public PreprocessResult PreprocessRazorTemplate(string content, string className, string classNamespace)
{
var language = new CSharpRazorCodeLanguage();
var razorHost = new RazorEngineHost(language)
{
DefaultBaseClass = typeof(TemplateBase).FullName,
DefaultNamespace = classNamespace,
DefaultClassName = className,
GeneratedClassContext = new GeneratedClassContext(
nameof(TemplateBase.ExecuteAsync),
nameof(TemplateBase.Write),
nameof(TemplateBase.WriteLiteral),
new GeneratedTagHelperContext())
};
razorHost.NamespaceImports.Add(classNamespace);
var razorEngine = new RazorTemplateEngine(razorHost);
var generatorResults = razorEngine.GenerateCode(new StringReader(content));
if (!generatorResults.Success)
{
throw new Exception(string.Join(Environment.NewLine, generatorResults.ParserErrors.Select(x => x.Message)));
}
var preprocessResult = new PreprocessResult()
{
PreprocessedContent = generatorResults.GeneratedCode,
References = _host.StandardImports.ToList(),
};
return(preprocessResult);
}
public Assembly Compile(string assemblyName, PreprocessResult preprocessResult)
{
var references = new List <MetadataReference>();
// project references
references.AddRange(_resolver.ResolveMetadataReference());
// assembly instruction
references.AddRange(preprocessResult.References.Select(ResolveAssemblyReference)
.Where(metadata => metadata != null));
var compilation = CSharpCompilation.Create(
assemblyName,
new[] { SyntaxFactory.ParseSyntaxTree(preprocessResult.PreprocessedContent) },
references,
new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary));
using (var stream = new MemoryStream())
{
var result = compilation.Emit(stream);
_host.LogErrors(result);
var transformationAssembly = Assembly.Load(stream.ToArray());
//var transformationAssembly = (Assembly)typeof(Assembly).GetTypeInfo().GetDeclaredMethods("Load").First(m =>
//{
// var parameters = m.GetParameters();
// return parameters.Length == 1 && parameters[0].ParameterType == typeof(byte[]);
//}).Invoke(null, new[] { stream.ToArray() });
return(transformationAssembly);
}
}
// todo add to cli tool
/// <summary>
/// 将 T4 模板转换成 cs 代码
/// </summary>
/// <param name="content">模板内容</param>
/// <param name="className">生成的 cs 代码类名</param>
/// <param name="classNamespace">生成的 cs 代码名称空间名</param>
/// <returns>cs 代码内容及其引用的 Reference</returns>
public PreprocessResult PreprocessT4Template(string content, string className, string classNamespace)
{
var result = new Parser(_host).Parse(content);
var transformation = new PreprocessTextTransformation(className, classNamespace, result, _host);
var preprocessedContent = transformation.TransformText();
var preprocessed = new PreprocessResult
{
References = result.References.Distinct().ToArray(),
PreprocessedContent = preprocessedContent
};
return(preprocessed);
}
public Assembly Compile(string assemblyName, PreprocessResult preprocessResult)
{
var compilation = CSharpCompilation.Create(
assemblyName,
new[] { SyntaxFactory.ParseSyntaxTree(preprocessResult.PreprocessedContent) },
preprocessResult.References.SelectMany(ResolveAssemblyReference),
new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary));
using (var stream = new MemoryStream())
{
var result = compilation.Emit(stream);
_host.LogErrors(result);
var transformationAssembly = (Assembly)typeof(Assembly).GetTypeInfo().GetDeclaredMethods("Load").First(m =>
{
var parameters = m.GetParameters();
return(parameters.Length == 1 && parameters[0].ParameterType == typeof(byte[]));
}).Invoke(null, new[] { stream.ToArray() });
return(transformationAssembly);
}
}
