Add default major upgrade.

src/api/wix/WixToolset.Data/Symbols/WixPackageSymbol.cs

@@ -46,6 +46,12 @@ public enum WixPackageAttributes
         PerMachine = 0x1,
     }
 
+    public enum WixPackageUpgradeStrategy
+    {
+        None = 0x0,
+        MajorUpgrade = 0x1,
+    }
+
     public class WixPackageSymbol : IntermediateSymbol
     {
         public WixPackageSymbol() : base(SymbolDefinitions.WixPackage, null, null)
@@ -106,6 +112,12 @@ public string Codepage
             set => this.Set((int)WixPackageSymbolFields.Codepage, value);
         }
 
+        public WixPackageUpgradeStrategy UpgradeStrategy
+        {
+            get => (WixPackageUpgradeStrategy)this.Fields[(int)WixPackageSymbolFields.Attributes].AsNumber();
+            set => this.Set((int)WixPackageSymbolFields.Attributes, (int)value);
+        }
+
         public bool PerMachine => (this.Attributes & WixPackageAttributes.PerMachine) == WixPackageAttributes.PerMachine;
     }
 }

src/api/wix/WixToolset.Data/WixStandardLibrary.cs

@@ -32,7 +32,17 @@ public static Intermediate Build(Platform platform)
 
         private static IEnumerable<Localization> YieldLocalizations()
         {
-            var strings = new BindVariable[0];
+            var sourceLineNumber = new SourceLineNumber("wixstd.wixlib");
+
+            var strings = new[] {
+                new BindVariable()
+                {
+                    SourceLineNumbers = sourceLineNumber,
+                    Id = "WixDowngradePreventedMessage",
+                    Value = "A newer version of [ProductName] is already installed.",
+                    Overridable = true,
+                },
+            };
 
             var localizedControls = new LocalizedControl[0];
 

src/api/wix/WixToolset.Data/WixStandardLibraryIdentifiers.cs

@@ -21,5 +21,10 @@ public static class WixStandardLibraryIdentifiers
         /// Default feature name.
         /// </summary>
         public static readonly string DefaultFeatureName = "WixDefaultFeature";
+
+        /// <summary>
+        /// WiX Standard localization strings.
+        /// </summary>
+        public static readonly string WixStandardLocalizationStrings = "WixStandardLocalizationStrings";
     }
 }

src/wix/WixToolset.Core/Compiler_Package.cs

@@ -41,6 +41,7 @@ private void ParsePackageElement(XElement node)
             var isPackageNameSet = false;
             var isKeywordsSet = false;
             var isPackageAuthorSet = false;
+            var upgradeStrategy = WixPackageUpgradeStrategy.MajorUpgrade;
 
             this.GetDefaultPlatformAndInstallerVersion(out var platform, out var msiVersion);
 
@@ -111,6 +112,21 @@ private void ParsePackageElement(XElement node)
                     case "UpgradeCode":
                         upgradeCode = this.Core.GetAttributeGuidValue(sourceLineNumbers, attrib, false);
                         break;
+                    case "UpgradeStrategy":
+                        var strategy = this.Core.GetAttributeValue(sourceLineNumbers, attrib);
+                        switch (strategy)
+                        {
+                            case "majorUpgrade":
+                                upgradeStrategy = WixPackageUpgradeStrategy.MajorUpgrade;
+                                break;
+                            case "none":
+                                upgradeStrategy = WixPackageUpgradeStrategy.None;
+                                break;
+                            default:
+                                this.Core.Write(ErrorMessages.IllegalAttributeValue(sourceLineNumbers, node.Name.LocalName, attrib.Name.LocalName, strategy, "majorUpgrade", "none"));
+                                break;
+                        }
+                        break;
                     case "Version":
                         version = this.Core.GetAttributeVersionValue(sourceLineNumbers, attrib);
                         break;
@@ -382,6 +398,7 @@ private void ParsePackageElement(XElement node)
                         Manufacturer = manufacturer,
                         Attributes = isPerMachine ? WixPackageAttributes.PerMachine : WixPackageAttributes.None,
                         Codepage = codepage,
+                        UpgradeStrategy = upgradeStrategy,
                     });
 
                     if (!isCommentsSet)

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

@@ -2,6 +2,7 @@
 
 namespace WixToolset.Core.Link
 {
+    using System;
     using System.Collections.Generic;
     using System.Linq;
     using WixToolset.Data;
@@ -49,20 +50,80 @@ public void Execute()
                     }
                 );
             }
+
+            var symbols = this.Sections.SelectMany(section => section.Symbols);
+            var upgradeSymbols = symbols.OfType<UpgradeSymbol>();
+            if (!upgradeSymbols.Any())
+            {
+                var packageSymbol = this.Find.EntrySection.Symbols.OfType<WixPackageSymbol>().FirstOrDefault();
+
+                if (packageSymbol?.UpgradeStrategy == WixPackageUpgradeStrategy.MajorUpgrade
+                    && !String.IsNullOrEmpty(packageSymbol?.UpgradeCode))
+                {
+                    this.AddDefaultMajorUpgrade(packageSymbol);
+                }
+            }
+        }
+
+        private void AddDefaultMajorUpgrade(WixPackageSymbol packageSymbol)
+        {
+            this.AddSymbols(this.Find.EntrySection,
+                new UpgradeSymbol(packageSymbol.SourceLineNumbers)
+                {
+                    UpgradeCode = packageSymbol.UpgradeCode,
+                    MigrateFeatures = true,
+                    ActionProperty = WixUpgradeConstants.UpgradeDetectedProperty,
+                    VersionMax = packageSymbol.Version,
+                    Language = packageSymbol.Language,
+                },
+                new UpgradeSymbol(packageSymbol.SourceLineNumbers)
+                {
+                    UpgradeCode = packageSymbol.UpgradeCode,
+                    VersionMin = packageSymbol.Version,
+                    Language = packageSymbol.Language,
+                    OnlyDetect = true,
+                    ActionProperty = WixUpgradeConstants.DowngradeDetectedProperty,
+                },
+                new LaunchConditionSymbol(packageSymbol.SourceLineNumbers)
+                {
+                    Condition = WixUpgradeConstants.DowngradePreventedCondition,
+                    Description = "!(loc.WixDowngradePreventedMessage)",
+                },
+                new WixActionSymbol(packageSymbol.SourceLineNumbers,
+                    new Identifier(AccessModifier.Global, SequenceTable.InstallExecuteSequence, "RemoveExistingProducts"))
+                {
+                    SequenceTable = SequenceTable.InstallExecuteSequence,
+                    Action = "RemoveExistingProducts",
+                    After = "InstallValidate",
+                },
+                new WixSimpleReferenceSymbol(packageSymbol.SourceLineNumbers)
+                {
+                    Table = SymbolDefinitions.WixAction.Name,
+                    PrimaryKeys = "InstallExecuteSequence/InstallValidate",
+                });
         }
 
         private void AddSymbolsToNewSection(string sectionId, params IntermediateSymbol[] symbols)
         {
             var section = new IntermediateSection(sectionId, SectionType.Fragment);
+
             this.Sections.Add(section);
 
+            this.AddSymbols(section, symbols);
+        }
+
+        private void AddSymbols(IntermediateSection section, params IntermediateSymbol[] symbols)
+        {
             foreach (var symbol in symbols)
             {
                 section.AddSymbol(symbol);
 
-                var symbolWithSection = new SymbolWithSection(section, symbol);
-                var fullName = symbolWithSection.GetFullName();
-                this.Find.SymbolsByName.Add(fullName, symbolWithSection);
+                if (!String.IsNullOrEmpty(symbol.Id?.Id))
+                {
+                    var symbolWithSection = new SymbolWithSection(section, symbol);
+                    var fullName = symbolWithSection.GetFullName();
+                    this.Find.SymbolsByName.Add(fullName, symbolWithSection);
+                }
             }
         }
     }

src/wix/WixToolset.Core/Linker.cs

@@ -90,7 +90,7 @@ public Intermediate Link(ILinkContext context)
                         if (library.Localizations?.Count > 0)
                         {
                             // Include localizations from the extension data and be sure to note that the localization came from
-                            // an extension. It is important to remember whiche localization came from an extension when filtering
+                            // an extension. It is important to remember which localization came from an extension when filtering
                             // localizations during the resolve process later.
                             localizations.AddRange(library.Localizations.Select(l => l.UpdateLocation(LocalizationLocation.Extension)));
                         }
@@ -103,6 +103,11 @@ public Intermediate Link(ILinkContext context)
                     var stdlib = WixStandardLibrary.Build(this.Context.Platform);
 
                     sections.AddRange(stdlib.Sections);
+
+                    if (stdlib.Localizations?.Count > 0)
+                    {
+                        localizations.AddRange(stdlib.Localizations);
+                    }
                 }
 
                 var multipleFeatureComponents = new Hashtable();

src/wix/test/WixToolsetTest.CoreIntegration/TestData/DefaultMajorUpgrade/DefaultMajorUpgrade.wxs

@@ -0,0 +1,12 @@
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
+    <Package Name="MajorUpgradeDowngradeMessage" Language="1033" Version="2.0.0" Manufacturer="Example Corporation" UpgradeCode="7ab24276-c628-43db-9e65-a184d052909b" Scope="perMachine">
+        <Feature Id="ProductFeature" Title="MsiPackageTitle">
+        </Feature>
+    </Package>
+
+    <Fragment>
+        <StandardDirectory Id="ProgramFiles6432Folder">
+            <Directory Id="INSTALLFOLDER" Name="MsiPackage" />
+        </StandardDirectory>
+    </Fragment>
+</Wix>

src/wix/test/WixToolsetTest.CoreIntegration/TestData/DefaultMajorUpgradeNone/DefaultMajorUpgradeNone.wxs

@@ -0,0 +1,12 @@
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
+    <Package Name="MajorUpgradeDowngradeMessage" UpgradeStrategy="none" Language="1033" Version="2.0.0" Manufacturer="Example Corporation" UpgradeCode="7ab24276-c628-43db-9e65-a184d052909b" Scope="perMachine">
+        <Feature Id="ProductFeature" Title="MsiPackageTitle">
+        </Feature>
+    </Package>
+
+    <Fragment>
+        <StandardDirectory Id="ProgramFiles6432Folder">
+            <Directory Id="INSTALLFOLDER" Name="MsiPackage" />
+        </StandardDirectory>
+    </Fragment>
+</Wix>

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

@@ -58,6 +58,31 @@ public void MajorUpgradeDowngradeMessagePopulatesRowsAsExpected()
             }, results);
         }
 
+        [Fact]
+        public void DefaultMajorUpgradePopulatesUpgradeRowsAsExpected()
+        {
+            var folder = TestData.Get("TestData", "DefaultMajorUpgrade");
+            var build = new Builder(folder, new Type[] { }, new[] { folder });
+
+            var results = build.BuildAndQuery(Build, "Upgrade", "LaunchCondition");
+            WixAssert.CompareLineByLine(new[]
+            {
+                "LaunchCondition:NOT WIX_DOWNGRADE_DETECTED\tA newer version of [ProductName] is already installed.",
+                "Upgrade:{7AB24276-C628-43DB-9E65-A184D052909B}\t\t2.0.0\t1033\t1\t\tWIX_UPGRADE_DETECTED",
+                "Upgrade:{7AB24276-C628-43DB-9E65-A184D052909B}\t2.0.0\t\t1033\t2\t\tWIX_DOWNGRADE_DETECTED",
+            }, results);
+        }
+
+        [Fact]
+        public void UpgradeStrategyNoneDoesNotCreateDefaultMajorUpgrade()
+        {
+            var folder = TestData.Get("TestData", "DefaultMajorUpgradeNone");
+            var build = new Builder(folder, new Type[] { }, new[] { folder });
+
+            var results = build.BuildAndQuery(Build, "Upgrade", "LaunchCondition");
+            Assert.Empty(results);
+        }
+
         private static void Build(string[] args)
         {
             var result = WixRunner.Execute(args);