Configuration binder source generator producing invalid code #92021
Comments
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Tagging subscribers to this area: @dotnet/area-extensions-configuration Issue DetailsDescriptionIn the new NET 8 RC1, even the most basic configuration binder source generator scenarios seem to produce invalid code. Reproduction Stepsusing Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
var configuration = new ConfigurationBuilder()
.AddJsonFile("appsettings.json")
.Build();
var services = new ServiceCollection();
services.Configure<A>(configuration.GetSection("MyOptions"));
Console.WriteLine("Hello, World!");
public class MyOptions
{
public string Text { get; set; } = string.Empty;
}With the following csproj: <Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net8.0</TargetFramework>
<LangVersion>preview</LangVersion>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<PublishAot>true</PublishAot>
<InvariantGlobalization>true</InvariantGlobalization>
<EnableConfigurationBindingGenerator>true</EnableConfigurationBindingGenerator>
<Features>InterceptorsPreview</Features>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.Extensions.Configuration" Version="8.0.0-rc.1.23419.4" />
<PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="8.0.0-rc.1.23419.4" />
<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0-rc.1.23419.4" />
<PackageReference Include="Microsoft.Extensions.Options" Version="8.0.0-rc.1.23419.4" />
<PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="8.0.0-rc.1.23419.4" />
</ItemGroup>
</Project>Expected behaviorShould build. Actual behaviorThe source generator seems to generate invalid code, which produce the following errors:
Regression?Worked in .NET 8 Preview 7 Known WorkaroundsNo response Configuration.NET 8.0.100-rc.1.23455.8 Other informationNo response
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FYI, this is the source generated file: // <auto-generated/>
#nullable enable
#pragma warning disable CS0612, CS0618 // Suppress warnings about [Obsolete] member usage in generated code.
namespace System.Runtime.CompilerServices
{
using System;
using System.CodeDom.Compiler;
[GeneratedCode("Microsoft.Extensions.Configuration.Binder.SourceGeneration", "8.0.8.41904")]
[AttributeUsage(AttributeTargets.Method, AllowMultiple = true)]
file sealed class InterceptsLocationAttribute : Attribute
{
public InterceptsLocationAttribute(string filePath, int line, int column)
{
}
}
}
namespace Microsoft.Extensions.Configuration.Binder.SourceGeneration
{
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Globalization;
using System.Runtime.CompilerServices;
[GeneratedCode("Microsoft.Extensions.Configuration.Binder.SourceGeneration", "8.0.8.41904")]
file static class BindingExtensions
{
#region IServiceCollection extensions.
/// <summary>Registers a configuration instance which TOptions will bind against.</summary>
[InterceptsLocationAttribute(@"C:\Projects\platform\misc\DdbTest\ConsoleApp1\Program.cs", 10, 10)]
public static IServiceCollection Configure<TOptions>(this IServiceCollection services, IConfiguration configuration) where TOptions : class
{
return Configure<TOptions>(services, string.Empty, configuration, configureOptions: null);
}
/// <summary>Registers a configuration instance which TOptions will bind against.</summary>
public static IServiceCollection Configure<TOptions>(this IServiceCollection services, string? name, IConfiguration configuration, Action<BinderOptions>? configureOptions) where TOptions : class
{
if (services is null)
{
throw new ArgumentNullException(nameof(services));
}
if (configuration is null)
{
throw new ArgumentNullException(nameof(configuration));
}
OptionsServiceCollectionExtensions.AddOptions(services);
services.AddSingleton<IOptionsChangeTokenSource<TOptions>>(new ConfigurationChangeTokenSource<TOptions>(name, configuration));
return services.AddSingleton<Microsoft.Extensions.Options.IConfigureOptions<TOptions>>(new Microsoft.Extensions.Options.ConfigureNamedOptions<TOptions>(name, obj => BindCoreMain(configuration, obj, typeof(TOptions)configureOptions)));
}
#endregion IServiceCollection extensions.
#region Core binding extensions.
private readonly static Lazy<HashSet<string>> s_configKeys_MyOptions = new(() => new HashSet<string>(StringComparer.OrdinalIgnoreCase) { "Text" });
public static void BindCoreMain(IConfiguration configuration, object obj, Type type, Action<BinderOptions>? configureOptions)
{
if (configuration is null)
{
throw new ArgumentNullException(nameof(configuration));
}
if (obj is null)
{
throw new ArgumentNullException(nameof(obj));
}
if (!HasValueOrChildren(configuration))
{
return;
}
BinderOptions? binderOptions = GetBinderOptions(configureOptions);
if (type == typeof(MyOptions))
{
var temp = (MyOptions)obj;
BindCore(configuration, ref temp, binderOptions);
return;
}
throw new NotSupportedException($"Unable to bind to type '{type}': generator did not detect the type as input.");
}
public static void BindCore(IConfiguration configuration, ref MyOptions obj, BinderOptions? binderOptions)
{
ValidateConfigurationKeys(typeof(MyOptions), s_configKeys_MyOptions, configuration, binderOptions);
obj.Text = configuration["Text"]!;
}
/// <summary>If required by the binder options, validates that there are no unknown keys in the input configuration object.</summary>
public static void ValidateConfigurationKeys(Type type, Lazy<HashSet<string>> keys, IConfiguration configuration, BinderOptions? binderOptions)
{
if (binderOptions?.ErrorOnUnknownConfiguration is true)
{
List<string>? temp = null;
foreach (IConfigurationSection section in configuration.GetChildren())
{
if (!keys.Value.Contains(section.Key))
{
(temp ??= new List<string>()).Add($"'{section.Key}'");
}
}
if (temp is not null)
{
throw new InvalidOperationException($"'ErrorOnUnknownConfiguration' was set on the provided BinderOptions, but the following properties were not found on the instance of {type}: {string.Join(", ", temp)}");
}
}
}
public static bool HasValueOrChildren(IConfiguration configuration)
{
if ((configuration as IConfigurationSection)?.Value is not null)
{
return true;
}
return AsConfigWithChildren(configuration) is not null;
}
public static IConfiguration? AsConfigWithChildren(IConfiguration configuration)
{
foreach (IConfigurationSection _ in configuration.GetChildren())
{
return configuration;
}
return null;
}
public static BinderOptions? GetBinderOptions(Action<BinderOptions>? configureOptions)
{
if (configureOptions is null)
{
return null;
}
BinderOptions binderOptions = new();
configureOptions(binderOptions);
if (binderOptions.BindNonPublicProperties)
{
throw new NotSupportedException($"The configuration binding source generator does not support 'BinderOptions.BindNonPublicProperties'.");
}
return binderOptions;
}
#endregion Core binding extensions.
}
}If I add this manually, I don't have the first two errors, just the missing comma error. This modification fixes it: - return services.AddSingleton<Microsoft.Extensions.Options.IConfigureOptions<TOptions>>(new Microsoft.Extensions.Options.ConfigureNamedOptions<TOptions>(name, obj => BindCoreMain(configuration, obj, typeof(TOptions)configureOptions)));
+ return services.AddSingleton<Microsoft.Extensions.Options.IConfigureOptions<TOptions>>(new Microsoft.Extensions.Options.ConfigureNamedOptions<TOptions>(name, obj => BindCoreMain(configuration, obj, typeof(TOptions), configureOptions))); |
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This was a regression added in RC-2. Fixed for RC-2 in #91602. Please check if the latest RC-2 bits work for you - https://github.com/dotnet/installer#table. |
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@layomia I've tried in RC2 and the comma issue is sorted, but the other two errors remain. The problem seems to be that services.AddSingleton<IOptionsChangeTokenSource<TOptions>>(new ConfigurationChangeTokenSource<TOptions>(name, configuration));
return services.AddSingleton<Microsoft.Extensions.Options.IConfigureOptions<TOptions>>(new Microsoft.Extensions.Options.ConfigureNamedOptions<TOptions>(name, obj => BindCoreMain(configuration, obj, typeof(TOptions), configureOptions))); |
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Which |
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@layomia This was 8.0.100-rc.2.23463.8. I'll try the new latest. |
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Seeing the same in 8.0.100-rc.2.23464.22, plus the comma issue seems to have re-materialised? (same example as above) EDIT: Now resolved, though I had to add explicit references to the latest Microsoft.Extensions.Configuration.Json and Microsoft.Extensions.Options.ConfigurationExtensions? |
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Description
In the new NET 8 RC1, even the most basic configuration binder source generator scenarios seem to produce invalid code.
Reproduction Steps
With the following csproj:
Expected behavior
Should build.
Actual behavior
The source generator seems to generate invalid code, which produce the following errors:
The type or namespace name 'IOptionsChangeTokenSource<>' could not be found (are you missing a using directive or an assembly reference?) (line 55)The type or namespace name 'ConfigurationChangeTokenSource<>' could not be found (are you missing a using directive or an assembly reference?) (line 55)Syntax error, ',' expected(line 56)Regression?
Worked in .NET 8 Preview 7
Known Workarounds
No response
Configuration
.NET 8.0.100-rc.1.23455.8
Other information
No response
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