C#: Ensure that Folder entities exist for Compilation entities

Author: hvitved

csharp/extractor/Semmle.Extraction.CSharp/Entities/Compilations/Compilation.cs

@@ -32,9 +32,13 @@ public override void Populate(TextWriter trapFile)
         {
             var assembly = Assembly.CreateOutputAssembly(Context);
 
-            trapFile.compilations(this, FileUtils.ConvertToUnix(cwd));
+            var path = Context.ExtractionContext.PathTransformer.Transform(cwd);
+            trapFile.compilations(this, path.Value);
             trapFile.compilation_assembly(this, assembly);
 
+            // Ensure that a `Folder` entity exists
+            Folder.Create(Context, path);
+
             // Arguments
             var expandedIndex = 0;
             for (var i = 0; i < args.Length; i++)