circular-dependency-checker

Detects cyclic dependencies in Godot projects that cause "bad address index" errors.

Quick start

python circular_dependency_checker.py <path-to-godot-project>

Why this exists

In GDScript, preload() calls at the top of a script are resolved at parse time. If script A preloads script B and B preloads A (directly or transitively), Godot raises a cryptic "bad address index" error at runtime — not a clear circular-import message. This tool walks all .gd files, builds a directed dependency graph from class_name, extends, and type annotations, then reports any cycles before you hit that error in the engine.

Sample output

Checking /path/to/my-godot-project...
Cycle detected: PlayerState -> StateMachine -> PlayerState
Cycle detected: Enemy -> EnemyAI -> BaseAI -> Enemy
2 cycle(s) found. Fix preload order or use load() with lazy initialization.

If no cycles are found:

No circular dependencies detected.

License

Apache-2.0 — see LICENSE.