private void ProcessMetadataElements(ProjectItemElement itemElement, OperationBuilderWithMetadata operationBuilder)
{
if (itemElement.HasMetadata)
{
operationBuilder.Metadata.AddRange(itemElement.Metadata);
var values = new List <string>(itemElement.Metadata.Count * 2);
// Expand properties here, because a property may have a value which is an item reference (ie "@(Bar)"), and
// if so we need to add the right item reference.
foreach (var metadatumElement in itemElement.Metadata)
{
// Since we're just attempting to expand properties in order to find referenced items and not expanding metadata,
// unexpected errors may occur when evaluating property functions on unexpanded metadata. Just ignore them if that happens.
// See: https://github.com/Microsoft/msbuild/issues/3460
const ExpanderOptions expanderOptions = ExpanderOptions.ExpandProperties | ExpanderOptions.LeavePropertiesUnexpandedOnError;
var valueWithPropertiesExpanded = _expander.ExpandIntoStringLeaveEscaped(
metadatumElement.Value,
expanderOptions,
metadatumElement.Location);
var conditionWithPropertiesExpanded = _expander.ExpandIntoStringLeaveEscaped(
metadatumElement.Condition,
expanderOptions,
metadatumElement.ConditionLocation);
values.Add(valueWithPropertiesExpanded);
values.Add(conditionWithPropertiesExpanded);
}
var itemsAndMetadataFound = ExpressionShredder.GetReferencedItemNamesAndMetadata(values);
if (itemsAndMetadataFound.Items != null)
{
foreach (var itemType in itemsAndMetadataFound.Items)
{
AddReferencedItemList(itemType, operationBuilder.ReferencedItemLists);
}
}
}
}
protected bool NeedToExpandMetadataForEachItem(ImmutableList <ProjectMetadataElement> metadata, out ItemsAndMetadataPair itemsAndMetadataFound)
{
List <string> values = new List <string>(metadata.Count * 2);
foreach (var metadataElement in metadata)
{
values.Add(metadataElement.Value);
values.Add(metadataElement.Condition);
}
itemsAndMetadataFound = ExpressionShredder.GetReferencedItemNamesAndMetadata(values);
bool needToExpandMetadataForEachItem = false;
if (itemsAndMetadataFound.Metadata != null && itemsAndMetadataFound.Metadata.Values.Count > 0)
{
// If there is bare metadata of any kind, and the Include involved an item list, we should
// run items individually, as even non-built-in metadata might differ between items
if (_referencedItemLists.Count >= 0)
{
needToExpandMetadataForEachItem = true;
}
else
{
// If there is bare built-in metadata, we must always run items individually, as that almost
// always differs between items.
// UNDONE: When batching is implemented for real, we need to make sure that
// item definition metadata is included in all metadata operations during evaluation
if (itemsAndMetadataFound.Metadata.Values.Count > 0)
{
needToExpandMetadataForEachItem = true;
}
}
}
return(needToExpandMetadataForEachItem);
}