Fix leaking of types and enums from other imported specs to specs whi…

…ch does not import them explicitly

_(review in whitespace ignored mode)_

shared/src/main/scala/io/kaitai/struct/format/ClassSpec.scala

@@ -81,6 +81,9 @@ case class ClassSpec(
 
   var seqSize: Sized = NotCalculatedSized
 
+  /** The list of top-level type specifications which contains import of this type. */
+  var importedInto = mutable.ListBuffer[ClassSpec]()
+
   def toDataType: DataType = {
     val cut = CalcUserType(name, None)
     cut.classSpec = Some(this)

shared/src/main/scala/io/kaitai/struct/precompile/LoadImports.scala

@@ -32,7 +32,7 @@ class LoadImports(specs: ClassSpecs) {
         loadImport(
           name,
           curClass.meta.path ++ List("imports", idx.toString),
-          Some(curClass.fileNameAsStr),
+          curClass,
           workDir
         )
       }).map((x) => x.flatten)
@@ -44,9 +44,10 @@ class LoadImports(specs: ClassSpecs) {
     Future.sequence(List(thisMetaFuture, nestedFuture)).map((x) => x.flatten)
   }
 
-  private def loadImport(name: String, path: List[String], inFile: Option[String], workDir: ImportPath): Future[List[ClassSpec]] = {
+  private def loadImport(name: String, path: List[String], curClass: ClassSpec, workDir: ImportPath): Future[List[ClassSpec]] = {
     Log.importOps.info(() => s".. LoadImports: loadImport($name, workDir = $workDir)")
 
+    val inFile = Some(curClass.fileNameAsStr)
     val impPath = ImportPath.fromString(name)
     val fullPath = ImportPath.add(workDir, impPath)
 
@@ -63,8 +64,9 @@ class LoadImports(specs: ClassSpecs) {
         s".. LoadImports: loadImport($name, workDir = $workDir), got spec=$specNameAsStr"
       })
       optSpec match {
-        case Some(spec) =>
-          val specName = spec.name.head
+        case Some(importedSpec) =>
+          importedSpec.importedInto += curClass
+          val specName = importedSpec.name.head
           // Check if spec name does not match file name. If it doesn't match,
           // it is probably already a serious error.
           if (name != specName)
@@ -88,12 +90,12 @@ class LoadImports(specs: ClassSpecs) {
           val isNewSpec = specs.synchronized {
             val isNew = !specs.contains(specName)
             if (isNew) {
-              specs(specName) = spec
+              specs(specName) = importedSpec
             }
             isNew
           }
           if (isNewSpec) {
-            processClass(spec, ImportPath.updateWorkDir(workDir, impPath))
+            processClass(importedSpec, ImportPath.updateWorkDir(workDir, impPath))
           } else {
             Log.importOps.warn(() => s"... we have that already, ignoring")
             Future { List() }

shared/src/main/scala/io/kaitai/struct/precompile/ResolveTypes.scala

@@ -9,8 +9,11 @@ import io.kaitai.struct.problems._
 /**
   * A collection of methods that resolves user types and enum types, i.e.
   * converts names into ClassSpec / EnumSpec references.
+  *
+  * This step runs for each top-level [[format.ClassSpec]].
   */
 class ResolveTypes(specs: ClassSpecs, topClass: ClassSpec, opaqueTypes: Boolean) extends PrecompileStep {
+  /** Resolves references to types and enums in `topClass` and all its nested types. */
   override def run(): Iterable[CompilationProblem] =
     topClass.mapRec(resolveUserTypes).map(problem => problem.localizedInType(topClass))
 
@@ -68,6 +71,14 @@ class ResolveTypes(specs: ClassSpecs, topClass: ClassSpec, opaqueTypes: Boolean)
     }
   }
 
+  /**
+    * Resolves `typeName` reference used in `curClass` to a type definition, or
+    * returns [[TypeNotFoundErr]] error.
+    *
+    * @param curClass Class that contains member
+    * @param typeName A reference to a type that need to be resolved
+    * @param path A path to the attribute in KSY where the error should be reported if reference is unknown
+    */
   def resolveUserType(curClass: ClassSpec, typeName: List[String], path: List[String]): (Option[ClassSpec], Option[CompilationProblem]) = {
     val res = realResolveUserType(curClass, typeName, path)
 
@@ -103,7 +114,7 @@ class ResolveTypes(specs: ClassSpecs, topClass: ClassSpec, opaqueTypes: Boolean)
         // No further names to resolve, here's our answer
         Some(nestedClass)
       } else {
-        // Try to resolve recursively
+        // Try to resolve recursively in all nested classes
         realResolveUserType(nestedClass, restNames, path)
       }
     )
@@ -124,12 +135,18 @@ class ResolveTypes(specs: ClassSpecs, topClass: ClassSpec, opaqueTypes: Boolean)
               // If there's None => no luck at all
               val resolvedTop = specs.get(firstName)
               resolvedTop match {
-                case None => None
-                case Some(classSpec) => if (restNames.isEmpty) {
-                  resolvedTop
-                } else {
-                  realResolveUserType(classSpec, restNames, path)
+                // We should use that spec if it is imported in our file (which is represented
+                // by our top-level class). It `topClass` imports `classSpec`, we could try to
+                // resolve type in it
+                // TODO: if type is defined in spec, we could add a suggestion to error to add missing import
+                case Some(classSpec) if (classSpec.importedInto.contains(topClass)) => {
+                  if (restNames.isEmpty) {
+                    resolvedTop
+                  } else {
+                    realResolveUserType(classSpec, restNames, path)
+                  }
                 }
+                case _ => None
               }
             }
         }
@@ -183,13 +200,19 @@ class ResolveTypes(specs: ClassSpecs, topClass: ClassSpec, opaqueTypes: Boolean)
               // If there's None => no luck at all
               val resolvedTop = specs.get(firstName)
               resolvedTop match {
-                case None => None
-                case Some(classSpec) => if (restNames.isEmpty) {
-                  // resolved everything, but this points to a type name, not enum name
-                  None
-                } else {
-                  resolveEnumSpec(classSpec, restNames)
+                // We should use that spec if it is imported in our file (which is represented
+                // by our top-level class). It `topClass` imports `classSpec`, we could try to
+                // resolve type in it
+                // TODO: if type is defined in spec, we could add a suggestion to error to add missing import
+                case Some(classSpec) if (classSpec.importedInto.contains(topClass)) => {
+                  if (restNames.isEmpty) {
+                    // resolved everything, but this points to a type name, not enum name
+                    None
+                  } else {
+                    resolveEnumSpec(classSpec, restNames)
+                  }
                 }
+                case _ => None
               }
             }
         }