Add Spectre.Cli to Spectre.Console

* Renames Spectre.Cli to Spectre.Console.Cli.
* Now uses Verify with Spectre.Console.Cli tests.
* Removes some duplicate definitions.

Closes #168

examples/Cli/Injection/Commands/DefaultCommand.cs

@@ -0,0 +1,30 @@
+using System;
+using System.ComponentModel;
+using Spectre.Console.Cli;
+
+namespace Injection.Commands
+{
+    public sealed class DefaultCommand : Command<DefaultCommand.Settings>
+    {
+        private readonly IGreeter _greeter;
+
+        public sealed class Settings : CommandSettings
+        {
+            [CommandOption("-n|--name <NAME>")]
+            [Description("The person or thing to greet.")]
+            [DefaultValue("World")]
+            public string Name { get; set; }
+        }
+
+        public DefaultCommand(IGreeter greeter)
+        {
+            _greeter = greeter ?? throw new ArgumentNullException(nameof(greeter));
+        }
+
+        public override int Execute(CommandContext context, Settings settings)
+        {
+            _greeter.Greet(settings.Name);
+            return 0;
+        }
+    }
+}

examples/Cli/Injection/IGreeter.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace Injection
+{
+    public interface IGreeter
+    {
+        void Greet(string name);
+    }
+
+    public sealed class HelloWorldGreeter : IGreeter
+    {
+        public void Greet(string name)
+        {
+            Console.WriteLine($"Hello {name}!");
+        }
+    }
+}

examples/Cli/Injection/Infrastructure/TypeRegistrar.cs

@@ -0,0 +1,31 @@
+using System;
+using Microsoft.Extensions.DependencyInjection;
+using Spectre.Console.Cli;
+
+namespace Injection
+{
+    public sealed class TypeRegistrar : ITypeRegistrar
+    {
+        private readonly IServiceCollection _builder;
+
+        public TypeRegistrar(IServiceCollection builder)
+        {
+            _builder = builder;
+        }
+
+        public ITypeResolver Build()
+        {
+            return new TypeResolver(_builder.BuildServiceProvider());
+        }
+
+        public void Register(Type service, Type implementation)
+        {
+            _builder.AddSingleton(service, implementation);
+        }
+
+        public void RegisterInstance(Type service, object implementation)
+        {
+            _builder.AddSingleton(service, implementation);
+        }
+    }
+}

examples/Cli/Injection/Infrastructure/TypeResolver.cs

@@ -0,0 +1,21 @@
+using System;
+using Microsoft.Extensions.DependencyInjection;
+using Spectre.Console.Cli;
+
+namespace Injection
+{
+    public sealed class TypeResolver : ITypeResolver
+    {
+        private readonly IServiceProvider _provider;
+
+        public TypeResolver(IServiceProvider provider)
+        {
+            _provider = provider ?? throw new ArgumentNullException(nameof(provider));
+        }
+
+        public object Resolve(Type type)
+        {
+            return _provider.GetRequiredService(type);
+        }
+    }
+}

examples/Cli/Injection/Injection.csproj

@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net5.0</TargetFramework>
+    <IsPackable>false</IsPackable>
+    <ExampleName>Injection</ExampleName>
+    <ExampleDescription>Demonstrates how to use dependency injection with Spectre.Cli.</ExampleDescription>
+    <ExampleGroup>Cli</ExampleGroup>
+    <ExampleVisible>false</ExampleVisible>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.1.8" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\src\Spectre.Console\Spectre.Console.csproj" />
+  </ItemGroup>
+
+</Project>

examples/Cli/Injection/Program.cs

@@ -0,0 +1,23 @@
+using Injection.Commands;
+using Microsoft.Extensions.DependencyInjection;
+using Spectre.Console.Cli;
+
+namespace Injection
+{
+    public class Program
+    {
+        public static int Main(string[] args)
+        {
+            // Create a type registrar and register any dependencies.
+            // A type registrar is an adapter for a DI framework.
+            var registrations = new ServiceCollection();
+            registrations.AddSingleton<IGreeter, HelloWorldGreeter>();
+            var registrar = new TypeRegistrar(registrations);
+
+            // Create a new command app with the registrar
+            // and run it with the provided arguments.
+            var app = new CommandApp<DefaultCommand>(registrar);
+            return app.Run(args);
+        }
+    }
+}