Support for Scala dependency detection

tests/samples/codefiles/scala.scala

@@ -0,0 +1,14 @@
+package com.wakatime.test
+
+import com.alpha.SomeClass
+import com.bravo.something.{User, UserPreferences}
+import com.charlie.{Delta => Foxtrot}
+import __root__.golf._
+import com.hotel.india._
+import juliett.kilo
+
+object SimpleObject {
+  def method(arg: String): String = {
+    return "value"
+  }
+}

tests/test_dependencies.py

@@ -420,3 +420,18 @@ class DependenciesTestCase(TestCase):
             expected_lines=18,
             entity='objective-c.m',
         )
+
+    def test_scala_dependencies_detected(self):
+        self.shared(
+            expected_dependencies=[
+                'com.alpha.SomeClass',
+                'com.bravo.something',
+                'com.charlie',
+                'golf',
+                'com.hotel.india',
+                'juliett.kilo',
+            ],
+            expected_language='Scala',
+            expected_lines=14,
+            entity='scala.scala',
+        )

wakatime/dependencies/jvm.py

@@ -94,3 +94,39 @@ class JavaParser(TokenParser):
 
     def _process_other(self, token, content):
         pass
+
+
+class ScalaParser(TokenParser):
+    state = None
+
+    def parse(self):
+        for index, token, content in self.tokens:
+            self._process_token(token, content)
+        return self.dependencies
+
+    def _process_token(self, token, content):
+        if self.partial(token) == 'Keyword':
+            self._process_keyword(token, content)
+        elif self.partial(token) == 'Text':
+            self._process_text(token, content)
+        elif self.partial(token) == 'Namespace':
+            self._process_namespace(token, content)
+        else:
+            self._process_other(token, content)
+
+    def _process_keyword(self, token, content):
+        self.state = content
+
+    def _process_text(self, token, content):
+        pass
+
+    def _process_namespace(self, token, content):
+        if self.state == 'import':
+            self.append(self._format(content))
+        self.state = None
+
+    def _process_other(self, token, content):
+        self.state = None
+
+    def _format(self, content):
+        return content.strip().lstrip('__root__').strip('_').strip('.')