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[英]How do I avoid CS0103 errors in Visual Studio when using Source Generators?
[英]Source Generators dependencies not loaded in Visual Studio
我正在研究源代碼生成器,但我遇到了依賴問題:
It will not contribute to the output and compilation errors may occur as a result. Exception was of type 'FileNotFoundException' with message 'Could not load file or assembly 'Flurl.Http, Version=3.0.1.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.'
有很多關於如何將依賴項打包到 nuget 的信息,但我直接引用分析器項目是這樣的:
<ProjectReference Include="SG.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
在分析器項目中,我添加了<CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
並且所有依賴項都在 output 目錄中可用,但是 VS 沒有使用該目錄 - 它使用AppData\Local\Temp\VBCSCompiler\AnalyzerAssemblyLoader\[...]
那里只復制一個 DLL。
可以做些什么來完成這項工作?
這應該工作的方式在source-generators cook-book中進行了概述,他們的例子是:
<Project>
<PropertyGroup>
<GeneratePackageOnBuild>true</GeneratePackageOnBuild> <!-- Generates a package at build -->
<IncludeBuildOutput>false</IncludeBuildOutput> <!-- Do not include the generator as a lib dependency -->
</PropertyGroup>
<ItemGroup>
<!-- Take a private dependency on Newtonsoft.Json (PrivateAssets=all) Consumers of this generator will not reference it.
Set GeneratePathProperty=true so we can reference the binaries via the PKGNewtonsoft_Json property -->
<PackageReference Include="Newtonsoft.Json" Version="12.0.1" PrivateAssets="all" GeneratePathProperty="true" />
<!-- Package the generator in the analyzer directory of the nuget package -->
<None Include="$(OutputPath)\$(AssemblyName).dll" Pack="true" PackagePath="analyzers/dotnet/cs" Visible="false" />
<!-- Package the Newtonsoft.Json dependency alongside the generator assembly -->
<None Include="$(PkgNewtonsoft_Json)\lib\netstandard2.0\*.dll" Pack="true" PackagePath="analyzers/dotnet/cs" Visible="false" />
</ItemGroup>
</Project>
但是,根據我的經驗,這仍然不可靠或不可靠; 這是公認的,我的印象是改善這種體驗是未來計划的一部分,但是:老實說,現在最好不要使用核心框架和已經加載的 Roslyn 庫之外的依賴項。 如果您的依賴項與分析器/生成器位於同一存儲庫中,您可能可以在構建期間簡單地吸收代碼, 例如從這里:
<ItemGroup>
<!-- compile what we need from protobuf-net directly; package refs cause pure pain in anaylizers-->
<Compile Include="../protobuf-net.Core/**/*.cs" Link="protobuf-net.Core"/>
<Compile Remove="../protobuf-net.Core/obj/**/*.cs" />
<Compile Include="../protobuf-net.Reflection/**/*.cs" Link="protobuf-net.Reflection"/>
<Compile Remove="../protobuf-net.Reflection/obj/**/*.cs" />
</ItemGroup>
我找到了通過一些技巧使其或多或少可靠地工作的方法。
在此之前我也嘗試過 ILMerge,但它不起作用(缺少方法異常)。
首先,我將依賴項嵌入到源生成器程序集中,如下所示:
<ItemGroup>
<PackageReference Include="Newtonsoft.Json" Version="13.0.1" GeneratePathProperty="true" PrivateAssets="all" />
</ItemGroup>
<ItemGroup>
<EmbeddedResource Include="$(PKGNewtonsoft_Json)\lib\netstandard2.0\Newtonsoft.Json.dll" Visible="false" />
</ItemGroup>
然后我為AppDomain
(生成器類中的靜態構造函數)創建了AssemblyResolve
處理程序,如下所示:
AppDomain.CurrentDomain.AssemblyResolve += (_, args) =>
{
AssemblyName name = new(args.Name);
Assembly loadedAssembly = AppDomain.CurrentDomain.GetAssemblies().FirstOrDefault(a => a.GetName().FullName == name.FullName);
if (loadedAssembly != null)
{
return loadedAssembly;
}
string resourceName = $"Namespace.{name.Name}.dll";
using Stream resourceStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceName);
if (resourceStream == null)
{
return null;
}
using MemoryStream memoryStream = new MemoryStream();
resourceStream.CopyTo(memoryStream);
return Assembly.Load(memoryStream.ToArray());
};
現在有一個明確的答案。 Source Generator Samples包含一個示例.csproj
,它具有所需的設置。
我用它用Sprache制作了一個源代碼生成器,效果很好。
在此處粘貼示例.csproj
以供參考:
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netstandard2.0</TargetFramework>
<LangVersion>8.0</LangVersion>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="$(MicrosoftNetCompilersToolsetVersion)" PrivateAssets="all" />
<PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.0.0" PrivateAssets="all" />
</ItemGroup>
<ItemGroup>
<!-- Generator dependencies -->
<PackageReference Include="CsvTextFieldParser" Version="1.2.2-preview" GeneratePathProperty="true" PrivateAssets="all" />
<PackageReference Include="Handlebars.Net" Version="1.10.1" GeneratePathProperty="true" PrivateAssets="all" />
<PackageReference Include="Newtonsoft.Json" Version="12.0.1" GeneratePathProperty="true" PrivateAssets="all" />
</ItemGroup>
<PropertyGroup>
<GetTargetPathDependsOn>$(GetTargetPathDependsOn)</GetTargetPathDependsOn>;GetDependencyTargetPaths
</PropertyGroup>
<Target Name="GetDependencyTargetPaths">
<ItemGroup>
<TargetPathWithTargetPlatformMoniker Include="$(PKGCsvTextFieldParser)\lib\netstandard2.0\CsvTextFieldParser.dll" IncludeRuntimeDependency="false" />
<TargetPathWithTargetPlatformMoniker Include="$(PKGHandlebars_Net)\lib\netstandard2.0\Handlebars.dll" IncludeRuntimeDependency="false" />
<TargetPathWithTargetPlatformMoniker Include="$(PKGNewtonsoft_Json)\lib\netstandard2.0\Newtonsoft.Json.dll" IncludeRuntimeDependency="false" />
</ItemGroup>
</Target>
</Project>
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