Only override root-justfile variable assignments (#2815)

src/justfile.rs

@@ -86,7 +86,15 @@ impl<'src> Justfile<'src> {
     scopes.get(&self.module_path).unwrap();
 
     for module in self.modules.values() {
-      module.evaluate_assignments(arena, config, dotenv, overrides, root, scopes, search)?;
+      module.evaluate_assignments(
+        arena,
+        config,
+        dotenv,
+        &BTreeMap::new(),
+        root,
+        scopes,
+        search,
+      )?;
     }
 
     Ok(())

tests/modules.rs

@@ -987,7 +987,7 @@ fn empty_doc_attribute_on_module() {
   Test::new()
     .write("foo.just", "")
     .justfile(
-      r"
+      "
         # Suppressed comment
         [doc]
         mod foo
@@ -998,3 +998,23 @@ fn empty_doc_attribute_on_module() {
     .stdout("Available recipes:\n    foo ...\n")
     .run();
 }
+
+#[test]
+fn overrides_work_when_submodule_is_present() {
+  Test::new()
+    .write("bar.just", "")
+    .justfile(
+      "
+        mod bar
+
+        x := 'a'
+
+        foo:
+          @echo {{ x }}
+      ",
+    )
+    .test_round_trip(false)
+    .arg("x=b")
+    .stdout("b\n")
+    .run();
+}