Support for .NET SDK 9

Author: NikolayPianikov

Build/Build.csproj

@@ -2,7 +2,7 @@
 
     <PropertyGroup>
         <OutputType>Exe</OutputType>
-        <TargetFramework>$(Framework)</TargetFramework>
+        <TargetFramework>net8.0</TargetFramework>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
         <IsPackable>false</IsPackable>

Build/Program.cs

@@ -8,7 +8,6 @@
 const string packageId = "CSharpInteractive";
 const string toolPackageId = "dotnet-csi";
 const string templatesPackageId = "CSharpInteractive.Templates";
-var frameworks = new[] {"net6.0", "net7.0", "net8.0", "net9.0"};
 
 var currentDir = Environment.CurrentDirectory;
 if (!File.Exists(solutionFile))
@@ -40,6 +39,19 @@
 
 Info(packageVersion.ToString());
 
+const int minSdk = 6;
+var maxSdk = minSdk;
+new DotNet().WithVersion(true)
+    .Run(output => maxSdk = NuGetVersion.Parse(output.Line).Major)
+    .EnsureSuccess();
+
+var allFrameworks = Enumerable.Range(6, maxSdk - minSdk + 1).Select(i => $"net{i}.0").ToArray();
+var frameworks = string.Join(";", allFrameworks);
+var framework = $"net{maxSdk}.0";
+
+Info($"frameworks: {frameworks}");
+Info($"framework: {framework}");
+
 var packages = new[]
 {
     new PackageInfo(
@@ -226,9 +238,9 @@
     .AddSources(templateOutputDir)
     .Run().EnsureSuccess();
 
-foreach (var framework in frameworks)
+foreach (var checkingFramework in allFrameworks)
 {
-    CheckCompatibilityAsync(framework, packageVersion, defaultNuGetSource, outputDir);
+    CheckCompatibilityAsync(checkingFramework, packageVersion, defaultNuGetSource, outputDir);
 }
 
 if (!skipTests && (integrationTests || dockerLinuxTests))
@@ -263,7 +275,7 @@
 return 0;
 
 void CheckCompatibilityAsync(
-    string framework,
+    string checkingFramework,
     NuGetVersion nuGetVersion,
     string nuGetSource,
     string output)
@@ -276,7 +288,7 @@ void CheckCompatibilityAsync(
         new DotNetNew()
             .WithTemplateName("build")
             .WithNoRestore(true)
-            .WithArgs($"--version={nuGetVersion}", "-T", framework)
+            .WithArgs($"--version={nuGetVersion}", "-T", checkingFramework)
             .WithWorkingDirectory(buildProjectDir)
             .Run().EnsureSuccess();
 
@@ -289,7 +301,7 @@ void CheckCompatibilityAsync(
             .WithWorkingDirectory(buildProjectDir)
             .WithNoRestore(true)
             .WithNoBuild(true)
-            .WithFramework(framework)
+            .WithFramework(checkingFramework)
             .Run().EnsureSuccess();
 
         new DotNetCsi()

CSharpInteractive.HostApi/Internal/DotNet/DotNetCommandLineExtensions.cs

@@ -145,16 +145,21 @@ public static CommandLine AddProps(this CommandLine cmd, string propertyName, pa
     // ReSharper disable once UnusedParameter.Global
     public static string[] ToArgs<T>(this T value, string name, string collectionSeparator)
     {
+        var valueStr = value?.ToString();
+        if (string.IsNullOrWhiteSpace(valueStr))
+        {
+            return [];
+        }
+        
         if (!string.IsNullOrWhiteSpace(collectionSeparator))
         {
             return [$"{name}{collectionSeparator}{value}"];
         }
 
-        var valueStr = value?.ToString();
-        return string.IsNullOrWhiteSpace(valueStr) ? [] : [name, valueStr!];
+        return [name, valueStr!];
     }
 
-    public static string[] ToArgs<T>(this IEnumerable<(string name, T value) > values, string name, string separator)
+    public static string[] ToArgs<T>(this IEnumerable<(string name, T value)> values, string name, string separator)
     {
         return values.SelectMany(i => new [] { name, $"{i.name}{separator}{i.value}"}).ToArray();
     }

CSharpInteractive.Tests/CSharpInteractive.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFrameworks>net6.0;$(Framework)</TargetFrameworks>
+        <TargetFrameworks>net6.0;net8.0</TargetFrameworks>
         <IsPackable>false</IsPackable>
         <ImplicitUsings>enable</ImplicitUsings>
         <DefineConstants>$(DefineConstants);PUREDI_API_SUPPRESSION</DefineConstants>

CSharpInteractive.Tests/Integration/TeamCityScriptRunTests.cs

@@ -126,6 +126,6 @@ public void ShouldSendBuildProblemWhenScripIsUncompleted()
         result.ExitCode.ShouldBe(1);
         result.StdErr.ShouldBeEmpty();
         var messages = result.StdOut.ParseMessages();
-        messages.ShouldContainBuildProblem(i => i.Contains("; expected"), i => i.Contains("CS1002"));
+        messages.ShouldContainBuildProblem(i => i.Contains("script.csx(1,9): error CS1002"), i => i.Contains("CS1002"));
     }
 }