def open(self, path, remote=None, mode="r", encoding=None):
"""Opens a specified resource as a file descriptor"""
out, = self.find_outs_by_path(path)
if out.isdir():
raise ValueError("Can't open a dir")
cache_file = self.cache.local.checksum_to_path_info(out.checksum)
cache_file = fspath_py35(cache_file)
if os.path.exists(cache_file):
return _open(cache_file, mode=mode, encoding=encoding)
try:
remote_obj = self.cloud.get_remote(remote)
remote_info = remote_obj.checksum_to_path_info(out.checksum)
return remote_obj.open(remote_info, mode=mode, encoding=encoding)
except RemoteActionNotImplemented:
with self.state:
cache_info = out.get_used_cache(remote=remote)
self.cloud.pull(cache_info, remote=remote)
# Since pull may just skip with a warning, we need to check it here
if not os.path.exists(cache_file):
raise OutputFileMissingError(relpath(path, self.root_dir))
return _open(cache_file, mode=mode, encoding=encoding)
def open(self, path, remote=None, mode="r", encoding=None):
"""Opens a specified resource as a file descriptor"""
try:
with self._open(path, remote, mode, encoding) as fd:
yield fd
except FileNotFoundError:
raise OutputFileMissingError(relpath(path, self.root_dir))