go 1.16 compatibility

[xakep666]

It seems that future releases of go will bring us new io/fs package with some interfaces for file system (https://tip.golang.org/pkg/io/fs).
Is it possible to make afero compatible with io/fs?

[VoyTechnology]

Based on a quick investigation, it looks like the only place where a change might be needed is

type File interface {
    Stat(name string) (os.FileInfo, error) // return fs.FileInfo instead
}

However, also looking at os package it looks like it would be still working fine without changing it.

type FileInfo = fs.FileInfo

[cugu]

afero uses afero.File while fs uses fs.File, which are quite different so this would require some refactoring.

A simple example:

info, _ := fs.Stat(afero.NewMemMapFs(), ".")
fmt.Println(info)

results in

./main.go:12:38: cannot use afero.NewMemMapFs() (type afero.Fs) as type fs.FS in argument to fs.Stat:
	afero.Fs does not implement fs.FS (wrong type for Open method)
		have Open(string) (afero.File, error)
		want Open(string) (fs.File, error)