/// <inheritdoc />
protected override void Initialize(CSharpCompilation oldCompilation, CancellationToken _)
{
OptimizationLevel compilationConfiguration = oldCompilation.Options.OptimizationLevel;
DebugCometaryAttribute attribute = Attribute;
if (compilationConfiguration == OptimizationLevel.Debug && !attribute.RunInDebug)
{
return;
}
if (compilationConfiguration == OptimizationLevel.Release && !attribute.RunInRelease)
{
return;
}
string typeName = attribute.MainClassName ?? DebugCometaryAttribute.DefaultMainClassName;
if (Assembly.GetEntryAssembly().GetType(typeName) != null)
{
return;
}
CSharpCompilation EditCompilation(CSharpCompilation compilation, CancellationToken cancellationToken)
{
CSharpCompilationOptions options = compilation.Options;
CSharpCompilationOptions newOptions = options
.WithOutputKind(OutputKind.ConsoleApplication)
.WithMainTypeName(typeName);
// - Make the compilation an application, allowing its execution.
// - Redirect the entry point to the automatically generated class.
compilation = compilation.WithOptions(newOptions);
// Create the entry point:
string errorFile = Path.GetTempFileName();
CSharpSyntaxTree generatedSyntaxTree = (CSharpSyntaxTree)CSharpSyntaxTree.ParseText(GetSourceText(attribute.DisplayEndOfCompilationMessage, errorFile), cancellationToken: cancellationToken);
CompilationUnitSyntax generatedRoot = generatedSyntaxTree.GetCompilationUnitRoot(cancellationToken);
ClassDeclarationSyntax classSyntax = (ClassDeclarationSyntax)generatedRoot.Members.Last();
ClassDeclarationSyntax originalClassSyntax = classSyntax;
// Edit the generated syntax's name, if needed.
if (typeName != DebugCometaryAttribute.DefaultMainClassName)
{
classSyntax = classSyntax.WithIdentifier(F.Identifier(typeName));
}
// Change the filename and arguments.
SyntaxList <MemberDeclarationSyntax> members = classSyntax.Members;
FieldDeclarationSyntax WithValue(FieldDeclarationSyntax node, string value)
{
VariableDeclaratorSyntax variableSyntax = node.Declaration.Variables[0];
LiteralExpressionSyntax valueSyntax = F.LiteralExpression(
SyntaxKind.StringLiteralExpression,
F.Literal(value)
);
return(node.WithDeclaration(
node.Declaration.WithVariables(node.Declaration.Variables.Replace(
variableSyntax, variableSyntax.WithInitializer(F.EqualsValueClause(valueSyntax))
))
));
}
FieldDeclarationSyntax WithBoolean(FieldDeclarationSyntax node, bool value)
{
VariableDeclaratorSyntax variableSyntax = node.Declaration.Variables[0];
LiteralExpressionSyntax valueSyntax = F.LiteralExpression(value ? SyntaxKind.TrueLiteralExpression : SyntaxKind.FalseLiteralExpression);
return(node.WithDeclaration(
node.Declaration.WithVariables(node.Declaration.Variables.Replace(
variableSyntax, variableSyntax.WithInitializer(F.EqualsValueClause(valueSyntax))
))
));
}
for (int i = 0; i < members.Count; i++)
{
FieldDeclarationSyntax field = members[i] as FieldDeclarationSyntax;
if (field == null)
{
continue;
}
string fieldName = field.Declaration.Variables[0].Identifier.Text;
switch (fieldName)
{
case "References":
field = WithValue(field, string.Join(";", compilation.References.OfType <PortableExecutableReference>().Select(x => x.FilePath)));
break;
case "Files":
field = WithValue(field, string.Join(";", compilation.SyntaxTrees.Select(x => x.FilePath)));
break;
case "AssemblyName":
field = WithValue(field, compilation.AssemblyName);
break;
case "ErrorFile":
field = WithValue(field, errorFile);
break;
case "Written":
field = WithBoolean(field, OutputAllTreesAttribute.Instance != null);
break;
case "BreakAtEnd":
field = WithBoolean(field, attribute.DisplayEndOfCompilationMessage);
break;
case "BreakAtStart":
field = WithBoolean(field, attribute.BreakDuringStart);
break;
default:
continue;
}
members = members.Replace(members[i], field);
}
// Return the modified compilation.
return(compilation.AddSyntaxTrees(
generatedSyntaxTree
.WithCometaryOptions(this)
.WithRoot(
generatedRoot.WithMembers(generatedRoot.Members.Replace(originalClassSyntax, classSyntax.WithMembers(members))
)
)
));
}
CompilationPipeline += EditCompilation;
}
internal DebuggingEditor(DebugCometaryAttribute attribute)
{
Attribute = attribute;
}