refactor(fsspec): remove upper bound on fsspec (#221)

* refactor(fsspec): remove upper bound on fsspec

We're using `pins` as a dependency in `ibis-framework` and ideally we
can remove the upper-pin on `fsspec` so that doesn't impact our users.
I think the usage of the moved `hash_name` function is the only breaking
change between the current upper pin and most recent release, so I've
added a small workaround to handle the change.

All of the local tests pass, I didn't yet set up sufficient credentials
to handle the various cloud tests.

* vendor in hash_name

* file or local protocols

* update gcs path

* file, local not protocols

* move to custom CacheMappers

* move PinsRscCache to its own mapper

* remove same_name

* fix test paths to be windows compatible

* remove 3.7 support

* specify get_file for RsConnectFs

* keep a call to hash_name

* move gh org machow-> rstudio

---------

Co-authored-by: isabelizimm <isabel.zimmerman@rstudio.com>

Makefile

@@ -26,7 +26,7 @@ README.md:
 test: test-most test-rsc
 
 test-most:
-	pytest pins -m "not fs_rsc" --workers 4 --tests-per-worker 1
+	pytest pins -m "not fs_rsc and not fs_s3" --workers 4 --tests-per-worker 1 -vv
 
 test-rsc:
 	pytest pins -m "fs_rsc"

pins/boards.py

@@ -17,6 +17,7 @@
 from .drivers import load_data, save_data, load_file, default_title
 from .utils import inform, warn_deprecated, ExtendMethodDoc
 from .config import get_allow_rsc_short_name
+from .cache import PinsCache
 
 
 _log = logging.getLogger(__name__)
@@ -733,9 +734,8 @@ def _touch_cache(self, path):
 
         # TODO: assumes same_name set to True. Let's require this be set to
         # instantiate a pins cache.
-        if not hasattr(self.fs, "cached_files"):
+        if not isinstance(self.fs, PinsCache):
             return
-
         path_to_hashed = self.fs._check_file(path)
         return touch_access_time(path_to_hashed)
 
@@ -747,7 +747,7 @@ class BoardManual(BaseBoard):
     --------
     >>> import fsspec
     >>> import os
-    >>> fs = fsspec.filesystem("github", org = "machow", repo = "pins-python")
+    >>> fs = fsspec.filesystem("github", org = "rstudio", repo = "pins-python")
     >>> pin_paths = {"df_csv": "df_csv/20220214T163720Z-9bfad/"}
     >>> board = BoardManual("pins/tests/pins-compat", fs, pin_paths=pin_paths)
 

pins/cache.py

@@ -5,12 +5,12 @@
 import shutil
 import urllib.parse
 
-from fsspec.implementations.cached import SimpleCacheFileSystem, hash_name
+from fsspec.implementations.cached import SimpleCacheFileSystem
 from fsspec import register_implementation
 from pathlib import Path
 
 from .config import get_cache_dir
-from .utils import inform
+from .utils import inform, hash_name
 
 _log = logging.getLogger(__name__)
 
@@ -57,12 +57,62 @@ def prefix_cache(fs, board_base_path):
     return f"{proto_name}_{base_hash}"
 
 
+class HashMapper:
+    def __init__(self, hash_prefix):
+        self.hash_prefix = hash_prefix
+
+    def __call__(self, path: str) -> str:
+        if self.hash_prefix is not None:
+            # optionally make the name relative to a parent path
+            # using the hash of parent path as a prefix, to flatten a bit
+            hash = Path(path).relative_to(Path(self.hash_prefix))
+            return hash
+
+        else:
+            raise NotImplementedError()
+
+
+class PinsAccessTimeCacheMapper:
+    def __init__(self, hash_prefix):
+        self.hash_prefix = hash_prefix
+
+    def __call__(self, path):
+        # hash full path, and put anything after the final / at the end, just
+        # to make it easier to browse.
+        # this has
+        base_name = hash_name(path, False)
+        suffix = Path(path).name
+        return f"{base_name}_{suffix}"
+
+
+class PinsRscCacheMapper:
+    """Modifies the PinsCache to allow hash_prefix to be an RSC server url.
+
+    Note that this class also modifies the first / in a path to be a -, so that
+    pin contents will not be put into subdirectories, for e.g. michael/mtcars/data.txt.
+    """
+
+    def __init__(self, hash_prefix):
+        self.hash_prefix = hash_prefix
+
+    def __call__(self, path):
+        # the main change in this function is that, for same_name, it returns
+        # the full path
+        # change pin path of form <user>/<content> to <user>+<content>
+        hash = path.replace("/", "+", 1)
+        return hash
+
+
 class PinsCache(SimpleCacheFileSystem):
     protocol = "pinscache"
 
-    def __init__(self, *args, hash_prefix=None, **kwargs):
+    def __init__(self, *args, hash_prefix=None, mapper=HashMapper, **kwargs):
         super().__init__(*args, **kwargs)
         self.hash_prefix = hash_prefix
+        self._mapper = mapper(hash_prefix)
+
+    def hash_name(self, path, *args, **kwargs):
+        return self._mapper(path)
 
     def _open(self, path, *args, **kwargs):
         # For some reason, the open method of SimpleCacheFileSystem doesn't
@@ -83,43 +133,14 @@ def _make_local_details(self, path):
 
         return fn
 
-    def hash_name(self, path, same_name):
-        # the main change in this function is that, for same_name, it returns
-        # the full path
-        if same_name:
-            if self.hash_prefix is not None:
-                # optionally make the name relative to a parent path
-                # using the hash of parent path as a prefix, to flatten a bit
-                hash = Path(path).relative_to(Path(self.hash_prefix))
-                return hash
-
-            return path
-        else:
-            raise NotImplementedError()
-
-
-class PinsRscCache(PinsCache):
-    """Modifies the PinsCache to allow hash_prefix to be an RSC server url.
-
-    Note that this class also modifies the first / in a path to be a -, so that
-    pin contents will not be put into subdirectories, for e.g. michael/mtcars/data.txt.
-    """
-
-    protocol = "pinsrsccache"
-
-    def hash_name(self, path, same_name):
-        # the main change in this function is that, for same_name, it returns
-        # the full path
-        if same_name:
-            if self.hash_prefix is None:
-                raise NotImplementedError()
-
-            # change pin path of form <user>/<content> to <user>+<content>
-            hash = path.replace("/", "+", 1)
-            return hash
-
-        else:
-            raise NotImplementedError()
+    # same as upstream, brought in to preserve backwards compatibility
+    def _check_file(self, path):
+        self._check_cache()
+        sha = self._mapper(path)
+        for storage in self.storage:
+            fn = os.path.join(storage, sha)
+            if os.path.exists(fn):
+                return fn
 
 
 class PinsUrlCache(PinsCache):
@@ -154,15 +175,15 @@ def hash_name(self, path, same_name):
 class PinsAccessTimeCache(SimpleCacheFileSystem):
     name = "pinsaccesstimecache"
 
-    def hash_name(self, path, same_name):
-        if same_name:
-            raise NotImplementedError("same_name not implemented.")
+    def __init__(
+        self, *args, hash_prefix=None, mapper=PinsAccessTimeCacheMapper, **kwargs
+    ):
+        super().__init__(*args, **kwargs)
+        self.hash_prefix = hash_prefix
+        self._mapper = mapper(hash_prefix)
 
-        # hash full path, and put anything after the final / at the end, just
-        # to make it easier to browse.
-        base_name = super().hash_name(path, same_name)
-        suffix = Path(path).name
-        return f"{base_name}_{suffix}"
+    def hash_name(self, path, *args, **kwargs):
+        return self._mapper(path)
 
     def _open(self, path, mode="rb", **kwargs):
         f = super()._open(path, mode=mode, **kwargs)
@@ -177,6 +198,15 @@ def _open(self, path, mode="rb", **kwargs):
 
         return f
 
+    # same as upstream, brought in to preserve backwards compatibility
+    def _check_file(self, path):
+        self._check_cache()
+        sha = self._mapper(path)
+        for storage in self.storage:
+            fn = os.path.join(storage, sha)
+            if os.path.exists(fn):
+                return fn
+
 
 class CachePruner:
     """Prunes the cache directory, across multiple boards.

pins/constructors.py

@@ -3,7 +3,7 @@
 import tempfile
 
 from .boards import BaseBoard, BoardRsConnect, BoardManual
-from .cache import PinsCache, PinsRscCache, PinsAccessTimeCache, prefix_cache
+from .cache import PinsCache, PinsRscCacheMapper, PinsAccessTimeCache, prefix_cache
 from .config import get_data_dir, get_cache_dir
 
 
@@ -56,9 +56,9 @@ def board_deparse(board: BaseBoard):
     if prot == "rsc":
         url = board.fs.api.server_url
         return f"board_connect(server_url={repr(url)}{allow_pickle})"
-    elif prot == "file":
+    elif prot in ["file", ("file", "local")]:
         return f"board_folder({repr(board.board)}{allow_pickle})"
-    elif prot == ["s3", "s3a"]:
+    elif prot in [["s3", "s3a"], ("s3", "s3a")]:
         return f"board_s3({repr(board.board)}{allow_pickle})"
     elif prot == "abfs":
         return f"board_azure({repr(board.board)}{allow_pickle})"
@@ -93,15 +93,15 @@ def board(
 
     Parameters
     ----------
-    protocol:
+    protocol: str
         File system protocol. E.g. file, s3, github, rsc (for Posit Connect).
         See `fsspec.filesystem` for more information.
-    path:
+    path: str
         A base path the board should use. For example, the directory the board lives in,
         or the path to its S3 bucket.
-    versioned:
+    versioned: bool
         Whether or not pins should be versioned.
-    cache:
+    cache: optional, type[DEFAULT]
         Whether to use a cache. By default, pins attempts to select the right cache
         directory, given your filesystem. If `None` is passed, then no cache will be
         used. You can set the cache using the `PINS_CACHE_DIR` environment variable.
@@ -154,8 +154,12 @@ def board(
             board_cache = prefix_cache(fs, hash_prefix)
             cache_dir = os.path.join(base_cache_dir, board_cache)
 
-            fs = PinsRscCache(
-                cache_storage=cache_dir, fs=fs, hash_prefix=hash_prefix, same_names=True
+            fs = PinsCache(
+                cache_storage=cache_dir,
+                fs=fs,
+                hash_prefix=hash_prefix,
+                same_names=True,
+                mapper=PinsRscCacheMapper,
             )
         else:
             # ensures each subdir path is its own cache directory

pins/rsconnect/fs.py

@@ -17,6 +17,7 @@
     RsConnectApiRequestError,
     RSC_CODE_OBJECT_DOES_NOT_EXIST,
 )
+from ..utils import isfilelike
 
 # Misc ----
 
@@ -277,6 +278,14 @@ def get(self, rpath, lpath, recursive=False, *args, **kwargs) -> None:
                 bundle["content_guid"], bundle["id"], parsed.file_name, lpath
             )
 
+    def get_file(self, rpath, lpath, **kwargs):
+        data = self.cat_file(rpath, **kwargs)
+        if isfilelike(lpath):
+            lpath.write(data)
+        else:
+            with open(lpath, "wb") as f:
+                f.write(data)
+
     def exists(self, path: str, **kwargs) -> bool:
         try:
             self.info(path)

pins/tests/test_boards.py

@@ -201,7 +201,6 @@ def test_board_pin_download_filename(board_with_cache, tmp_path):
 
 def test_board_pin_download_no_cache_error(board, tmp_path):
     df = pd.DataFrame({"x": [1, 2, 3]})
-
     path = tmp_path / "data.csv"
     df.to_csv(path, index=False)
 
@@ -210,7 +209,7 @@ def test_board_pin_download_no_cache_error(board, tmp_path):
     assert meta.type == "file"
 
     # file boards work okay, since the board directory itself is the cache
-    if board.fs.protocol == "file":
+    if board.fs.protocol in ["file", ("file", "local")]:
         pytest.skip()
 
     # uncached boards should fail, since nowhere to store the download

pins/tests/test_cache.py

@@ -59,8 +59,8 @@ def test_touch_access_time_auto(some_file):
 
 
 def test_pins_cache_hash_name_preserves():
-    cache = PinsCache(fs=filesystem("file"))
-    assert cache.hash_name("a/b/c.txt", True) == "a/b/c.txt"
+    cache = PinsCache(fs=filesystem("file"), hash_prefix="")
+    assert cache.hash_name("a/b/c.txt") == Path("a/b/c.txt")
 
 
 def test_pins_cache_url_hash_name():

pins/tests/test_constructors.py

@@ -39,7 +39,7 @@ def construct_from_board(board):
     prot = board.fs.protocol
     fs_name = prot if isinstance(prot, str) else prot[0]
 
-    if fs_name == "file":
+    if fs_name in ["file", ("file", "local")]:
         board = c.board_folder(board.board)
     elif fs_name == "rsc":
         board = c.board_rsconnect(
@@ -149,7 +149,7 @@ def test_constructor_board_url_file(tmp_cache, http_example_board_path):
 
 @pytest.mark.skip_on_github
 def test_constructor_board_github(tmp_cache, http_example_board_path, df_csv):
-    board = c.board_github("machow", "pins-python", EXAMPLE_REL_PATH)  # noqa
+    board = c.board_github("rstudio", "pins-python", EXAMPLE_REL_PATH)  # noqa
 
     df = board.pin_read("df_csv")
     assert_frame_equal(df, df_csv)
@@ -190,7 +190,7 @@ def test_constructor_boards(board, df_csv, tmp_cache):
     # check the cache structure -----------------------------------------------
 
     # check cache
-    if board.fs.protocol == "file":
+    if board.fs.protocol in ["file", ("file", "local")]:
         # no caching for local file boards
         pass
     else:

pins/utils.py

@@ -1,3 +1,5 @@
+import hashlib
+import os
 import sys
 
 from functools import update_wrapper
@@ -19,6 +21,14 @@ def warn_deprecated(msg):
     warn(msg, DeprecationWarning)
 
 
+def hash_name(path, same_name):
+    if same_name:
+        hash = os.path.basename(path)
+    else:
+        hash = hashlib.sha256(path.encode()).hexdigest()
+    return hash
+
+
 class ExtendMethodDoc:
     # Note that the indentation assumes these are top-level method docstrings,
     # so are indented 8 spaces (after the initial sentence).
@@ -68,3 +78,11 @@ def __call__(self, *args, **kwargs):
         # which allows all the inspect machinery to give sphinx the __call__
         # attribute we set in __init__.
         raise NotImplementedError()
+
+
+# based off fsspec.isfilelike
+def isfilelike(file) -> bool:
+    for attr in ["read", "close", "tell"]:
+        if not hasattr(file, attr):
+            return False
+    return True

setup.cfg

@@ -24,7 +24,7 @@ zipsafe = False
 
 python_requires = >=3.8
 install_requires =
-    fsspec>=2022.2.0,<2023.9.0
+    fsspec>=2022.2.0
     pyyaml>=3.13
     xxhash>=1.0.0
     pandas>=0.23.0