зеркало из https://github.com/golang/tools.git
81 строка
1.7 KiB
Go
81 строка
1.7 KiB
Go
// Copyright 2021 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build go1.16
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// +build go1.16
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package vfs
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import (
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"io/fs"
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"os"
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"path"
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"strings"
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)
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// FromFS converts an fs.FS to the FileSystem interface.
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func FromFS(fsys fs.FS) FileSystem {
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return &fsysToFileSystem{fsys}
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}
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type fsysToFileSystem struct {
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fsys fs.FS
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}
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func (f *fsysToFileSystem) fsPath(name string) string {
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name = path.Clean(name)
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if name == "/" {
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return "."
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}
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return strings.TrimPrefix(name, "/")
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}
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func (f *fsysToFileSystem) Open(name string) (ReadSeekCloser, error) {
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file, err := f.fsys.Open(f.fsPath(name))
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if err != nil {
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return nil, err
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}
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if rsc, ok := file.(ReadSeekCloser); ok {
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return rsc, nil
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}
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return &noSeekFile{f.fsPath(name), file}, nil
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}
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func (f *fsysToFileSystem) Lstat(name string) (os.FileInfo, error) {
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return fs.Stat(f.fsys, f.fsPath(name))
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}
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func (f *fsysToFileSystem) Stat(name string) (os.FileInfo, error) {
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return fs.Stat(f.fsys, f.fsPath(name))
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}
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func (f *fsysToFileSystem) RootType(name string) RootType { return "" }
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func (f *fsysToFileSystem) ReadDir(name string) ([]os.FileInfo, error) {
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dirs, err := fs.ReadDir(f.fsys, f.fsPath(name))
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var infos []os.FileInfo
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for _, d := range dirs {
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info, err1 := d.Info()
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if err1 != nil {
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if err == nil {
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err = err1
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}
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continue
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}
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infos = append(infos, info)
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}
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return infos, err
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}
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func (f *fsysToFileSystem) String() string { return "io/fs" }
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type noSeekFile struct {
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path string
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fs.File
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}
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func (f *noSeekFile) Seek(offset int64, whence int) (int64, error) {
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return 0, &fs.PathError{Op: "seek", Path: f.path, Err: fs.ErrInvalid}
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}
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