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package fs
import (
"io/ioutil"
"os"
"path/filepath"
)
// FileSystem defines the methods of an abstract filesystem.
type FileSystem interface {
// ReadDir reads the directory named by dirname and returns a
// list of directory entries.
ReadDir(dirname string) ([]os.FileInfo, error)
// Lstat returns a FileInfo describing the named file. If the file is a
// symbolic link, the returned FileInfo describes the symbolic link. Lstat
// makes no attempt to follow the link.
Lstat(name string) (os.FileInfo, error)
// Join joins any number of path elements into a single path, adding a
// separator if necessary. The result is Cleaned; in particular, all
// empty strings are ignored.
//
// The separator is FileSystem specific.
Join(elem ...string) string
}
// fs represents a FileSystem provided by the os package.
type fs struct{}
func (f *fs) ReadDir(dirname string) ([]os.FileInfo, error) { return ioutil.ReadDir(dirname) }
func (f *fs) Lstat(name string) (os.FileInfo, error) { return os.Lstat(name) }
func (f *fs) Join(elem ...string) string { return filepath.Join(elem...) }
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