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Add GenericHost playground sample (#912)
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‎System.CommandLine.sln

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@@ -56,6 +56,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "System.CommandLine.Hosting"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.CommandLine.Hosting.Tests", "src\System.CommandLine.Hosting.Tests\System.CommandLine.Hosting.Tests.csproj", "{39483140-BC26-4CAD-BBAE-3DC76C2F16CF}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HostingPlayground", "samples\HostingPlayground\HostingPlayground.csproj", "{0BF6958D-9EE3-4623-B3D6-4DA77EAC1906}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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{39483140-BC26-4CAD-BBAE-3DC76C2F16CF}.Release|x64.Build.0 = Release|Any CPU
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{39483140-BC26-4CAD-BBAE-3DC76C2F16CF}.Release|x86.ActiveCfg = Release|Any CPU
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{39483140-BC26-4CAD-BBAE-3DC76C2F16CF}.Release|x86.Build.0 = Release|Any CPU
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{0BF6958D-9EE3-4623-B3D6-4DA77EAC1906}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{0BF6958D-9EE3-4623-B3D6-4DA77EAC1906}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{0BF6958D-9EE3-4623-B3D6-4DA77EAC1906}.Debug|x64.ActiveCfg = Debug|Any CPU
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{0BF6958D-9EE3-4623-B3D6-4DA77EAC1906}.Debug|x64.Build.0 = Debug|Any CPU
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{0BF6958D-9EE3-4623-B3D6-4DA77EAC1906}.Debug|x86.ActiveCfg = Debug|Any CPU
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{0BF6958D-9EE3-4623-B3D6-4DA77EAC1906}.Debug|x86.Build.0 = Debug|Any CPU
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{0BF6958D-9EE3-4623-B3D6-4DA77EAC1906}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{0BF6958D-9EE3-4623-B3D6-4DA77EAC1906}.Release|Any CPU.Build.0 = Release|Any CPU
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{0BF6958D-9EE3-4623-B3D6-4DA77EAC1906}.Release|x64.ActiveCfg = Release|Any CPU
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{0BF6958D-9EE3-4623-B3D6-4DA77EAC1906}.Release|x64.Build.0 = Release|Any CPU
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{0BF6958D-9EE3-4623-B3D6-4DA77EAC1906}.Release|x86.ActiveCfg = Release|Any CPU
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{0BF6958D-9EE3-4623-B3D6-4DA77EAC1906}.Release|x86.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
@@ -240,6 +254,7 @@ Global
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{C39B0705-993E-43DB-B66A-A37A587F0BF7} = {E5B1EC71-0FC4-4FAA-9C65-32D5016FBC45}
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{644C4B4A-4A32-4307-9F71-C3BF901FFB66} = {E5B1EC71-0FC4-4FAA-9C65-32D5016FBC45}
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{39483140-BC26-4CAD-BBAE-3DC76C2F16CF} = {E5B1EC71-0FC4-4FAA-9C65-32D5016FBC45}
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{0BF6958D-9EE3-4623-B3D6-4DA77EAC1906} = {6749FB3E-39DE-4321-A39E-525278E9408D}
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {5C159F93-800B-49E7-9905-EE09F8B8434A}

‎samples/HostingPlayground/Greeter.cs

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namespace HostingPlayground
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{
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public class Greeter : IGreeter
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{
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}
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}

‎samples/HostingPlayground/GreeterOptions.cs

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namespace HostingPlayground
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{
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public class GreeterOptions
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{
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public string Name { get; }
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public GreeterOptions(string name)
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{
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Name = name;
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}
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}
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}

‎samples/HostingPlayground/HostingPlayground.csproj

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>netcoreapp3.1</TargetFramework>
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<GenerateDocumentationFile>true</GenerateDocumentationFile>
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<LangVersion>8</LangVersion>
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</PropertyGroup>
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<ItemGroup>
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<ProjectReference Include="..\..\src\System.CommandLine.Hosting\System.CommandLine.Hosting.csproj" />
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<ProjectReference Include="..\..\src\System.CommandLine\System.CommandLine.csproj" />
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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.1.4" />
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<PackageReference Include="microsoft.extensions.hosting" Version="3.1.4" />
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<PackageReference Include="Microsoft.Extensions.Logging" Version="3.1.4" />
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</ItemGroup>
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</Project>

‎samples/HostingPlayground/HostingPlaygroundLogEvents.cs

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namespace HostingPlayground
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{
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public class HostingPlaygroundLogEvents
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{
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public const int GreetEvent = 1000;
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}
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}

‎samples/HostingPlayground/IGreeter.cs

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using System;
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namespace HostingPlayground
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{
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interface IGreeter
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{
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void Greet(string name) => Console.WriteLine($"Hello, {name ?? "anonymous"}");
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}
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}

‎samples/HostingPlayground/Program.cs

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using System.CommandLine;
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using System.CommandLine.Builder;
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using System.CommandLine.Hosting;
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using System.CommandLine.Invocation;
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using Microsoft.Extensions.Hosting;
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using Microsoft.Extensions.Logging;
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using System.CommandLine.Parsing;
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using System.Threading.Tasks;
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using Microsoft.Extensions.DependencyInjection;
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using static HostingPlayground.HostingPlaygroundLogEvents;
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namespace HostingPlayground
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{
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class Program
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{
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static async Task Main(string[] args) => await BuildCommandLine()
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.UseHost(_ => Host.CreateDefaultBuilder(),
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host =>
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{
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host.ConfigureServices(services =>
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{
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services.AddSingleton<IGreeter, Greeter>();
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});
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})
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.UseDefaults()
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.Build()
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.InvokeAsync(args);
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private static CommandLineBuilder BuildCommandLine()
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{
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var root = new RootCommand(@"$ dotnet run --name 'Joe'"){
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new Option<string>("--name"){
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Required = true
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}
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};
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root.Handler = CommandHandler.Create<GreeterOptions, IHost>(Run);
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return new CommandLineBuilder(root);
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}
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private static void Run(GreeterOptions options, IHost host)
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{
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var serviceProvider = host.Services;
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var greeter = serviceProvider.GetRequiredService<IGreeter>();
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var loggerFactory = serviceProvider.GetRequiredService<ILoggerFactory>();
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var logger = loggerFactory.CreateLogger(typeof(Program));
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var name = options.Name;
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logger.LogInformation(GreetEvent, "Greeting was requested for: {name}", name);
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greeter.Greet(name);
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}
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}
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}

‎samples/HostingPlayground/appsettings.json

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{
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"Logging": {
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"LogLevel": {
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"Default": "Information",
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"Microsoft": "Warning"
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}
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}
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}

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