import os import sys from typing import Union _Path = Union[str, os.PathLike] def ensure_directory(path): """Ensure that the parent directory of `path` exists""" dirname = os.path.dirname(path) os.makedirs(dirname, exist_ok=True) def same_path(p1: _Path, p2: _Path) -> bool: """Differs from os.path.samefile because it does not require paths to exist. Purely string based (no comparison between i-nodes). >>> same_path("a/b", "./a/b") True >>> same_path("a/b", "a/./b") True >>> same_path("a/b", "././a/b") True >>> same_path("a/b", "./a/b/c/..") True >>> same_path("a/b", "../a/b/c") False >>> same_path("a", "a/b") False """ return normpath(p1) == normpath(p2) def normpath(filename: _Path) -> str: """Normalize a file/dir name for comparison purposes.""" # See pkg_resources.normalize_path for notes about cygwin file = os.path.abspath(filename) if sys.platform == 'cygwin' else filename return os.path.normcase(os.path.realpath(os.path.normpath(file)))