dvcfs: remove get-file implementation, make dvcfs non-cachable (#8331)

dvcfs: remove get-file implementation

dvc/fs/dvc.py

@@ -10,9 +10,7 @@
 from fsspec.spec import AbstractFileSystem
 from funcy import cached_property, wrap_prop, wrap_with
 
-from dvc.utils.fs import makedirs
 from dvc_objects.fs.base import FileSystem
-from dvc_objects.fs.callbacks import DEFAULT_CALLBACK
 from dvc_objects.fs.path import Path
 
 from .data import DataFileSystem
@@ -66,15 +64,7 @@ def _get_dvc_path(dvc_fs, subkey):
 
 
 class _DVCFileSystem(AbstractFileSystem):  # pylint:disable=abstract-method
-    """DVC + git-tracked files fs.
-
-    Args:
-        repo: DVC or git repo.
-        subrepos: traverse to subrepos (by default, it ignores subrepos)
-        repo_factory: A function to initialize subrepo with, default is Repo.
-        kwargs: Additional keyword arguments passed to the `DataFileSystem()`.
-    """
-
+    cachable = False
     root_marker = "/"
 
     def __init__(
@@ -238,7 +228,7 @@ def _open(
         dvc_path = _get_dvc_path(dvc_fs, subkey)
         return dvc_fs.open(dvc_path, mode=mode)
 
-    def isdvc(self, path, **kwargs):
+    def isdvc(self, path, **kwargs) -> bool:
         key = self._get_key_from_relative(path)
         _, dvc_fs, subkey = self._get_subrepo_info(key)
         dvc_path = _get_dvc_path(dvc_fs, subkey)
@@ -295,27 +285,6 @@ def ls(  # pylint: disable=arguments-differ
 
         return infos
 
-    def get_file(  # pylint: disable=arguments-differ
-        self, rpath, lpath, callback=DEFAULT_CALLBACK, **kwargs
-    ):
-        key = self._get_key_from_relative(rpath)
-        fs_path = self._from_key(key)
-        fs = self.repo.fs
-
-        if self.isdir(rpath):
-            makedirs(lpath, exist_ok=True)
-            return None
-
-        try:
-            fs.get_file(fs_path, lpath, callback=callback, **kwargs)
-            return
-        except FileNotFoundError:
-            _, dvc_fs, subkey = self._get_subrepo_info(key)
-            if not dvc_fs:
-                raise
-        dvc_path = _get_dvc_path(dvc_fs, subkey)
-        dvc_fs.get_file(dvc_path, lpath, callback=callback, **kwargs)
-
     def info(self, path, **kwargs):
         key = self._get_key_from_relative(path)
         ignore_subrepos = kwargs.get("ignore_subrepos", True)

tests/func/test_fs.py

@@ -1,7 +1,6 @@
 import os
 from operator import itemgetter
 
-from dvc.fs.callbacks import Callback
 from dvc.repo import Repo
 
 
@@ -42,57 +41,3 @@ def test_walk_dont_ignore_subrepos(tmp_dir, scm, dvc):
 
     assert set(get_dirs(next(dvc_fs.walk(path)))) == {".dvc", "subdir", ".git"}
     assert set(get_dirs(next(scm_fs.walk("/")))) == {".dvc", "subdir"}
-
-
-def test_callback_on_dvcfs(tmp_dir, dvc, scm, mocker):
-    tmp_dir.dvc_gen({"dir": {"bar": "bar"}}, commit="dvc")
-    tmp_dir.scm_gen({"dir": {"foo": "foo"}}, commit="git")
-
-    fs = dvc.dvcfs
-
-    callback = Callback()
-    fs.get(
-        "dir",
-        (tmp_dir / "dir2").fs_path,
-        callback=callback,
-    )
-
-    assert (tmp_dir / "dir2").read_text() == {"foo": "foo", "bar": "bar"}
-    assert callback.size == 2
-    assert callback.value == 2
-
-    callback = Callback()
-    branch = mocker.spy(callback, "branch")
-    fs.get(
-        os.path.join("dir", "foo"),
-        (tmp_dir / "foo").fs_path,
-        callback=callback,
-    )
-
-    size = os.path.getsize(tmp_dir / "dir" / "foo")
-    assert (tmp_dir / "foo").read_text() == "foo"
-    assert callback.size == 1
-    assert callback.value == 1
-
-    assert branch.call_count == 1
-    assert branch.spy_return.size == size
-    assert branch.spy_return.value == size
-
-    branch.reset_mock()
-
-    callback = Callback()
-    branch = mocker.spy(callback, "branch")
-    fs.get(
-        os.path.join("dir", "bar"),
-        (tmp_dir / "bar").fs_path,
-        callback=callback,
-    )
-
-    size = os.path.getsize(tmp_dir / "dir" / "bar")
-    assert (tmp_dir / "bar").read_text() == "bar"
-    assert callback.size == 1
-    assert callback.value == 1
-
-    assert branch.call_count == 1
-    assert branch.spy_return.size == size
-    assert branch.spy_return.value == size