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drewburlingamedrewburlingame
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stub hosting extensions
stub a UseHost extension method to configure app with an IHost and IHostBuilder Inject CommandContext as a service
1 parent 87fbb45 commit 632ff60

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‎CommandDotNet.Hosting/CommandDotNet.Hosting.csproj

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<AssemblyTitle>CommandDotNet.Hosting</AssemblyTitle>
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<Description>Integrates Microsoft.Extensions.Hosting with CommandDotNet</Description>
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</PropertyGroup>
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<ItemGroup>
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<Compile Remove="output\**" />
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</ItemGroup>
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<ItemGroup>
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<EmbeddedResource Remove="output\**" />
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</ItemGroup>
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<ItemGroup>
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<None Remove="output\**" />
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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.Extensions.Hosting" Version="3.1.4" />
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<PackageReference Include="Nullable" Version="1.2.1">
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<PrivateAssets>all</PrivateAssets>
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<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
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</PackageReference>
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\CommandDotNet\CommandDotNet.csproj" />
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</ItemGroup>
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</Project>

‎CommandDotNet.Hosting/HostingExtensions.cs

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using System;
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using System.IO;
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using System.Threading.Tasks;
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using CommandDotNet.Execution;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Hosting;
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namespace CommandDotNet.Hosting
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{
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public static class HostingExtensions
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{
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public static AppRunner UseHost(this AppRunner runner,
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string[]? args = null,
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Action<IHostBuilder>? configureHost = null,
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Func<IHostBuilder> hostBuilderFactory = null,
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bool supportReplSessions = false)
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{
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var hostBuilder = hostBuilderFactory?.Invoke() ?? Host.CreateDefaultBuilder(args);
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hostBuilder.ConfigureHostConfiguration(hostConfig =>
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{
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hostConfig.SetBasePath(Directory.GetCurrentDirectory());
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});
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configureHost?.Invoke(hostBuilder);
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return runner.UseHost(hostBuilder, supportReplSessions);
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}
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public static AppRunner UseHost(this AppRunner runner, IHostBuilder hostBuilder, bool supportReplSessions = false)
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{
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if (hostBuilder == null)
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{
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throw new ArgumentNullException(nameof(hostBuilder));
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}
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return runner.Configure(cfg =>
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{
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hostBuilder.ConfigureServices(services =>
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{
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if (supportReplSessions)
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{
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services.AddScoped<ScopedServices>();
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services.AddScoped(p => p.GetRequiredService<ScopedServices>().CommandContext!);
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services.AddScoped(p => p.GetRequiredService<ScopedServices>().CommandContext!.Console);
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}
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else
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{
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services.AddSingleton<ScopedServices>();
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services.AddSingleton(p => p.GetRequiredService<ScopedServices>().CommandContext!);
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services.AddSingleton(p => p.GetRequiredService<ScopedServices>().CommandContext!.Console);
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}
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});
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var host = hostBuilder.Build();
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cfg.UseMiddleware(RunHost, MiddlewareSteps.CancellationHandler + 1000);
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cfg.UseMiddleware(InjectCommandContextForDI, MiddlewareSteps.CancellationHandler + 1001);
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cfg.Services.Add(new Config(host, supportReplSessions));
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});
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}
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private static async Task<int> RunHost(CommandContext context, ExecutionDelegate next)
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{
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var config = context.AppConfig.Services.GetOrThrow<Config>();
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if (config.IsStarted)
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{
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// this call is within a REPL session.
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// do not recreate the host
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return await next(context);
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}
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config.IsStarted = true;
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await config.Host.StartAsync();
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var result = await next(context);
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await config.Host.StopAsync();
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return result;
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}
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private class Config
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{
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public bool IsStarted;
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public IHost Host { get; }
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public bool SupportReplSessions { get; }
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public Config(IHost host, bool supportReplSessions)
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{
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Host = host ?? throw new ArgumentNullException(nameof(host));
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SupportReplSessions = supportReplSessions;
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}
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}
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private class ScopedServices
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{
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public CommandContext? CommandContext;
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}
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private static Task<int> InjectCommandContextForDI(CommandContext context, ExecutionDelegate next)
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{
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var config = context.AppConfig.Services.GetOrThrow<Config>();
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var serviceProvider = config.Host.Services;
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if (config.SupportReplSessions)
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{
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using var scope = serviceProvider.CreateScope();
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scope.ServiceProvider.GetRequiredService<ScopedServices>().CommandContext = context;
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return next(context);
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}
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serviceProvider.GetRequiredService<ScopedServices>().CommandContext = context;
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return next(context);
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}
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}
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}

‎CommandDotNet.sln

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@@ -40,6 +40,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "CommandDotNet.Example.Tests
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CommandDotNet.DataAnnotations", "CommandDotNet.DataAnnotations\CommandDotNet.DataAnnotations.csproj", "{558AA426-06D4-4FC9-B2E5-B6742F0A5D77}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CommandDotNet.Hosting", "CommandDotNet.Hosting\CommandDotNet.Hosting.csproj", "{969B52A2-8790-47C6-A624-AB7FA1383AE7}"
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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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{558AA426-06D4-4FC9-B2E5-B6742F0A5D77}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{558AA426-06D4-4FC9-B2E5-B6742F0A5D77}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{558AA426-06D4-4FC9-B2E5-B6742F0A5D77}.Release|Any CPU.Build.0 = Release|Any CPU
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{969B52A2-8790-47C6-A624-AB7FA1383AE7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{969B52A2-8790-47C6-A624-AB7FA1383AE7}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{969B52A2-8790-47C6-A624-AB7FA1383AE7}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{969B52A2-8790-47C6-A624-AB7FA1383AE7}.Release|Any CPU.Build.0 = Release|Any CPU
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{1149E03F-FF07-448A-BB42-82876459B138}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{1149E03F-FF07-448A-BB42-82876459B138}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{1149E03F-FF07-448A-BB42-82876459B138}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{1149E03F-FF07-448A-BB42-82876459B138}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE

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