github.com/keybase/client/go@v0.0.0-20240309051027-028f7c731f8b/kbfs/libfs/dummy_fs_read_only.go (about)

     1  // Copyright 2020 Keybase Inc. All rights reserved.
     2  // Use of this source code is governed by a BSD
     3  // license that can be found in the LICENSE file.
     4  
     5  package libfs
     6  
     7  import (
     8  	"os"
     9  	"path"
    10  
    11  	"github.com/keybase/client/go/kbfs/libkbfs"
    12  	"github.com/pkg/errors"
    13  	billy "gopkg.in/src-d/go-billy.v4"
    14  )
    15  
    16  // dummyFSReadOnly is a wrapper struct that extends a `libkbfs.NodeFSReadOnly`
    17  // implementation into a full `billy.Filesystem` (which fails all
    18  // write calls to it).
    19  type dummyFSReadOnly struct {
    20  	libkbfs.NodeFSReadOnly
    21  }
    22  
    23  var _ billy.Filesystem = dummyFSReadOnly{}
    24  
    25  func (dfsro dummyFSReadOnly) Create(_ string) (billy.File, error) {
    26  	return nil, errors.New("read-only filesystem")
    27  }
    28  
    29  func (dfsro dummyFSReadOnly) Stat(_ string) (os.FileInfo, error) {
    30  	return nil, errors.New("read-only filesystem")
    31  }
    32  
    33  func (dfsro dummyFSReadOnly) Rename(_, _ string) error {
    34  	return errors.New("read-only filesystem")
    35  }
    36  
    37  func (dfsro dummyFSReadOnly) Remove(_ string) error {
    38  	return errors.New("read-only filesystem")
    39  }
    40  
    41  func (dfsro dummyFSReadOnly) Join(p ...string) string {
    42  	return path.Join(p...)
    43  }
    44  
    45  func (dfsro dummyFSReadOnly) TempFile(_, _ string) (billy.File, error) {
    46  	return nil, errors.New("read-only filesystem")
    47  }
    48  
    49  func (dfsro dummyFSReadOnly) MkdirAll(_ string, _ os.FileMode) error {
    50  	return errors.New("read-only filesystem")
    51  }
    52  
    53  func (dfsro dummyFSReadOnly) Symlink(_, _ string) error {
    54  	return errors.New("read-only filesystem")
    55  }
    56  
    57  func (dfsro dummyFSReadOnly) Chroot(_ string) (billy.Filesystem, error) {
    58  	return nil, errors.New("read-only filesystem")
    59  }
    60  
    61  func (dfsro dummyFSReadOnly) Root() string {
    62  	return ""
    63  }