fix: prevent inifinite recursion in CommandTree.__repr__

mecha/config.py

@@ -162,5 +162,21 @@ def resolve(
 
         return self
 
+    def __repr__(self) -> str:
+        args = ", ".join(
+            f"{name}="
+            + (
+                "{" + ", ".join(f"{k!r}: ..." for k in value) + "}"
+                if name == "children"
+                else repr(value)
+            )
+            for name in self.__class__.__fields__
+            if (value := getattr(self, name))
+        )
+        return f"{self.__class__.__name__}({args})"
+
+    def __str__(self) -> str:
+        return self.__repr__()
+
 
 CommandTree.update_forward_refs()

tests/test_spec.py

@@ -26,3 +26,15 @@ def test_parsers(snapshot: SnapshotFixture, mc: Mecha):
     undefined_parsers = all_used_parser - all_defined_parsers
 
     assert not undefined_parsers
+
+
+def test_repr(snapshot: SnapshotFixture, mc: Mecha):
+    assert (
+        str(mc.spec.tree.get("execute", "if", "score"))
+        == "CommandTree(type='literal', children={'target': ...})"
+    )
+
+    assert (
+        str(mc.spec.tree.get("execute", "if", "score", "target"))
+        == "CommandTree(type='argument', parser='minecraft:score_holder', properties={'amount': 'single'}, children={'targetObjective': ...})"
+    )