def assertFS(path, remainder=None):
"""Assert existence of fs.
Step up one path segment until the directory exists, create missing directories and return filesystem.
Args:
path (basestring)
remainder (basestring)
Returns:
fs
"""
if not os.path.isdir(path):
head, tail = os.path.split(path)
return assertFS(head, "/".join(filter(bool, [tail, remainder])))
fs = OSFS(path)
if remainder is not None:
fs.makedirs(unicode(remainder))
fs = fs.opendir(unicode(remainder))
return fs
def reduce_path(carry_fs, value):
""" Reduce path by opening or creating each segment and returning the last.
Args:
carry_fs (fs): Opened filesystem
value (str): Next path segment
Returns:
fs
"""
if not isinstance(carry_fs, FS):
carry_fs = OSFS(carry_fs + separator)
if not carry_fs.isdir(value):
carry_fs.makedirs(value)
# open next carry_fs
next_carry_fs = OSFS(carry_fs.getsyspath(value))
# close carry_fs
carry_fs.close()
return next_carry_fs
