Provide a default INSTALLFOLDER.

If INSTALLFOLDER is referenced and not defined, define one with
reasonable default values.

Implements WIP wixtoolset/issues#7588.

src/wix/WixToolset.Core/Link/AddDefaultSymbolsCommand.cs

@@ -0,0 +1,69 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Core.Link
+{
+    using System.Collections.Generic;
+    using System.Linq;
+    using WixToolset.Data;
+    using WixToolset.Data.Symbols;
+
+    internal class AddDefaultSymbolsCommand
+    {
+        public static readonly string WixStandardInstallFolder = "INSTALLFOLDER";
+        public static readonly string WixStandardInstallFolderParent = "ProgramFiles6432Folder";
+        public static readonly string WixStandardInstallFolderReference = "Directory:INSTALLFOLDER";
+
+        public AddDefaultSymbolsCommand(FindEntrySectionAndLoadSymbolsCommand find, IList<IntermediateSection> sections)
+        {
+            this.Find = find;
+            this.Sections = sections;
+        }
+
+        public IList<IntermediateSection> Sections { get; }
+
+        public FindEntrySectionAndLoadSymbolsCommand Find { get; }
+
+        public void Execute()
+        {
+            if (this.Find.EntrySection.Type != SectionType.Package)
+            {
+                // Only packages...for now.
+                return;
+            }
+
+            if (!this.Find.SymbolsByName.ContainsKey(WixStandardInstallFolderReference))
+            {
+                // If there are any INSTALLFOLDER references, add a default one, using the
+                // first reference as the "canonical" reference for source line numbers.
+                this.AddSymbolsToNewSection(
+                    new DirectorySymbol(null, new Identifier(AccessModifier.Global, WixStandardInstallFolder))
+                    {
+                        ParentDirectoryRef = WixStandardInstallFolderParent,
+                        Name = "!(bind.Property.Manufacturer) !(bind.Property.ProductName)",
+                        SourceName = ".",
+                    },
+                    new WixSimpleReferenceSymbol(null, new Identifier(AccessModifier.Global, WixStandardInstallFolder))
+                    {
+                        Table = "Directory",
+                        PrimaryKeys = WixStandardInstallFolderParent,
+                    }
+                );
+            }
+        }
+
+        private void AddSymbolsToNewSection(params IntermediateSymbol[] symbols)
+        {
+            var section = new IntermediateSection(WixStandardInstallFolder, SectionType.Fragment);
+            this.Sections.Add(section);
+
+            foreach (var symbol in symbols)
+            {
+                section.AddSymbol(symbol);
+
+                var symbolWithSection = new SymbolWithSection(section, symbol);
+                var fullName = symbolWithSection.GetFullName();
+                this.Find.SymbolsByName.Add(fullName, symbolWithSection);
+            }
+        }
+    }
+}

src/wix/WixToolset.Core/Linker.cs

@@ -126,11 +126,10 @@ public Intermediate Link(ILinkContext context)
                     }
                 }
 
-                // If there are no authored features, create a default feature and assign the components to it.
-                if (find.EntrySection.Type == SectionType.Package
-                    && !sections.Where(s => s.Id != WixStandardLibraryIdentifiers.DefaultFeatureName).SelectMany(s => s.Symbols).OfType<FeatureSymbol>().Any())
+                // Add default symbols that need a bit more intelligence than just being
+                // included in the standard library.
                 {
-                    var command = new AssignDefaultFeatureCommand(find.EntrySection, sections);
+                    var command = new AddDefaultSymbolsCommand(find, sections);
                     command.Execute();
                 }
 

src/wix/test/WixToolsetTest.CoreIntegration/DirectoryFixture.cs

@@ -13,6 +13,44 @@ namespace WixToolsetTest.CoreIntegration
 
     public class DirectoryFixture
     {
+        [Fact]
+        public void CanGetDefaultInstallFolder()
+        {
+            var folder = TestData.Get(@"TestData\SingleFile");
+
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var intermediateFolder = Path.Combine(baseFolder, "obj");
+                var msiPath = Path.Combine(baseFolder, @"bin\test.msi");
+
+                var result = WixRunner.Execute(new[]
+                {
+                    "build",
+                    Path.Combine(folder, "Package.wxs"),
+                    Path.Combine(folder, "PackageComponents.wxs"),
+                    "-loc", Path.Combine(folder, "Package.en-us.wxl"),
+                    "-bindpath", Path.Combine(folder, "data"),
+                    "-intermediateFolder", intermediateFolder,
+                    "-o", msiPath
+                });
+
+                result.AssertSuccess();
+
+                var intermediate = Intermediate.Load(Path.Combine(baseFolder, @"bin\test.wixpdb"));
+                var section = intermediate.Sections.Single();
+
+                var dirSymbols = section.Symbols.OfType<WixToolset.Data.Symbols.DirectorySymbol>().ToList();
+                WixAssert.CompareLineByLine(new[]
+                {
+                    "INSTALLFOLDER:ProgramFiles6432Folder:Example Corporation MsiPackage",
+                    "ProgramFiles6432Folder:ProgramFilesFolder:.",
+                    "ProgramFilesFolder:TARGETDIR:PFiles",
+                    "TARGETDIR::SourceDir"
+                }, dirSymbols.OrderBy(d => d.Id.Id).Select(d => d.Id.Id + ":" + d.ParentDirectoryRef + ":" + d.Name).ToArray());
+            }
+        }
+
         [Fact]
         public void CanGet32bitProgramFiles6432Folder()
         {

src/wix/test/WixToolsetTest.CoreIntegration/MsiFixture.cs

@@ -38,7 +38,7 @@ public void CanBuildSingleFile()
 
                 Assert.True(File.Exists(Path.Combine(baseFolder, @"bin\test.msi")));
                 Assert.True(File.Exists(Path.Combine(baseFolder, @"bin\test.wixpdb")));
-                Assert.True(File.Exists(Path.Combine(baseFolder, @"bin\PFiles\MsiPackage\test.txt")));
+                Assert.True(File.Exists(Path.Combine(baseFolder, @"bin\PFiles\Example Corporation MsiPackage\test.txt")));
 
                 var intermediate = Intermediate.Load(Path.Combine(baseFolder, @"bin\test.wixpdb"));
 

src/wix/test/WixToolsetTest.CoreIntegration/TestData/SingleFile/Package.wxs

@@ -1,17 +1,9 @@
 <Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
   <Package Name="MsiPackage" Codepage="1252" Language="1033" Version="1.0.0.0" Manufacturer="Example Corporation" UpgradeCode="047730a5-30fe-4a62-a520-da9381b8226a" Compressed="no" InstallerVersion="200" Scope="perMachine">
-
-
     <MajorUpgrade DowngradeErrorMessage="!(loc.DowngradeError)" />
 
     <Feature Id="ProductFeature" Title="!(loc.FeatureTitle)">
       <ComponentGroupRef Id="ProductComponents" />
     </Feature>
   </Package>
-
-  <Fragment>
-    <StandardDirectory Id="ProgramFilesFolder">
-      <Directory Id="INSTALLFOLDER" Name="MsiPackage" SourceName="." />
-    </StandardDirectory>
-  </Fragment>
 </Wix>