Rename 'dotnet interactive' to 'dotnet repl'

src/Microsoft.DotNet.Tools.Repl.Csi/Program.cs

@@ -0,0 +1,38 @@
+using System;
+using System.IO;
+using Microsoft.Dnx.Runtime.Common.CommandLine;
+using Microsoft.DotNet.Cli.Utils;
+
+namespace Microsoft.DotNet.Tools.Repl.Csi
+{
+    public sealed class Program
+    {
+        public static int Main(string[] args)
+        {
+            DebugHelper.HandleDebugSwitch(ref args);
+
+            var app = new CommandLineApplication();
+            app.Name = "dotnet repl csi";
+            app.FullName = "C# REPL";
+            app.Description = "C# REPL for the .NET platform";
+            app.HelpOption("-h|--help");
+            var script = app.Argument("<SCRIPT>", "The .csx file to run. Defaults to interactive mode.");
+
+            app.OnExecute(() => Run(script.Value));
+            return app.Execute(args);
+        }
+
+        private static int Run(string scriptOpt)
+        {
+            var corerun = Path.Combine(AppContext.BaseDirectory, Constants.HostExecutableName);
+            var csiExe = Path.Combine(AppContext.BaseDirectory, "csi.exe");
+            var csiArgs = string.IsNullOrEmpty(scriptOpt) ? "-i" : scriptOpt;
+            var command = File.Exists(corerun) && File.Exists(csiExe) ?
+                Command.Create(corerun, $@"""{csiExe}"" {csiArgs}") :
+                Command.Create(csiExe, csiArgs);
+            command = command.ForwardStdOut().ForwardStdErr();
+            var result = command.Execute();
+            return result.ExitCode;
+        }
+    }
+}