add todo

Author: bishabosha

compiler/src/dotty/tools/dotc/sbt/ExtractDependencies.scala

@@ -475,18 +475,19 @@ class DependencyRecorder {
       }
     }
 
-    val depFile = dep.toClass.associatedFile
+    val depClass = dep.toClass
+    val depFile = depClass.associatedFile
     if depFile != null then {
       // Cannot ignore inheritance relationship coming from the same source (see sbt/zinc#417)
       def allowLocal = dep.context == DependencyByInheritance || dep.context == LocalDependencyByInheritance
       if depFile.hasTastyExtension then
-        processExternalDependency(depFile, dep.toClass.binaryClassName, convertTasty = true)
+        processExternalDependency(depFile, depClass.binaryClassName, convertTasty = true)
       else if depFile.hasClassExtension then
-        processExternalDependency(depFile, dep.toClass.binaryClassName, convertTasty = false)
+        processExternalDependency(depFile, depClass.binaryClassName, convertTasty = false)
       else if allowLocal || depFile != sourceFile.file then
         // We cannot ignore dependencies coming from the same source file because
         // the dependency info needs to propagate. See source-dependencies/trait-trait-211.
-        val toClassName = classNameAsString(dep.toClass)
+        val toClassName = classNameAsString(depClass)
         cb.classDependency(toClassName, fromClassName, dep.context)
     }
   }

compiler/src/dotty/tools/io/AbstractFile.scala

@@ -97,8 +97,10 @@ abstract class AbstractFile extends Iterable[AbstractFile] {
   /** Returns the path of this abstract file in a canonical form. */
   def canonicalPath: String = if (jpath == null) path else jpath.normalize.toString
 
-  /** Checks extension case insensitively. */
+  /** Checks extension case insensitively. TODO: change to enum */
   def hasExtension(other: String): Boolean = extension == other.toLowerCase
+
+  /** Returns the extension of this abstract file. TODO: store as an enum to avoid costly comparisons */
   val extension: String = Path.extension(name)
 
   /** The absolute file, if this is a relative file. */