Basic support for aliasing in restore

src/NuGet.Clients/NuGet.PackageManagement.VisualStudio/Projects/LegacyPackageReferenceProject.cs

@@ -479,6 +479,7 @@ private async Task<PackageSpec> GetPackageSpecAsync(ISettings settings)
                 FrameworkName = targetFramework,
                 Warn = warn,
                 PackagesToPrune = packagesToPrune,
+                TargetAlias = targetFramework.ToString(),
             };
 
             // Build up runtime information.

src/NuGet.Clients/NuGet.VisualStudio.Implementation/SolutionExplorer/Models/AssetsFileDependenciesSnapshot.cs

@@ -96,11 +96,11 @@ private AssetsFileDependenciesSnapshot(LockFile? lockFile, AssetsFileDependencie
                     continue;
                 }
 
-                string targetAlias = GetTargetAlias(lockFileTarget.Name);
+                string targetAlias = lockFileTarget.TargetAlias;
 
                 previous.DataByTarget.TryGetValue(targetAlias, out AssetsFileTarget? previousTarget);
 
-                ImmutableArray<AssetsFileLogMessage> logMessages = ParseLogMessages(lockFile, previousTarget, lockFileTarget.Name);
+                ImmutableArray<AssetsFileLogMessage> logMessages = ParseLogMessages(lockFile, previousTarget, targetAlias);
 
                 dataByTarget.Add(
                     targetAlias,
@@ -114,34 +114,6 @@ private AssetsFileDependenciesSnapshot(LockFile? lockFile, AssetsFileDependencie
             DataByTarget = dataByTarget.ToImmutable();
             return;
 
-            string GetTargetAlias(string lockFileTargetName)
-            {
-                // In some places, the target alias specified in the project file (e.g. "net472") will not
-                // match the target name used throughout the lock file (e.g. ".NETFramework,Version=v4.7.2").
-                // The dependencies tree only uses the target alias (what's in the project file) so we need
-                // to map back to that. See https://github.com/dotnet/project-system/issues/6832.
-
-                if (lockFile.PackageSpec.TargetFrameworks.Any(t => t.TargetAlias == lockFileTargetName))
-                {
-                    // The target name used in the assets file matches the target alias in the project file.
-                    return lockFileTargetName;
-                }
-
-                // The target name used in the assets file does NOT match any target alias in the project.
-                // Attempt to find the name used in the project.
-                foreach (TargetFrameworkInformation targetInfo in lockFile.PackageSpec.TargetFrameworks)
-                {
-                    if (targetInfo.FrameworkName.DotNetFrameworkName == lockFileTargetName)
-                    {
-                        // We found a match, so return the alias.
-                        return targetInfo.TargetAlias;
-                    }
-                }
-
-                // No match was found. Not ideal. Nothing to do but return the original value.
-                return lockFileTargetName;
-            }
-
             static ImmutableArray<AssetsFileLogMessage> ParseLogMessages(LockFile lockFile, AssetsFileTarget? previousTarget, string target)
             {
                 if (lockFile.LogMessages.Count == 0)

src/NuGet.Core/NuGet.Build.Tasks.Console/MSBuildStaticGraphRestore.cs

@@ -752,7 +752,7 @@ internal static List<TargetFrameworkInformation> GetTargetFrameworkInfos(IReadOn
                     FrameworkReferences = GetFrameworkReferences(msBuildProjectInstance),
                     PackagesToPrune = prunedReferences,
                     RuntimeIdentifierGraphPath = msBuildProjectInstance.GetProperty(nameof(TargetFrameworkInformation.RuntimeIdentifierGraphPath)),
-                    TargetAlias = targetAlias,
+                    TargetAlias = string.IsNullOrEmpty(targetAlias) ? targetFramework.ToString() : targetAlias,
                     Warn = warn
                 };
 

src/NuGet.Core/NuGet.Commands/PublicAPI/net472/PublicAPI.Unshipped.txt

@@ -1,3 +1,5 @@
 #nullable enable
 ~NuGet.Commands.IRestoreTargetGraph.TargetAlias.get -> string
+~NuGet.Commands.IRestoreTargetGraph.TargetGraphNameWithAlias.get -> string
 ~NuGet.Commands.RestoreTargetGraph.TargetAlias.get -> string
+~NuGet.Commands.RestoreTargetGraph.TargetGraphNameWithAlias.get -> string

src/NuGet.Core/NuGet.Commands/PublicAPI/net8.0/PublicAPI.Unshipped.txt

@@ -1,3 +1,5 @@
 #nullable enable
 ~NuGet.Commands.IRestoreTargetGraph.TargetAlias.get -> string
+~NuGet.Commands.IRestoreTargetGraph.TargetGraphNameWithAlias.get -> string
 ~NuGet.Commands.RestoreTargetGraph.TargetAlias.get -> string
+~NuGet.Commands.RestoreTargetGraph.TargetGraphNameWithAlias.get -> string

src/NuGet.Core/NuGet.Commands/RestoreCommand/CompatibilityChecker.cs

@@ -230,7 +230,7 @@ internal async Task<CompatibilityCheckResult> CheckAsync(
         /// </summary>
         private static RestoreLogMessage GetErrorMessage(NuGetLogCode logCode, CompatibilityIssue issue, RestoreTargetGraph graph)
         {
-            return RestoreLogMessage.CreateError(logCode, issue.Format(), issue.Package.Id, graph.TargetGraphName);
+            return RestoreLogMessage.CreateError(logCode, issue.Format(), issue.Package.Id, graph.TargetGraphNameWithAlias);
         }
 
         private static IEnumerable<NuGetFramework> GetPackageFrameworks(

src/NuGet.Core/NuGet.Commands/RestoreCommand/Diagnostics/UnexpectedDependencyMessages.cs

@@ -78,7 +78,7 @@ public static IEnumerable<RestoreLogMessage> GetMissingLowerBounds(IEnumerable<I
                                             .OrderBy(e => e.Child.Name, StringComparer.OrdinalIgnoreCase)
                                             .ThenBy(e => e.Child.Version)
                                             .ThenBy(e => e.Parent.Name, StringComparer.OrdinalIgnoreCase)
-                                            .Select(e => GetMissingLowerBoundMessage(e, graph.TargetGraphName)));
+                                            .Select(e => GetMissingLowerBoundMessage(e, graph.TargetGraphNameWithAlias)));
             }
 
             return messages;
@@ -159,7 +159,7 @@ public static IEnumerable<RestoreLogMessage> GetBumpedUpDependencies(
                                     match.Key.Name,
                                     match.Key.Version);
 
-                                var graphName = indexedGraph.Graph.TargetGraphName;
+                                var graphName = indexedGraph.Graph.TargetGraphNameWithAlias;
 
                                 messages.Add(RestoreLogMessage.CreateWarning(NuGetLogCode.NU1601, message, match.Key.Name, graphName));
                             }
@@ -290,7 +290,7 @@ public static IEnumerable<RestoreLogMessage> GetDependenciesAboveUpperBounds(Lis
                                             child,
                                             actual);
 
-                                        messages.Add(RestoreLogMessage.CreateWarning(NuGetLogCode.NU1608, message, dependencyId, graph.TargetGraphName));
+                                        messages.Add(RestoreLogMessage.CreateWarning(NuGetLogCode.NU1608, message, dependencyId, graph.TargetGraphNameWithAlias));
                                     }
                                 }
                             }

src/NuGet.Core/NuGet.Commands/RestoreCommand/Diagnostics/UnresolvedMessages.cs

@@ -33,7 +33,7 @@ internal static async Task LogAsync(IEnumerable<IRestoreTargetGraph> graphs, Rem
         {
             var tasks = graphs.SelectMany(graph => graph.Unresolved.Select(e =>
             GetMessageAsync(
-                graph.TargetGraphName,
+                graph.TargetGraphNameWithAlias,
                 e,
                 context.FilterDependencyProvidersForLibrary(e),
                 context.PackageSourceMapping.IsEnabled,

src/NuGet.Core/NuGet.Commands/RestoreCommand/IRestoreTargetGraph.cs

@@ -12,6 +12,8 @@ namespace NuGet.Commands
 {
     public interface IRestoreTargetGraph
     {
+        string TargetGraphNameWithAlias { get; }
+
         string TargetGraphName { get; }
 
         /// <summary>

src/NuGet.Core/NuGet.Commands/RestoreCommand/LockFileBuilder.cs

@@ -50,11 +50,7 @@ public LockFile CreateLockFile(LockFile previousLockFile,
 
             if (project.RestoreMetadata?.ProjectStyle == ProjectStyle.PackageReference)
             {
-                AddProjectFileDependenciesForPackageReference(project, lockFile, targetGraphs);
-            }
-            else
-            {
-                AddProjectFileDependenciesForSpec(project, lockFile);
+                AddProjectFileDependenciesForPackageReference(project, lockFile, targetGraphs.AsList());
             }
 
             // Record all libraries used
@@ -164,12 +160,20 @@ public LockFile CreateLockFile(LockFile previousLockFile,
                 .OrderBy(graph => graph.Framework.ToString(), StringComparer.Ordinal)
                 .ThenBy(graph => graph.RuntimeIdentifier, StringComparer.Ordinal))
             {
-                var target = new LockFileTarget
-                {
-                    TargetFramework = targetGraph.Framework,
-                    RuntimeIdentifier = targetGraph.RuntimeIdentifier,
-                    TargetAlias = targetGraph.TargetAlias,
-                };
+                var target = lockFile.Version >= 4 ?
+                    new LockFileTarget
+                    {
+                        TargetFramework = targetGraph.Framework,
+                        RuntimeIdentifier = targetGraph.RuntimeIdentifier,
+                        TargetAlias = targetGraph.TargetAlias,
+                        Name = targetGraph.TargetGraphNameWithAlias
+                    } :
+                    new LockFileTarget
+                    {
+                        TargetFramework = targetGraph.Framework,
+                        RuntimeIdentifier = targetGraph.RuntimeIdentifier,
+                        TargetAlias = targetGraph.TargetAlias,
+                    };
 
                 var flattenedFlags = IncludeFlagUtils.FlattenDependencyTypes(_includeFlagGraphs, project, targetGraph);
 
@@ -266,7 +270,7 @@ public LockFile CreateLockFile(LockFile previousLockFile,
                                     NuGetLogCode.NU1701,
                                     message,
                                     library.Name,
-                                    targetGraph.TargetGraphName);
+                                    targetGraph.TargetGraphNameWithAlias);
 
                                 _logger.Log(logMessage);
 
@@ -391,42 +395,25 @@ private static string GetFallbackFrameworkString(NuGetFramework framework)
             return string.Join(", ", frameworks);
         }
 
-        private static void AddProjectFileDependenciesForSpec(PackageSpec project, LockFile lockFile)
+        private static void AddProjectFileDependenciesForPackageReference(PackageSpec project, LockFile lockFile, List<RestoreTargetGraph> targetGraphs)
         {
-            // Use empty string as the key of dependencies shared by all frameworks
-            lockFile.ProjectFileDependencyGroups.Add(new ProjectFileDependencyGroup(
-                string.Empty,
-                project.Dependencies
-                    .Select(group => group.LibraryRange.ToLockFileDependencyGroupString())
-                    .OrderBy(group => group, StringComparer.Ordinal)));
+            bool isV4LockFile = lockFile.Version >= 4;
 
             foreach (var frameworkInfo in project.TargetFrameworks
-                .OrderBy(framework => framework.FrameworkName.ToString(),
-                    StringComparer.Ordinal))
-            {
-                lockFile.ProjectFileDependencyGroups.Add(new ProjectFileDependencyGroup(
-                    frameworkInfo.FrameworkName.ToString(),
-                    frameworkInfo.Dependencies
-                        .Select(x => x.LibraryRange.ToLockFileDependencyGroupString())
-                        .OrderBy(dependency => dependency, StringComparer.Ordinal)));
-            }
-        }
-
-        private static void AddProjectFileDependenciesForPackageReference(PackageSpec project, LockFile lockFile, IEnumerable<RestoreTargetGraph> targetGraphs)
-        {
-            // For NETCore put everything under a TFM section
-            // Projects are included for NETCore
-            foreach (var frameworkInfo in project.TargetFrameworks
-                .OrderBy(framework => framework.FrameworkName.ToString(),
+                .OrderBy(framework => framework.TargetAlias,
                     StringComparer.Ordinal))
             {
                 var dependencies = new List<LibraryRange>();
                 dependencies.AddRange(project.Dependencies.Select(e => e.LibraryRange));
                 dependencies.AddRange(frameworkInfo.Dependencies.Select(e => e.LibraryRange));
 
-                var targetGraph = targetGraphs.SingleOrDefault(graph =>
-                    graph.Framework.Equals(frameworkInfo.FrameworkName)
-                    && string.IsNullOrEmpty(graph.RuntimeIdentifier));
+                RestoreTargetGraph targetGraph = !string.IsNullOrEmpty(frameworkInfo.TargetAlias) ?
+                    targetGraphs.SingleOrDefault(graph =>
+                        graph.TargetAlias.Equals(frameworkInfo.TargetAlias)
+                        && string.IsNullOrEmpty(graph.RuntimeIdentifier)) :
+                    targetGraphs.SingleOrDefault(graph =>
+                        graph.Framework.Equals(frameworkInfo.FrameworkName)
+                        && string.IsNullOrEmpty(graph.RuntimeIdentifier));
 
                 var resolvedEntry = targetGraph?
                     .Flattened
@@ -452,8 +439,9 @@ private static void AddProjectFileDependenciesForPackageReference(PackageSpec pr
                 }
 
                 // Add entry
+                string framework = isV4LockFile && string.IsNullOrEmpty(frameworkInfo.TargetAlias) ? frameworkInfo.FrameworkName.ToString() : frameworkInfo.TargetAlias;
                 var dependencyGroup = new ProjectFileDependencyGroup(
-                    frameworkInfo.FrameworkName.ToString(),
+                    framework,
                     uniqueDependencies.Select(x => x.ToLockFileDependencyGroupString())
                         .OrderBy(dependency => dependency, StringComparer.Ordinal));
 

src/NuGet.Core/NuGet.Commands/RestoreCommand/ProjectRestoreCommand.cs

@@ -52,6 +52,8 @@ public async Task<Tuple<bool, List<RestoreTargetGraph>, RuntimeGraph>> TryRestor
             TelemetryActivity telemetryActivity,
             string telemetryPrefix)
         {
+            // Aliasing should only be supported in new world.
+            // TODO NK - this is where we do the splitting
             var allRuntimes = RuntimeGraph.Empty;
             var frameworkTasks = new List<Task<RestoreTargetGraph>>();
             var graphs = new List<RestoreTargetGraph>();
@@ -315,7 +317,7 @@ internal async Task<bool> ResolutionSucceeded(IEnumerable<RestoreTargetGraph> gr
                             string.Join(", ", conflict.Requests),
                             graphName);
 
-                        _logger.Log(RestoreLogMessage.CreateError(NuGetLogCode.NU1106, message, conflict.Name, graph.TargetGraphName));
+                        _logger.Log(RestoreLogMessage.CreateError(NuGetLogCode.NU1106, message, conflict.Name, graph.TargetGraphNameWithAlias));
                     }
                 }
 

src/NuGet.Core/NuGet.Commands/RestoreCommand/RequestFactory/RestoreArgs.cs

@@ -201,6 +201,8 @@ public void ApplyStandardProperties(RestoreRequest request)
 
             request.RequestedRuntimes.UnionWith(Runtimes);
             request.FallbackRuntimes.UnionWith(FallbackRuntimes);
+
+            // TODO NK - set-up the lock file version here.
             request.LockFileVersion = LockFileFormat.Version;
 
             // Run runtime asset checks for project.json, and for other types if enabled.