def discover_header(local_url: str) -> Mapping[str, str]:
"obtain meta description of local resource"
local = urlparse(local_url)
header_dict = dict() # never empty
try:
header_dict = SUDO.xattr_load(local.path)
except:
pass
if not header_dict:
header_dict = produce_header(local.path)
return header_dict
def synchronize_header(source: str, target: str) -> None:
"transfer header metadata between local paths"
header_dict = dict() # never empty
try:
header_dict = SUDO.xattr_load(source)
except:
pass
if not header_dict:
header_dict = produce_header(source)
try:
SUDO.xattr_save(target, header_dict)
except:
SUDO.files_sync_time(source, target)
