def fileSystemPath(path):
"""Look up the correctly cased path from the file system.
This is only relevant on file systems that are case insensitive such
as Windows.
'/' and '\\' will be left intact.
'.' and '..' will be left intact.
A drive letter will be capitalized.
@param path: The path to look up.
@type path: string
@return: The correctly cased file system path.
@rtype: string
"""
seps = frozenset([os.path.sep, os.path.altsep])
parts = list()
while path:
stem, leaf = os.path.split(path)
if leaf != '.' and leaf != '..':
try:
leaf = _fileSystemBaseName(path, stem, leaf)
except Exception:
pass
parts.append(leaf)
if stem and len(path) > len(stem):
sep = path[len(stem)]
if sep in seps:
parts.append(sep)
path = stem
if not leaf:
# Reached root path
break
if path:
# Capitalise drive letter if found
if len(path) >= 2 and path[1] == ':':
path = path.capitalize()
parts.append(path)
return "".join(reversed(parts))
def relative_path(path, parent_path):
path = normalize_path(path)
parent_path = normalize_path(parent_path)
if os_utils.is_win():
path = path.capitalize()
parent_path = parent_path.capitalize()
if not path.startswith(parent_path):
raise ValueError(path + ' is not subpath of ' + parent_path)
relative_path = path[len(parent_path):]
if relative_path.startswith(os.path.sep):
return relative_path[1:]
return relative_path