🚧 Initial work on Steam source

src/utils/decorators.py

@@ -14,7 +14,7 @@ class MyClass():
 """
 
 from pathlib import Path
-from os import PathLike
+from os import PathLike, environ
 from functools import wraps
 
 
@@ -52,3 +52,21 @@ def replaced_by_schema_key(key: str):  # Decorator builder
         return wrapper
 
     return decorator
+
+
+def replaced_by_env_path(env_var_name: str, suffix: PathLike | None = None):
+    """Replace the method's returned path with a path whose root is the env variable"""
+
+    def decorator(original_function):  # Built decorator (closure)
+        @wraps(original_function)
+        def wrapper(*args, **kwargs):  # func's override
+            try:
+                env_var = environ[env_var_name]
+            except KeyError:
+                return original_function(*args, **kwargs)
+            override = Path(env_var) / suffix
+            return replaced_by_path(override)(original_function)(*args, **kwargs)
+
+        return wrapper
+
+    return decorator