/// <summary>
/// Generates source code for the provided assembly.
/// </summary>
/// <param name="input">
/// The assembly to generate source for.
/// </param>
/// <returns>
/// The generated source.
/// </returns>
public string GenerateSourceForAssembly(Assembly input)
{
if (input.GetCustomAttribute <GeneratedCodeAttribute>() != null ||
input.GetCustomAttribute <SkipCodeGenerationAttribute>() != null)
{
return(string.Empty);
}
var generated = this.GenerateCode(input, new[] { input }.ToList());
if (generated.Syntax == null)
{
return(string.Empty);
}
return(CodeGeneratorCommon.GenerateSourceCode(CodeGeneratorCommon.AddGeneratedCodeAttribute(generated)));
}
/// <summary>
/// Generates source code for the provided assembly.
/// </summary>
/// <param name="input">
/// The assembly to generate source for.
/// </param>
/// <returns>
/// The generated source.
/// </returns>
public string GenerateSourceForAssembly(Assembly input)
{
if (!ShouldGenerateCodeForAssembly(input))
{
return(string.Empty);
}
var generated = GenerateForAssemblies(new List <Assembly> {
input
}, false);
if (generated.Syntax == null)
{
return(string.Empty);
}
return(CodeGeneratorCommon.GenerateSourceCode(CodeGeneratorCommon.AddGeneratedCodeAttribute(generated)));
}
/// <summary>
/// Generates source code for the provided assembly.
/// </summary>
/// <param name="input">
/// The assembly to generate source for.
/// </param>
/// <returns>
/// The generated source.
/// </returns>
public string GenerateSourceForAssembly(Assembly input)
{
RegisterGeneratedCodeTargets(input);
if (input.GetCustomAttribute <GeneratedCodeAttribute>() != null ||
input.GetCustomAttribute <SkipCodeGenerationAttribute>() != null)
{
return(string.Empty);
}
var generated = GenerateForAssemblies(new List <Assembly> {
input
}, false);
if (generated.Syntax == null)
{
return(string.Empty);
}
return(CodeGeneratorCommon.GenerateSourceCode(CodeGeneratorCommon.AddGeneratedCodeAttribute(generated)));
}
/// <summary>
/// Generates and compiles an assembly for the provided syntax.
/// </summary>
/// <param name="generatedSyntax">
/// The generated code.
/// </param>
/// <param name="assemblyName">
/// The name for the generated assembly.
/// </param>
/// <param name="emitDebugSymbols">
/// Whether or not to emit debug symbols for the generated assembly.
/// </param>
/// <returns>
/// The raw assembly.
/// </returns>
/// <exception cref="CodeGenerationException">
/// An error occurred generating code.
/// </exception>
private Assembly CompileAssembly(GeneratedSyntax generatedSyntax, string assemblyName, bool emitDebugSymbols)
{
// Add the generated code attribute.
var code = CodeGeneratorCommon.AddGeneratedCodeAttribute(generatedSyntax);
// Reference everything which can be referenced.
var assemblies =
AppDomain.CurrentDomain.GetAssemblies()
.Where(asm => !asm.IsDynamic && !string.IsNullOrWhiteSpace(asm.Location))
.Select(asm => MetadataReference.CreateFromFile(asm.Location))
.Cast <MetadataReference>()
.ToArray();
// Generate the code.
var options = new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary);
#if NETSTANDARD2_0
// CoreFX bug https://github.com/dotnet/corefx/issues/5540
// to workaround it, we are calling internal WithTopLevelBinderFlags(BinderFlags.IgnoreCorLibraryDuplicatedTypes)
// TODO: this API will be public in the future releases of Roslyn.
// This work is tracked in https://github.com/dotnet/roslyn/issues/5855
// Once it's public, we should replace the internal reflection API call by the public one.
var method = typeof(CSharpCompilationOptions).GetMethod("WithTopLevelBinderFlags", BindingFlags.NonPublic | BindingFlags.Instance);
// we need to pass BinderFlags.IgnoreCorLibraryDuplicatedTypes, but it's an internal class
// http://source.roslyn.io/#Microsoft.CodeAnalysis.CSharp/Binder/BinderFlags.cs,00f268571bb66b73
options = (CSharpCompilationOptions)method.Invoke(options, new object[] { 1u << 26 });
#endif
string source = null;
if (this.logger.IsEnabled(LogLevel.Debug))
{
source = CodeGeneratorCommon.GenerateSourceCode(code);
// Compile the code and load the generated assembly.
this.logger.Debug(
ErrorCode.CodeGenSourceGenerated,
"Generating assembly {0} with source:\n{1}",
assemblyName,
source);
}
var compilation =
CSharpCompilation.Create(assemblyName)
.AddSyntaxTrees(code.SyntaxTree)
.AddReferences(assemblies)
.WithOptions(options);
using (var outputStream = new MemoryStream())
{
var emitOptions = new EmitOptions()
.WithEmitMetadataOnly(false)
.WithIncludePrivateMembers(true);
if (emitDebugSymbols)
{
emitOptions = emitOptions.WithDebugInformationFormat(DebugInformationFormat.Embedded);
}
var compilationResult = compilation.Emit(outputStream, options: emitOptions);
if (!compilationResult.Success)
{
source = source ?? CodeGeneratorCommon.GenerateSourceCode(code);
var errors = string.Join("\n", compilationResult.Diagnostics.Select(_ => _.ToString()));
this.logger.Warn(
ErrorCode.CodeGenCompilationFailed,
"Compilation of assembly {0} failed with errors:\n{1}\nGenerated Source Code:\n{2}",
assemblyName,
errors,
source);
throw new CodeGenerationException(errors);
}
this.logger.Debug(
ErrorCode.CodeGenCompilationSucceeded,
"Compilation of assembly {0} succeeded.",
assemblyName);
return(Assembly.Load(outputStream.ToArray()));
}
}