Adding TargetFrameworks even for single TFM and cleaning up PackageRef.

src/Microsoft.DotNet.ProjectJsonMigration/Rules/MigrateTFMRule.cs

@@ -16,18 +16,10 @@ namespace Microsoft.DotNet.ProjectJsonMigration.Rules
     public class MigrateTFMRule : IMigrationRule
     {
         private readonly ITransformApplicator _transformApplicator;
-        private readonly AddPropertyTransform<NuGetFramework>[] _transforms;
 
         public MigrateTFMRule(ITransformApplicator transformApplicator = null)
         {
             _transformApplicator = transformApplicator ?? new TransformApplicator();
-
-            _transforms = new AddPropertyTransform<NuGetFramework>[]
-            {
-                OutputPathTransform,
-                FrameworkIdentifierTransform,
-                FrameworkVersionTransform
-            };
         }
 
         public void Apply(MigrationSettings migrationSettings, MigrationRuleInputs migrationRuleInputs)
@@ -37,24 +29,14 @@ namespace Microsoft.DotNet.ProjectJsonMigration.Rules
 
             CleanExistingProperties(csproj);
 
-            if (migrationRuleInputs.ProjectContexts.Count() > 1)
+            _transformApplicator.Execute(
-            {
+                FrameworksTransform.Transform(migrationRuleInputs.ProjectContexts.Select(p => p.TargetFramework)),
-                _transformApplicator.Execute(
+                propertyGroup);
-                    FrameworksTransform.Transform(migrationRuleInputs.ProjectContexts.Select(p => p.TargetFramework)),
-                    propertyGroup);
-            }
-
-            foreach (var transform in _transforms)
-            {
-                _transformApplicator.Execute(
-                    transform.Transform(migrationRuleInputs.DefaultProjectContext.TargetFramework),
-                    propertyGroup);
-            }
         }
 
         private void CleanExistingProperties(ProjectRootElement csproj)
         {
-            var existingPropertiesToRemove = new string[] { "TargetFrameworkIdentifier", "TargetFrameworkVersion" };
+            var existingPropertiesToRemove = new string[] { "TargetFrameworkIdentifier", "TargetFrameworkVersion", "TargetFrameworks" };
             var properties = csproj.Properties.Where(p => existingPropertiesToRemove.Contains(p.Name));
 
             foreach (var property in properties)
@@ -63,6 +45,23 @@ namespace Microsoft.DotNet.ProjectJsonMigration.Rules
             }
         }
 
+        //TODO: this is a hack right now to clean packagerefs. This is not the final resting place for this piece of code
+        // @brthor will move it to its final location as part of this PackageRef PR: https://github.com/dotnet/cli/pull/4261
+        private void CleanExistingPackageReferences(ProjectRootElement outputMSBuildProject)
+        {
+            var packageRefs = outputMSBuildProject
+                .Items
+                .Where(i => i.ItemType == "PackageReference" && i.Include != ConstantPackageNames.CSdkPackageName)
+                .ToList();
+
+            foreach (var packageRef in packageRefs)
+            {
+                var parent = packageRef.Parent;
+                packageRef.Parent.RemoveChild(packageRef);
+                parent.RemoveIfEmpty();
+            }
+        }
+
         // Taken from private NuGet.Frameworks method
         // https://github.com/NuGet/NuGet.Client/blob/33b8f85a94b01f805f1e955f9b68992b297fad6e/src/NuGet.Core/NuGet.Frameworks/NuGetFramework.cs#L234
         private static string GetDisplayVersion(Version version)
@@ -83,21 +82,6 @@ namespace Microsoft.DotNet.ProjectJsonMigration.Rules
             return sb.ToString();
         }
 
-        // TODO: When we have this inferred in the sdk targets, we won't need this
-        private AddPropertyTransform<NuGetFramework> OutputPathTransform =>
-            new AddPropertyTransform<NuGetFramework>("OutputPath",
-                f => $"bin/$(Configuration)/{f.GetShortFolderName()}",
-                f => true);
-
-        private AddPropertyTransform<NuGetFramework> FrameworkIdentifierTransform =>
-            new AddPropertyTransform<NuGetFramework>("TargetFrameworkIdentifier",
-                f => f.Framework,
-                f => true);
-
-        private AddPropertyTransform<NuGetFramework> FrameworkVersionTransform =>
-            new AddPropertyTransform<NuGetFramework>("TargetFrameworkVersion",
-                f => "v" + GetDisplayVersion(f.Version),
-                f => true);
         private AddPropertyTransform<IEnumerable<NuGetFramework>> FrameworksTransform =>
             new AddPropertyTransform<IEnumerable<NuGetFramework>>("TargetFrameworks",
                 frameworks => string.Join(";", frameworks.Select(f => f.GetShortFolderName())),

src/dotnet/commands/dotnet-migrate/ProjectRootElementExtensions.cs

@@ -11,7 +11,7 @@ namespace Microsoft.DotNet.Tools.Migrate
             return projectRootElement
                 .Items
                 .Where(i => i.ItemType == "PackageReference")
-                .First(i=> i.Include == ConstantPackageNames.CSdkPackageName)
+                .First(i => i.Include == ConstantPackageNames.CSdkPackageName)
                 .GetMetadataWithName("version").Value;
         }
     }

test/dotnet-migrate.Tests/GivenThatIWantToMigrateTestApps.cs

@@ -29,7 +29,7 @@ namespace Microsoft.DotNet.Migration.Tests
         public void It_migrates_apps(string projectName)
         {
             var projectDirectory = TestAssetsManager.CreateTestInstance(projectName, callingMethod: "i").WithLockFiles().Path;
-            var outputComparisonData = BuildProjectJsonMigrateBuildMSBuild(projectDirectory);
+            var outputComparisonData = BuildProjectJsonMigrateBuildMSBuild(projectDirectory, projectName);
 
             var outputsIdentical =
                 outputComparisonData.ProjectJsonBuildOutputs.SetEquals(outputComparisonData.MSBuildBuildOutputs);
@@ -79,7 +79,7 @@ namespace Microsoft.DotNet.Migration.Tests
         {
             var projectDirectory =
                 TestAssetsManager.CreateTestInstance(projectName, callingMethod: "i").WithLockFiles().Path;
-            var outputComparisonData = BuildProjectJsonMigrateBuildMSBuild(projectDirectory);
+            var outputComparisonData = BuildProjectJsonMigrateBuildMSBuild(projectDirectory, projectName);
 
             var outputsIdentical =
                 outputComparisonData.ProjectJsonBuildOutputs.SetEquals(outputComparisonData.MSBuildBuildOutputs);
@@ -100,7 +100,7 @@ namespace Microsoft.DotNet.Migration.Tests
         {
             var projectDirectory =
                 TestAssetsManager.CreateTestInstance(projectName, callingMethod: "i").WithLockFiles().Path;
-            var outputComparisonData = BuildProjectJsonMigrateBuildMSBuild(projectDirectory);
+            var outputComparisonData = BuildProjectJsonMigrateBuildMSBuild(projectDirectory, projectName);
 
             var outputsIdentical =
                 outputComparisonData.ProjectJsonBuildOutputs.SetEquals(outputComparisonData.MSBuildBuildOutputs);
@@ -210,7 +210,8 @@ namespace Microsoft.DotNet.Migration.Tests
             File.Copy("NuGet.tempaspnetpatch.config", Path.Combine(projectDirectory, "NuGet.Config"));
             Restore(projectDirectory);
 
-            var outputComparisonData = BuildProjectJsonMigrateBuildMSBuild(projectDirectory);
+            var outputComparisonData =
+                BuildProjectJsonMigrateBuildMSBuild(projectDirectory, Path.GetFileNameWithoutExtension(projectDirectory));
             return outputComparisonData;
         }
 
@@ -227,7 +228,7 @@ namespace Microsoft.DotNet.Migration.Tests
             }
         }
 
-        private MigratedBuildComparisonData BuildProjectJsonMigrateBuildMSBuild(string projectDirectory)
+        private MigratedBuildComparisonData BuildProjectJsonMigrateBuildMSBuild(string projectDirectory, string projectName)
         {
             BuildProjectJson(projectDirectory);
             var projectJsonBuildOutputs = new HashSet<string>(CollectBuildOutputs(projectDirectory));
@@ -237,8 +238,8 @@ namespace Microsoft.DotNet.Migration.Tests
             File.Delete(Path.Combine(projectDirectory, "project.lock.json"));
 
             MigrateProject(projectDirectory);
-            Restore(projectDirectory);
+            Restore3(projectDirectory, projectName);
-            BuildMSBuild(projectDirectory);
+            BuildMSBuild(projectDirectory, projectName);
 
             var msbuildBuildOutputs = new HashSet<string>(CollectBuildOutputs(projectDirectory));
 
@@ -297,13 +298,22 @@ namespace Microsoft.DotNet.Migration.Tests
                 .Pass();
         }
 
-        private string BuildMSBuild(string projectDirectory, string configuration="Debug")
+        private void Restore3(string projectDirectory, string projectName)
+        {
+            new Restore3Command()
+                .WithWorkingDirectory(projectDirectory)
+                .Execute($"{projectName}.csproj")
+                .Should()
+                .Pass();
+        }
+
+        private string BuildMSBuild(string projectDirectory, string projectName, string configuration="Debug")
         {
             DeleteXproj(projectDirectory);
 
             var result = new Build3Command()
                 .WithWorkingDirectory(projectDirectory)
-                .ExecuteWithCapturedOutput($"/p:Configuration={configuration}");
+                .ExecuteWithCapturedOutput($"{projectName}.csproj /p:Configuration={configuration}");
 
             result
                 .Should()