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import os
import platform
_WINDOWS_PLATFORM = platform.system() == "Windows"
def combine(path1: str, path2) -> str:
if not path1:
return path2
return "{}/{}".format(path1.rstrip("/"), path2.lstrip("/"))
def split(path: str) -> tuple[str, str]:
if "/" not in path:
return ("", path)
split = path.rsplit("/", 1)
return (split[0] or "/", split[1])
def dirname(path: str) -> str:
return split(path)[0]
def basename(path: str) -> str:
return split(path)[1]
def forcedir(path: str) -> str:
# Ensure the path ends with a trailing forward slash.
if not path.endswith("/"):
return path + "/"
return path
def abspath(path: str) -> str:
# FS objects have no concept of a *current directory*. This simply
# ensures the path starts with a forward slash.
if not path.startswith("/"):
return "/" + path
return path
def isbase(path1: str, path2: str) -> bool:
# Check if `path1` is a base or prefix of `path2`.
_path1 = forcedir(abspath(path1))
_path2 = forcedir(abspath(path2))
return _path2.startswith(_path1)
def frombase(path1: str, path2: str) -> str:
# Get the final path of `path2` that isn't in `path1`.
if not isbase(path1, path2):
raise ValueError(f"path1 must be a prefix of path2: {path1!r} vs {path2!r}")
return path2[len(path1) :]
def relpath(path: str) -> str:
return path.lstrip("/")
def normpath(path: str) -> str:
normalized = os.path.normpath(path)
if _WINDOWS_PLATFORM:
# os.path.normpath converts backslashes to forward slashes on Windows
# but we want forward slashes, so we convert them back
normalized = normalized.replace("\\", "/")
return normalized
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