Co-authored-by: deepsource-autofix[bot] <62050782+deepsource-autofix[bot]@users.noreply.github.com>
163 lines
4.2 KiB
Go
163 lines
4.2 KiB
Go
// Copyright (C) 2017 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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package scanner
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import (
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"errors"
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"fmt"
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"io"
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"path/filepath"
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"strings"
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"time"
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"github.com/syncthing/syncthing/lib/fs"
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"github.com/syncthing/syncthing/lib/protocol"
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)
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type infiniteFS struct {
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fs.Filesystem
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width int // number of files and directories per level
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depth int // number of tree levels to simulate
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filesize int64 // size of each file in bytes
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}
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var errNotSupp = errors.New("not supported")
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func (i infiniteFS) Lstat(name string) (fs.FileInfo, error) {
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return fakeInfo{name, i.filesize}, nil
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}
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func (i infiniteFS) Stat(name string) (fs.FileInfo, error) {
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return fakeInfo{name, i.filesize}, nil
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}
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func (i infiniteFS) DirNames(name string) ([]string, error) {
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// Returns a list of fake files and directories. Names are such that
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// files appear before directories - this makes it so the scanner will
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// actually see a few files without having to reach the max depth.
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var names []string
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for j := 0; j < i.width; j++ {
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names = append(names, fmt.Sprintf("aa-file-%d", j))
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}
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if len(fs.PathComponents(name)) < i.depth {
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for j := 0; j < i.width; j++ {
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names = append(names, fmt.Sprintf("zz-dir-%d", j))
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}
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}
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return names, nil
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}
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func (i infiniteFS) Open(name string) (fs.File, error) {
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return &fakeFile{name, i.filesize, 0}, nil
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}
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func (infiniteFS) PlatformData(_ string) (protocol.PlatformData, error) {
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return protocol.PlatformData{}, nil
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}
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type singleFileFS struct {
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fs.Filesystem
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name string
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filesize int64
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}
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func (s singleFileFS) Lstat(name string) (fs.FileInfo, error) {
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switch name {
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case ".":
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return fakeInfo{".", 0}, nil
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case s.name:
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return fakeInfo{s.name, s.filesize}, nil
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default:
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return nil, errors.New("no such file")
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}
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}
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func (s singleFileFS) Stat(name string) (fs.FileInfo, error) {
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switch name {
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case ".":
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return fakeInfo{".", 0}, nil
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case s.name:
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return fakeInfo{s.name, s.filesize}, nil
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default:
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return nil, errors.New("no such file")
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}
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}
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func (s singleFileFS) DirNames(name string) ([]string, error) {
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if name != "." {
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return nil, errors.New("no such file")
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}
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return []string{s.name}, nil
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}
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func (s singleFileFS) Open(name string) (fs.File, error) {
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if name != s.name {
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return nil, errors.New("no such file")
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}
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return &fakeFile{s.name, s.filesize, 0}, nil
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}
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func (singleFileFS) Options() []fs.Option {
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return nil
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}
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func (singleFileFS) PlatformData(_ string) (protocol.PlatformData, error) {
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return protocol.PlatformData{}, nil
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}
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type fakeInfo struct {
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name string
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size int64
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}
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func (f fakeInfo) Name() string { return f.name }
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func (fakeInfo) Mode() fs.FileMode { return 0755 }
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func (f fakeInfo) Size() int64 { return f.size }
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func (fakeInfo) ModTime() time.Time { return time.Unix(1234567890, 0) }
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func (f fakeInfo) IsDir() bool {
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return strings.Contains(filepath.Base(f.name), "dir") || f.name == "."
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}
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func (f fakeInfo) IsRegular() bool { return !f.IsDir() }
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func (fakeInfo) IsSymlink() bool { return false }
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func (fakeInfo) Owner() int { return 0 }
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func (fakeInfo) Group() int { return 0 }
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type fakeFile struct {
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name string
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size int64
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readOffset int64
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}
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func (f *fakeFile) Name() string {
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return f.name
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}
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func (f *fakeFile) Read(bs []byte) (int, error) {
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remaining := f.size - f.readOffset
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if remaining == 0 {
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return 0, io.EOF
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}
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if remaining < int64(len(bs)) {
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f.readOffset = f.size
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return int(remaining), nil
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}
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f.readOffset += int64(len(bs))
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return len(bs), nil
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}
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func (f *fakeFile) Stat() (fs.FileInfo, error) {
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return fakeInfo{f.name, f.size}, nil
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}
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func (*fakeFile) Write([]byte) (int, error) { return 0, errNotSupp }
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func (*fakeFile) WriteAt([]byte, int64) (int, error) { return 0, errNotSupp }
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func (*fakeFile) Close() error { return nil }
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func (*fakeFile) Truncate(_ int64) error { return errNotSupp }
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func (*fakeFile) ReadAt([]byte, int64) (int, error) { return 0, errNotSupp }
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func (*fakeFile) Seek(int64, int) (int64, error) { return 0, errNotSupp }
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func (*fakeFile) Sync() error { return nil }
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