我想使用Swashbuckle.AspNetCore.Cli和SwaggerHostFactory来生成swagger.json。
对于path和compoments，生成的swagger.json总是空的，这很奇怪。

创建项目

dotnet new webapi -o DemoWebApi
cd DemoWebApi
dotnet restore

示例

• DemoWebApi.csrpoj

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
  </ItemGroup>

  <!-- create openapi cli -->
  <Target Name="OpenApiCliBuild" AfterTargets="PostBuildEvent" Condition="'$(Configuration)' == 'Debug'">
    <!-- create static file openapi doc -->
    <Exec Command="dotnet tool restore" />
    <Exec Command="dotnet new tool-manifest --force" />     
    <Exec Command="dotnet tool install --local Swashbuckle.AspNetCore.Cli --version 6.4.0" />
    <Exec Command="dotnet swagger tofile --output swagger.json $(OutputPath)\$(AssemblyName).dll v1" />     
  </Target>

</Project>

• C#程式码

// SwaggerHostFactory.cs
public class SwaggerHostFactory
{
    public static IHost CreateHost()
    {
        var builder = WebApplication.CreateBuilder();
        builder.Services.AddControllers();
        builder.Services.AddEndpointsApiExplorer();
        builder.Services.AddSwaggerGen();

        var app = builder.Build();
        if (app.Environment.IsDevelopment())
        {
            app.UseSwagger();
            app.UseSwaggerUI();
        }
        app.UseHttpsRedirection();
        app.UseAuthorization();
        app.MapControllers();
        return app;
    }
}

// Program.cs
var builder = WebApplication.CreateBuilder(args);
// ignore... same as SwaggerHostFactory
app.MapControllers();
app.Run();

运行项目

dotnet watch run

预期输出

• 如果未使用SwaggerHostFactory

{
  "openapi": "3.0.1",
  "info": {
    "title": "DemoWebApi, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null",
    "version": "1.0"
  },
  "paths": {
    "/WeatherForecast": {
      "get": {
        "tags": [
          "WeatherForecast"
        ],
        // ...ignore         
        }
      }
    }
  ,
  "components": {
    "schemas": {
      "WeatherForecast": {
        "type": "object",
        // ...ignore         
      }
    }
  }
}

实际输出

• 使用SwaggerHostFactory

{
  "openapi": "3.0.1",
  "info": {
    "title": "dotnet-swagger",
    "version": "1.0"
  },
  "paths": { },
  "components": { }
}

Swashbuckle.AspNetCore.Cli是否支持使用SwaggerHostFactory int .NET 6？我该怎么做？