1 files changed, 0 insertions, 290 deletions
diff --git a/vendor/github.com/spf13/afero/cacheOnReadFs.go b/vendor/github.com/spf13/afero/cacheOnReadFs.go
deleted file mode 100644
index 29a26c6..0000000
--- a/vendor/github.com/spf13/afero/cacheOnReadFs.go
+++ /dev/null
@@ -1,290 +0,0 @@
-package afero
-
-import (
-	"os"
-	"syscall"
-	"time"
-)
-
-// If the cache duration is 0, cache time will be unlimited, i.e. once
-// a file is in the layer, the base will never be read again for this file.
-//
-// For cache times greater than 0, the modification time of a file is
-// checked. Note that a lot of file system implementations only allow a
-// resolution of a second for timestamps... or as the godoc for os.Chtimes()
-// states: "The underlying filesystem may truncate or round the values to a
-// less precise time unit."
-//
-// This caching union will forward all write calls also to the base file
-// system first. To prevent writing to the base Fs, wrap it in a read-only
-// filter - Note: this will also make the overlay read-only, for writing files
-// in the overlay, use the overlay Fs directly, not via the union Fs.
-type CacheOnReadFs struct {
-	base      Fs
-	layer     Fs
-	cacheTime time.Duration
-}
-
-func NewCacheOnReadFs(base Fs, layer Fs, cacheTime time.Duration) Fs {
-	return &CacheOnReadFs{base: base, layer: layer, cacheTime: cacheTime}
-}
-
-type cacheState int
-
-const (
-	// not present in the overlay, unknown if it exists in the base:
-	cacheMiss cacheState = iota
-	// present in the overlay and in base, base file is newer:
-	cacheStale
-	// present in the overlay - with cache time == 0 it may exist in the base,
-	// with cacheTime > 0 it exists in the base and is same age or newer in the
-	// overlay
-	cacheHit
-	// happens if someone writes directly to the overlay without
-	// going through this union
-	cacheLocal
-)
-
-func (u *CacheOnReadFs) cacheStatus(name string) (state cacheState, fi os.FileInfo, err error) {
-	var lfi, bfi os.FileInfo
-	lfi, err = u.layer.Stat(name)
-	if err == nil {
-		if u.cacheTime == 0 {
-			return cacheHit, lfi, nil
-		}
-		if lfi.ModTime().Add(u.cacheTime).Before(time.Now()) {
-			bfi, err = u.base.Stat(name)
-			if err != nil {
-				return cacheLocal, lfi, nil
-			}
-			if bfi.ModTime().After(lfi.ModTime()) {
-				return cacheStale, bfi, nil
-			}
-		}
-		return cacheHit, lfi, nil
-	}
-
-	if err == syscall.ENOENT || os.IsNotExist(err) {
-		return cacheMiss, nil, nil
-	}
-
-	return cacheMiss, nil, err
-}
-
-func (u *CacheOnReadFs) copyToLayer(name string) error {
-	return copyToLayer(u.base, u.layer, name)
-}
-
-func (u *CacheOnReadFs) Chtimes(name string, atime, mtime time.Time) error {
-	st, _, err := u.cacheStatus(name)
-	if err != nil {
-		return err
-	}
-	switch st {
-	case cacheLocal:
-	case cacheHit:
-		err = u.base.Chtimes(name, atime, mtime)
-	case cacheStale, cacheMiss:
-		if err := u.copyToLayer(name); err != nil {
-			return err
-		}
-		err = u.base.Chtimes(name, atime, mtime)
-	}
-	if err != nil {
-		return err
-	}
-	return u.layer.Chtimes(name, atime, mtime)
-}
-
-func (u *CacheOnReadFs) Chmod(name string, mode os.FileMode) error {
-	st, _, err := u.cacheStatus(name)
-	if err != nil {
-		return err
-	}
-	switch st {
-	case cacheLocal:
-	case cacheHit:
-		err = u.base.Chmod(name, mode)
-	case cacheStale, cacheMiss:
-		if err := u.copyToLayer(name); err != nil {
-			return err
-		}
-		err = u.base.Chmod(name, mode)
-	}
-	if err != nil {
-		return err
-	}
-	return u.layer.Chmod(name, mode)
-}
-
-func (u *CacheOnReadFs) Stat(name string) (os.FileInfo, error) {
-	st, fi, err := u.cacheStatus(name)
-	if err != nil {
-		return nil, err
-	}
-	switch st {
-	case cacheMiss:
-		return u.base.Stat(name)
-	default: // cacheStale has base, cacheHit and cacheLocal the layer os.FileInfo
-		return fi, nil
-	}
-}
-
-func (u *CacheOnReadFs) Rename(oldname, newname string) error {
-	st, _, err := u.cacheStatus(oldname)
-	if err != nil {
-		return err
-	}
-	switch st {
-	case cacheLocal:
-	case cacheHit:
-		err = u.base.Rename(oldname, newname)
-	case cacheStale, cacheMiss:
-		if err := u.copyToLayer(oldname); err != nil {
-			return err
-		}
-		err = u.base.Rename(oldname, newname)
-	}
-	if err != nil {
-		return err
-	}
-	return u.layer.Rename(oldname, newname)
-}
-
-func (u *CacheOnReadFs) Remove(name string) error {
-	st, _, err := u.cacheStatus(name)
-	if err != nil {
-		return err
-	}
-	switch st {
-	case cacheLocal:
-	case cacheHit, cacheStale, cacheMiss:
-		err = u.base.Remove(name)
-	}
-	if err != nil {
-		return err
-	}
-	return u.layer.Remove(name)
-}
-
-func (u *CacheOnReadFs) RemoveAll(name string) error {
-	st, _, err := u.cacheStatus(name)
-	if err != nil {
-		return err
-	}
-	switch st {
-	case cacheLocal:
-	case cacheHit, cacheStale, cacheMiss:
-		err = u.base.RemoveAll(name)
-	}
-	if err != nil {
-		return err
-	}
-	return u.layer.RemoveAll(name)
-}
-
-func (u *CacheOnReadFs) OpenFile(name string, flag int, perm os.FileMode) (File, error) {
-	st, _, err := u.cacheStatus(name)
-	if err != nil {
-		return nil, err
-	}
-	switch st {
-	case cacheLocal, cacheHit:
-	default:
-		if err := u.copyToLayer(name); err != nil {
-			return nil, err
-		}
-	}
-	if flag&(os.O_WRONLY|syscall.O_RDWR|os.O_APPEND|os.O_CREATE|os.O_TRUNC) != 0 {
-		bfi, err := u.base.OpenFile(name, flag, perm)
-		if err != nil {
-			return nil, err
-		}
-		lfi, err := u.layer.OpenFile(name, flag, perm)
-		if err != nil {
-			bfi.Close() // oops, what if O_TRUNC was set and file opening in the layer failed...?
-			return nil, err
-		}
-		return &UnionFile{Base: bfi, Layer: lfi}, nil
-	}
-	return u.layer.OpenFile(name, flag, perm)
-}
-
-func (u *CacheOnReadFs) Open(name string) (File, error) {
-	st, fi, err := u.cacheStatus(name)
-	if err != nil {
-		return nil, err
-	}
-
-	switch st {
-	case cacheLocal:
-		return u.layer.Open(name)
-
-	case cacheMiss:
-		bfi, err := u.base.Stat(name)
-		if err != nil {
-			return nil, err
-		}
-		if bfi.IsDir() {
-			return u.base.Open(name)
-		}
-		if err := u.copyToLayer(name); err != nil {
-			return nil, err
-		}
-		return u.layer.Open(name)
-
-	case cacheStale:
-		if !fi.IsDir() {
-			if err := u.copyToLayer(name); err != nil {
-				return nil, err
-			}
-			return u.layer.Open(name)
-		}
-	case cacheHit:
-		if !fi.IsDir() {
-			return u.layer.Open(name)
-		}
-	}
-	// the dirs from cacheHit, cacheStale fall down here:
-	bfile, _ := u.base.Open(name)
-	lfile, err := u.layer.Open(name)
-	if err != nil && bfile == nil {
-		return nil, err
-	}
-	return &UnionFile{Base: bfile, Layer: lfile}, nil
-}
-
-func (u *CacheOnReadFs) Mkdir(name string, perm os.FileMode) error {
-	err := u.base.Mkdir(name, perm)
-	if err != nil {
-		return err
-	}
-	return u.layer.MkdirAll(name, perm) // yes, MkdirAll... we cannot assume it exists in the cache
-}
-
-func (u *CacheOnReadFs) Name() string {
-	return "CacheOnReadFs"
-}
-
-func (u *CacheOnReadFs) MkdirAll(name string, perm os.FileMode) error {
-	err := u.base.MkdirAll(name, perm)
-	if err != nil {
-		return err
-	}
-	return u.layer.MkdirAll(name, perm)
-}
-
-func (u *CacheOnReadFs) Create(name string) (File, error) {
-	bfh, err := u.base.Create(name)
-	if err != nil {
-		return nil, err
-	}
-	lfh, err := u.layer.Create(name)
-	if err != nil {
-		// oops, see comment about OS_TRUNC above, should we remove? then we have to
-		// remember if the file did not exist before
-		bfh.Close()
-		return nil, err
-	}
-	return &UnionFile{Base: bfh, Layer: lfh}, nil
-}