Upgrade versions of vendored libs

vendor/github.com/cockroachdb/pebble/objstorage/remote/localfs.go

@@ -0,0 +1,118 @@
+// Copyright 2023 The LevelDB-Go and Pebble Authors. All rights reserved. Use
+// of this source code is governed by a BSD-style license that can be found in
+// the LICENSE file.
+
+package remote
+
+import (
+	"context"
+	"io"
+	"os"
+	"path"
+
+	"github.com/cockroachdb/pebble/vfs"
+)
+
+// NewLocalFS returns a vfs-backed implementation of the remote.Storage
+// interface (for testing). All objects will be stored at the directory
+// dirname.
+func NewLocalFS(dirname string, fs vfs.FS) Storage {
+	store := &localFSStore{
+		dirname: dirname,
+		vfs:     fs,
+	}
+	return store
+}
+
+// localFSStore is a vfs-backed implementation of the remote.Storage
+// interface (for testing).
+type localFSStore struct {
+	dirname string
+	vfs     vfs.FS
+}
+
+var _ Storage = (*localFSStore)(nil)
+
+// Close is part of the remote.Storage interface.
+func (s *localFSStore) Close() error {
+	*s = localFSStore{}
+	return nil
+}
+
+// ReadObject is part of the remote.Storage interface.
+func (s *localFSStore) ReadObject(
+	ctx context.Context, objName string,
+) (_ ObjectReader, objSize int64, _ error) {
+	f, err := s.vfs.Open(path.Join(s.dirname, objName))
+	if err != nil {
+		return nil, 0, err
+	}
+	stat, err := f.Stat()
+	if err != nil {
+		return nil, 0, err
+	}
+
+	return &localFSReader{f}, stat.Size(), nil
+}
+
+type localFSReader struct {
+	file vfs.File
+}
+
+var _ ObjectReader = (*localFSReader)(nil)
+
+// ReadAt is part of the shared.ObjectReader interface.
+func (r *localFSReader) ReadAt(_ context.Context, p []byte, offset int64) error {
+	n, err := r.file.ReadAt(p, offset)
+	// https://pkg.go.dev/io#ReaderAt
+	if err == io.EOF && n == len(p) {
+		return nil
+	}
+	return err
+}
+
+// Close is part of the shared.ObjectReader interface.
+func (r *localFSReader) Close() error {
+	r.file.Close()
+	r.file = nil
+	return nil
+}
+
+// CreateObject is part of the remote.Storage interface.
+func (s *localFSStore) CreateObject(objName string) (io.WriteCloser, error) {
+	file, err := s.vfs.Create(path.Join(s.dirname, objName))
+	return file, err
+}
+
+// List is part of the remote.Storage interface.
+func (s *localFSStore) List(prefix, delimiter string) ([]string, error) {
+	// TODO(josh): For the intended use case of localfs.go of running 'pebble bench',
+	// List can always return <nil, nil>, since this indicates a file has only one ref,
+	// and since `pebble bench` implies running in a single-pebble-instance context.
+	// https://github.com/cockroachdb/pebble/blob/a9a079d4fb6bf4a9ebc52e4d83a76ad4cbf676cb/objstorage/objstorageprovider/shared.go#L292
+	return nil, nil
+}
+
+// Delete is part of the remote.Storage interface.
+func (s *localFSStore) Delete(objName string) error {
+	return s.vfs.Remove(path.Join(s.dirname, objName))
+}
+
+// Size is part of the remote.Storage interface.
+func (s *localFSStore) Size(objName string) (int64, error) {
+	f, err := s.vfs.Open(path.Join(s.dirname, objName))
+	if err != nil {
+		return 0, err
+	}
+	defer f.Close()
+	stat, err := f.Stat()
+	if err != nil {
+		return 0, err
+	}
+	return stat.Size(), nil
+}
+
+// IsNotExistError is part of the remote.Storage interface.
+func (s *localFSStore) IsNotExistError(err error) bool {
+	return err == os.ErrNotExist
+}