private void ProcessMetadataElements(ProjectItemElement itemElement, OperationBuilderWithMetadata operationBuilder)
{
if (itemElement.HasMetadata)
{
operationBuilder.Metadata.AddRange(itemElement.Metadata);
List <string> values = new List <string>(itemElement.Metadata.Count * 2);
foreach (ProjectMetadataElement metadatumElement in itemElement.Metadata)
{
values.Add(metadatumElement.Value);
values.Add(metadatumElement.Condition);
}
ItemsAndMetadataPair itemsAndMetadataFound = ExpressionShredder.GetReferencedItemNamesAndMetadata(values);
if (itemsAndMetadataFound.Items != null)
{
foreach (var itemType in itemsAndMetadataFound.Items)
{
var itemList = GetItemList(itemType);
if (itemList != null)
{
operationBuilder.ReferencedItemLists[itemType] = itemList;
}
}
}
}
}
/// <summary>
/// Returns true if there is a metadata expression (outside of a transform) in the expression.
/// </summary>
internal static bool ContainsMetadataExpressionOutsideTransform(string expression)
{
ItemsAndMetadataPair pair = new ItemsAndMetadataPair(null, null);
GetReferencedItemNamesAndMetadata(expression, 0, expression.Length, ref pair, ShredderOptions.MetadataOutsideTransforms);
bool result = (pair.Metadata?.Count > 0);
return(result);
}
/// <summary>
/// Given a list of expressions that may contain item list expressions,
/// returns a pair of tables of all item names found, as K=Name, V=String.Empty;
/// and all metadata not in transforms, as K=Metadata key, V=MetadataReference,
/// where metadata key is like "itemname.metadataname" or "metadataname".
/// PERF: Tables are null if there are no entries, because this is quite a common case.
/// </summary>
internal static ItemsAndMetadataPair GetReferencedItemNamesAndMetadata(IEnumerable <string> expressions)
{
ItemsAndMetadataPair pair = new ItemsAndMetadataPair(null, null);
foreach (string expression in expressions)
{
GetReferencedItemNamesAndMetadata(expression, 0, expression.Length, ref pair, ShredderOptions.All);
}
return(pair);
}
/// <summary>
/// Given a subexpression, finds referenced item names and inserts them into the table
/// as K=Name, V=String.Empty.
/// </summary>
/// <remarks>
/// We can ignore any semicolons in the expression, since we're not itemizing it.
/// </remarks>
private static void GetReferencedItemNamesAndMetadata(string expression, int start, int end, ref ItemsAndMetadataPair pair, ShredderOptions whatToShredFor)
{
for (int i = start; i < end; i++)
{
int restartPoint;
if (Sink(expression, ref i, end, '@', '('))
{
// Start of a possible item list expression
// Store the index to backtrack to if this doesn't turn out to be a well
// formed metadata expression. (Subtract one for the increment when we loop around.)
restartPoint = i - 1;
SinkWhitespace(expression, ref i);
int startOfName = i;
if (!SinkValidName(expression, ref i, end))
{
i = restartPoint;
continue;
}
// '-' is a legitimate char in an item name, but we should match '->' as an arrow
// in '@(foo->'x')' rather than as the last char of the item name.
// The old regex accomplished this by being "greedy"
if (end > i && expression[i - 1] == '-' && expression[i] == '>')
{
i--;
}
// Grab the name, but continue to verify it's a well-formed expression
// before we store it.
string name = expression.Substring(startOfName, i - startOfName);
SinkWhitespace(expression, ref i);
bool transformOrFunctionFound = true;
// If there's an '->' eat it and the subsequent quoted expression or transform function
while (Sink(expression, ref i, end, '-', '>') && transformOrFunctionFound)
{
SinkWhitespace(expression, ref i);
int startTransform = i;
bool isQuotedTransform = SinkSingleQuotedExpression(expression, ref i, end);
if (isQuotedTransform)
{
continue;
}
ItemExpressionCapture functionCapture = SinkItemFunctionExpression(expression, startTransform, ref i, end);
if (functionCapture != null)
{
continue;
}
if (!isQuotedTransform && functionCapture == null)
{
i = restartPoint;
transformOrFunctionFound = false;
}
}
if (!transformOrFunctionFound)
{
continue;
}
SinkWhitespace(expression, ref i);
// If there's a ',', eat it and the subsequent quoted expression
if (Sink(expression, ref i, ','))
{
SinkWhitespace(expression, ref i);
if (!Sink(expression, ref i, '\''))
{
i = restartPoint;
continue;
}
int closingQuote = expression.IndexOf('\'', i);
if (closingQuote == -1)
{
i = restartPoint;
continue;
}
// Look for metadata in the separator expression
// e.g., @(foo, '%(bar)') contains batchable metadata 'bar'
GetReferencedItemNamesAndMetadata(expression, i, closingQuote, ref pair, ShredderOptions.MetadataOutsideTransforms);
i = closingQuote + 1;
}
SinkWhitespace(expression, ref i);
if (!Sink(expression, ref i, ')'))
{
i = restartPoint;
continue;
}
// If we've got this far, we know the item expression was
// well formed, so make sure the name's in the table
if ((whatToShredFor & ShredderOptions.ItemTypes) != 0)
{
pair.Items ??= new HashSet <string>(MSBuildNameIgnoreCaseComparer.Default);
pair.Items.Add(name);
}
i--;
continue;
}
if (Sink(expression, ref i, end, '%', '('))
{
// Start of a possible metadata expression
// Store the index to backtrack to if this doesn't turn out to be a well
// formed metadata expression. (Subtract one for the increment when we loop around.)
restartPoint = i - 1;
SinkWhitespace(expression, ref i);
int startOfText = i;
if (!SinkValidName(expression, ref i, end))
{
i = restartPoint;
continue;
}
// Grab this, but we don't know if it's an item or metadata name yet
string firstPart = expression.Substring(startOfText, i - startOfText);
string itemName = null;
string metadataName;
string qualifiedMetadataName;
SinkWhitespace(expression, ref i);
bool qualified = Sink(expression, ref i, '.');
if (qualified)
{
SinkWhitespace(expression, ref i);
startOfText = i;
if (!SinkValidName(expression, ref i, end))
{
i = restartPoint;
continue;
}
itemName = firstPart;
metadataName = expression.Substring(startOfText, i - startOfText);
qualifiedMetadataName = itemName + "." + metadataName;
}
else
{
metadataName = firstPart;
qualifiedMetadataName = metadataName;
}
SinkWhitespace(expression, ref i);
if (!Sink(expression, ref i, ')'))
{
i = restartPoint;
continue;
}
if ((whatToShredFor & ShredderOptions.MetadataOutsideTransforms) != 0)
{
pair.Metadata ??= new Dictionary <string, MetadataReference>(MSBuildNameIgnoreCaseComparer.Default);
pair.Metadata[qualifiedMetadataName] = new MetadataReference(itemName, metadataName);
}
i--;
}
}
}
protected void DecorateItemsWithMetadata(ImmutableList <I> items, ImmutableList <ProjectMetadataElement> metadata)
{
if (metadata.Count > 0)
{
////////////////////////////////////////////////////
// UNDONE: Implement batching here.
//
// We want to allow built-in metadata in metadata values here.
// For example, so that an Idl file can specify that its Tlb output should be named %(Filename).tlb.
//
// In other words, we want batching. However, we won't need to go to the trouble of using the regular batching code!
// That's because that code is all about grouping into buckets of similar items. In this context, we're not
// invoking a task, and it's fine to process each item individually, which will always give the correct results.
//
// For the CTP, to make the minimal change, we will not do this quite correctly.
//
// We will do this:
// -- check whether any metadata values or their conditions contain any bare built-in metadata expressions,
// or whether they contain any custom metadata && the Include involved an @(itemlist) expression.
// -- if either case is found, we go ahead and evaluate all the metadata separately for each item.
// -- otherwise we can do the old thing (evaluating all metadata once then applying to all items)
//
// This algorithm gives the correct results except when:
// -- batchable expressions exist on the include, exclude, or condition on the item element itself
//
// It means that 99% of cases still go through the old code, which is best for the CTP.
// When we ultimately implement this correctly, we should make sure we optimize for the case of very many items
// and little metadata, none of which varies between items.
// Do not expand properties as they have been already expanded by the lazy evaluator upon item operation construction.
// Prior to lazy evaluation ExpanderOptions.ExpandAll was used.
const ExpanderOptions metadataExpansionOptions = ExpanderOptions.ExpandAll;
List <string> values = new List <string>(metadata.Count * 2);
foreach (var metadataElement in metadata)
{
values.Add(metadataElement.Value);
values.Add(metadataElement.Condition);
}
ItemsAndMetadataPair itemsAndMetadataFound = ExpressionShredder.GetReferencedItemNamesAndMetadata(values);
bool needToProcessItemsIndividually = 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)
{
needToProcessItemsIndividually = 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)
{
needToProcessItemsIndividually = true;
}
}
}
if (needToProcessItemsIndividually)
{
foreach (I item in items)
{
_expander.Metadata = item;
foreach (var metadataElement in metadata)
{
#if FEATURE_MSBUILD_DEBUGGER
//if (DebuggerManager.DebuggingEnabled)
//{
// DebuggerManager.PulseState(metadataElementElement.Location, _itemPassLocals);
//}
#endif
if (!EvaluateCondition(metadataElement.Condition, metadataElement, metadataExpansionOptions, ParserOptions.AllowAll, _expander, _lazyEvaluator))
{
continue;
}
string evaluatedValue = _expander.ExpandIntoStringLeaveEscaped(metadataElement.Value, metadataExpansionOptions, metadataElement.Location);
item.SetMetadata(metadataElement, FileUtilities.MaybeAdjustFilePath(evaluatedValue, metadataElement.ContainingProject.DirectoryPath));
}
}
// End of legal area for metadata expressions.
_expander.Metadata = null;
}
// End of pseudo batching
////////////////////////////////////////////////////
// Start of old code
else
{
// Metadata expressions are allowed here.
// Temporarily gather and expand these in a table so they can reference other metadata elements above.
EvaluatorMetadataTable metadataTable = new EvaluatorMetadataTable(_itemType);
_expander.Metadata = metadataTable;
// Also keep a list of everything so we can get the predecessor objects correct.
List <Pair <ProjectMetadataElement, string> > metadataList = new List <Pair <ProjectMetadataElement, string> >(metadata.Count);
foreach (var metadataElement in metadata)
{
// Because of the checking above, it should be safe to expand metadata in conditions; the condition
// will be true for either all the items or none
if (!EvaluateCondition(metadataElement.Condition, metadataElement, metadataExpansionOptions, ParserOptions.AllowAll, _expander, _lazyEvaluator))
{
continue;
}
#if FEATURE_MSBUILD_DEBUGGER
//if (DebuggerManager.DebuggingEnabled)
//{
// DebuggerManager.PulseState(metadataElementElement.Location, _itemPassLocals);
//}
#endif
string evaluatedValue = _expander.ExpandIntoStringLeaveEscaped(metadataElement.Value, metadataExpansionOptions, metadataElement.Location);
evaluatedValue = FileUtilities.MaybeAdjustFilePath(evaluatedValue, metadataElement.ContainingProject.DirectoryPath);
metadataTable.SetValue(metadataElement, evaluatedValue);
metadataList.Add(new Pair <ProjectMetadataElement, string>(metadataElement, evaluatedValue));
}
// Apply those metadata to each item
// Note that several items could share the same metadata objects
// Set all the items at once to make a potential copy-on-write optimization possible.
// This is valuable in the case where one item element evaluates to
// many items (either by semicolon or wildcards)
// and that item also has the same piece/s of metadata for each item.
_itemFactory.SetMetadata(metadataList, items);
// End of legal area for metadata expressions.
_expander.Metadata = null;
}
}
}
protected bool NeedToExpandMetadataForEachItem(ImmutableList <ProjectMetadataElement> metadata, out ItemsAndMetadataPair itemsAndMetadataFound)
{
itemsAndMetadataFound = ExpressionShredder.GetReferencedItemNamesAndMetadata(GetMetadataValuesAndConditions(metadata));
bool needToExpandMetadataForEachItem = false;
if (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);
}
/// <summary>
/// Given a subexpression, finds referenced item names and inserts them into the table
/// as K=Name, V=String.Empty.
/// </summary>
/// <remarks>
/// We can ignore any semicolons in the expression, since we're not itemizing it.
/// </remarks>
private static void GetReferencedItemNamesAndMetadata(string expression, int start, int end, ref ItemsAndMetadataPair pair, ShredderOptions whatToShredFor)
{
for (int i = start; i < end; i++)
{
int restartPoint;
if (Sink(expression, ref i, end, '@', '('))
{
// Start of a possible item list expression
// Store the index to backtrack to if this doesn't turn out to be a well
// formed metadata expression. (Subtract one for the increment when we loop around.)
restartPoint = i - 1;
SinkWhitespace(expression, ref i);
int startOfName = i;
if (!SinkValidName(expression, ref i, end))
{
i = restartPoint;
continue;
}
// '-' is a legitimate char in an item name, but we should match '->' as an arrow
// in '@(foo->'x')' rather than as the last char of the item name.
// The old regex accomplished this by being "greedy"
if (end > i && expression[i - 1] == '-' && expression[i] == '>')
{
i--;
}
// Grab the name, but continue to verify it's a well-formed expression
// before we store it.
string name = expression.Substring(startOfName, i - startOfName);
SinkWhitespace(expression, ref i);
bool transformOrFunctionFound = true;
// If there's an '->' eat it and the subsequent quoted expression or transform function
while (Sink(expression, ref i, end, '-', '>') && transformOrFunctionFound)
{
SinkWhitespace(expression, ref i);
int startTransform = i;
bool isQuotedTransform = SinkSingleQuotedExpression(expression, ref i, end);
if (isQuotedTransform)
{
continue;
}
ItemExpressionCapture functionCapture = SinkItemFunctionExpression(expression, startTransform, ref i, end);
if (functionCapture != null)
{
continue;
}
if (!isQuotedTransform && functionCapture == null)
{
i = restartPoint;
transformOrFunctionFound = false;
}
}
if (!transformOrFunctionFound)
{
continue;
}
SinkWhitespace(expression, ref i);
// If there's a ',', eat it and the subsequent quoted expression
if (Sink(expression, ref i, ','))
{
SinkWhitespace(expression, ref i);
if (!Sink(expression, ref i, '\''))
{
i = restartPoint;
continue;
}
int closingQuote = expression.IndexOf('\'', i);
if (closingQuote == -1)
{
i = restartPoint;
continue;
}
// Look for metadata in the separator expression
// e.g., @(foo, '%(bar)') contains batchable metadata 'bar'
GetReferencedItemNamesAndMetadata(expression, i, closingQuote, ref pair, ShredderOptions.MetadataOutsideTransforms);
i = closingQuote + 1;
}
SinkWhitespace(expression, ref i);
if (!Sink(expression, ref i, ')'))
{
i = restartPoint;
continue;
}
// If we've got this far, we know the item expression was
// well formed, so make sure the name's in the table
if ((whatToShredFor & ShredderOptions.ItemTypes) != 0)
{
pair.Items = pair.Items ?? new HashSet<string>(MSBuildNameIgnoreCaseComparer.Default);
pair.Items.Add(name);
}
i--;
continue;
}
if (Sink(expression, ref i, end, '%', '('))
{
// Start of a possible metadata expression
// Store the index to backtrack to if this doesn't turn out to be a well
// formed metadata expression. (Subtract one for the increment when we loop around.)
restartPoint = i - 1;
SinkWhitespace(expression, ref i);
int startOfText = i;
if (!SinkValidName(expression, ref i, end))
{
i = restartPoint;
continue;
}
// Grab this, but we don't know if it's an item or metadata name yet
string firstPart = expression.Substring(startOfText, i - startOfText);
string itemName = null;
string metadataName;
string qualifiedMetadataName;
SinkWhitespace(expression, ref i);
bool qualified = Sink(expression, ref i, '.');
if (qualified)
{
SinkWhitespace(expression, ref i);
startOfText = i;
if (!SinkValidName(expression, ref i, end))
{
i = restartPoint;
continue;
}
itemName = firstPart;
metadataName = expression.Substring(startOfText, i - startOfText);
qualifiedMetadataName = itemName + "." + metadataName;
}
else
{
metadataName = firstPart;
qualifiedMetadataName = metadataName;
}
SinkWhitespace(expression, ref i);
if (!Sink(expression, ref i, ')'))
{
i = restartPoint;
continue;
}
if ((whatToShredFor & ShredderOptions.MetadataOutsideTransforms) != 0)
{
pair.Metadata = pair.Metadata ?? new Dictionary<string, MetadataReference>(MSBuildNameIgnoreCaseComparer.Default);
pair.Metadata[qualifiedMetadataName] = new MetadataReference(itemName, metadataName);
}
i--;
}
}
}
/// <summary>
/// Returns true if there is a metadata expression (outside of a transform) in the expression.
/// </summary>
internal static bool ContainsMetadataExpressionOutsideTransform(string expression)
{
ItemsAndMetadataPair pair = new ItemsAndMetadataPair(null, null);
GetReferencedItemNamesAndMetadata(expression, 0, expression.Length, ref pair, ShredderOptions.MetadataOutsideTransforms);
bool result = (pair.Metadata != null && pair.Metadata.Count > 0);
return result;
}
/// <summary>
/// Given a list of expressions that may contain item list expressions,
/// returns a pair of tables of all item names found, as K=Name, V=String.Empty;
/// and all metadata not in transforms, as K=Metadata key, V=MetadataReference,
/// where metadata key is like "itemname.metadataname" or "metadataname".
/// PERF: Tables are null if there are no entries, because this is quite a common case.
/// </summary>
internal static ItemsAndMetadataPair GetReferencedItemNamesAndMetadata(List<string> expressions)
{
ItemsAndMetadataPair pair = new ItemsAndMetadataPair(null, null);
foreach (string expression in expressions)
{
GetReferencedItemNamesAndMetadata(expression, 0, expression.Length, ref pair, ShredderOptions.All);
}
return pair;
}
