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Consolidate FilesystemType resolution. #3045

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Consolidate FilesystemType resolution. #3045

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23 changes: 23 additions & 0 deletions checkpoint/orbax/checkpoint/_src/path/storage_backend.py
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Original file line number Diff line number Diff line change
Expand Up @@ -19,13 +19,36 @@
and local file systems are provided here
"""

from __future__ import annotations

import abc
import dataclasses
import enum

from absl import logging
from etils import epath
from orbax.checkpoint._src.path import atomicity_types
from orbax.checkpoint._src.path import gcs_utils
from orbax.checkpoint._src.path import types
from orbax.checkpoint.google.path import cns2_utils


@enum.unique
class FilesystemType(enum.Enum):
"""Enum class for supported file system types."""

GCS = 'GCS'
LOCAL = 'LOCAL'


@classmethod
def resolve(cls, path: types.PathLike) -> FilesystemType:
path = epath.Path(path)
if gcs_utils.is_gcs_path(path):
return cls.GCS
if path.parts[0] != '/':
raise ValueError(f'Invalid path {path!r}: not absolute.')
return cls.LOCAL


@dataclasses.dataclass(frozen=True)
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