "TaskLoadFailure", taskName, loadInfo.AssemblyLocation, e.Message);
}
catch (ArgumentNullException e)
{
// taskName may be null
ProjectErrorUtilities.VerifyThrowInvalidProject(false, elementLocation, "TaskLoadFailure", taskName, loadInfo.AssemblyLocation, e.Message);
}
catch (Exception e) // Catching Exception, but rethrowing unless it's a well-known exception.
{
if (ExceptionHandling.NotExpectedReflectionException(e))
{
throw;
}
ProjectErrorUtilities.VerifyThrowInvalidProject(false, elementLocation, "TaskLoadFailure", taskName, loadInfo.AssemblyLocation, e.Message);
}
return(_loadedType);
}