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Set CSharpLangVersion during runtime compilation (#9135) 

* Set CSharpLangVersion during runtime compilation

* Pass CSharpLangVersion inferred by the CSharpCompiler to RazorEngine
* Set GenerateRazorHostingAssemblyInfo in Razor.RuntimeCompilation
targets
* Unskip failing test

Fixes https://github.com/aspnet/AspNetCore/issues/8996
This commit is contained in:
Pranav K 2019-04-05 21:24:50 -07:00 committed by GitHub
parent 04f1f1f389
commit fb037bda01
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 21 additions and 12 deletions
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24
src/Mvc/Mvc.Razor.RuntimeCompilation/src/CSharpCompiler.cs
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@ -209,19 +209,23 @@ namespace Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation
var parseOptions = new CSharpParseOptions(preprocessorSymbols: defines);
if (!string.IsNullOrEmpty(dependencyContextOptions.LanguageVersion))
if (string.IsNullOrEmpty(dependencyContextOptions.LanguageVersion))
{
if (LanguageVersionFacts.TryParse(dependencyContextOptions.LanguageVersion, out var languageVersion))
{
parseOptions = parseOptions.WithLanguageVersion(languageVersion);
}
else
{
Debug.Fail($"LanguageVersion {languageVersion} specified in the deps file could not be parsed.");
}
// During preview releases, Roslyn assumes Preview language version for netcoreapp3.0 targeting projects.
// We will match the behavior if the project does not specify a value for C# language (e.g. if you're using Razor compilation in a F# project).
// Prior to 3.0 RTM, this value needs to be changed to "Latest". This is tracked via https://github.com/aspnet/AspNetCore/issues/9129
parseOptions = parseOptions.WithLanguageVersion(LanguageVersion.Preview);
}
else if (LanguageVersionFacts.TryParse(dependencyContextOptions.LanguageVersion, out var languageVersion))
{
parseOptions = parseOptions.WithLanguageVersion(languageVersion);
}
else
{
Debug.Fail($"LanguageVersion {languageVersion} specified in the deps file could not be parsed.");
}
return parseOptions;
}
}
}
}

2
src/Mvc/Mvc.Razor.RuntimeCompilation/src/DependencyInjection/RazorRuntimeCompilationMvcCoreBuilderExtensions.cs
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@ -83,6 +83,7 @@ namespace Microsoft.Extensions.DependencyInjection
services.TryAddSingleton(s =>
{
var fileSystem = s.GetRequiredService<RazorProjectFileSystem>();
var csharpCompiler = s.GetRequiredService<CSharpCompiler>();
var projectEngine = RazorProjectEngine.Create(RazorConfiguration.Default, fileSystem, builder =>
{
RazorExtensions.Register(builder);
@ -95,6 +96,7 @@ namespace Microsoft.Extensions.DependencyInjection
// TagHelperDescriptorProviders (actually do tag helper discovery)
builder.Features.Add(new DefaultTagHelperDescriptorProvider());
builder.Features.Add(new ViewComponentTagHelperDescriptorProvider());
builder.SetCSharpLanguageVersion(csharpCompiler.ParseOptions.LanguageVersion);
});
return projectEngine;

3
src/Mvc/Mvc.Razor.RuntimeCompilation/src/build/netcoreapp3.0/Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.targets
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@ -2,5 +2,8 @@
<PropertyGroup>
<PreserveCompilationContext>true</PreserveCompilationContext>
<PreserveCompilationReferences>true</PreserveCompilationReferences>
<!-- Generate hosting attributes during build time compilation to support runtime compilation -->
<GenerateRazorHostingAssemblyInfo Condition="'$(GenerateRazorHostingAssemblyInfo)'==''">true</GenerateRazorHostingAssemblyInfo>
</PropertyGroup>
</Project>

2
src/Mvc/Mvc.Razor.RuntimeCompilation/test/CSharpCompilerTest.cs
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@ -124,7 +124,7 @@ namespace Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation
// Act & Assert
var parseOptions = compiler.ParseOptions;
Assert.Equal(LanguageVersion.CSharp7_3, parseOptions.LanguageVersion);
Assert.Equal(LanguageVersion.CSharp8, parseOptions.LanguageVersion);
Assert.Equal(new[] { "DEBUG" }, parseOptions.PreprocessorSymbolNames);
}

2
src/ProjectTemplates/test/MvcTemplateTest.cs
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@ -26,7 +26,7 @@ namespace Templates.Test
[Theory]
[InlineData(null)]
[InlineData("F#", Skip = "https://github.com/aspnet/AspNetCore/issues/8996")]
[InlineData("F#")]
public async Task MvcTemplate_NoAuthImplAsync(string languageOverride)
{
Project = await ProjectFactory.GetOrCreateProject("mvcnoauth" + (languageOverride == "F#" ? "fsharp" : "csharp"), Output);