def _find_path(self, path: str) -> Optional[graph.CommandGraphNode]:
"""Find an object relative to the current node
Finds and returns the command graph node that is defined relative to
the current node.
"""
root = graph.CommandGraphRoot() if path.startswith("/") else self._current_node
parts = [i for i in path.split("/") if i]
return self._find_node(root, *parts)
def do_cd(self, arg) -> str:
"""Change to another path.
Examples
========
cd layout/0
cd ../layout
"""
if arg is None:
self._current_node = graph.CommandGraphRoot()
return '/'
next_node = self._find_path(arg)
if next_node is not None:
self._current_node = next_node
return format_selectors(self._current_node.selectors) or '/'
else:
return "No such path."
def __init__(self, client: CommandInterface, completekey="tab") -> None:
self._client = client
self._current_node = graph.CommandGraphRoot() # type: graph.CommandGraphNode
self._completekey = completekey
self._builtins = [i[3:] for i in dir(self) if i.startswith("do_")]