Optimize Evaluate

src/Build/Definition/ProjectProperty.cs

@@ -49,7 +49,7 @@ internal ProjectProperty(Project project, string evaluatedValueEscaped)
             _evaluatedValueEscaped = evaluatedValueEscaped;
         }
 
-        internal virtual string EvaluatedValueEscapedIntenral => _evaluatedValueEscaped;
+        internal virtual string EvaluatedValueEscapedInternal => _evaluatedValueEscaped;
 
         /// <summary>
         /// Name of the property.
@@ -79,7 +79,7 @@ public string EvaluatedValue
         {
             [DebuggerStepThrough]
             get
-            { return EscapingUtilities.UnescapeAll(EvaluatedValueEscapedIntenral); }
+            { return EscapingUtilities.UnescapeAll(EvaluatedValueEscapedInternal); }
         }
 
         /// <summary>
@@ -94,7 +94,7 @@ public string EvaluatedValue
         string IProperty.EvaluatedValueEscaped
         {
             [DebuggerStepThrough]
-            get => EvaluatedValueEscapedIntenral;
+            get => EvaluatedValueEscapedInternal;
         }
 
         /// <summary>
@@ -201,7 +201,7 @@ string IKeyed.Key
         string IValued.EscapedValue
         {
             [DebuggerStepThrough]
-            get => EvaluatedValueEscapedIntenral;
+            get => EvaluatedValueEscapedInternal;
         }
 
         #region IEquatable<ProjectProperty> Members
@@ -225,7 +225,7 @@ bool IEquatable<ProjectProperty>.Equals(ProjectProperty other)
 
             return _project == other._project &&
                    Xml == other.Xml &&
-                   EvaluatedValueEscapedIntenral == other.EvaluatedValueEscapedIntenral &&
+                   EvaluatedValueEscapedInternal == other.EvaluatedValueEscapedInternal &&
                    Name == other.Name;
         }
 

src/Build/Evaluation/Expander.cs

@@ -738,11 +738,6 @@ internal static string ExpandMetadataLeaveEscaped(string expression, IMetadataTa
                         return expression;
                     }
 
-                    if (expression.Length == 0)
-                    {
-                        return expression;
-                    }
-
                     ErrorUtilities.VerifyThrow(metadata != null, "Cannot expand metadata without providing metadata");
 
                     // PERF NOTE: Regex matching is expensive, so if the string doesn't contain any item metadata references, just bail
@@ -1938,7 +1933,7 @@ private static class ItemExpander
             internal static string ExpandItemVectorsIntoString<T>(Expander<P, I> expander, string expression, IItemProvider<T> items, ExpanderOptions options, IElementLocation elementLocation)
                 where T : class, IItem
             {
-                if (((options & ExpanderOptions.ExpandItems) == 0) || (expression.Length == 0))
+                if ((options & ExpanderOptions.ExpandItems) == 0)
                 {
                     return expression;
                 }

src/Build/Evaluation/ItemSpec.cs

@@ -4,11 +4,9 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Runtime.InteropServices.WindowsRuntime;
 using Microsoft.Build.Globbing;
 using Microsoft.Build.Internal;
 using Microsoft.Build.Shared;
-using Microsoft.Build.Shared.EscapingStringExtensions;
 
 namespace Microsoft.Build.Evaluation
 {
@@ -475,7 +473,7 @@ public virtual IMSBuildGlob ToMSBuildGlob()
 
         protected virtual IMSBuildGlob CreateMsBuildGlob()
         {
-            return MSBuildGlob.Parse(ProjectDirectory, TextFragment.Unescape());
+            return MSBuildGlob.Parse(ProjectDirectory, EscapingUtilities.UnescapeAll(TextFragment));
         }
 
         private FileSpecMatcherTester CreateFileSpecMatcher()

src/Build/Evaluation/LazyItemEvaluator.cs

@@ -59,18 +59,14 @@ public LazyItemEvaluator(IEvaluatorData<P, I, M, D> data, IItemFactory<I, I> ite
 
         private ImmutableList<I> GetItems(string itemType)
         {
-            LazyItemList itemList = GetItemList(itemType);
-            if (itemList == null)
-            {
-                return ImmutableList<I>.Empty;
-            }
-
-            return itemList.GetMatchedItems(ImmutableHashSet<string>.Empty);
+            return _itemLists.TryGetValue(itemType, out LazyItemList itemList) ?
+                itemList.GetMatchedItems(ImmutableHashSet<string>.Empty) :
+                ImmutableList<I>.Empty;
         }
 
         public bool EvaluateConditionWithCurrentState(ProjectElement element, ExpanderOptions expanderOptions, ParserOptions parserOptions)
         {
-            return EvaluateCondition(element, expanderOptions, parserOptions, _expander, this);
+            return EvaluateCondition(element.Condition, element, expanderOptions, parserOptions, _expander, this);
         }
 
         private static bool EvaluateCondition(
@@ -108,17 +104,6 @@ public bool EvaluateConditionWithCurrentState(ProjectElement element, ExpanderOp
             }
         }
 
-        private static bool EvaluateCondition(
-            ProjectElement element,
-            ExpanderOptions expanderOptions,
-            ParserOptions parserOptions,
-            Expander<P, I> expander,
-            LazyItemEvaluator<P, I, M, D> lazyEvaluator
-            )
-        {
-            return EvaluateCondition(element.Condition, element, expanderOptions, parserOptions, expander, lazyEvaluator);
-        }
-
         /// <summary>
         /// COMPAT: Whidbey used the "current project file/targets" directory for evaluating Import and PropertyGroup conditions
         /// Orcas broke this by using the current root project file for all conditions
@@ -417,21 +402,13 @@ public OperationBuilderWithMetadata(ProjectItemElement itemElement, bool conditi
 
         private void AddReferencedItemList(string itemType, IDictionary<string, LazyItemList> referencedItemLists)
         {
-            var itemList = GetItemList(itemType);
-            if (itemList != null)
+            if (_itemLists.TryGetValue(itemType, out LazyItemList itemList))
             {
                 itemList.MarkAsReferenced();
                 referencedItemLists[itemType] = itemList;
             }
         }
 
-        private LazyItemList GetItemList(string itemType)
-        {
-            LazyItemList ret;
-            _itemLists.TryGetValue(itemType, out ret);
-            return ret;
-        }
-
         public IEnumerable<ItemData> GetAllItemsDeferred()
         {
             return _itemLists.Values.SelectMany(itemList => itemList.GetItemData(ImmutableHashSet<string>.Empty))
@@ -459,7 +436,7 @@ public void ProcessItemElement(string rootDirectory, ProjectItemElement itemElem
                 ErrorUtilities.ThrowInternalErrorUnreachable();
             }
 
-            LazyItemList previousItemList = GetItemList(itemElement.ItemType);
+            _itemLists.TryGetValue(itemElement.ItemType, out LazyItemList previousItemList);
             LazyItemList newList = new LazyItemList(previousItemList, operation);
             _itemLists[itemElement.ItemType] = newList;
         }

src/Build/Microsoft.Build.csproj

@@ -696,9 +696,6 @@
     <Compile Include="..\Shared\ExceptionHandling.cs">
       <Link>SharedUtilities\ExceptionHandling.cs</Link>
     </Compile>
-    <Compile Include="..\Shared\EscapingStringExtensions\EscapingStringExtensions.cs">
-      <Link>SharedUtilities\EscapingStringExtensions\EscapingStringExtensions.cs</Link>
-    </Compile>
     <Compile Include="..\Shared\FileMatcher.cs">
       <Link>SharedUtilities\FileMatcher.cs</Link>
       <ExcludeFromStyleCop>true</ExcludeFromStyleCop>

src/Build/ObjectModelRemoting/DefinitionObjectsLinks/ProjectPropertyLink.cs

@@ -68,7 +68,7 @@ public abstract class ProjectPropertyLink
         /// </summary>
         public static string GetEvaluatedValueEscaped(ProjectProperty property)
         {
-            return property.EvaluatedValueEscapedIntenral;
+            return property.EvaluatedValueEscapedInternal;
         }
     }
 }

src/Build/ObjectModelRemoting/LinkedObjectFactory.cs

@@ -308,7 +308,7 @@ public override string UnevaluatedValue
 
             public override bool IsImported => Link.IsImported;
 
-            internal override string EvaluatedValueEscapedIntenral => Link.EvaluatedIncludeEscaped;
+            internal override string EvaluatedValueEscapedInternal => Link.EvaluatedIncludeEscaped;
         }
         #endregion
     }

src/Build/Utilities/EngineFileUtilities.cs

@@ -167,7 +167,7 @@ private string[] GetFileList
                 // Unescape before handing it to the filesystem.
                 var directoryUnescaped = EscapingUtilities.UnescapeAll(directoryEscaped);
                 var filespecUnescaped = EscapingUtilities.UnescapeAll(filespecEscaped);
-                var excludeSpecsUnescaped = excludeSpecsEscaped.Where(IsValidExclude).Select(EscapingUtilities.UnescapeAll).ToList();
+                var excludeSpecsUnescaped = excludeSpecsEscaped.Where(IsValidExclude).Select(i => EscapingUtilities.UnescapeAll(i)).ToList();
 
                 // Get the list of actual files which match the filespec.  Put
                 // the list into a string array.  If the filespec started out

src/Build/Utilities/FileSpecMatchTester.cs

@@ -2,7 +2,6 @@
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
 using Microsoft.Build.Shared;
-using Microsoft.Build.Shared.EscapingStringExtensions;
 using System;
 using System.Diagnostics;
 using System.IO;
@@ -27,7 +26,7 @@ private FileSpecMatcherTester(string currentDirectory, string unescapedFileSpec,
 
         public static FileSpecMatcherTester Parse(string currentDirectory, string fileSpec)
         {
-            string unescapedFileSpec = fileSpec.Unescape();
+            string unescapedFileSpec = EscapingUtilities.UnescapeAll(fileSpec);
             Regex regex = EngineFileUtilities.FilespecHasWildcards(fileSpec) ? CreateRegex(unescapedFileSpec, currentDirectory) : null;
 
             return new FileSpecMatcherTester(currentDirectory, unescapedFileSpec, regex);

src/Shared/EscapingUtilities.cs

@@ -24,20 +24,6 @@ static internal class EscapingUtilities
         /// </summary>
         private static Dictionary<string, string> s_unescapedToEscapedStrings = new Dictionary<string, string>(StringComparer.Ordinal);
 
-        /// <summary>
-        /// Replaces all instances of %XX in the input string with the character represented
-        /// by the hexadecimal number XX.
-        /// </summary>
-        /// <param name="escapedString">The string to unescape.</param>
-        /// <returns>unescaped string</returns>
-        internal static string UnescapeAll
-        (
-            string escapedString
-        )
-        {
-            return UnescapeAll(escapedString, out bool _);
-        }
-
         private static bool IsHexDigit(char character)
         {
             return ((character >= '0') && (character <= '9'))
@@ -50,16 +36,10 @@ private static bool IsHexDigit(char character)
         /// by the hexadecimal number XX.
         /// </summary>
         /// <param name="escapedString">The string to unescape.</param>
-        /// <param name="escapingWasNecessary">Whether any replacements were made.</param>
+        /// <param name="trim">If the string should be trimmed before being unescaped.</param>
         /// <returns>unescaped string</returns>
-        internal static string UnescapeAll
-        (
-            string escapedString,
-            out bool escapingWasNecessary
-        )
+        internal static string UnescapeAll(string escapedString, bool trim = false)
         {
-            escapingWasNecessary = false;
-
             // If the string doesn't contain anything, then by definition it doesn't
             // need unescaping.
             if (String.IsNullOrEmpty(escapedString))
@@ -79,6 +59,22 @@ internal static string UnescapeAll
             StringBuilder unescapedString = StringBuilderCache.Acquire(escapedString.Length);
 
             int currentPosition = 0;
+            int escapedStringLength = escapedString.Length;
+            if (trim)
+            {
+                while (currentPosition < escapedString.Length && Char.IsWhiteSpace(escapedString[currentPosition]))
+                {
+                    currentPosition++;
+                }
+                if (currentPosition == escapedString.Length)
+                {
+                    return String.Empty;
+                }
+                while (Char.IsWhiteSpace(escapedString[escapedStringLength]))
+                {
+                    escapedStringLength--;
+                }
+            }
 
             // Loop until there are no more percent signs in the input string.
             while (indexOfPercent != -1)
@@ -106,8 +102,6 @@ internal static string UnescapeAll
                     // Advance the current pointer to reflect the fact that the destination string
                     // is up to date with everything up to and including this escape code we just found.
                     currentPosition = indexOfPercent + 3;
-
-                    escapingWasNecessary = true;
                 }
 
                 // Find the next percent sign.
@@ -116,7 +110,7 @@ internal static string UnescapeAll
 
             // Okay, there are no more percent signs in the input string, so just copy the remaining
             // characters into the destination.
-            unescapedString.Append(escapedString, currentPosition, escapedString.Length - currentPosition);
+            unescapedString.Append(escapedString, currentPosition, escapedStringLength - currentPosition);
 
             return StringBuilderCache.GetStringAndRelease(unescapedString);
         }

src/Shared/FileUtilities.cs

@@ -223,6 +223,20 @@ internal static string EnsureNoTrailingSlash(string path)
             return path;
         }
 
+        /// <summary>
+        /// Ensures the path does not have a leading or trailing slash.
+        /// </summary>
+        internal static string EnsureNoLeadingOrTrailingSlash(string path)
+        {
+            if (String.IsNullOrEmpty(path))
+            {
+                return path;
+            }
+            int start = IsSlash(path[0]) ? 1 : 0;
+            int end = IsSlash(path[path.Length - 1]) ? 1 : 0;
+            return path.Substring(start, path.Length - start - end);
+        }
+
         /// <summary>
         /// Indicates if the given file-spec ends with a slash.
         /// </summary>

src/Utilities/Microsoft.Build.Utilities.csproj

@@ -88,9 +88,6 @@
     <Compile Include="..\Shared\ExceptionHandling.cs">
       <Link>Shared\ExceptionHandling.cs</Link>
     </Compile>
-    <Compile Include="..\Shared\EscapingStringExtensions\EscapingStringExtensions.cs">
-      <Link>Shared\EscapingStringExtensions\EscapingStringExtensions.cs</Link>
-    </Compile>
     <Compile Include="..\Shared\FileUtilities.cs">
       <Link>Shared\FileUtilities.cs</Link>
     </Compile>