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fs.go
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fs.go
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package fsutil
import (
"io/fs"
"os"
"testing/fstest"
)
// FS is the host filesystem implementation.
var FS FileSystem = DefaultFS{}
// MkdirAll calls FS.MakedirAll
func MkdirAll(path string, perm os.FileMode) error { return FS.MkdirAll(path, perm) }
// Open calls FS.Open
func Open(name string) (fs.File, error) { return FS.Open(name) }
// FS is abstraction for filesystem.
type FileSystem interface {
MkdirAll(path string, perm os.FileMode) error
fs.FS
}
var _ FileSystem = DefaultFS{}
var _ FileSystem = fakeFS{}
// DefaultFS is the default OS implementation of FileSystem.
type DefaultFS struct{}
// Open implements FS
func (DefaultFS) Open(name string) (fs.File, error) { return os.Open(name) }
// MkdirAll implements FS
func (DefaultFS) MkdirAll(path string, perm fs.FileMode) error { return os.MkdirAll(path, perm) }
// FakeFS is a mock FS. The following can be done in a test before usage.
// osutil.FS = osutil.FakeFS
var FakeFS FileSystem = fakeFS{}
type fakeFS struct{}
// Open implements FileSystem
func (fakeFS) Open(name string) (fs.File, error) {
return fstest.MapFS{name: &fstest.MapFile{
Data: []byte("fake file - " + name),
}}.Open(name)
}
// MkdirAll implements FileSystem
func (fakeFS) MkdirAll(path string, perm fs.FileMode) error { return nil }