feat: add repomap support for Scala

Resolves #3578

aider/queries/tree-sitter-languages/scala-tags.scm

@@ -0,0 +1,65 @@
+; Definitions
+
+(package_clause
+  name: (package_identifier) @name.definition.module) @definition.module
+
+(trait_definition
+  name: (identifier) @name.definition.interface) @definition.interface
+
+(enum_definition
+  name: (identifier) @name.definition.enum) @definition.enum
+
+(simple_enum_case
+  name: (identifier) @name.definition.class) @definition.class
+
+(full_enum_case
+  name: (identifier) @name.definition.class) @definition.class
+
+(class_definition
+  name: (identifier) @name.definition.class) @definition.class
+
+(object_definition
+  name: (identifier) @name.definition.object) @definition.object
+
+(function_definition
+  name: (identifier) @name.definition.function) @definition.function
+
+(val_definition
+  pattern: (identifier) @name.definition.variable) @definition.variable
+
+(given_definition
+  name: (identifier) @name.definition.variable) @definition.variable
+
+(var_definition
+  pattern: (identifier) @name.definition.variable) @definition.variable
+
+(val_declaration
+  name: (identifier) @name.definition.variable) @definition.variable
+
+(var_declaration
+  name: (identifier) @name.definition.variable) @definition.variable
+
+(type_definition
+  name: (type_identifier) @name.definition.type) @definition.type
+
+(class_parameter
+  name: (identifier) @name.definition.property) @definition.property
+
+; References
+
+(call_expression
+  (identifier) @name.reference.call) @reference.call
+
+(instance_expression
+  (type_identifier) @name.reference.interface) @reference.interface
+
+(instance_expression
+  (generic_type
+    (type_identifier) @name.reference.interface)) @reference.interface
+
+(extends_clause
+  (type_identifier) @name.reference.class) @reference.class
+
+(extends_clause
+  (generic_type
+    (type_identifier) @name.reference.class)) @reference.class

tests/basic/test_repomap.py

@@ -381,6 +381,9 @@ class TestRepoMapAllLanguages(unittest.TestCase):
     def test_language_udev(self):
         self._test_language_repo_map("udev", "rules", "USB_DRIVER")
 
+    def test_language_scala(self):
+        self._test_language_repo_map("scala", "scala", "Greeter")
+
     def _test_language_repo_map(self, lang, key, symbol):
         """Helper method to test repo map generation for a specific language."""
         # Get the fixture file path and name based on language

tests/fixtures/languages/scala/test.scala

@@ -0,0 +1,61 @@
+package com.example.test
+
+// A trait definition
+trait Greeter {
+  def greet(name: String): String
+}
+
+// A class definition with parameters
+class FormalGreeter(prefix: String) extends Greeter {
+  // A method definition
+  override def greet(name: String): String = {
+    s"$prefix, $name!"
+  }
+  
+  // A val definition
+  val defaultPrefix: String = "Hello"
+  
+  // A var definition
+  var counter: Int = 0
+}
+
+// An object definition
+object GreeterFactory {
+  // A function definition
+  def createGreeter(formal: Boolean): Greeter = {
+    if (formal) {
+      new FormalGreeter("Good day")
+    } else {
+      new CasualGreeter
+    }
+  }
+  
+  // A type definition
+  type GreeterType = Greeter
+}
+
+// An enum definition
+enum Greeting {
+  // Simple enum cases
+  case Hello, Hi, Hey
+  
+  // Full enum case with parameters
+  case Custom(text: String)
+}
+
+// A class that uses generics
+class Container[T](val value: T) {
+  def map[U](f: T => U): Container[U] = new Container(f(value))
+}
+
+// A case class
+case class Person(name: String, age: Int) {
+  def introduce(): String = {
+    val greeter = GreeterFactory.createGreeter(age > 30)
+    greeter.greet(name) + s" I am $age years old."
+  }
+}
+
+class CasualGreeter extends Greeter {
+  override def greet(name: String): String = s"Hey, $name!"
+}